Field of the Invention

The invention relates to security devices. The invention has particular applications in the field of theft prevention for moveable equipment, especially where such equipment is readily portable.

Background to the Invention

Security devices in the form of protection devices for property commonly consist of a large and heavy lock device, such as a heavy-duty chain or 'D-lock'. These locking means are heavy and can be difficult to transport without a bag or other suitable carrying means. This makes cycling, for example, a dangerous task, as it provides the rider with an increased weighting on one side, or requires them to control the handlebars with one hand while the other carries the locking means.

Other forms of protection devices include those of tracking chips. These chips emit a location to a secondary device so that a user can track their property. These chips, however, are easily removed due to the tendency to attach them by cable tie, glue or merely double-sided tape. The chips are also commonly placed below the seat, or within the seat post when used with a bicycle, as these are the locations secure enough to maintain the chips placement on the bicycle. However, these chips do not produce an immediate alarm that notifies an opportunist that others have been notified of an attempted theft, and so although an owner may be able to track down the stolen item, they are nevertheless deprived of the item which it is being recovered.

Furthermore, devices which emit an audible alarm are generally either easily removed, or easily destroyed. These devices, due to their bulky nature, do not contain a secondary barrier to attack, and so are more easily destroyed. Theft of skis, snowboards, surfboards and other sporting equipment is common due to their easily portable nature. Due, in part, to the flat nature of the equipment, there are limited options when looking to protect them when a user takes the equipment out of the home. This can lead to the user leaving the equipment at home, or in inconvenient locations as it is difficult to chain up, or lock to a securing means.

Current methods that include means to bolt equipment to a suitable anchor device can be time-consuming as it is often difficult to find a suitable means to which to attach a snow board or surfboard. The swapping of skis with a friend so as to create a deterrent to theft by providing mismatched skis is a common practice. However, for those who use snowboards, or surf boards, this is obviously not an option.

The current invention aims to overcome these limitations to provide a convenient security device for readily available articles such as the sporting equipment described above.

Summary of the Invention

According to a first broad aspect of the invention, there is provided a security device, the device comprising an anchor element securable to an object to be protected,

the device further comprising a body element releasably securable by a securing assembly, housed in the body element to the anchor element, the securing assembly comprising one or more securing arms movable between a first release position and a second clamping position to clamp the body and the anchor element together, a first actuator operably connected to the or each securing arm, to move the or each securing arm from said first position to the second position, a second actuator to move the or each securing arm from the second to the first position. The device provides a lightweight and durable means of protecting easily transportable items, without unduly affecting the function of said items.

Preferably, the security device includes a securing arm in the second position which extends through an aperture in the anchor element. The structure allows the security device to be provided in two parts, releasably securable from one another, to allow the object being secured to be used without the entire device being in place.

Preferably, the securing arm includes a pivot member having a pivot axis about which the arm pivots to move between the first and second positions and to reduce the risk of malfunction.

Optionally, the pivot member is a cylindrical bar for ease of manufacture and function.

Preferably, the device includes a drive means to drive a securing arm from the first to the second position, and further preferably, the drive means is an electric motor. The drive means facitlitates operation of the securing means, and enables, in some embodiments remote operation of the device.

Preferably, the device includes a processor linked to a remote transmission device, to receive a signal and activate the motor. The device can therefore be operated remotely.

Preferably, the first actuator comprises a cam member having one or more cam surfaces, the or each cam surface engaging a corresponding cam surface of a securing arm to pivot the securing arm about the pivot axis. Further preferably, the cam member is generally disc shaped. Yet further preferably, the cam member is drivingly connected to a drive plate. Still yet further preferably, the drive plate is coupled to the drive means by inter- engaging cogs.

Conveniently, the second actuator is a resilient spring engaging a securing arm and biased to move a securing arm to the first position. Further conveniently the spring comprises one or more spring arms engaging the securing arm. The risk of not being able to remove part or all of the security device is thereby reduced.

Preferably, the body element includes a surrounding outer casing. Further preferably, the casing has a geodesic structure.

Conveniently, the security device includes an audible alarm to alert people in the vicinity.

Conveniently, the security device includes a visual alarm to alert people in the vicinity.

Preferably, the security device includes a GPS device and antenna to enable the device to be found more easily following a theft.

Preferably, the security device includes at least one LED strobe light to alert people in the vicinity.

Preferably, the security device includes a USB charging socket.

In a second broad aspect of the invention, there is provided a security device, the device comprising an anchor element securable to an object to be protected, the device further comprising a body element releasably securable by a securing assembly, housed in the body element to the anchor element, the securing assembly comprising one or more securing arms movable between a first release position and a second clamping position to clamp the body and the anchor element together, wherein said body element comprises multiple shells. Preferably, the multiple shells comprise respective first and second domes.

Preferably, the first and second domes are spaced one from another.

In a third broad aspect of the invention, there is provided a security device, the device comprising an anchor element securable to an object to be protected, the device further comprising a body element releasably securable by a securing assembly, housed in the body element to the anchor element, the securing assembly comprising one or more securing arms movable between a first release position and a second clamping position to clamp the body and the anchor element together, wherein the body element comprises a geodesic shell. Preferably, the geodesic pattern of the shell is formed on its outer surface.

Brief Description of the Figures The invention is now described with reference to and as illustrated by the accompanying drawings which show by way of example only, one embodiment of a security device. In the drawings:

Figure 1 is a perspective view of a first embodiment of a device;

Figure 2 is an internal perspective view of a first embodiment of a device with the outer dome removed;

Figure 3 is a further internal perspective view of a first embodiment of a device showing the battery and battery housing;

Figure 4 is a further internal perspective view of a first embodiment of a device showing the battery housing;

Figure 5 is a further internal perspective view of a first embodiment of a device showing the locking mechanism;

Figure 6 is a perspective view of a first embodiment of a device from beneath of the locking elements;

Figure 7 is a side view of a first embodiment of an anchor element;

Figure 8 is a sectional view through the first embodiment of a device;

Figure 9 is a further sectional view through the first embodiment of a device;

Figure 10 is a perspective view of a second embodiment of a device; Figure 11 is a is an internal perspective view of a second embodiment of a device with the outer dome removed;

Figure 12 is a further internal perspective view of a second embodiment of a device showing the inner electrical workings;

Figure 13 is a perspective view of a second embodiment of a device from beneath of the locking elements;

Figure 14 is a top view of a second embodiment of a fixing plate; and

Figure 15 is a cross-sectional side view of a second embodiment of a device. Description of the Embodiments

The following description makes reference to a security device securable to an object to be protected. By security device we mean an at least partially portable device which can be detachably secured to a device which the user seeks to protect. Furthermore, any reference to the term clamp is intended to mean, secured such that it cannot be easily removed without utilising the device's unlocking procedure.

Figure 1 is a perspective view of a section of a security device 1. The device 1 comprising a base plate 7 and a top dome 5. Located on the top dome 5 is a dome fascia plate 9, wherein the fascia plate 9 extends through a top portion of the dome 5. The fascia plate 9 comprises at least one fascia arm 6: the fascia arm 6 extending from the fascia plate 9 onto the top portion of the top dome 5. The fascia arms 6 extend over at least one transparent panel 3. The transparent panel 3, in use, allows the transmission of light from within the device 1. The dome 5 has, what is termed herein, as a geodesic form in that the dome 5 is comprised of a tessellation of triangles, preferably equilateral triangles. The particular shape makes the surface of the dome 5 difficult to grip but also allows any force applied to the device 1 to be spread out across the dome 5, thereby minimising the effect of the force on the device 1. However, a dome having a spherical surface can also be utilised where desired.

Figure 2 is an elevated perspective view of the security device 1, wherein the top dome 5 has been removed. An inner dome 51 is displayed. The inner dome 51 is constructed so as to be positioned within the top dome 5. The inner dome 51 is ideally constructed from a transparent polycarbonate material. The polycarbonate material allows the transmission of light from within the inner dome 51, but also imparts strength to the dome 51. Within the region contained within the top portion of the inner dome 51, are five high brightness LED strobes (not illustrated), and a GPS/GMS antenna (not illustrated). For the avoidance of doubt, a number of strobe lights other than 5 can be used, depending on the use, cost etc. of the overall design. Fewer light sources can be advantageous in requiring less power to operate. In addition, lighting patterns other than those which provide a strobe effect can be utilised. The dome 51 is fixed through a base plate attachment 50, to the base plate 7 by fasten screws 53, which are positioned within screw receiving recesses 58. The inner dome 51 structure comprises receiving nuts 60 for receiving fastening screws 59 for fastening an access port cover 55. The access port cover 55 is further maintained in position by a series of support wall 57 portions, extending outwardly from the inner dome 51 outer surface. The layered design of the device, comprising top dome 5 and inner dome 51 provides greater resistance against impact, thermal attack and electric means. The multi-layered approach increases the number of barriers that need to be overcome to defeat the device. The multiple layers protect the internal components of the device 1. This enables the device 1 to transmit positional data uploads throughout the duration of an attack, and increase the time and information available to a user to reach the location of the device 1.

A GPS/GSM antenna (not illustrated) is located within the upper portion of the region between the inner dome 51 walls so as to provide a good quality connection to cell towers and positioning satellites. Bluetooth (RTM) connection between the device 1 and a user's mobile communication device provides the user with direct control over the device 1, which can be encoded with specific biometrics.

The device 1 provides real time GPS position data via GSM connectivity. This allows a user to track the location of the device 1, and consequently also the object to which the device 1 is attached. Where the device 1 sensors have been activated, the device 1 transmits a communication via GSM, or Bluetooth (RTM) to the user's mobile communication device.

The audible alarm can be triggered to emit a loud audible notification that the device has been moved. The audible alarm can be coupled to a speaker, which speaker also enables the user of the device to audibly communicate with the area around the device, typically via a user's communication device. The security device can include a camera, again accessible to and also controllable via the user's communication device, through which images or video recordings can be made and which allow a user to see what is happening to the device and tailor any audio output from the security device. This alarm can be chosen by the user on the mobile communication device. A high brightness visual alarm is emitted by the LED lights in the device, which are visible externally through the transparent panel 3. The flashing of the LED lights signifies that the alarm has been activated. The alarm can be deactivated by the user through the computer program on their mobile communication device. In a preferred embodiment, within the top region of the portion between the walls of the inner dome 51 is a light sensor (not illustrated). The light sensor can be used to detect the current ambient light, and is used to detect changes in the light that will result from movement of the device. Alterations in the light will trigger the alarm on the device 1 to notify the user that the device 1 is being moved.

In an alternative embodiment, a smoke source and release means therefor can be included to aid in deterring a thief or in identifying the location of the device.

Figure 3 is an elevational side view of the security device 1, in which the top dome 5 and inner dome 51 have been removed to allow further internal features of the device 1 to be seen. The base plate attachment 50, in use, supports a device battery 31. Said battery 31 is maintained in position by contact fit between a series of battery support walls 35. The battery 31 is supported towards one side of the base plate attachment 50, this positioning allows for the battery 31 to be positioned within the inner dome 51 when installed. At least two fixing bolts 37 are positioned toward the perimeter edge of the base plate attachment 50. Said fixing bolts 37, in use, receive the inner dome fastening screws 53. The battery is advantageously rechargeable. The device 1 can include a charging point, for example comprising a USB cable having 2 pins insertable into the face of the device 1. Additionally, or alternatively, the device can include a solar panel to aid in maintaining battery charge.

Figure 4 is an elevational side view of figure 3 of the security device 1, wherein the battery 31 has been removed. The base plate attachment screws 73 are revealed in their in use position between the battery support walls 35. In figure 4, the motor aperture 71 of the base plate attachment 50 is visibly displayed. The aperture 71 allows for a larger motor 1 1 to be installed within the device 1, by enabling the motor 1 1 to extend from the base plate through the base plate attachment 50 and into the region between the inner dome 51 walls.

Figure 5 is an elevational side view of the device 1, wherein the domes 5 and 51, and base plate attachment 50 have been removed, to reveal the base plate 7. The base plate 7 includes a series of locking arm apertures 21, positioned between lock arm support blocks 23. Locking arms 19 are installed onto the support blocks 23 and extend through the apertures 21. The locking arms 19 include a pivot bar 13 about which a locking arm 19 rotates. The locking arm 19 lower portions, in use, are constructed to interact with the fixing plate 101 (see Figure 7). The locking arms 19 are preferably formed of a high carbon steel. The construction of the locking arms 19 provides a durable connection between the device 1 and the fixing plate 101. The durable connection acts to resist attempts to pry the device 1 from the fixing plate 101 that is attached to the object the user aims to protect. To remove the device 1 from the fixing plate 101, the user controls the locking arm 19 movement via an encrypted secure program on their mobile communication device.

The motor 11 can act to rotate the cog 18 in both the anti-clockwise and clockwise directions. In an alternative embodiment, the motor acts only to actively drive the locking arms into position to secure the dome 5 to the base plate 7. The spring 91 then acts to provide the restoring force to move the locking arm 19 to the release position, with the motor 11 being placed in 'neutral'. The teeth of the cog 18 provide a complementary fit into the cog teeth 16 of cam drive plate 15. The cam drive plate 15 is secured in driving connection to a cam ramp 25, and wherein the rotation of the drive cog 18 acts to impart a rotational drive force to the cam drive plate 15. The cam ramp 25 has, in the illustrated embodiment, 5 cam surfaces 22: one cam surface 22 for each locking arm 19. Rotation of the cam surfaces 22 via the motor 11, causes a cam surface 22 to engage a locking arm 19 to cause the respective locking arm 19 to rotate between a clamping and non-clamping position with respect to the apertures 102 (see below).

Activation of the motor 11 rotates the cog 18, which itself rotates the cam drive plate 15. The directional movement of the cam drive plate 15 rotates the cam ramp 25, which in turn shifts the diverging end of an outer portion towards the top portion of the locking arm 19. This results in the top portion of the locking arm 19 pivoting towards the outer edge of the base plate 7, resulting in the lower portion of the locking arm pivoting toward the centre of the base plate 7. This locks the device 1 onto the fixing plate 101. Activation of the motor 11 to rotate in the opposite direction, the rotation of the cam drive 15 and cam ramp 25 results in the converging portions of the cam ramp 25 perimeter sliding along the locking arm 19 top portion and pivoting the locking arm 19 lower portion toward the outer edge of the base plate 7.

The cam ramp 25 at its central portion includes two plate apertures 24. These apertures 24 are constructed to allow fixing bolt 17 extensions to extend through the cam ramp 25. Moreover, the apertures 24 act to limit the angle through which the cam ramp 25 can rotate. The fixing bolts 17 in use, receiving the base plate attachments screws 73.

As shown in figure 5, each individual lock arm 19 top portion has associated therewith an arm spring 91. The arm spring 91 is anchored against an anchoring wall 93 that forms a perimeter around the locking arms 19. The spring 91 passes through spring-receiving recesses in the anchoring wall 93 which provides a point against which the spring 91 can pivot the locking arm 19 closed. The spring 91 acts to provide resistance for the locking arm 19 against the cam surface 22. Without the spring 91, the locking arm 19 top portion could be pivoted away from the cam surface 22 and subsequently render the role of the cam surface 22 as ineffective. The spring 91 force against the cam surface 22 ensures the locking arm 19 is pivoted between locked and unlocked positions by rotation of the cam ramp 25. Figure 6 shows an upward elevated view of the base plate 7. The locking arms 19 are displayed in their closed (locked) position, pivoted toward the centre of the base plate 7. In use, the arms 19 clamp and lock on to a fixing plate 101 shown in figure 7, in that the fingers 19a extend through the apertures 102. The base plate 7 comprises a series of top dome 5 attachment screw apertures 61 toward the outer perimeter of the base plate 7 which allows the dome 5 and plate 7 to be secured together by use of screw 61a. Between each of the apertures 61 is an aeration vent 63 for allowing the flow of air into the device 1 to prevent overheating of the components contained therein.

A fixing plate 101, as displayed in figure 7 is intended to be securely fixed to the object to be protected. The fixing plate 101 comprises a connection plate 106 and a base 107. The connection plate 106 can be constructed from a single drop forged piece of stainless steel. The connection plate 106 comprises a series of locking arm 19 receiving apertures 102. The connection plate has a series of screw receiving apertures 103, said apertures 103 receiving screws 104 for securing the fixing plate 101 through the base 107, to the object to be protected. In an alternative embodiment, the fixing plate 101 is secured to the object by means of an adhesive known in the art.

The fixing plate 101, as illustrated, is constructed so as to provide a strong steel connecting portion, in direct link with the screws 104 that will attach the fixing plate 101 to an object. By directly attaching the screws 104 from the connection plate 106 to the object, the device 1 maintains a smaller number of connecting components. This reduced number of components provides the computer program with less to monitor to determine that a potential theft is taking place, whether this is through monitoring of the GPS location, or through attempted detachment of the device 1 from the fixing plate 101.

In an alternative embodiment, the base of the fixing plate 101 comprises a circular attachment means. The circular attachment means can be attached to the frame tubing on a bicycle. The circular attachment can be provided in a range of sizes.

Figure 8 is a cross-sectional side view of the device 1 connected to the fixing plate 101. The cross-sectional side view displays the LED 71 and GPS antenna 72 within the top region between the top portion of the inner dome 51 walls. Each of these components is fixed to fittings within the inner dome 51 structure, and when the inner dome 51 is in position in the assembled device 1, are maintained above the battery 31. A dome connector 73 maintains the position of the top dome 5 about the top portion of the inner dome 51. This arrangement is constructed to act to spread a load, should the device 1 be attacked. By spreading the force of an attack, the top dome 5 is designed to withstand attacks with reduced likelihood of a crack, or split, forming in the structure. The base plate 7 is shown in its in-use position, where the curved base of the base plate 7 meets the curved surface of the fixing plate 101 connection plate 106. By forming a complementary fit, and reducing the gap between the base plate 7 and the fixing plate 101, an opportunist thief or ne'er do well is presented with less means into which a prying means can be inserted, to overcome the locking force of the locking arms 19.

Figure 9 is a further cross-sectional side view of the device 1. Wherein figure 9 displays the motor 11 extending from the base plate 7 into the inner dome 51 to be positioned next to the battery 31. The access port 55 of the inner dome 51 is visible within the top dome 5 and spaced from the top dome 5 to reduce the likelihood of damage from an attempted attack. The attachment screw recess 61 provides protection for the top dome 5 to base 7 connection point by angling the recess downward. This prevents an opportunist from inserting a screw removing device into the recess, as the device 1 lies close to the surface of the object to which it seeks to protect. This close proximity of the device 1 to the object is a further method of preventing an opportunist from gaining a possible point into which they can use a tool to pry the device 1 away from the object.

The device 1 requires a considerable force to be removed from the object it is protecting. Therefore, as a further means of security, this prevents an opportunist attack, by providing that the removal of the device without the deactivation means of the operating programme, would severely damage the object, and subsequently reduce the value of the object.

The device 1 alarming system can be pre-set by the user through the program on their mobile communication device. The device 1 can be programmed to set off the audible and visual alarms, as well as notify the user via their mobile communication device that the device 1 has been compromised. The user can select a default range for the arming of the device, which determines the range of motion through setting the motion detector to low, medium or high sensitivity with regards to detection of movement of the device 1. The user can determine how far the device 1 can move before the alarm is activated. For example, if on a shared rack, the user may allow a movement of up to 1 metre, to allow for rack slips, or shifting of the equipment by others when racking or un-racking their equipment. The device 1 can be locked to the fixing plate 101, without arming the device 1. This allows a user to keep the device 1 on the object they wish to protect when using or transporting their equipment. To arm the device the user must select to do so through their mobile communication device. In respect of disarming the device, the user can do so through their mobile communication device. The device 1 can then be retained on the fixing plate 101, or removed by the user, dependant on their preference.

Figure 10 is a perspective view of a second embodiment of a security device 200. The security device 200 incorporates all of the features as exemplified in the embodiment of device 1 of Figure 1, with the difference of an alternative clamping mechanism. In the current embodiment the dome 210 is comprised of a tessellation of equilateral triangles. In an alternative embodiment, the dome 210 comprises a geodesic form comprised of a tessellation of non-continuous geometric shapes, such as; squares, pentagons, hexagons, heptagons, octagons, nonagons or decagons.

Figure 11 is a perspective view of the embodiment of a security device 200 with the dome 210 removed. The device 200 comprises a multiple shell arrangement, with a first shell represented by the top dome 210 and the second shell represented by a secondary inner dome 201, within the top dome 210. As with the embodiment of Figure 1, this multi- shelled configuration provides additional strength to the device and creates layers of protection that must be circumvented by any would be thief. In addition, the shells create boundaries of protection to the inner electrical workings of the device 200 from the elements, such as wind and rain. In the current embodiment, the inner dome 201 is spherical, creating inherent strength against blunt force impact on the device. At the upper portions of the inner dome 201, the device 200 incorporates transparent portions 202.

In the current embodiment, the transparent portions 202 extend from the inner dome 201 to the top dome 210 through the space therebetween. The transparent portions 202 function to transmit light from within the inner dome 201. In an embodiment, the transparent portions 202 have a prism configuration to create internal reflection of light and improve overall transmission of light from the inner dome 201 to outside of the device 200.

The inner dome 201 is secured to the base plate of the device 200 by a means known in the art, such as, bolts, catches, clips or straps. Preferably, the attachment is highly secure but can be removed to allow access to the inner workings of the device 200 when necessary.

At the apex of the inner dome 201 is a speaker 203. As in the embodiment of the device 1, the speaker acts to provide loud noises when tampered with or moved, acting to bring attention to the activities and deter any thieves. In a preferred embodiment, the speaker is a piezoelectric sounder. In an embodiment, the device 200 is configured such that there is a continuous space between the dome 210 and the inner dome 201. This space prevents forces exerted on the dome 210 from being transferred directly to the inner dome 201. Not only does the described configuration create two distinct layers of protection, but it also prevents percussive force shaking the internal electrical workings of the device 200 which may cause damage. In an embodiment, the space between the dome 210 and the inner dome 201 is filled with a foam (not shown), such as an expanding liquid spray foam. The foam acts to absorb and dissipate force exerted on the dome 201 and thereby reducing the possibility of damage to both the dome 210 and the electrical workings of the device 200. In an alternative embodiment, the space between the dome 210 and the inner dome 201 can be filled with a smart water which has its own unique forensic code. Should a determined thief manage to break through the dome 210, smart water would pour out of the device 200, coating both the item you are trying to protect and the thief. This can act as a highly beneficial tool to identify both the stolen items and the thief at a later date.

Figure 12 is a perspective view of the second embodiment of a security device 200 with the top dome 210 and inner dome 201 removed. The base plate 205 supports the battery 204 and the printed circuit board 206, which are secured to the base plate by means known in the art. A solenoid 207 is mounted in the base plate 205. The solenoid incorporates a securing arm, in this case exemplified as a pin 209 (best shown in Figure 13). The solenoid incorporates an internal spring (not shown) which causes the pin 209 to default into its locking position extending through the base plate 205. Upon activation, the solenoid 207 causes the pin 209 to detract into its not locking position, in a preferred embodiment, the solenoid is actuable wirelessly via a smartphone or similar device. In a further preferred embodiment, the wireless connection is secured from third party interaction by means known in the art. Securing screws 212 extend through the base plate 205 for securing the base plate 205 to a fixing plate 221. Figure 13 is a perspective view of the underside of the second embodiment of a security device 200. The underside of the base plate 205 incorporates an annular recess 208 with a complementary shape to the fixing plate 221. In the current embodiment, three securing screws 212 extend through the base plate 205 in a triangular arrangement. Alternatively, the base plate 205 can incorporate 4, 5 or 6 screws for securing the base plate 205 to the fixing plate 221. The pin 209 of the solenoid 207 extends from the base plate 205, where it can interact with the fixing plate 221. The device 200 incorporates bevelled edges 235 around the circumference of the base plate 205. The bevelled edges 235 remove acute angled edges which could be used to attempt to leverage the device 200 from the object it is secured to.

Figure 14 is a top view of the second embodiment of the fixing plate 221. The fixing plate has a complementary shape to the recess 208 of the base plate 205 such that the fixing plate 221 closely fits within the recess 208, in use. The fixing plate 221 incorporates a plurality of apertures 223 for housing the securing screws extending from the base plate 205. The apertures have a substantially annular portion 223a and an arcuate portion 223b which have a decreased diameter when compared to the annular portion. In the current embodiment, the fixing plate 221 incorporates three apertures 223 arranged complementary to the arrangement of securing screws in the base plate 205.

In use, as the base plate 205 and the fixing plate 221 are brought into engagement, each of the heads of the securing screws 212 enter through the annular portion 223a of the apertures 223. A rotational movement of the base plate 205 in respect to the fixing plate 221, moves each of the shanks of the securing screws 212 into the arcuate portions 223b of the respective apertures 223. Once the shanks of the securing screws 212 have entered the arcuate portions 223b of the apertures 223, the fixing plate 221 is unable to separate from the base plate 205 without first performing the reverse rotating movement of the fixing plate 221 in respect of the base plate 205. In order to prevent the rotation required to remove the fixing plate 221 from the base plate 205, the fixing plate 221 further incorporates at least 1 cavity 230 suitable for accommodating the pin 209 of the solenoid 207. The cavities 230 are arranged such that the rotational motion of the fixing plate 221 which causes the shanks of the securing screws 212 to enter the arcuate portions of the apertures 223, aligns the pin 209 with one of the cavities 230. When in alignment, the spring housed within the solenoid 207 causes the pin 209 to enter the cavity 230. When the pin 209 is within the cavity 230, the fixing plate 221 is unable to rotate respective to the base plate 205. The device 200 is therefore securely clamped to the fixing plate 221 until the solenoid is activated and the pin 209 retracted from the cavity 230. Figure 15 is a cross sectional side view of the second embodiment of a security device 200. The solenoid 207 is in its non-locking position, with the pin 209 actively retracted by activation of the solenoid 207.