CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority from and claims the benefit of U.S. Patent. Application Serial No. 14/580,515, filed December 23, 2014, which is incorporated by reference herein,

BACKGROUND

Field

The disclosed concept relates generally to electrical switching apparatus and, more particularly, circuit interrupters, such as circuit breakers. The disclosed concept also relates to electrical switching apparatus accessory components, such as. for example, shunt nip and under voltage release devices.

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Electrical switching apparatus are often equipped with accessory components such, as, for example and without limitation, shunt trip devices and under voltage release (UVR) de vices. Such devices can be employed in a variety of ways to initiate a change in status of the apparatus such as, for example, to trip open separable contacts of the apparatus in response to an electrical fault condition (e.g., without limitation, current overload, short circuit or abnormal voltage) or other external condition.

Electrical switching apparatus include, for example, circuit switching devices, circuit interrupters, such as circuit breakers, network protectors, contactors, motor starters, motor controllers, and other load controllers. Electrical switching apparatus such as circuit interrupters and, in particular, circuit breakers of the molded case variety, are well known in the art. Circuit breakers are used to protect electrical circuitry from damage due to an over- current condition, such as an overload condition or a relatively high level short circuit or fault condition. M lded case circuit breakers typically include a pair of separable contacts per phase. The separable contacts may be operated either manuall by way of a handle disposed on the outside of the case, or housing assembly , or automatically in response to an over- currert t condi lion . Some molded case circuit breakers, ibr example, employ a molded housing having two parts, a first half or front pari (e.g., a molded cover), and a second half or rear part (e.g., a molded base). The molded case is, in many instances, generally divided into channel- like internal cavities with a conductor assembly for each pole extending through each cavity. The cavities further provide a space for additional components, e.g., accessory components. When added to molded case circuit breakers, accessory components are typically placed into pockets and an connection wires associated with the accessor components are routed through slots positioned on either side or both sides of the molded case circuit breakers. For electronic trip units in molded case circuit breakers, there can also be additional wires, such as, neutral sensor wires, including ground fault alarm contacts, arc fault maintenance wires (which enable inputs and outputs), communications wires and zone selective interlock wires. The wires exiting the molded case circuit breakers through the slots are required to be rated for the maximum voltage level (i.e.. 600 V) for any application or installation. As a result, the wires are generally thick and therefore the number of wires that can pass through each of the slots provided on the sides of the molded case circuit breakers is limited. Further, additional engineering of the connection wires to the accessory components may be provided in order to satisfy pull test requirements to assure that the wires cannot be pulled out of the breaker (e.g,, by an. operator or a customer) causing an unsafe condition. In. addition, the connection wires are required to be equal in length to the longest length required for an application or installation. Thus, often times, the wires are longer than what is needed for wiring of the accessory components .

Figure 1 shows an unassembled electrical switching apparatus such as, for example, an unassembled circuit breaker 2, in accordance with the prior art. The circuit breaker 2 includes a base 4. Typically, the housing of the circuit breaker 2 includes a front portion and a rear portion or base 4 which are connected together. In Figure 1 , only the base 4 is shown and, the front portion is removed from the housing and is not shown. The base 4 is open to show a cavity and positioned within the base 4 is an accessory component 8, which has a plurality of accessory wires 10 extending therefrom. As above-described there are typically various other components positioned within the base portion of a housing for an electrical switching apparatus, which are not shown in Figure 1. In Figure 1 , three accessory wires are shown, however, it is contemplated that there may be more or less accessory wires depending on the number of accessory components and the n umber of wires associated with the particular accessory components. Multiple slots 12 ar formed within a side wail 6 of the base 4. Each of the plurality of accessory wires 10 can pass through a corresponding one of the multiple slots 12. Although, one set of multiple slots 12 is shown in Figure I, it is contemplated that another set of multiple slots can be formed within the other side wall (not shown) of the base 4, opposite the side wall 6. adapted for a plurality of accessory wires from another accessory component (not shown),

it would be advantageous for a connector assembly to be installed within the electrical switching apparatus in order to mechanicall and electrically connect the wires of an accessory component positioned in the housing to user equipment that is positioned outside of the housing. Thus, there is room for improvement in electrical switching apparatus, such as circuit breakers, and in connecting the accessory components for a molded case circuit breaker.

SUMMARY

These needs and others are met by embodiments of the disclosed concept, which are directed to accessory wiring and connectors for electrical switching apparatus, such as molded case circuit breakers.

As one aspect of the disclosed concept, a connector assembly is provided for an eiectricai switching apparatus. The electrical apparatus includes a housing having a front portion and a rear portion, the rear portion having a plurality of walls that form an inner cavit and an outer surface, and one or more accessory components enclosed by the housing. Each of the one or more accessory components includes at least one accessory connection wire having a first end and an opposite second end, the first end being coupled to the one or more accessory components. The connector assembly includes an elongated member having a first end and an opposite second end, and an elongated portion disposed there between. There are one or more connectors extending outwardly from a first surface of the elongated member and one or more apertures formed in a second surface of the elongated member opposite the first surface. The one or more connectors are adapted to engage the second end of the at least one accessory connectio wire. The one or more apertures extend horizontally through the elongated member and al gn with the one or more connectors. The one or more apertures are adapted to receive one or more wires from user equipment. The connector assembly is operable to mechanically and electrically connect the at least one accessory connection wire with the one or more user equipment wires.

The elongated member can extend through one of said plurality of wa!ls of the rear portion and be coupled to the rear portion.

The electrical switching apparatus can be a molded case circuit breaker.

The one or more accessory components can he selected from shunt trips, under- voltage releases, auxiliary contacts and bell alarm contacts.

In certain embodiments, the connector assembly further includes plug-in mate. The plug-in mate can include an extension member having a first end and an opposite second end, and an extension portion disposed there between, one or more extension connectors extending outwardly trom a first surface of the extension member and adapted to engage the corresponding one or more apertures of the elongated member of the connector assembly, and one or more extension apertures extending horizontally through the extension member and aligning with the one or more extension connectors. The one or more extension apertures adapted to receive the one o more wires from the user equipment.

The pl ug-in mate can be structured to connect to the el ongated member of the connector assembly and the extension member of the plug-in mate extends outwardly perpendicular from one of the plurality of walls of the rear portion. Alternately., the plug- in mate can have a right-angle shape.

As another aspect of the disclosed concept, an electrical switchin apparatus is provided. The electrical switching apparatus includes a housing having a front portion and a rear portion, the rear portion having a plurality of walls that form an internal cavity and an outer surface; one or more accessory components enclosed by the housing, each of the one or more accessor components including at least one connection wire having a first end and an opposite second end, the first end of the connection wire being coupled to the one or more accessory components; and at least one connector assembl being structured to extend into one of the plurality of wails of the rear portion. The connector assembly includes one or more connectors extending outwardly from a fi rst surface of die elongated member and adapted to engage the second end of the at least one ac cessor con nection wire; and one or more apertures extending horizontally through the elongated member and aligning with the one or more connectors, the one or more apertures adapted to receive one or more wires from user equipment. The connector assembly is operable to mechanically and electrically connect the at least one accessory connection wire with the one or more user equipment wires.

The connector assembly can extend into one of the plurality of walls. In certain embodiments, a first connector assembly and a second connector assembly can extend into one of the plurality of walls. In other embodiments, a first connector assembly can extend into one of the plurality of walls and a second connector assembly extends into a second, different one of the plurality of walls.

BRIEF DESCRIPTION OF THE DRAWINGS

A full understanding of the disclosed concept can be gained from the fol lowing description of the preferred embodiments when read in conjunction with the accompanying drawings in which:

Figure 1 is a schematic showing the back or rear portion of an unassembled molded case circuit breaker and slots for engaging accessor connection wires, in accordance with the prior art;

Figure 2 is a schematic showing an assembled molded case circuit breaker and stationary connector assemblies, in accordance with certain embodiments of the disclosed concept;

Figure 2A is a schematic showing an assembled molded case circuit breaker and stationary connector assemblies, in accordance with certain other embodiments of the disclosed concept;

Figure 2B is a schematic showing an assembled molded ease circuit breaker and openings for insertion of the stationary connector assemblies, in accordance with certain embodimen ts of the disclosed concept; Figure 3 is a schematic showing the back or rear portion of an unassembled molded case circuit breaker and a connector assembly for engaging accessory connection wires, in accordance with certain embodiments of the disclosed concept;

Figure 3 A is schematic showing a detail view of the stationary connector assembly shown in Figure 3, m accordance with certain embodiments of the disclosed concept;

Figure 3B is a schematic showing the stationary connector assembly of Figure 3A and further including a fast-on connector, in accordance with certain embodiments of the disclosed concept;

Figure 4 is schematic showing the assembled molded case circuit breaker and stationary connector assemblies as shown in Figure 2 and further including plug-in mates, in accordance with certain embodiments of the disclosed concept;

Figure 4A is a schematic showing the assembled molded case circuit breaker and stationary connector assemblies as shown in figure 2 and further including plug-in mates, in accordance with certain other embodiments of the disclosed concept;

Figure 4B is a schematic showing a detail view of one of the stationary connector assemblies and plug-in ates shown in Figure 4, in accordance with certain embodiments of the disclosed concept; and

Figure 4C is a schematic showing the assembled molded case circuit breaker and connector assemblies as shown in Figure 2 and further including right-angle plug-in mates, in accordance with certain embodiments of the disclosed concept.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

For purposes of illustration, embodiments of the disclosed concept will be shown and described as applied to low-voltage molded case circuit breakers, although it wil become apparent that they also could be applied to a wide variety of electrical switching apparatus (e.g., without limitation, circuit switching devices and other circuit interrupters, such as contactors, motor starters, motor controllers and other load controllers) other than low-voltage molded cas circuit breakers and other than low-voltage electrical switching apparatus, Directional phrases used herein, such as, for example, left, right, clockwise, counterclockwise,, top. bottom and derivatives thereof, relate to the orientation of the elements shown in the drawings and are not limiting upon the claims unless expressly recited therein.

As employed herein, the terms "connector" and "connector assembly" refer to any known or suitable component or assembly, respectively, that is structured to accept one or more wires, e.g.. an end of each of the one or more wires, connected to one or more accessory components located in the molded case circuit breaker.

As employed herein,, the statement that two or more parts are "coupled" together shall mean that the parts are joined togethe either directly or joined through one or more intermediate parts.

As employed herein, the term "number" shall mean one or an integer greater than one a plurality).

Figure 2 shows an assembled electrical switching apparatus such as, for example, an assembled low-voltage circuit breaker 3. in accordance with certain

embodiments of the disclosed concept. The circuit breaker 3 includes a housing 5. The housing 5 is in the form of a rectangular member. However, the particular rectangular member is not meant to be limiting and it should be understood that other types of housing members, e.g. , having various shapes and sizes, may be substituted for the housing 5. I general, the particular housing member selected can depend on the size and configuration of the circuit breaker, the switchgear and/or the other components positioned in the circuit breaker. The housing 5 can be constructed of a wide range of materials. Suitable materials include those materials that are known in the art for use in electrical switching assemblies. The housing 5 is typically made of a substantially rigid material, such as, but not limited to, molded plastic. The housing 5 includes a front portion ?, e.g., a molded cover, and a rear portion 9, e.g... a molded base. The front and rear portions 7,9 are coupled together. The rear portion 9 has an outer side wall 9a, another side wa l (not shown) positioned opposite side wall 9a, a top wall 9b, a bottom wall (not shown) positioned opposite the top wall 9b, and a back wall 9c. A. first stationary connector assembly .1 1 is positioned in the rear portion and extends through the back wall 9c. A second stationary connector assembly 13 is positioned opposite the first stationary connector assembly 1 1 m the rear portion 9 and extends through the back wall 9c. An externa! surface of each of the first and second stationary connector assemblies 1 1 ,13 is generally flush with the surface of the back wall 9c. One or more openings 14, 15 (shown in Figure 2B) may be formed in the outer back wall 9c of the rear portion 9. Each of die openi ngs 14,15 being adapted to recei ve each of the corresponding first and second stationary connector assemblies 1 1.13 therein. Although Figure 2 shows both the first and second stationary connector assemblies 1 1 ,13, it is contemplated that in certain embodiments, the low-voltage circuit breaker 3 includes only one of the two connector assemblies, e.g., only the first stationary connector assembly 1 1 or the second stationary connector assembly 13. Furthermore, although Figure 2 shows the first and the second stationary connector assemblies 1 1 ,13 positioned in the back wall 9c, it is

contemplated that one or both of the first, and second stationary connector assemblies 1 1 ,13 ma be posi tioned in the side wall 9a (as shown in Figure 2 A),

The first and second stationary connector assemblies i 1,13 can be mounted to the rear portion 9 of the housing 5 using various fastening mechanisms (not shown) that are known in the art for coupling or connecting one surface or substrate to another surface or substrate. The first and second stationary connector assemblies 1 1 ,13 can be constructed of a wide range of materials. Suitable materials include those materials thai are known in the art for use in electrical switching assemblies. For example, the first and second stationary connector assemblies 1 1 , 13 can be made of a substantially rigid material, such as, but not limited to, molded plastic, or each can be made of a less rigid and more flexible material, such as, an eiastomeric material.

Figure 2 A shows the assembled low-voltage circuit breaker 3 as shown in Figure 2 including the housing 5, front portion 7, rear portion 9, outer side wall. 9a, top wall 9b, back wall 9c and, first and second stationary connector assemblies 1 1 , 13. However, in Figure 2 A, the first and second stationary connector assemblies 1 1,13 are each positioned in an outer side wall of the rear portion 9 (instead of in the back wall 9 c as shown in Figure 2). The first stationary connector assembly 1 .1 i positioned in the outer side wall 9a and the second stationary connector assembly 1 is positioned in the outer side wail (not shown), opposite the side wall 9a. An external surface of each of the first and second stationary connector assemblies 1 1 ,13 is generally flush with the surface of each of the side walls. One or more openings (not shown) may be formed in each of the side walls to receive each of the corresponding first and second stationary connector assemblies 1 1 ,13 therein. Although Figure 2 A shows both the first and second stationary connector assemblies 1 1 ,13, it is contemplated that in certain embodiments, the low-voltage circuit breaker 3 includes only one of the two connector assemblies, e.g.. only the first stationary connector assembly 1 1 or the second stationary connector assembly 13. Furthermore, it is contemplated that in certain embodiments, the low-voltage circuit breaker 3 includes a first stationary connector assembly positioned in the back wall 9c of the housing 5 (as shown in Figure 2 ) and a second stationary connector assembly positioned in the side wall 9a of the housing 5 (as shown in Figure 2A).

Figure 2B, shows the assembled low-voltage circuit breaker 3 as shown in Figure 2 including the housing 5, front portion 7, rear portion 9, outer side wall 9a, top wall 9b. back wall 9c and, first and second, stationary connector assemblies 5 1 , 13. m addition, Figure 2B shows a first opening 14 formed in the back wall 9c of the rear portion 9 of the housing 5 and a second opening 15 formed opposite the first opening 1 in the back wall 9c of the rear portion 9 of the housin 5. Each of the first and second openings 14, 15 is adapted to receive each of the corresponding first and second stationary connector assemblies 1 1 ,13.

In certai embodiments, the circuit breaker 3 has formed therein: one or more slots (e.g., slots 12 as shown in Figure 1 ) and the one or more slots, e.g., pre-formed slots, can provide for each of the openings 14, 15 for receiving and mounting the first and second stationary connector assemblies 1 1,13.

Figure 3 shows an electrical switching apparatus such as, for example, the low-voltage circuit breaker 3 as shown in Figure 2. However, in Figure 2, the circuit breaker 3 is show in an assembled view and i Figure 3, the circuit breaker 3 i shown in an unassembled view. As previously described herein, typically (as shown in Figure 2), the housing 5 includes a front portion 7 and a rear portion 9 which are connected together. In Figure 3. the unassembled view includes only the open rear portion 9, e.g.. molded base, having the side wall 9a, another side wall 9d positioned opposite the side wall 9a, and end wall s, which form an internal ca vi ty 27. Posi tioned within the internal ca vi ty 27 of the housing 5 is the accessory component 8 having the plurality of accessory wires 10 extending therefrom. It is understood that there may e more than one accessory component 8 enclosed in the internal cavity 27 of the housing 5 and therefore, more than one plurality of accessory wires It). The accessory component 8 can be selected from a variety of electrical switching apparatus accessories known in the art, such as, but not limited to, shunt trips, under-voltage releases, auxiliary contacts and bell alarm contacts. There are various other components that are typically positioned within the molded base portion of a housing for an electrical switching apparatus, which are not shown in the internal cavity 27 in Figure 3. The first stationary connector assembly 11 is positioned within the side wall 9a of the rear portion 9 of the housing 5. The stationary connector assembly 1 1 penetrates the side wall 9a and extends there through to the internal cavity 27. An external surface of the first stationary connector assembly 1 1 is generally flush with the surface of the side wall 9a. Although Figure 3 shows only one accessory component 8 and one stationary connector assembly 1 1 , it is

contemplated that another accessor component having another pl urality of accessory wires may be connected to another stationary connector assembly positioned in the other side wall 9d opposite the side wall 9a,

Figure 3 A shows a detail of the first stationary connector assembly 1 1 shown in Figure 3. As shown in Figure 3 A. the stationary connector assembly 1 1 includes a first end 31 , an opposite second end 33, and an elongated portion 35 disposed there between. The elongated portion 35 includes a plurality of connectors 43 and corresponding connection apertures 34, which extend horizontally through the interior of the elongated portion 35.

Each of the plurality of connectors 43 is adapted to engage, e.g.. receive, each of the plurality of accessory wires 10, e.g., an end portion of each of the plurality of accessory wires 10 (shown in Figure 3). As shown in Figure 3 A, there are three connection apertures 34 and three connectors 43, however, it is understood that the number of apertures and connectors can be greater or less than three.

Figure 3B shows the stationary connector assembly 1 1 as shown in Figure A including the pluralit of connection apertures 34 and the plurality of connectors 43. In addition. Figure 3B show a slip on fast-on connector 49 which connects one of the plurality of accessory wires 10 in the housing 5 to one of the plurality of connectors 43. Figure 4 shows the assembled low-voltage circuit breaker 3 as shown in

Figure 2 including the housing 5, front portion 7, rear portion , outer side wall 9a, top wall 9b, back wall 9c and, first and second stationary connector assemblies 1 1 , 13. In addition, Figure 4 includes a first plug-in mate 40, which is coupled to the first stationary connector assembly 1 1 and a second plug-in mate 41 . which is coupled to the second stationary connector assembly 13. n Figure 2, the external surface of each of the first and second stationary connector assemblies 1 1 , 13 is generally flush with the surface of the back wall 9c of the rear portion 9. Whereas, in Figure 4, the first and second plug-in mates 40,41 are structured to connect or couple to the exterior surface of each of the corresponding first and second stationary connector assemblies 1 1 ,13 and to extend outwardly a distance beyond the sur face of the back wall 9c and perpendi cular to the surface of the back wall 9c. Si milar to the first and second stationary connector assemblies 1 1 , 13, the first and second plug-in mates 40.4 ! include an elongated portion having a pl urality of extension apertures 38,39, respectively, formed therein. Although Figure 4 shows both the first and second plug-in mates 40,41 , it is contemplated that in alternate embodiments one or both of the fu st and second plug-in mates 40,41 can be included.

Figure 4 A shows th assembled low- vol age circuit breaker 3 as shown in Figure 4 including the housing 5. front portion 7, rear portion 9. outer side wal l 9a, top wall 9b, back wall 9c, first and second stationary connector assemblies 1 1 , 13, first and second plug-in mates 40,41 , which are each coupled to the corresponding first and second stationary connector assembiies 1 1 , 13, and plurality of extensions apertures 38,39. Whereas, in Figure 4, the stationary connector assemblies 1 1 , 13 are inserted into the back wall 9c of the rear portion 9 of the housing 5, in Figure 4A, the stationary connector assemblies 1 1 , 13 are each inserted into the side wall 9a and other side wail (not shown) opposite 9a, of the rea portion 9 of the housin 5. The first and second plug-in mates 40,41 are structured to connect or couple to the exterior surface of each of the corresponding first and second stationary connector assembiies 1 1 , 13 and to extend outwardly a distance perpendicular and beyond the surface of the side wall 9a and the other side wall opposite 9a, respectively. Although Figure 4A shows both the first and second plug-in mates 40,41 , it is contemplated that in alternate embodiments one or both of the first and second plug-in mates 40,41 can be included. Figure 4B shows a detail of the first stationary connector assembly 1 1 and the first plug-i mate 40 as shown in Figures 4 and 4 A. In Figure 4B, the plurality of accessory wires 10 are connected to the plurality of connectors 43. Each of the plurality of connectors 43 is adapted to engage, e.g., recei ve, eac of the plurality of accessory wires 10, e.g., an end portion of each of die plarality of accessory wires 10. In addition. Figure 4B shows the first plug-in mate 40 having a plurality of mate connectors 36 and a plurality of user equipment wires 48 extending and engaging into the plurality of extension apertures 38, One end of the user equipment wires 48 are connected to any apparatus (not shown) that stimulates or uses the accessory component 8 positioned in the housing 5 (as shown in Figure 3). The apparatus (not shown) can include alarms and programmable logic equipment. The other end of the user equipment wires 48, opposite the one end, are connected to and/or engaged with the plurality of accessory wires 10. As shown in Figure 4B, th is ot her end of the user equipment, wires 48 are received within the plurality of extension apertures 38, which extend

horizontally through the plug-in mate 40, and engage with the plurality of mate connectors 36, which are recei ved in the connection apertures 34 of the connector assembly 1 1 , and engage with the connectors 43, which in turn engage with the plurality of accessory wires 10. Furthermore, Figure 4B shows a plurality of screws 50 positioned within the elongated portion of the first plug-in. mate 40. The screws 50 are operable to tighten wire clamps (not shown) to secure the user equipment wires 48. The user equipment wires 48 and the accessory wires .10 are mechanically and electrically connected by inserting the plurality of mate connectors 36 into the corresponding connection apertures 34.

Figure 4C shows the assembled low-voltage circuit breaker 3 as shown in Figure 4 including the housing 5, front portion 7, rear portion 9, outer side wall 9a, top wail 9b, back wall 9c, first and. second stationary connector assemblies 1 1 , 13, first and second plug-in mates 40,41, which are each coupled to the corresponding first and second stationary connector assemblies 1 1,13, and plurality of extension apertures 38,39. In Figure 4C, the first and second plug-in mates 40, 1 , which are each coupled to the connector assemblies 1 1 ,13, are each a right-angle design. Although Figure 4A shows both the first and second plug-in mates 40,41 , in. the shape of a right angle, it is contemplated that in alternate embodiments one or both of the first and second plug-in mates 40,41 included in the rear portion 9 of the housing 5 may be in. the shape of a right angle.

In certain embodiments, the first and second plug-in mates 40,41 can be fabricated and manufactured separately from the housing 5. in these embodiments, the first and second stationary connector assemblies 1 1 ,13 and the first and second plug-in mates 40,41 can be attached in the field to the first and second stationary connector assemblies 1 1 ,13 on an as-needed basis. The material of construction for the first and second stationary connector assemblies 1 ! , 1 and the first and second plug-in mates 40.4 ! can be the same or different.

In other embodiments, the first and second stationary connector assemblies

1 1 ,13 and the first and second plug-in mates 40,41 may be fabricated and manufactured as a single integrated piece or part.

Existing electrical switching apparatus may be adapted to accommodate installation of the first and second stationary connector assemblies 1 1 , 13 and the first and second plug-in mates 40,41 or, alternatively, new electrical switching apparatus may be manufactured to integrate the first and second stationary connector assemblies 1 1.13 and/or the first and second plug-in mates 40,41 therein.

The disclosed concept also includes a method of ineorporating one or more connector assemblies into an electrical switching apparatus, such as a low-voltage molded case circuit breaker, for the purpose of mechanically and eleciricaliy connecting wires from one or more accessory components, which are housed in the electrical switching apparatus, with wires from user equipment and apparatus, which are located outside of the housing of the electrical switchin apparatus. As mentioned herein, the one or more connector assemblies are positioned wi thin one or more of the walls that form the electrical switching apparatus. In certain embodiments, the one or more connector assemblies are positioned within the back wall of the electrical switching apparatus. In other embodiments, one connector assembly is positioned in each of the two side walls of the electrical switching assemblies. Since the connector assemblies ar typicall flush with the surface of the wall , a plug-in mate can be coupled to the each of the connector assemblies to extend the wires beyond the surface of the wall in a. pre-selected di rec tion. For example, a pl ug-in mate can further extend the wires outwardly in a linear or perpendicular direction, in certain embodiments, the plug-in mates are in the shape of a right-angle.

While specific embodiments of the disclosed concept have been described in detail, it will be appreciated by those skilled in the art that various modifications and alternatives to those details could be developed in light of the overall teachings of the disclosure. Accordingly, the particular arrangements disclosed are meant to be illustrative only and not limiting as to the scope of the disclosed concept which is to be given the Ml breadth of the claims appended and any and all equivalents thereof.