BACKGROUND ART The use of blunt instruments (night sticks, etc.) by police and other personnel for crowd control and for subduing other individuals, has been known for generations. Very little has been done over the years to improve such hand held impact weapons, other than changing the mass of different portions to impart greater force upon impact. More recently, electronic devices have been developed which transform a relatively low battery voltage into a considerably higher voltage, for use as an electrical stunning device.

Such devices are quite effective in subduing a threatening individual, or even a small crowd, as the audible and visual impression generated by the electrical arc across the contacts, is quite intimidating.

However, such electrical stun devices are generally constructed with relatively fragile electrical components which cannot withstand a great deal of impact force. Such stun devices of the prior art are not intended for any other use, and are used solely as an electrical discharge device, with the contacts being placed against a potential attacker or other person who must be subdued. While this may result in a thrusting of the device toward the other person, the physical forces involved are nowhere near those to which a blunt impact weapon (night stick or baton, etc. ) would be subjected. The relative fragility of such

electrical stun weapons has thus resulted in law enforcement officers being required to carry a separate baton or night stick in addition to the electrical stun device, as well as all their other equipment (hand gun, cuffs, etc. ). The mass and bulk of all this equipment can be distracting to say the least, and can certainly encumber an officer when he must move rapidly. Moreover, the requirement for two similarly shaped elongated weapons or devices (baton and electrical stun prod) can easily result in a moment's hesitation or confusion when the officer reaches for one or the other, in a situation where time is critical.

Accordingly, a need will be seen for a personal defense device which combines attributes of the baton with those of an electrical stunning device, as well as other attributes and features, in a single device.

The present defense device is constructed of a relatively massive and thick walled material, in order to provide the desired mass for use as an impact weapon. Yet, the device has a hollow interior, in order to house the electrical storage cells and electrical componentry for the electrical stun system ofthe device.

Moreover, the present device includes a series of blunt edges disposed along the barrel thereof, which provide greater effectiveness as an impact weapon. These blunt edges may be equipped with relatively shallow cutting edges to produce a bleeding cut or wound, if so desired. A high intensity flashlight or the like may also be built into the device for greater versatility, with the light utilizing the same electrical energy source as the stun circuitry. The present defense device may also make use of redundant flex circuitry and/or redundant componentry for reliability and impact damage resistance. In a first embodiment, a novel, normally on interrupter switch for the stun circuit is provided to facilitate use of the device by an officer, with other embodiments incorporating more conventional, momentary contact actuation switches.

A discussion of the related art of which the present inventor is aware, and its differences and distinctions from the present invention, is provided below.

U. S. Patent No. 427,549 issued on May 13,1890 to John M. Burton, titled"Electric Prod Pole, " describes two embodiments of such a device. The first embodiment of Fig. 1 is a very low voltage device, as it relies upon an"element B" (taken to be an electrical storage cell), but does not include any means of inverting the current for stepping up the voltage. The second embodiment uses a mechanical generating device, rather than a battery. In any event, the device of the Burton549 U. S. Patent is quite long and thin, and is not adapted for use as an impact weapon in addition to its electrical prod function.

U. S. Patent No. 1,158, 473 issued on November 2, 1915 to William B. Floyd, titled"Electric Animal Prod,"describes adevice similartothat ofthe Burton'549 U. S. Patent described immediately above. The Floyd prod is also a relatively long and thin device, with electrical storage batteries carried in a larger diameter handle portion. No appreciable mass is provided in the distal portion of the device, as it is desired to make the distal portion as light as possible in such devices to facilitate maneuverability.

This teaches away from the present invention, with its relatively massive distal portion to provide relatively large inertial forces for use as an impact weapon, as well as providing the desired strength and durability for the device.

U. S. Patent No. 2,176, 994 issued on October 24,1939 to Lorentz A. Hansen et al. , titled<BR> "Electric Stock Prod, "describes a device utilizing a conventional capacitor and vibrator points for producing an alternating current from the direct current of the electrical storage batteries within the device.

A coil having primary and secondary windings is used to step up the voltage to the desired level. This device is capable of producing a continuous array of high voltage discharges, unlike the devices discussed further above. While the circuitry of the Hansen et al. device is old in the art, such circuitry or its equivalents may be used in the present invention, and the disclosure of such is incorporated herein by reference. However, Hansen et al. do not disclose a relatively massive barrel portion for use as an impact weapon, nor other means (blades, etc. ) for such impact function.

U. S. Patent No. 2,208, 852 issued on July 23,1940 to Leon P. Mongan, titled"Electric Prodder," describes a combination device including a voltage step-up circuit and light circuit, each powered by the same battery power source. The electrical voltage step-up circuitry is essentially the same as that used by Hansen et al. and disclosed in the'994 U. S. Patent discussed immediately above. This basic circuitry may be used with the present invention, as noted above. However, it is desired to use more durable circuitry incorporating flex circuits, redundant wiring, solid state componentry, and/or redundant componentry in the present invention, rather than the older mechanical componentry ofthe Mongan and similar earlier devices. In any case, Mongan does not provide any means for using his device as an impact weapon, and further teaches away from the first embodiment of the present stun device by providing an open circuit until one of the contacts is pushed in. The normally closed high intensity electrical circuit of the first embodiment

of the present personal defense device invention, may be desirable in certain circumstances where the user must manipulate the device as an impact weapon simultaneously with actuation of the high voltage electrical discharge, in that the user need not position his or her hand specifically to hold the switch while also manipulating the device. The visual and audible effects of the electrical arcing are actuated under such circumstances to provide a deterrent effect, regardless of the position of the user's hand on the switch.

U. S. Patent No. 2, 561, 122 issued on July 17,1951 to John Juergens, titled"Livestock Prod," describes a device having a spring mounted distal end with a selectively operable light source concentric with the annular electrical contact probes. The light and electric contacts are operated by a single, double throw switch. Thus, either the light or the electrical contacts may be actuated, but not both simultaneously.

Moreover, the resiliently mounted distal end teaches away from the rigid, massive structure of the present personal defense device invention, which may also be used as an impact weapon.

U. S. PatentNo. 3, 362, 711 issued on January 9, 1968 to LaVerne M. Larsen et al., titled"Night Stick With Electric Shock Means, "describes a stick having external high voltage wiring, as well as the conventional high voltage contacts extending from the distal end of the stick. The object of the Larsen et al. stick is to prevent unauthorized persons from grasping the stick and pulling it from the grip of the officer or other person controlling the stick. Larsen et al. disclose a transistorized circuit for controlling electrical power in their night stick, but no means of providing alternating current to produce a continuing series of discharges, is disclosed. The Larsen et al. night stick requires that the actuating switch be closed each time a single electrical pulse is desired, with the electrical energy dissipating as the switch remains closed and voltage stabilizes through the transformer coil.

U. S. Patent No. 3,625, 222 issued on December 7,1971 to Kunio Shimizu, titled"Baton-Type Arrest Device, "describes a device having a pair of electrically conductive needles selectively extendible from one end thereof. No electrical switch is provided, except by means of current flow between the two contacts. Shimizu states that by penetrating the skin, the electrical current administered may be much less to gain the desired affect than that achieved with skin contact electrodes. Accordingly, no voltage step up is provided by Shimizu. Also, while Shimizu provides an axially placed light in one end of his night stick, the light cannot be directed radially from the side of the device.

U. S. PatentNo. 3,819, 108 issued on June 25, 1974 to Richard J. Jordan, titled"Crowd Control Stick, "describes a device bearing some resemblance to the night stick of the Larsen et al. '711 U. S.

Patent, discussed further above. The Jordan stick also includes external high voltage wiring to preclude an unauthorized person from grabbing the stick and taking it from the operator. However, the Jordan stick utilizes a capacitor discharge system for producing the higher voltages desired. In any event, the Jordan stick still differs from the present device in that the power supply for the Jordan device must be provided as a separate unit and connected to the stick with a cable. Also, Jordan does not provide any form of lighting means nor impact enhancing means with his stick.

U. S. PatentNo. 4,092, 695 issued on May 30, 1978 to Gary A. Henderson et al., titled"Electrical Shocking Device,"describes a relatively small and light weight device including transistorized circuitry for producing a high voltage, low amperage current capable of producing an electric shock to a person contacting the electrodes. The Henderson et al. device is only about ten inches long and less than an inch in diameter, and weighs less than five ounces (col. 3, lines 41-43). Such size and weight is not suitable for use as an impact weapon, night stick, or billy club, whereas the present device provides sufficient mass and size to be useful as an impact weapon as well. Also, no lighting means is disclosed by Henderson et al.

U. S. PatentNo. 4,424, 932 issued on January 10,1984 to Gerald F. Allen, titled"Electric Shock Prod, "describes a device incorporating conventional transistorized circuitry, which disclosure is incorporated herein by reference as yet another means of providing the high voltage output required for the operation of the present invention. The Allen prod differs from others in that the extension is a relatively thin and flexible blade. This construction clearly teaches away from the aim of the present invention, i. e., to serve as a night stick or impact weapon as well as being useful as an electrical stun device. Allen does not disclose any form of lighting for his prod device.

U. S. Patent No. 4,479, 171 issued on October 23, 1984 to Gregg B. Mains, titled"Side Arm Baton And Flashlight,"describes a relatively long, cylindrical device having battery storage space therein, a light at one end thereof, and a radially extended handle with a light switch at the end thereof. No means

of producing or dispensing a high voltage electrical current or shock is provided by Mains for his light and baton combination.

U. S. PatentNo. 4,486, 807 issued on December 4, 1984 to Serge J. Yanez, titled"Non-Lethal Self Defense Device, "describes various embodiments of an electrical stun apparatus, having different configurations. Yanez includes a light with his electrical discharge apparatus, but the light is not intended to provide any real degree of illumination for the person using the device. Rather, the Yanez light pulses or flashes with the voltage output, producing a series of flashes to temporarily blind an assailant.

Accordingly, no separate switch is provided to operate the light for the Yanez device; both the light and the electrical voltage output (and an audible alarm, when installed) are controlled by a single switch, unlike the present invention.

U. S. Patent No. 4,667, 431 issued on May 26,1987 to Lyle J. Mendicino, titled"Shark Prod," describes an electrical device which emits a relatively low voltage (around 500 volts) and high amperage (1-5 amps), in comparison with electrical stun devices and cattle prods. This is because the diver is also subject to the electrical current, particularly in the salty ocean environment of sharks. Accordingly, Mendicino teaches away from the use of a high voltage, low amperage current as used by the present invention. Moreover, the only light provided by Mendicino is an annunciator light to indicate operation of the device, and actual actuation of the electrical circuitry is accomplished by contact with the probes, rather than by means of an operator controlled switch.

U. S. Patent No. 4,719, 534 issued on January 12, 1988 to Gary S. Ward, titled"Electric Shock Safety Device, "describes a stun type device having a telescoping probe end, with the probe comprising a series of mutually telescoping elements. The Ward device is more intended for use by joggers and bicyclists against threatening dogs and the like. The relatively thin and extended telescoped probe cannot provide the required strength for use as an impact weapon (night stick or the like), as provided by the present multipurpose device. Moreover, Ward does not provide any form of lighting with his device.

U. S. Patent No. 4,842, 277 issued on June 27,1989 to Eugene F. LaCroix, titled"Multi-Purpose Baton, "describes a device somewhat resembling the flashlight and baton apparatus of the Mains'171 U. S.

Patent, with its laterally disposed hand grip. However, LaCroix also provides a series of longitudinally

disposed electrical conductors along the length of the device, similarly to the configuration of the device of the Jordan'108 U. S. Patent discussed further above. LaCroix also provides a light having sufficient intensity to temporarily blind a potential assailant, rather than to provide any useful illumination for the user of the device. At least one embodiment ofthe present personal defense device may incorporate such a high intensity light, with the light also providing illumination as desired or required. Moreover, the present invention may incorporate one or more lenses for changing the color of the light, which feature is not disclosed by LaCroix. The lateral extension of the LaCroix device does not facilitate its use as an impact weapon, as provided by the generally cylindrical configuration of the present device.

U. S. Patent No. 5,467, 247 issued on November 14,1995 to Richard N. de Anda et al. , titled<BR> "Electronic Stunning Apparatus, "describes a device having concealed electrical contacts which are not exposed until the device is pressed against another body. The de Anda et al. device is relatively small, being about the size of a flashlight. It is thus not suitable for use as an impact weapon, as provided by the present invention. The de Anda et al. device more closely resembles the relatively small device disclosed in the'695 U. S. Patent to Henderson et al., than it does the present personal defense device. Moreover, de Anda et al. do not disclose any form of lighting with their device, and the concealed electrical contacts cannot provide a visible display of electrical discharge to dissuade a potential attacker.

U. S. PatentNo. 5,654, 867 issued on August 5,1997 to John H. Murray, titled"Immobilization Weapon, "describes a hand held device with a pair of elongated flexible electrodes and a set of electrodes which can be ballistically fired at another person in order to deliver an electrical shock remotely. While at least one embodiment ofthe present invention may incorporate remotely actuated electrical contacts, they are not ballistically fired. Rather, they are placed upon the subject by the person in control, with electrical cables or leads extending between the subject and the present defense device to allow the controlling person to maintain a safe distance from the subject. The Murray device has a square section, pistol grip configuration with a relatively short upper portion for firing the ballistically delivered electrodes.

The two elongated electrodes extending from the Murray device, extend from the top of the device above the pistol grip portion. The physical configuration of the Murray device does not enable it to be used as an impact weapon, e. g. , night stick, etc. , as can the present personal defense device.

U. S. Patent No. 5,962, 806 issued on October 5,1999 to Peter G. Coakley et al. , titled"Non- Lethal Projectile For Delivering An Electric Shock To A Living Target,"describes a series of embodiments for ballistically launching an independent device capable of delivering an electric shock to a living target.

The shocking device of the Coakley et al. apparatus is not connected to the firing weapon in any way, as by wires, etc. as used in some projectile firing devices of the prior art. Thus, the electrical device cannot be controlled once it leaves the weapon. Also, while Coakley et al. disclose baton and flashlight embodiments oftheir projectile and delivery device, they do not provide a device having all of the features of the present invention, e. g. , ribs for greater impact, low blades which may be attached to the ribs for imparting minor cuts, or radially disposed lighting means.

U. S. PatentNo. 5,986, 872 issued onNovember 16, 1999 to Eugene M. Chaput, titled"Multi- Component Electric Stunning Umbrella,"describes a device having electrical storage cell and electronic component means in the handle, with electrical wiring extending up the relatively narrow shaft thereof to a distal tip having a pair of stunning electrodes therein. A more or less conventional umbrella is extendible from the tip, permitting the device to be used as an umbrella as desired. A hard plastic cover may be installed over the folded umbrella, as desired. Chaput states that this hard plastic cover permits the device to be used as a baton or impact weapon, but this would require that the plastic sleeve be installed over the folded umbrella whenever the potential need of an impact weapon was foreseen. Moreover, while Chaput provides additional electrodes along the sides of the impact sleeve, he does not provide any additional ribs or blades to increase the effectiveness of the device as an impact weapon, as provided by the present personal defense device.

U. S. Patent No. 6,022, 120 issued on February 8,2000 to Hung-Yi Chang, titled"Lighting Device For A Stun Gun, "describes a separate flashlight type device with the light beam oriented axially relative to the remainder of the device, rather than radially, as in the lighting means of the present device. The Chang assembly cannot be used as an impact weapon, as it is relatively short and compact, with the operating switches located at the approximate midpoints along the opposite sides thereof.

U. S. Patent No. 6,091, 597 issued on July 18,2000 to Ming-ChenLin, titled"Structure Of An Electric Shock Device, "describes a device having a series of selectively extendible telescoping sections.

The sections each have electrodes extending along their opposite sides, but no tip electrodes are provided.

Also, while the Lin device includes a flashlight, the light is oriented parallel to the length ofthe device, rather than being radially disposed to the length of the device. Moreover, the hollow telescoping tubes of the Lin device do not appear to provide sufficient strength for use as an impact weapon (baton, etc. ), and Lin makes no disclosure or claim of such function for his device.

U. S. PatentNo. 6,256, 916 issued on July 10,2001 to Thomas V. McNulty, titled"Stun Gun," describes a device having a short, pistol grip configuration with a trapezoidal head extending therefrom.

The two electrical contacts are on adjacent faces of the trapezoid, angularly separated from one another.

McNulty states that this causes the trapezoidal shape to compress the muscle tissue of the subject before both contacts are in contact with the skin, thus providing a greater electric shock effect and muscle contraction. The McNulty device more closely resembles the device of the'867 U. S. Patent to Murray, discussed further above, than it does the present invention. McNulty also provides a ballistically fired device having electrical stunning contacts with his device. However, The relatively short length of the McNulty stun device is not suitable for use as an impact weapon or baton, and no lighting means is provided by McNulty for his device.

U. S. PatentNo. D-255,139 issued on May 27,1980 to James A. Smith, titled"Electric Baton For Law Enforcement Personnel,"illustrates a design comprising a relatively short, generally cylindrical device. An electrical switch is apparently provided at about the midpoint of the device, which further precludes its use as an impact weapon or baton. No additional impact ribs, blades, or lighting means are apparent in the Smith design.

U. S. PatentNo. D-273,216 issued on March 27,1984 to Harold S. Sinrod, titled"Multi-Purpose Defense Baton, "illustrates various embodiments of a design comprising a relatively narrow, elongated cylindrical shape with a hand guard between a handle portion and longer distal portion. No electrical function of any sort is apparent in the Sinrod design.

U. S. Patent No. D-289,313 issued on April 14,1987 to More Shy, titled"Hand-Held Electric Prod, "illustrates a design having a generally cylindrical shape with a hand guard adjacent one end. No disclosure is made of any function as an impact weapon, nor is any lighting means shown for the design.

The Shy design more closely resembles the design of the'216 U. S. Design Patent to Sinrod, discussed above, than it does the present invention.

U. S. Patent No. D-329, 510 issued on September 15,1992 to Hsiung Lin, tiled"Hand-Held Electric Prod,"illustrates a design comprising a relatively short, generally cylindrical device having a hand guard between a handle portion and distal portion. The Lin device thus more closely resembles the device ofthe de Anda et al. '247 U. S. Patent, discussed further above, than it does the present personal defense device. While no statement of such is made in the Lin Design Patent, it appears that the electrodes are disposed along the opposite sides of the distal end portion of the device, rather than from the end, as in the present device.

U. S. Patent No. D-351,640 issued on October 18,1994 to Richard N. de Anda et al. , titled<BR> "Electronic Stunning Weapon, "illustrates a design apparently identical to the device ofthe'247 U. S. Utility Patent issued to the same inventors and filed on even date, discussed further above. The same points of difference raised in the discussion of the de Anda et al. '247 U. S. Utility Patent, are seen to apply here as well.

Finally, British Patent Publication No. 2,196, 728 published on May 5,1988 to Chun Chang Kuo, titled"Flash Light, "describes an apparatus which is actually a combination of several devices. The Kuo apparatus includes an axial flashlight, as well as selectively extendible electrical probes for the device to serve as a stun weapon if so desired. Moreover, the Kuo apparatus includes an audible warning system, e. g. , a buzzer or siren, and the flashlight may be used as a visual warning device as well. However, Kuo<BR> makes no statement or claim that his apparatus is suitable for use as an impact weapon (baton, etc. ). The light is disposed in the distal end of the device, and it is questionable whether the light, as well as other componentry, would stand up to the forces resulting from use of the device as an impact weapon.

None of the above inventions and patents, taken either singularly or in combination, is seen to describe the instant invention as claimed. Thus a personal defense device solving the aforementioned problems is desired.

DISCLOSURE OF THE INVENTION The invention is a personal defense device. The device includes an elongated, electrically non- conducting, hard, rigid, generally cylindrical, hollow tube with a handle end and an electrical discharge end.

The electrical discharge end is opposite the handle end. The hollow tube has a circumferential wall. First and second electrodes extend from the electrical discharge end of the tube. Electrical circuitry is disposed within the tube. The electrical circuitry is for increasing voltage to a high level for selectively producing an electrical discharge of stunning intensity from the electrodes. The wall of the tube includes at least one blade installation channel formed therein, extending from a point adjacent the electrical discharge end of the tube toward the handle end of the tube.

Also part of the invention is a personal defense device having a hollow tube, first and second electrodes, and electrical circuitry as described above. The device has a high intensity light disposed in the tube and selectively projecting light radially therefrom. The high intensity light produces sufficient illumination to temporarily visually disable a person at whom the high intensity light is directed and activated. A selectively rotating collar is disposed circumferentially about the tube and over the high intensity light. The collar includes at least two colored lenses and one open passage circumferentially disposed therein. The collar is selectively rotated to position one of the colored lenses or the open passage over the high intensity light for selectively filtering illumination from the high intensity light as desired.

Another embodiment of the invention has a hollow tube, first and second electrodes, and electrical circuitry as described above. The device also has at least one user replaceable electronic component disposed within the tube. An access cover is disposed over the user replaceable electronic component.

A selectively rotating collar is disposed circumferentially about the tube and over the access cover. The collar includes at least one open passage circumferentially disposed therein. The collar is selectively rotated to position the one open passage over the access cover for accessing the access cover for removal thereof to access the user replaceable electronic component.

Another embodiment of the invention has a an elongated, electrically non-conducting, hard, rigid, generally cylindrical, hollow tube having a handle end and an electrical discharge end. The electrical

discharge end is opposite the handle end. The device has first and second electrodes and electrical circuitry as described above. This embodiment also has at least one electrically non-conducting, rigid, elongate impact rib projecting from the tube and extending from a point adjacent the electrical discharge end of the tube toward the handle end of the tube.

Another embodiment of the invention has an elongated, electrically non-conducting, hard, rigid, generally cylindrical, hollow tube having a handle end and an electrical discharge end. The electrical discharge end is opposite the handle end. First and second electrodes extend from the electrical discharge end of the tube. Redundant, dual flex electrical circuitry is disposed within the tube. The electrical circuitry is for increasing voltage to a high level for selectively producing an electrical discharge of stunning intensity from the electrodes.

Another embodiment of the invention has an elongated, electrically non-conducting, hard, rigid, generally cylindrical, hollow tube having a handle end and an electrical discharge end. The electrical discharge end is opposite the handle end. First and second electrodes extend from the electrical discharge end of the tube. Electrical circuitry is disposed within the tube. The electrical circuitry is for increasing voltage to a high level for selectively producing an electrical discharge of stunning intensity from the electrodes. A master switch controls the electrical circuitry for selectively producing the electrical discharge. A normally closed, momentary contact switch is disposed in series with the electrical circuitry.

Release of the momentary contact switch activates the electrical circuitry for selectively producing the electrical discharge, when the master switch is on.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a first embodiment of a personal defense device according to the present invention, illustrating its general configuration and features.

Fig. 2 is a fragmented longitudinal view in section of the rearward or handle portion of the personal defense device of Fig. 1, showing the flex circuitry and various internal details thereof.

Fig. 3 is an exploded perspective view of the forward portion of the personal defense device of Figs. 1 and 2, showing the impact ribs and removable attachment of blades and blade guards thereto.

Fig. 4 is a schematic diagram illustrating the dual path electrical circuitry provided for reliability in the first embodiment personal defense device of Figs. 1 through 3.

Fig. 5 is a front and side perspective view of a second embodiment of the present personal defense device, illustrating its general configuration and features.

Fig. 6 is a rear and side perspective view of the personal defense device embodiment of Fig. 5, showing a removable end cap and further features.

Fig. 7 is an exploded side elevation view of the personal defense device of Figs. 5 and 6, illustrating a series of removably attachable components therefor.

Fig. 8 is a block diagram ofthe major electrical components ofthe electric arc output system of the personal defense device of Figs. 5 through 7.

Similar reference characters denote corresponding features consistently throughout the attached drawings.

BEST MODES FOR CARRYING OUT THE INVENTION A hand held personal defense device includes a number of different features to provide a versatile defense weapon for law enforcement and other personnel who have need of such a device. The present device comprises numerous embodiments of an elongate, generally cylindrical tube having electrical contacts extending from one end thereof and conventional electrical circuitry therein to step up electrical cell voltage to a high level for use as a stunning weapon and deterrent.

The structure of the device is formed of a high strength synthetic composite or non-composite material for optimum durability, and may includes a series of ribs or channels along the exterior surface for greater effect as an impact weapon. One or more blades may be attached to the ribs or within the

channels in order to produce shallow cuts upon the body of a person when struck by the present device.

The present device also may include a small but powerful light source emitting its light radially from the body of the device, for effectiveness when the device is raised for use as an impact weapon. The light source is sufficiently powerful as to temporarily blind a person whose eyes have become dark adapted.

The electrical circuitry of the present device is adapted to provide great durability and resistance to damage under high impact forces, as will likely occur from time to time with the use of the device.

The present invention also includes embodiments of a personal defense device, combining features of an electrical stun weapon or device with an impact weapon (baton, night stick, or the like) and a small, high intensity light. These features have not been combined into a single device, prior to the development of the present invention. In addition, the present defense device incorporates extremely durable, redundant electrical circuitry and componentry, in order to provide the desired reliability and durability for the electrical system when employed with an impact weapon.

Figs. 1 through 4 of the drawings illustrate the general configuration, various details, and electrical system of a first embodiment of the present personal defense device. Fig. 1 provides a perspective view of the general configuration of the first embodiment personal defense device, indicated by the reference numeral 10 throughout the drawings. The personal defense device 10 generally comprises an elongated, generally cylindrical, hollow tube 12, having a handle end 14 and a distal electrical discharge end 16 opposite the handle end 14. The tube 12 may be formed of a variety of materials, but as the present device 10 is used as an impact weapon as well as an electrically discharging stunning weapon, the material used is preferably a hard, rigid, somewhat dense material, capable of withstanding impact forces when used as a police baton, club, or the like. Due to the high electrical voltages developed by the electrical circuitry of the present invention, the material preferably has a very high dielectric property, at least greater than that of air, in order to preclude electrical arcing across or through the material. A composite material formed by a thermosetting resin in a synthetic fiber matrix, e. g., Ultra* comp@ UC-200, made by Tri-Star Plastics Corp. of Shrewsbury, Massachusetts has been found to meet these requirements. However, other suitable materials may be substituted as desired.

The handle end 14 may be equipped with a removable cap 18 for accessing electrical storage cells (batteries) and/or other internal componentry. A wrist strap 20 or the like may be secured to the device 10 by the handle end cap 18, if so desired. The opposite electrical discharge or output end 16 may be equipped with a similar cap 22, with the electrical stunning electrodes 24 and 26 extending therefrom.

Preferably, the caps 18 and 22 are provided with seals or other suitable means to provide a waterproof fit.

Two concentric sleeves 28 and 30 may be installed about the tube 12 in the approximate medial area thereof, or more precisely, somewhat closer to the handle portion 14 of the assembly. These sleeves 28 and 30 secure the switches controlling the high voltage circuitry for the present invention, as shown pictorially in Fig. 2 and schematically in Fig. 4 of the drawings. A master switch 32 is provided to turn the high voltage stun circuitry on and off, with a second, momentary contact switch 34 being provided to enable and disable the electrical stun circuitry as desired.

The master switch 32 is preferably a rocker type switch, with opposite ends of the switch either actuating or deactivating the high voltage circuit alternately as they are pushed. The secondary switch 34 is preferably normally on or closed, and is wired in series with the master switch 32 and/or high voltage circuit. The operator of the present personal defense device 10 normally actuates the electrical circuitry by turning the master switch 32 on when it appears that the need for electrical stun capability may be needed. The operator then holds the secondary switch 34 to keep it open, thus keeping the high voltage circuitry in a deactivated condition. However, when the operator releases the secondary switch 34, the high voltage system is activated. The operator thus need not continually hold a switch in order to keep the high voltage circuitry activated. These switches 32 and 34 are secured within passages through the tube 12 wall by the sleeves 28 and 30, and are preferably encased in rubber or the like to provide a waterproof assembly and preclude electrical arcing from the switches.

Fig. 2 provides a pictorial view of the voltage step-up and other circuitry within the tube 12 of the device 10, while Fig. 4 provides a schematic view of the circuitry. The electrical circuitry used with the present invention is flexible (or"flex") circuitry, insofar as possible. Flex circuitry, rather than using conventional insulated wires, utilizes thin, flexible plastic sheet material with conductive material imprinted

or otherwise formed thereon, in a similar manner to that used in the formation of conventional printed circuit boards and the like. However, rather than using rigid board-like material, the circuitry of the present invention utilizes a thin, flexible plastic central board or sheet 3 6 (shown with its lower left corner flexed upwardly, in Fig. 2) which contains most of the various electronic components 3 8 which operate the high voltage system of the present invention. A series of flex circuit lines, described specifically further below and in Fig. 4, extend from the"mother board"36 to the various electronic components of the present invention. Such flex circuitry is conventional, and is used in the aviation and automotive industries to provide good reliability and durability in harsh environments where electronics are exposed to vibration and other forces.

The voltage step-up and lighting systems of the present invention are powered by a pair of nine volt electrical cells (batteries) 40, wired in parallel, as shown in Fig. 4. The cells or batteries 40 are preferably wrapped in an insulating sleeve 42 of neoprene or other material, in order to keep them warmer and provide more efficient operation in colder temperatures.

The various electrical connectors extending between components are preferably formed of thin, flat flex circuitry, as noted further above. In addition, all of the wiring or circuitry is redundant, with each connector element carrying two electrical paths, designated as paths a and b, in Fig. 4 of the drawings.

For example, the lines 44 between the batteries 40 and the main control circuit are indicated as circuits 44a and 44b in Fig. 4. The lines 46 extending from the control circuit board or sheet 36 to the master and secondary switches 32 and 34 are designated as separate, parallel circuits 46a and 46b in Fig. 4. (It will be noted that the pictorial view of Fig. 2 illustrates these lines 46 as returning separately to the control sheet 36, while they are wired in series between the batteries 40 and the control board or sheet 36. A number of different circuit routings are possible, but the principle remains the same. ) The electrical conductors 48 and 50 extending between the control board 36 and the respective electrodes 24 and 26 (with a capacitor 52 illustrated in the circuit therewith in Fig. 4), are indicated as conductors 48a, 48b, 50a, and 50b in Fig.

4. Finally, the lighting circuit 54 is indicated by conductor paths 54a and 54b in Fig. 4. The provision of parallel, dual circuit paths for the electrical circuitry of the present invention provides a significant improvement in reliability and durability over conventional single wire circuit runs used in other electrical

stun devices of the prior art, and enables the present invention to be used as an impact weapon without damage to the electrical and electronic elements thereof.

A number of different electrical or electronic circuits may be used to provide the voltage step-up required to provide the desired high voltage to the two electrodes 24 and 26 from the two nine volt batteries 40. Older technology may make use of vibrator points to develop the alternating (actually pulsating dc) current required to drive the transformers to step up the voltage to the level desired. The present invention may make use of such mechanical point systems, but preferably utilizes conventional solid state oscillator circuitry to produce the variable voltage required to drive a step-up transformer to arrive at the proper voltage. Any such systems are conventional, and may be incorporated herein.

In addition to the above circuitry for providing the required high voltage to the electrodes 24 and 26, the present personal defense device 10 may also include a light source (e. g. , small flashlight or signal<BR> light, etc. ) if so desired. Figs. 2 and 4 also illustrate such a lighting system incorporated with the present invention. A small, bright light source 56 is located in a housing within the tube 12, and is controlled by a switch 58. The switch 58 may be a single pole type, as shown schematically in Fig. 4 of the drawings.

However, all of the switches 32,34, and 58 may also be conventional double pole types for greater redundancy and reliability, if so desired. A fiberoptic (acrylic) rod or bundle 60 extends from the light source 56 to an output 62 which projects radially from the tube 12. Different lenses 64 (e. g. , infrared,<BR> ultraviolet, etc. ) may be installed between the light source 56 and fiberoptic line 60, as desired.

The present personal defense device 10 is a multi-purpose tool, and is useful as an impact weapon (baton, club, etc. ) as well as an electrical stunning device and light, as noted further above. Figs. 1 and 3 (particularly Fig. 3) illustrate the external configuration of the present device 10 for use as an impact weapon. At least one (and preferably a series of) hard, rigid, elongate impact rib (s) 66 project (s) radially from the exterior of the tube 12 and extend (s) therealong, from a point near the electrode or electrical discharge end cap 22, back toward the handle portion 14 of the tube 12, stopping short of the two switch securing sleeves 28 and 30. The ribs 66 are preferably formed ofthe same material, e. g., Ultra*comp UC-200, as the remainder of the exterior of the device 10, but other materials may be substituted as desired, so long as they are electrically non-conductive and provide the other desired properties of

hardness, strength, durability, etc. The ribs 66 may be disposed along only one side of the impact end 16 of the tube 12, in order to allow the operator to use the opposite smooth, non-ribbed side or surface if less force is required.

Fig. 3 illustrates a further embodiment of the invention, in which the ribs 66 are provided with a series of mounting holes 68 for the removable attachment of a shallow, radially disposed cutting blade 70 to each rib 66. The blades 70 are equipped with a like series of attachment holes 72, through which a series of bolts 74 or the like may be installed. The bolts may be retained by threading the rib holes 68, inserts within the rib holes 68, conventional nuts 76 on the opposite sides of the blades, etc.

The blades 70 are preferably formed of corrosion resistant steel, for toughness, durability, and ease of maintenance. Other materials may be used as desired. Each blade 70 has a relatively shallow, widely angled, but sharp, cutting edge therealong. The object of the blades 70 is not to inflict serious arterial bleeding through a deep cut, but rather to break the skin of an assailant to produce some bleeding as a secondary effect while primarily inflicting a certain amount of pain, in order to distract and slow an assailant. Blade guards 78 formed of heat shrink tape or other suitable material, may be applied to the blades 70 in order to protect persons handling the present device 10. Such relatively thin plastic tape 78 may be left in place at all times, including during use of the present device 10, as the tape is easily cut through by the blades 70 upon impact.

Figs. 5 through 8 of the drawings illustrate a second embodiment of the present personal defense device, and a series of attachments and accessories therefor. Fig. 5 provides a perspective view of the general configuration of the second embodiment personal defense device, indicated by the reference numeral 100 throughout the drawings. The personal defense device 100 generally comprises an elongated, generally cylindrical, hollow tube 102, having a handle end 104, a distal electrical discharge end 106 opposite the handle end 104, and a generally circumferential wall 107. The tube 102 may be formed of a variety of materials, but as the present device 100 is used as an impact weapon as well as an electrically discharging stunning weapon, the material used is preferably a hard, rigid, somewhat dense material, capable of withstanding impact forces when used as a police baton, club, or the like. Due to the high electrical voltages developed by the electrical circuitry ofthe present invention, the material preferably has

a very high dielectric property, at least greater than that of air, in order to preclude electrical arcing across or through the material. A composite material formed by a thermosetting resin in a synthetic fiber matrix, e. g., Ultra*compX UC-200, made by Tri-Star Plastics Corp. of Shrewsbury, Massachusetts has been found to meet these requirements. However, other suitable materials may be substituted as desired.

The handle end 104 may be equipped with a removable (e. g., conventionally threaded) cap 108 for accessing electrical storage cells (batteries) and/or other internal componentry. A lanyard 110 or the like may be secured to the device 100 through a retaining slot 111 in the handle end cap 108, if so desired, generally as shown in Fig. 7 of the drawings. A separate removable cover or guard 112 may be provided to cover the two electrical stunning electrodes 114 and 116 which extend from the discharge end 106 of the device 100. Preferably, at least the cap 108 is provided with seals or other suitable means to provide a waterproof fit. The cover or guard 112 is preferably configured to have a frictional fit over both the electrical discharge end 106 and the handle end cap 108 so it may be stored over the handle end cap 108 when the lanyard 110 is not installed, generally as shown in Fig. 6 of the drawings.

A slightly larger diameter switch housing portion 118 is provided between the handgrip and battery housing portion 120 and the impact portion 122 of the device 100. The switch housing 118 is formed integrally with the majority of the tube structure 102, and contains a light switch 124 for activating a high intensity light 126 which projects radially from the side wall of the tube 102, specifically from the switch housing 118 adjacent the light switch 124. The light switch 124 is preferably a normally off, momentary contact switch, with a resilient, waterproof protective cover thereover. The light 126 preferably comprises a high intensity or"super bright"white light emitting diode, in order to provide the desired durability and reliability for the present device 100. However, alternative lighting principles may be used, if so desired.

Whichever type of lighting is used, it is important that the light 126 be of sufficient intensity as to momentarily incapacitate the vision of a person at whom the light is aimed, particularly in a darker environment where the person's eyes have become dark adapted to at least some extent.

The area of the tube 102 in which the light 126 is installed, includes a rotating cylindrical collar or bezel 128 installed thereon. (The collar 128 is illustrated in place on the device 100 in Fig. 5, but is removed in Figs. 6 and 7 for clarity in the drawings. ) The collar 128 includes a plurality of differently

colored lenses 130 in a circumferential array, along with an open port or passage 132. The collar 128 is preferably formed of a somewhat flexible material, and may include one or more inward projections or the like (not shown) which engage corresponding slots 134 (shown in Figs. 6 and 7) in the tubular housing 102. Flexing the collar 128 releases the projections from the slots to allow the collar 128 to be rotated to position any one of the lenses 130 or the opening 132 over the light 126, as desired.

The opposite side of the tubular housing 102 contains another pushbutton switch 136 (shown in Figs. 6 and 7), which activates the electrical discharge when pushed and held. The electronic componentry for creating the high voltage discharge across the points 114 and 116 is contained within the hollow tubular structure 102, and is shown generally inthe schematic drawing of Fig. 8. Most of the internal electrical components of the present invention are quite robust and have very long lives. However, it is anticipated that at least one component (in addition to the batteries, which are accessible via the end cap 108) may require replacement after some relatively long period of time. The present defense device utilizes a spark gap device 13 8 to intensify the spark emission, shown in Fig. 7 ofthe drawings. While the specific spark gap device 138 utilized in the development of the present invention has proven to have an extremely long life span, it still may need replacement from time to time. The present personal defense device provides for this by means of a removable spark gap cap or cover 140, which is normally secured in place over the spark gap access port 142. The spark gap 138 and its access port 142 and cover or cap 140 are normally located beneath the rotatable collar 128, but rotation of the collar 128 to align the open port 132 with the spark gap cap 140 provides access to the cap 140 and the underlying spark gap device 13 8. A spare spark gap device 13 8a may be stored within the end cover or guard 112, as shown in Fig. 6 of the drawings.

A number of different electrical or electronic circuits may be used to provide the voltage step-up required to provide the desired high voltage to the two electrodes 114 and 116 from the batteries contained within the tube 102. Older technology may make use of vibrator points to develop the alternating (actually pulsating dc) current required to drive the transformers to step up the voltage to the level desired. The present invention may make use of such mechanical point systems, but preferably utilizes conventional solid state oscillator circuitry to produce the variable voltage required to drive a step-up

transformer to arrive at the proper voltage. Any such systems are conventional, and may be incorporated herein.

Fig. 8 provides a schematic diagram of an exemplary electrical system which may be used to power the electrical discharge system of the present invention. A pulse width modulator integrated circuit (PWM IC) 142 receives electrical power from one or more conventional electrical storage batteries when the electrical discharge power switch 136 (Figs. 6 and 7) is pushed on. Pulsed electrical power is transmitted to a pair of field effect transistors (FET) 144a and 144b, wired in parallel. This provides redundancy and reliability for the system, and reduces the demands upon each transistor 144a or 144b when both are operating normally. Electrical current is then passed to a pair of storage capacitors 146a and 146b, again wired in parallel in the system. The capacitors 146a and 146b discharge their stored energy to the replaceable spark gap device 138, which discharges the electrical energy to an output transformer 148. At least one bank of capacitors 150 (multiple banks may be provided in parallel, if so desired) receives the energy from the transformer 148 and passes that high voltage electrical energy to the external discharge points 114 and 116, where the alternating difference in potential produces a spark between the two electrodes 114 and 116.

The present personal defense device 100 is a multi-purpose tool, and is useful as an impact weapon (baton, club, etc. ) as well as an electrical stunning device and light, as noted further above. Figs.

5 through 7 illustrate the external configuration ofthe present device 100 for use as an impact weapon.

At least one (and preferably a series of) blade installation channels 152 are formed in the wall 107 of the tube 102, and extend from a point adjacent the electrical discharge end 106 of the device toward the opposite handle end 108, terminating near the light 126 and its lens collar 128. The channels 152 include a series of fastener holes 154, having hard threaded inserts therein for removably and repeatedly accepting a series of screws 156 (shown in Fig. 7) or the like. A corresponding number of shallow metal blades 158 are provided, with the blades having a relatively blunt side which fits closely within the channels 152. The blades 158 each have an opposite sharpened edge 160 and a series of fastener holes 162 therethrough, with the blade fastener holes 162 aligning with the channel holes 154 for securing the blades 158 removably to the tube 102.

The blades 158 are preferably formed of corrosion resistant steel, for toughness, durability, and ease of maintenance. Other materials may be used as desired. The cutting edge 160 of each blade 158 is relatively shallow and widely angled, but sharp. The obj ect of the blades 15 8 is not to inflict serious arterial bleeding through a deep cut, but rather to break the skin of an assailant to produce some bleeding as a secondary effect while primarily inflicting a certain amount of pain, in order to distract and slow an assailant. Blade guards may be provided, as in the first embodiment.

Fig. 7 also illustrates other accessories or components which may be provided with the present personal defense device 100. For example, a conventional belt clip 164 may be provided, with conventional belt loops 166 for passing a belt therethrough to secure the clip 164 to the person. The opposite side of the clip 164 has a conventional"keyhole"type retainer therein, for removably securing a stud or button 168 thereto. The belt clip mounting stud 168 is immovably affixed to the side of the tube 102, and extends generally radially therefrom.

Another accessory which may be provided for the present personal defense device, is a guard or sleeve 170 which may be removably secured over the impact portion containing the blade channels 152.

The protective sleeve 170 serves to soften the impact of the device, and may be applied to the device for training exercises or other purposes as desired. The edges of the sleeve 170 secure together conventionally, e. g. using Velcro or other suitable means as desired.

At times it may be desirable for the person using the present personal defense device 100, to maintain some distance between himself or herself and the subj ect person being handled. An example of such a situation is the prison environment, where it is not desirable to approach some prisoners too closely.

Rather than providing the potential opportunity for a prisoner to gain control of the present device, an accessory may be provided which permits the remote application of an electrical shock to the subject if necessary. Fig. 7 illustrates this accessory, comprising an extension cap 172 which removably secures to the electrical discharge end 106 and electrodes 114 and 116 of the device 100. The cap 172 includes a pair of conventional electrical contacts therein (not shown), which communicate electrically with the respective electrodes 114 and 116. The electrical contacts pass electrical current from the two electrodes

114 and 116, to a pair of high voltage leads 174 and 176. These leads 174 and 176 may be formed to have any practicable length, but are preferably from a few to several feet long. The leads 174 and 176 must be constructed to handle relatively high voltages, on the order of fifty thousand volts. Conventional automotive ignition wiring is capable of such performance, and such wiring, or similar wiring, may be used for the leads 174 and 176 for the present invention. Such wiring is relatively stiff, but may be formed in a natural coil for storage and extended as necessary for use.

The two leads 174 and 176 terminate in a body attachment strap 178, which attaches around the wrist or other portion of the body of the subject to be controlled. Conventional Velcro@ or other closure means may be used to secure the strap 178 to the person. The strap 178 contains a pair of electrical contacts, respectively 180 and 182, which communicate electrically with the respective electrodes 114 and 116 by means of the two extension leads 174 and 176. Using this extension accessory, a controlling person may administer a high voltage shock to the subject from some distance away in the event the subject becomes unruly, without endangering himself or herself by closely approaching the subject.

In conclusion, the present personal defense device in its various embodiments provides a significant advance in personal defense technology for law enforcement officers and others who have need to confront aggressive persons with physical force. The present device combines features of an electrical stun device, <BR> <BR> an impact device (baton, etc. ), an edged weapon by means of its optional shallow blades, and a light source for illumination, signaling, or momentarily visually incapacitating a person, in a single device. This greatly simplifies the carriage of equipment by law enforcement personnel, eliminating the need for a separate electrical stunning device along with a flashlight and baton.

Having a single, versatile tool or piece of equipment to handle all of the above functions, greatly facilitates the reactions of the officer in a hazardous situation, as he or she need not make a decision as to which tool or equipment to access, and then reach for that specific item of equipment. The present defense device provides all the equipment a law enforcement officer is likely to require, except a firearm, in a single device.

The use of dual, redundant, flex electrical circuitry in at least one embodiment of the present device provides a significant improvement in reliability for such devices, and enables the present defense device to be utilized as an impact or edged weapon where it is subject to considerable shock forces, without risk of damage to internal components. Preferably, mechanical connectors are used to secure electrical components to one another, in order to avoid potential problems with solder joints and the like becoming brittle and separating due to flexing. The present personal defense device thus provides all of the deterrent means which would normally be desired by a law enforcement officer in hand to hand situations in a single device, which will find great favor among law enforcement officers and others who have need of such versatility in a single device.

It is to be understood that the present invention is not limited to the embodiments described above, but encompasses any and all embodiments within the scope of the following claims.