Abstract:
A battery holder assembly ( 219 ) includes a cavity structure (CS), a screw plate (SP), a spring electrical contact (SEC), an insulator cup (IC), and a pin ( 402 ). CS ( 392 ) defines a cavity ( 210 ) in a chassis panel (CP) of an electronic device (ED). SP ( 320 ) snugly fits within an opening in CP ( 212 ). SP has a base ( 702 ) forming a cover for enclosing the cavity. SP forms a connection with CS and a first terminal of a battery ( 318 ), when battery is positioned in the cavity and SP is fitted within the opening. SEC ( 802 ) provides a connection between battery and SP. IC ( 322 ) snugly receives battery therein. IC fits within the cavity and electrically insulates a second terminal of battery from CS. A battery contact (BC) is disposed on IC. BC ( 716, 412 ) provides a connection to the second terminal. Pin forms a connection between BC and ED.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Statement of the Technical Field 
         [0002]    The invention concerns battery packaging systems. More particularly, the invention concerns low profile hold up battery packaging systems for use in a variety of electronic devices having various internal configurations. 
         [0003]    2. Description of the Related Art 
         [0004]    Electronic devices which comprise internal circuit components are typically powered by external primary batteries. These external primary batteries are often housed in a battery compartment of the electronic device in a manner enabling an electrical connection between the battery and the internal circuit components. However, it is increasingly desirable to provide these internal circuit components with a back-up battery. The back-up battery can generally be provided for assuring continued retention of stored information in the event of a power loss from the primary power source. 
         [0005]    The back-up battery may be housed in a battery package system configured to be coupled to the electronic device. Despite the advantages of the conventional battery packaging systems, they suffer from drawbacks. For example, the conventional battery packaging systems often have a relatively large profile. The conventional battery packaging systems are typically not designed to provide an environmental seal to two (2) meters below the surface of the water. The conventional battery packaging systems are typically not designed to be used with electronic devices having a variety of internal configurations. The conventional battery packaging systems have relatively complicated assemblies. 
         [0006]    In view of the forgoing, there is a need for a battery packaging system having a low profile and a relatively easy assembly. The battery packaging system shall provide an environmental seal to two (2) meters below the surface of the water. The battery packaging system shall have the capability to be used with electronic devices having a variety of internal configurations. 
       SUMMARY OF THE INVENTION 
       [0007]    The present invention concerns a battery holder assembly for an electronic device. The battery holder assembly is comprised of a cavity structure, a screw plate, a spring electrical contact, an insulator cup, a battery, and a pin. The cavity structure is disposed in a chassis panel of the electronic device. The cavity structure defines a cavity. The cavity structure is at least partially formed of an electrically conductive material. 
         [0008]    The screw plate is at least partially formed of an electrically conductive material sized and shaped to be snugly fitted within an opening in the chassis panel defined by the cavity structure. The screw plate has a base which forms a cover for enclosing the cavity. The screw plate is configured to form an electrical connection with the cavity structure and a first terminal of a coin cell battery, when the battery is positioned in the cavity and the screw plate is fitted within the opening. At least one slot or notch is disposed on a surface of the screw plate for receiving a tool. 
         [0009]    The spring electrical contact is disposed on an inner face of the screw plate. The spring electrical contact is configured for providing an electrical connection between the battery disposed in the cavity and an inner face of the screw plate. 
         [0010]    The insulator cup is formed of an electrically insulating material. The insulator cup is sized and shaped for snugly receiving the coin cell battery therein. The insulator cup is configured to fit within the cavity. The insulator cup is also configured to electrically insulate a second battery terminal of a coin cell battery when positioned therein from the cavity structure. A battery contact is disposed on the insulator cup. The battery contact is formed of an electrically conductive material configured for providing an electrical connection to a second terminal of the coin cell battery when the coin cell battery is positioned in the cavity. The pin is formed of a conductive material. The pin forms an electrical connection extending between the battery contact on the insulator cup and a circuit board of the electronic device. 
         [0011]    According to an aspect of the invention, the pin is comprised of a pogo pin having at least one movable end which is resiliently biased for movement in a direction aligned with an axis of the pin. The movable end of the pin is configured to resiliently engage the battery contact on the insulator cup when the circuit board is secured adjacent to the chassis panel. 
         [0012]    According to another aspect of the invention, the screw plate is comprised of a peripheral side wall with threads disposed thereon. The threads are configured for threaded engagement with a threaded sidewall of the cavity structure. A gasket is disposed within the cavity structure. The gasket is positioned to engage an edge of the peripheral sidewall opposed from the base. The gasket provides a seal between the screw plate and the cavity structure. The seal excludes the entry of environmental contaminants through the cavity and into the electronic device. 
         [0013]    According to another aspect of the invention, the insulator cup is comprised of one or more clips integrally formed with the insulator cup. The clips are configured for securing a coin cell battery in the insulator cup when positioned therein. The insulator cup is further comprised of a bushing which projects from a base thereof. The bushing extends through an aperture formed in the cavity structure opposed from the screw plate. The bushing has a bore defined therein configured for receiving the pin. A flange is disposed on the bushing. The flange is configured for engaging a securing clip. The securing clip is configured to secure the insulator cup in the cavity structure. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS  
         [0014]    Embodiments will be described with reference to the following drawing figures, in which like numerals represent like items throughout the figures, and in which: 
           [0015]      FIG. 1  is a perspective view of an exemplary communication device that is useful for understanding the present invention. 
           [0016]      FIG. 2  is a perspective view of the communication device of  FIG. 1  with a battery cover and a primary battery removed therefrom. 
           [0017]      FIG. 3  is an exploded view of a portion of the communication device that is useful for understanding the present invention. 
           [0018]      FIG. 4  is a cross sectional view of a portion of the communication device taken along line  4 - 4  of  FIG. 2 . 
           [0019]      FIG. 5  is a schematic illustration of an alternative embodiment of an internal configuration of a communications device that is useful for understanding the present invention. 
           [0020]      FIG. 6  is a perspective view of a top of a battery assembly that is useful for understanding the present invention. 
           [0021]      FIG. 7  is a perspective view of a bottom of a battery assembly that is useful for understanding the present invention. 
           [0022]      FIG. 8  is a first exploded perspective view of the battery assembly shown in  FIGS. 6-7  that is useful for understanding the invention. 
           [0023]      FIG. 9  is a second exploded perspective view of the battery assembly shown in  FIGS. 6-7  that is useful for understanding the invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS  
       [0024]    Embodiments of the present invention will now be described with respect to  FIGS. 1-9 . Embodiments of the present invention relate to battery packaging systems. More particularly, the invention concerns low profile battery packaging systems for use in a variety of electronic devices having various internal configurations. Such electronic devices can include, but are not limited to, radios, mobile telephones, cellular telephones, video cameras, recording devices, digital cameras, sensors, and other electronic devices. Embodiments of the battery packaging systems have relatively easy assemblies as compared to conventional battery packaging systems. Embodiments of the battery packaging systems are environmentally sealed to at least two (2) meters below the surface of the water. Embodiments of the battery packaging systems are designed to meet the MIL-STD-810F environmental standards. The MIL-STD-810F environmental standards are well known to those having ordinary skill in the art, and therefore will not be described herein. However, it should be understood that battery packaging systems can operate under harsh environmental conditions. Embodiments of the battery packaging systems are easily replaceable using conventional rotational driving tools (e.g., watch tool drivers, screw drivers, and pocket knifes) and/or coins. 
         [0025]    Before describing the battery packaging systems of the present invention, it will be helpful in understanding an exemplary environment in which the invention can be utilized. In this regard, it should be understood that the battery packaging systems of the present invention can be utilized in a variety of different applications where back-up batteries are needed for powering circuit components of an electronic device in the event of a power loss from the primary power source. Such applications include, but are not limited to, radio applications, mobile/cellular telephone applications, visual/audio recording applications, camera applications, sensor applications, and other military/commercial electronic device applications. 
         [0026]    Referring now to  FIG. 1 , there is provided an electronic device  100  that is useful for understanding the present invention. Although electronic device  100  is shown to be a radio, the invention is not limited in this regard. For example, electronic device  100  can be a radio, a mobile telephone, a cellular telephone, a video camera, a recording device, a camera, a sensor, or any other electronic device. As shown in  FIG. 1 , electronic device  100  is generally comprised of a housing  102  configured to house circuits (not shown), batteries (not shown), and other electronic components (not shown). Housing  102  can be formed from any conductive material, such as a metal material. 
         [0027]    Housing  102  is comprised of a main body  104  and a battery cover  106  coupled to the main body  104  via a mechanical connector  108 . Battery cover  106  is a removable component facilitating the insertion of a primary battery (shown in  FIG. 2 ) and a hold-up battery (not shown) into electronic device  100 . Battery cover  106  also facilitates the removal of the batteries (not shown) from electronic device  100 . This battery removal is accomplished by the de-coupling of the battery cover  106  from the electronic device  100 . As a result of the battery cover de-coupling, a user (not shown) has access to the batteries (not shown) for removal of the same. 
         [0028]    Referring now to  FIG. 2 , there is provided a perspective view of the electronic device  100  having the battery cover  106  and a primary battery  202  removed therefrom. The primary battery  202  is provided for supplying power to internal circuitry (not shown) during normal operations of the electronic device  100 . A hold-up battery is generally provided for powering circuit components (not shown) of the electronic device  100  in the event of a power loss from or the removal of the primary battery  202 . The hold-up battery is provided in a chassis panel, which in this case is a bottom wall  212  of a battery compartment  206  within a battery holder assembly  219 . The invention is not limited in this regard. For example, the battery holder assembly  219  can be provided in any suitable portion of the electronic device  100 , provided that an electrical connection can be made as hereinafter described between internal circuitry (not shown) of the electronic device  100  and the hold-up battery. 
         [0029]    Referring now to  FIG. 3 , there is provided an exploded view of a portion of the communication device  100 . As shown in  FIG. 3 , the battery holder assembly  219  comprises a battery assembly  390  and a chassis assembly  392 . The battery assembly  390  is comprised of a screw plate  320 , an insulator cup  322 , and a battery  318 . Each of these components  320 ,  322 ,  318  will be described below in relation to  FIGS. 4-9 . However, it should be noted that the screw plate  320  comprises a sidewall  326  with threads  324  formed thereon. The threads  324  of screw plate  320  are configured to threadingly engage threads  330  formed in a sidewall  334  defining cavity  210  of chassis assembly  392 . The threaded engagement facilitates the retention of screw plate  320  within cavity  210 . It should also be noted that the screw plate  320  and sidewall  334  of cavity  210  are formed of an electrically conductive material. In effect, an electrical connection can be established between battery  318  and a chassis  332  for grounding the same. 
         [0030]    Referring now to  FIG. 4 , there is provided a cross sectional view of the portion of the electronic device  100  taken along line  4 - 4  of  FIG. 2 . As shown in  FIGS. 3-4 , cavity  210  has a gasket  400  disposed therein. Gasket  400  provides a seal which prevents an intrusion of water and dust into an interior of cavity  210 . The seal is formed between an edge of screw plate  320  and a bottom wall  416  of cavity  210 . In this regard, it should be understood that the sidewall  336  of screw plate  320  comprises a chamfered edge  450  configured for facilitating the establishment of the seal by engaging gasket  400  so as to compress the gasket  400  against the surrounding structure. 
         [0031]    According to an embodiment of the invention, gasket  400  is a continuous molded o-ring gasket formed of silicone rubber having a hardness between forty (40) and ninety (90) durometers. The invention is not limited in this regard. Gasket  400  can be formed of any type or material selected in accordance with a particular electrical connector application. 
         [0032]    It should be noted that cavity  210  includes an internal bore  350  (shown in  FIG. 3 ) which provides access to an interior of the electronic device  100 . More particularly, the internal bore  350  (shown in  FIG. 3 ) enables the protrusion of at least a portion of an electrically conductive pin  402  into cavity  210  (as shown in  FIG. 3 ). Electrically conductive pin  402  is generally configured to electrically connect a hold-up battery  318  to a hold-up battery circuit (not shown) printed on a printed circuit board  404  disposed within electronic device  100 . As such, a first end  408  of the electrically conductive pin  402  is coupled to the printed circuit board  404  at a location in which an electrical connection between the pin  402  and a positive power supply line (not shown) of the hold-up battery circuit (not shown) is established. A second end  410  of the electrically conductive pin  402  comprises a contact surface  406  configured for engaging an electrically conductive contact  412  of the battery assembly  390 . 
         [0033]    Electrically conductive pin  402  can be a generally cylindrically shaped pin having a tip end that can be resiliently biased toward a battery for resiliently engaging a contact of the hold-up battery  318 . For example, the electrically conductive pin  402  can comprise a pogo pin available from Interconnect Devices, Inc., of Kansas City, Kans. The pogo pin includes a contact surface  406  on one of two (2) opposing ends. The pogo pin also includes a chamber with a spring disposed therein. When the pogo pin is actuated, a movable end is reliantly biased for movement in a direction aligned with an axis of the pin. In effect, the spring is compressed and the length of the pogo pin is decreased. The invention is not limited in this regard. 
         [0034]    Referring again to  FIG. 4 , the screw plate  320  has a height  472  that is substantially similar to the height  470  of cavity  210 . Heights  472 ,  470  can be selected in accordance with any electronic device application. According to an embodiment of the invention, heights  470 ,  472  are selected to have values falling within the range of half inch to a twentieth of an inch (0.5″-0.20″). Screw plate  320  can be sized and shaped so that top peripheral surface  490  is generally flush with a bottom wall  212  of battery compartment  206  (described above in relation to  FIG. 2 ) when screw plate  320  is fully inserted into cavity  210 . The invention is not limited in this regard. Screw plate  320  will be described in further detail below in relation to  FIGS. 6-9 . 
         [0035]    As shown in  FIG. 4 , insulator cup  322  and battery  318  are disposed within screw plate  320  when the screw plate is fully inserted within cavity  210 . Insulator cup  322  is disposed within cavity  210  and secured to electronic device  100  via bushing  426 . Bushing  426  can be integrated with insulator cup  322  or can be a separate component coupled to insulator cup  322  via a coupling means (e.g., an adhesive). If bushing  426  is integrated with insulator cup  322 , then it may be integrally molded with insulator cup  322  during an injection molding process. Injection molding processes are well known to those having ordinary skill in the art, and therefore will not be described herein. Any known injection molding process can be used to form the insulator cup  322  with bushing  426  integrated therewith. 
         [0036]    As shown in  FIG. 4 , bushing  426  protrudes away from a bottom surface  454  of insulator cup  422 . Bushing  426  has a flange  428  configured for engaging chassis clip  430 . Chassis clip  430  is configured for securing the insulator cup  322  to the electronic device  100 . Chassis clips are well known to those having ordinary skill in the art, and therefore will not be described herein. 
         [0037]    Referring again to  FIG. 4 , bushing  426  has a central aperture  424  sized and shaped to receive the electrically conductive pin  402 . Electrically conductive contact  412  is disposed within central aperture  424  for facilitating an electrical connection with the electrically conductive pin  402 . The electrically conductive contact  412  extends through the insulator cup  322  to provide an electrical connection to battery  318 . 
         [0038]    Insulator cup  322  is formed of a dielectric material having a shape suitable for isolating a positive terminal  440  of battery  318  from a chassis  332  of the electronic device  100 . Such dielectric materials include, but are not limited to, polymers, rubbers, and plastics. Insulator cup  322  is also sized and shaped for being snuggly received by a recess  434  formed in screw plate  320 . Insulator cup  322  will be described in further detail below in relation to  FIGS. 6-9 . 
         [0039]    Battery  318  is disposed within insulator cup  322  and the entire assembly is positioned within recess  434  of the screw plate  320 . Accordingly, insulator cup  322  is sized and shaped to receive battery  318 . Battery  318  can generally be a coin cell battery. Coin cell batteries are well known to those having ordinary skill in the art, and therefore will not be described herein. However, it should be understood that any coin cell battery can be used without limitation. It should also be understood that coin cell batteries typically have a diameter with a value falling within the range of five millimeters to thirty millimeters (5 mm-30 mm). Coin cell batteries also typically have a height with a value falling within the range of one millimeter to thirty millimeters (1 mm-30 mm). The invention is not limited in this regard. Battery  318  can be any known battery suitable for a particular electronic device application. 
         [0040]    Referring again to  FIG. 4 , battery  318  comprises the positive terminal  440  and a negative terminal  442 . Battery  318  is positioned within recess  434  so that an electrical connection between it&#39;s positive terminal  440  and the electrically conductive contact  412  is established. Battery  318  is also positioned within recess  334  so that an electrical connection between it&#39;s negative terminal  442  and screw plate  320  is established. Of course, it should be understood that the particular polarity of the battery is not critical to the invention. 
         [0041]    Referring now to  FIG. 5 , there is provided a schematic illustration of an alternative internal configuration of an electronic device that is useful for understanding the present invention. In  FIGS. 4 and 5 , common structure is identified using the same reference numbers whenever possible. In addition, it will be noted that in  FIG. 5 , a circuit board  404  is placed a smaller distance from the battery assembly  390 . Likewise, a shorter pin  402  is used to form the connection from the battery assembly  390  to the circuit board  404 . As can be observed from  FIGS. 4 and 5 , battery assembly  390  can advantageously be used in electronic devices having different internal configurations. These internal configurations can include electrically conductive pins of different types and sizes. These internal configurations can also include printed circuit boards having different sizes and locations within the electronic devices. Battery assembly  390  will now be described in detail in relation to  FIGS. 6-9 . 
         [0042]    Referring now to  FIG. 6 , there is provided a top perspective view of battery assembly  390  that is useful for understanding the present invention. As noted above, screw plate  320  is configured to facilitate an electrical connection between battery  318  (described above in relation to  FIG. 3 ) and chassis  332  (described above in relation to  FIG. 3 ) of electronic device  100  (described above in relation to  FIG. 1 ). As such, screw plate  320  is formed of an electrically conductive material. Such electrically conductive materials include, but are not limited to, metal materials (e.g., brass with electroless nickel). Screw plate  320  can be formed utilizing any suitable process known to those having ordinary skill in the art. Such processes include, but are not limited to, molding processes, etching processes, and machining processes. 
         [0043]    As shown in  FIG. 6 , screw plate  320  has a generally circular shape with a slot  600  and notches  602 . The slot  600  is configured for facilitating an easy replacement of battery  318  (described above in relation to  FIG. 3 ) using conventional rotational driving tools and/or coins. Such conventional tools include, but are not limited to, screw drivers and pocket knifes. The slot  600  can be formed in screw plate  320  using any suitable process, such as a machining process. The slot  600  can have a width  604 , length  606 , and depth (not shown) selected in accordance with a particular battery assembly  390  application. 
         [0044]    The notches  602  provide a means for gripping the screw plate  320  so that the screw plate  320  can be driven by conventional rotational driving tools. Such tools include, but are not limited to, watch tool drivers. Although six notches  602  are shown in  FIG. 6 , the invention is not limited in this regard. Screw plate  320  can have any number of notches selected in accordance with a particular battery assembly  390  application. Notches  602  can have a width  608 , length  610 , and depth (not shown) selected in accordance with a particular battery assembly  390  application. 
         [0045]    Referring now to  FIG. 7 , there is provided a bottom perspective view of screw plate  320  with insulator cup  322  disposed within a recess  434  formed in screw plate  320 . Recess  434  is formed by sidewall  326  and base member  702  of screw plate  320 . Recess  434  is sized and shaped to receive insulator cup  322 . As also shown in  FIG. 7 , the electrically conductive contact  412  of insulator cup  322  is disposed in bushing  426 . The electrically conductive contact  412  facilitates an electrical connection between the battery  318  (described above in relation to  FIG. 3 ) and electrically conductive pin  302 . 
         [0046]    Referring now to  FIGS. 8-9 , there are provided exploded perspective views of battery assembly  390  that is useful for understanding the invention. As also shown in  FIGS. 8-9 , screw plate  320  comprises base member  702  and sidewall  326 . Negative designators  900  are formed on an inner surface  902  of the base member  702 . The negative designators  900  are provided to ensure that the battery  318  (described above in relation to  FIG. 3 ) is placed in insulator cup  322  is a proper configuration. Screw plate  320  also comprises threads  324  formed on sidewall  326 . The threads  324  are configured to threadingly engage a threaded surface  334  of cavity  210  (described above in relation to  FIGS. 3-4 ). The threaded engagement facilitates the retention of screw plate  320  within cavity  210  (described above in relation to  FIGS. 3-4 ) of electronic device  100 . 
         [0047]    As shown in  FIGS. 8-9 , a resilient conductive member  802  is provided. Resilient conductive member  802  is generally formed of an electrically conductive material capable of functioning as a spring and resisting corrosion under certain environmental conditions. Such electrically conductive materials include, but are not limited to, metal materials (such as a beryllium copper material). Resilient conductive member  802  can be formed using any suitable method known in the art. Such methods include a machining and bending process. 
         [0048]    Resilient conductive member  802  facilitates the establishment of an electrical connection between battery  318  and screw plate  320 . Resilient conductive member  802  is provided to account for size tolerance variations of the battery  318 . Resilient conductive member  802  is configured to retain an electrical connection to battery  318  despite external forces (such as vibration). As such, resilient conductive member  802  has a cup-shaped member  806  with a flat flap  804 . The cup-shaped member  806  is configured to engage a negative terminal  442  of battery  318 . The flap  804  facilitates the coupling of the resilient conductive member  802  to screw plate  320 . Flap  804  can be coupled to the inner surface  902  of screw plate  320  using any known electrically conductive coupling means. Such coupling means include, but are not limited to, electrically conductive adhesives and electrically conductive resins. 
         [0049]    As shown in  FIG. 8 , the insulator cup  322  comprises positive designators  850  formed on a bottom surface  860  thereof. The positive designators  850  are provided to ensure that the battery  318  is placed in insulation member  322  is a proper configuration. 
         [0050]    As shown in  FIGS. 8-9 , the insulator cup  322  comprises spaced apart sidewalls  806 . The sidewalls  806  can be equally or non-equally spaced apart along a peripheral edge  812  of insulator cup  322 . The sidewalls  806  extend away from a bottom surface  860  of the insulator cup  322 . An insert space  890  is formed by the sidewalls  806  and a base  820 . Although three (3) sidewalls  806  are shown in  FIGS. 8-9 , the invention is not limited in this regard. Insulator cup  322  can include any number of spaced apart sidewalls  806  selected in accordance with a particular battery assembly  390  application. 
         [0051]    Each sidewall  806  includes a clip  808  protruding away from a top portion  814  of the respective sidewall  806 . Clips  808  are designed to resiliently engage battery  318  when battery is inserted into insulator cup  322 . The clips  808  removably retain battery  318  in insulator cup  322 . In this regard, it should be noted that a space  810  is provided between each pair of sidewalls  806  to facilitate the removal of battery  318  from the insulator cup  322 . Battery  318  can be removed from insulator cup  322  without using a tool. 
         [0052]    Insulator cup  322  also comprises an electrically conductive contact  816  coupled thereto. Contact  816  is generally formed of an electrically conductive material capable of functioning as a spring and resisting corrosion under certain environmental conditions. Such electrically conductive materials include, but are not limited to, metal materials (such as a beryllium copper material). Contact  816  can be formed using any suitable method known in the art. Such methods include a machining and bending process. 
         [0053]    Contact  816  facilitates the establishment of an electrical connection between the positive terminal  440  of battery  318  and electrically conductive pin  402  (described above in relation to  FIG. 4 ). As such, contact  816  is a single electrically conductive element including a portion  826  located on a first side  822  of the insulator cup  322 , a portion  828  passing through the insulator cup  322 , and a portion  906  located on a second side  824  of the insulator cup  322 . 
         [0054]    Portion  826  of contact  816  is configured to retain an electrical connection to positive terminal  440  of battery  318  despite external forces (such as vibration). As such, portion  826  can be an S-shaped member  818  configured to act as a spring. The S-shaped member  818  projects inwardly from a bottom surface  860  of insulation member  322 . The S-shaped member  818  is configured to engage the positive terminal  440  of battery  318 . Portion  906  is coupled to the S-shaped member  818  via portion  828 . Portion  906  comprises the electrically conductive contact  412  of the hold-up battery member  220  (described above in relation to  FIGS. 3-4 ). As noted above, the electrically conductive contact  412  is configured to engage the electrically conductive pin  402  (described above in relation to  FIG. 4 ) for providing an electrical connection between internal circuitry (not shown) of electronic device  100  and battery  318 . 
         [0055]    All of the apparatus, methods, and algorithms disclosed and claimed herein can be made and executed without undue experimentation in light of the present disclosure. While the invention has been described in terms of preferred embodiments, it will be apparent to those having ordinary skill in the art that variations may be applied to the apparatus, methods and sequence of steps of the method without departing from the concept, spirit and scope of the invention. More specifically, it will be apparent that certain components may be added to, combined with, or substituted for the components described herein while the same or similar results would be achieved. All such similar substitutes and modifications apparent to those having ordinary skill in the art are deemed to be within the spirit, scope and concept of the invention as defined.