Abstract:
A threadless light socket assembly allows a light bulb to be changed by pushing or pulling the light bulb into or out of the socket provides an outer insulator housing and an insulator cap which carrying a ground socket in a medial channel that grounds a light bulb base to a power supply. Plural spring biased thread locks protrude into center of the ground socket and are staggered in height to align with threads defined in a light bulb base. A positive contact is in the socket assembly supplies positive power from a power supply to the light bulb base. The threadless light socket has interchangeable components to allow installation in new and existing light fixtures.

Description:
RELATED PATENT DATA 
       [0001]    This patent is a continuation of and claims priority to U.S. patent application Ser. No. 13/540,318, which was filed Jul. 2, 2012, which claims priority to U.S. Provisional Patent Application Ser. No. 61/571,765, which was filed Jul. 5, 2011, the disclosures of which are hereby incorporated herein by reference. 
     
    
     FIELD OF THE INVENTION 
       [0002]    The present invention relates generally to light bulb sockets, and more specifically to a threadless light bulb socket allowing installation and removal of a common threaded light bulb by pushing or pulling the light bulb in or out of the light socket without a need to axially rotate the light bulb or the socket. 
       BACKGROUND OF THE INVENTION AND 
     Description of the Prior Art 
       [0003]    Light Bulb Sockets for receiving and powering threaded screw-in light bulbs are known. The purpose and object of a light bulb socket is to secure a light bulb into a light fixture and to conduct electric current through a positive terminal and a ground terminal of the bulb to cause illumination of the bulb. 
         [0004]    Over the years, a variety of means and methods have been developed to make it easier to install/remove a threaded light bulb in/from a light socket. Some such means and methods have used a socket formed from a flexible conductive material that flexes to allow a threaded light bulb to slide into or out of the socket with sufficient resistance so the bulb will not fall out of the socket and will still conduct electricity to the bulb. 
         [0005]    Although such sockets have made it easier to install and replace a light bulb, these sockets have remained ineffective because they cannot be altered to accommodate various types of light bulbs or light fixtures. 
         [0006]    The many different sizes, shapes, and weights of light bulbs cannot be accommodated in known threadless sockets. For example, a large flood lamp in a ceiling light fixture requires more pressure to secure than a standard 60 watt light bulb in a table lamp. Further, when the bulb is inverted, the weight of the light bulb becomes a factor because the pressure supplied by the socket must be sufficient to securely retain the light bulb while concurrently maintaining electrical contact with the positive terminal and of the negative terminal of the bulb Maintaining a sufficient holding force on the light bulb is especially important when the fixture and bulb therein are inverted and suspended above people&#39;s heads or anything else that could be damaged if the light bulb were to fall out of socket and/or fixture. 
         [0007]    Known threadless sockets are also larger than common light sockets, which makes it impossible for the user to install such known threadless sockets into light fixtures without the need to modify the light fixtures to accommodate a larger socket. 
         [0008]    Another problem with known threadless sockets is the inability to change the retaining pressure exerted in a light bulb to positionally maintain the light bulb. As noted previously, known threadless sockets use plural flexible fingers formed of electrically conductive material. As such, to accommodate a different light bulb, or an entirely different weight of light bulb, a different bulb socket is needed. Unfortunately, with hundreds of different sizes, shapes, and weights of light bulbs available and in use, one would need to manufacture a threadless socket for nearly every light bulb size and weight. 
         [0009]    My threadless light bulb socket overcomes various of the aforementioned drawbacks by providing a threadless socket that is standard socket size, can securely retain and power a wide variety of bulbs and can be modified to accommodate many different sizes and styles of light bulbs. Insulator housings are also interchangeable to install my threadless sockets in all different types and styles of light fixtures, without the need to modify the fixture. 
         [0010]    Some or all of the drawbacks and problems explained above, and other drawbacks and problems, may be helped or solved by my invention shown and described herein. My invention may also be used to address other problems not set out herein or which become apparent at a later time. The future may also bring to light unknown benefits which may be in the future appreciated from the novel invention shown and described herein. 
         [0011]    My invention does not reside in any one of the identified features individually, but rather in the synergistic combination of all of its structures, which give rise to the functions necessarily flowing therefrom as hereinafter specified and claimed. 
       SUMMARY OF THE INVENTION 
       [0012]    My threadless light socket provides an insulator housing axially carrying a ground socket, defining plural spacedly arranged radial holes carrying thread locks and biasing springs for holding and grounding a light bulb in the socket. An insulation cap secures the ground socket in the insulation housing and carries a positive terminal contact for electrical contact with the light bulb. A socket retainer positionally maintains the socket in a light fixture. 
         [0013]    In providing such a threadless light socket assembly: 
         [0014]    a principal object to provide a threadless light socket assembly that allows a threaded light bulb to be installed into and removed from the socket, without axially rotating the socket or the light bulb. 
         [0015]    a further object to provide such an assembly that allows a light bulb to be removed from the socket by axially pulling the light bulb out of the socket and to be installed into the socket by axially pushing the light bulb into the socket. 
         [0016]    a further object to provide such an assembly which can be modified for receiving and retaining standard screw-in light bulbs of various sizes, shapes, weights and types. 
         [0017]    a further object to provide such an assembly that can be installed in a variety of light fixtures. 
         [0018]    a further object to provide such an assembly that may be used to retro-fit old light fixtures. 
         [0019]    a further object to provide such an assembly that may be installed in vertical, horizontal, overhead, and recessed light fixtures. 
         [0020]    a further object to provide such an assembly that maintains continuous electrical contact with the light bulb positive terminal and ground terminal. 
         [0021]    a further object to provide such an assembly that may be modified to change the amount of force that positionally retains the light bulb in the socket, and the amount of force it takes to install and remove the light bulb. 
         [0022]    a further object to provide such an assembly that uses thread locks, applying a radial inward force to a light bulb&#39;s threaded base to secure the bulb in the socket and to provide a ground contact. 
         [0023]    a further object to provide such an assembly wherein the pressure supplied by the thread locks may be easily changed by changing the biasing springs. 
         [0024]    a further object to provide such an assembly wherein the thread lock housings defined in the ground socket are staggered in position so the thread locks engage in the deepest concave position of the bulb base threads. 
         [0025]    a further object to provide such an assembly that ensures that the light bulb is held securely and safely in the socket. 
         [0026]    a further object to provide such an assembly that has interchangeable insulator housings so the socket can be adapted into different styles and types of light fixtures, including recessed ceiling light fixtures, horizontal fixtures and table and floor lamps. 
         [0027]    a further object to provide such an assembly that is adaptable to different applications and/or building codes without the need to manufacture a completely different socket. 
         [0028]    a further object to provide such an assembly that complies with federal, state and local electrical and building codes and regulations. 
         [0029]    a further object to provide such an assembly having interchangeable components. 
         [0030]    a further object to provide such an assembly wherein the ground socket may be manufactured from a variety of conductive materials. 
         [0031]    a further object to provide such an assembly that may be disassembled and reassembled with minimal tools and apparatus. 
         [0032]    a further object to provide such an assembly that makes it easier to change a light bulb, even in recessed light fixtures in high ceilings. 
         [0033]    Other and further objects of my invention will appear from the following specification and accompanying drawings which form a part hereof. In carrying out the objects of my invention it is to be understood that its structures and features and steps are susceptible to change in design and arrangement and order with only one preferred and practical embodiment of the best known mode being illustrated in the accompanying drawings and specified as is required. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0034]    Specific forms, configurations, embodiments and/or diagrams relating to and helping to describe preferred versions of my invention are explained and characterized herein, often with reference to the accompanying drawings. The drawings and all features shown therein also serve as part of the disclosure of my invention, whether described in text or merely by graphical disclosure alone. Such drawings are briefly described below. 
           [0035]      FIG. 1  is an isometric top and side view of my threadless light socket assembly. 
           [0036]      FIG. 2  is an isometric bottom, and side view of the threadless light socket assembly of  FIG. 1 . 
           [0037]      FIG. 3  is an exploded isometric side and bottom view of the threadless light socket assembly of  FIG. 1 , showing how the various parts fit together. 
           [0038]      FIG. 4  is an isometric top and side view of the insulator housing. 
           [0039]      FIG. 5  is an isometric bottom and side view of the insulator housing of  FIG. 4 . 
           [0040]      FIG. 6  is an isometric top and side view of a second embodiment of the insulator housing. 
           [0041]      FIG. 7  is an exploded isometric top and side view of the ground socket assembly, showing the spring housings, the thread locks and the biasing springs. 
           [0042]      FIG. 8  is an isometric bottom and side view of the ground socket of  FIG. 7 . 
           [0043]      FIG. 9  is an isometric top and side view of a second embodiment of the ground socket. 
           [0044]      FIG. 10  is an isometric bottom and side view of the ground socket of  FIG. 9   
           [0045]      FIG. 11  is an isometric top and side view of the positive contact assembly 
           [0046]      FIG. 12  is an isometric top and side view of a second embodiment of the positive contact assembly. 
           [0047]      FIG. 13  is an isometric top and side view of the insulator cap. 
           [0048]      FIG. 14  is an isometric bottom and side view of the insulator cap of  FIG. 13 . 
           [0049]      FIG. 15  is an isometric bottom and side view of the socket retainer and fasteners. 
           [0050]      FIG. 16  is an isometric bottom and side view of power supply wire leads. 
           [0051]      FIG. 17  is an isometric bottom and side view of a second embodiment of the insulator cap. 
           [0052]      FIG. 18  is an exploded isometric bottom and side view of the second embodiment of the insulator cap with a lamp style bottom cap. 
           [0053]      FIG. 19  is an isometric bottom and side view of a second embodiment of a bottom cap with a 90 degree connection bracket. 
           [0054]      FIG. 20  is an isometric bottom and side view of a spring type 90 degree connection bracket. 
       
    
    
     DESCRIPTION OF PREFERRED EMBODIMENT 
       [0055]    The readers of this document should understand that the embodiments described herein may rely on terminology used in any section of this document and other terms readily apparent from the drawings and the language common therefore as may be known in a particular art and such as known or indicated and provided by dictionaries. Dictionaries were used in the preparation of this document. Widely known and used in the preparation hereof are  Webster&#39;s Third New International Dictionary  (©1993),  The Oxford English Dictionary  (Second Edition, ©1989),  The New Century Dictionary  (©2001-2005) and the  American Heritage Dictionary of the English Language  (4th Edition ©2000) all of which are hereby incorporated by reference for interpretation of terms used herein and for application and use of words defined in such references to more adequately or aptly describe various features, aspects and concepts shown or otherwise described herein using more appropriate words having meanings applicable to such features, aspects and concepts. 
         [0056]    This document is premised upon using one or more terms or features shown in one embodiment that may also apply to or be combined with other embodiments for similar structures, functions, features and aspects of the invention and provides additional embodiments of the invention. Wording used in the claims is also descriptive of the invention and the text of both claims and abstract are incorporated by reference into the description entirely. Terminology used with one, some or all embodiments may be used for describing and defining the technology and exclusive rights associated herewith. 
         [0057]    The readers of this document should further understand that the embodiments described herein may rely on terminology and features used in any section or embodiment shown in this document and other terms readily apparent from the drawings and language common or proper therefore. 
         [0058]    My threadless light socket assembly  4  generally provides an insulator housing  5 , a ground socket  30 , an insulator cap  68  and a socket retainer  95  and is designed to work with and install into a variety of lighting fixtures. The insulator housing  5  is formed of a non-conductive material, such as, but not limited to, polycarbonate, Plexiglas®, Lexan®, glass, ceramic, acrylic or plastic. The insulator housing  5  has a top  6  which has a beveled edge  7  around a top opening  11 . The beveled edge  7  helps align screw-in light bulbs with the top opening  11 . A mounting flange  8  and a mounting surface  9  are also defined on the top  6  to assist in seating and aligning the assembly  4  in a recessed lighting fixture (not shown). Retainer reliefs  10  defined in the mounting surface  9  provide clearance for retainer locks  99  ( FIG. 3 ), carried by socket retainer  95 . Retainer locks  99  of the socket retainer  95  slide over outer circumferential surface  12  of the insulator housing  5 . Bottom  15  of insulator housing  5  defines plural mounting holes  16  for an insulator cap  68  and has a beveled edge  17  extending around bottom inside edge of the insulator housing  5 . 
         [0059]    Alignment boss  24  aligns the ground socket  30  (and a second embodiment of ground socket  31 ) with alignment relief  34  defined in the ground socket  30 ,  31 . Alignment of the boss  24  and relief  34  causes spring housings  37  to align with spring seats  18  which responsively aligns biasing springs  56  so a first end of each biasing spring  56  seats against spring seat  18 . Opposing end of each biasing spring  18  seats against and applies pressure against thread locks  55 . 
         [0060]      FIG. 9  shows top  32  and flange surface  35  of a second embodiment of the ground socket  31 . The top  32  seats against an inside seat  22  ( FIG. 5 ) and the flange surface  35  seats against an inside flange  20  of the insulator housing  5 . 
         [0061]      FIGS. 7 and 8  show the ground socket  30  formed from thin electrically conductive material, such as but not limited to, copper and which defines a medial chamber  43 .  FIGS. 9 and 10  show a second embodiment of the ground socket  31  that is cast or formed from thicker conductive material, such as, but not limited to, aluminum. 
         [0062]    Ground sockets  30 ,  31  each carry plural spacedly arranged spring housings  37 , each of which defines a medial channel  38  and a thread lock seat  39  at an end portion adjacent inside surface  42 . Spring housings  37  are staggered in height relative to the top  6  and bottom  15  so the thread locks  55  align with thread grooves defined in light bulb base  2 . Thread locks  55  are carried in the medial channel  38  defined by each thread lock housing  37  and protrude partially through thread lock seats  39  adjacent the inside surface  42  of the ground socket  30 , 31 , so that the thread locks  55  engage in the concave portions of threads of a light bulb base  2 . The thread lock seats  39  defined in the inside surface  42  have a radius (not shown) that is slightly smaller than the radius (not shown) of thread lock  55  so that the thread locks  55  cannot pass therethrough. Biasing springs  56  apply inward radial pressure to the thread locks  55  to force the thread locks  55  frictionally against the thread lock seats  39 . When a light bulb is pushed into the assembly  4 , the biasing springs  56  allow the thread locks  55  to retract into the medial channels  38  defined by spring housings  37  as the threads of a light bulb base  2  slide past the thread locks  55  until the light bulb base  2  is secured within the ground socket  30 . The biasing springs  56  bias the thread locks  55  into the deepest portions of the threads on the light bulb base  2  which responsively secure the light bulb and simultaneously maintain electrical contact with the ground sockets  30 ,  31 . 
         [0063]    Bottom mounting flange  44  ( FIG. 9 ) of ground socket  30 ,  31  defines mounting holes  45  for securement of an insulator cap  68  ( FIGS. 13 ,  14 ) that defines a socket mounting surface  72  for seating the ground socket  30 ,  31 . Ground sockets  30 ,  31  also define a positive terminal cut out  47  ( FIGS. 9 ,  10 ) that accommodates positive conductor mounting surface  74  ( FIG. 13 ) in the insulator cap  68 . 
         [0064]    The ground socket  30 ,  31  has an outer circumferential surface  49  and is axially carried within a housing channel  28  defined by the insulator housing  5 ,  26 . In the first embodiment ( FIG. 8 ), bottom  50  of the ground socket  30 ,  31  mates with socket mounting surface  72  of the insulator cap  68 . In the second embodiment ( FIG. 10 ) outer circumferential surface  49  of ground socket  31  extends radially outwardly of the socket mounting surface  72  to an outside edge of the insulator cap  68 . The first embodiment  30  and the second embodiment  31  of the ground socket  30 ,  31  fit axially into the channel  28  defined by the insulator housing  5 ,  26  and are able to use different insulator caps  68 ,  69  depending upon the type of light fixture into which the assembly  4  is being installed. 
         [0065]      FIGS. 13 and 14  show the insulator cap  68  defining a positive contact mounting hole  75  and plural spacedly arranged ground socket mounting holes  77  which align with mounting holes  45  defined in the ground socket  30 ,  31 . Insulator cap mounting holes  83  are also defined in the insulator cap  68  which align with mounting holes  16  defined in the bottom  15  of the insulator housing  5 ,  26 . Alignment reliefs  79  align with bosses  24  in the insulator housing  5 ,  26 . 
         [0066]    Mounting surface  81  of insulator cap  68  seats against the bottom  15  of the insulator housing  5 ,  26  and outer circumferential surface  12  of the insulator housing  5 ,  26  aligns with outer circumferential surface  84  of the insulator cap  68 , enclosing the ground socket  30 ,  31  within the insulator housing  5  and forming an aesthetically appealing assembly  4 .  FIG. 14  shows bottom  92  of the insulator cap  68  and wire mounting locations  86  which carry positive and negative wire leads  110 . ( FIG. 16 ). Counter-sunk fastener seat  87  carries a ground socket fastener  106 . Socket retainer mounting recess  90  is defined in bottom  92 , so when the socket retainer  95  is fastened to the insulator cap  68 , the socket retainer  95  is flush with the bottom  92  of the insulator cap  68 , allowing additional bottom clearance and creating an aesthetically appealing appearance. 
         [0067]      FIGS. 11 and 12  show first and second embodiments of positive contact assemblies  59 ,  65  which have a positive contact  60  to conduct electrical energy to a light bulb within the assembly  4 . The positive contact  60  communicates with a positive contact spring  61  which communicates with positive contact mounting flange  62 . The components of the positive contact assembly  59 ,  65  are constructed from an electrically conductive material such as, but not limited to, copper. The contact spring  61  applies upwardly biasing force to the contact  60  so that electrical contact with a positive terminal of a light bulb is achieved and maintained. The positive contact mounting flange  62  defines a mounting hole  63  for a fastener  106  to positionally secure the positive contact mounting flange  62  in electrical contact with mounting surface  74  in the insulator cap  68 ,  69 . 
         [0068]      FIG. 12  shows a second embodiment of the positive contact assembly  65  which is similarly formed of electrically conductive material such as, but not limited to, copper and has a contact  60 , a spring steel arm  66  that flexes to provide continuous contact with a light bulb positive terminal and a contact mounting flange  62  defining a mounting hole  63  for a fastener  106 . Both embodiments  59 ,  65  of the positive contacts  59 ,  65  fit against the contact mounting surface  74  in the insulator caps  68 ,  69 . 
         [0069]    Assembly of my threadless light socket assembly  4  begins with the positive terminal contact  59 ,  65 , the insulator cap  68 , a fastener  106 , and the positive wire lead  110 . One takes the insulator cap  68  and installs the positive terminal contact  59 ,  65  onto the contact mounting surface  74 . The positive wire lead  110  is attached to the positive wire mounting location  86  with fastener  106 , extending through a known electrical fitting carried by the positive wire lead  110  through the positive conductor mounting hole  75  and into the mounting hole  63  defined in the positive terminal contact  59 ,  65 . The ground socket  30 ,  31  is then installed onto the ground mounting surface  72  of the insulator cap  68 ,  69  by attaching the ground wire lead  110  into the ground wire mounting location  86  with a fastener  106  extending through a known electrical fitting on the ground wire lead  110  into the ground socket mounting hole  77  and into the mounting hole  45  defined in the ground socket  30 ,  31 . A fastener  106  is also placed in the fastener seat  87  to extend into and through the mounting hole  77  and into the mounting hole  45  defined in the ground socket  30  or  31 . The assembled insulator cap  68  assembly is then installed into the channel  28  of the insulator housing  5 . When the assembled ground socket  30 ,  31  is installed on the insulator cap  68 ,  69  alignment relief  79  will align with the alignment relief  34  of the ground socket  30 ,  31 . The alignment of the reliefs  34 ,  79  insures the components fit together correctly. 
         [0070]    After aligning the assembled ground socket  30 ,  31  assembly with the bottom  15  of the insulator housing  5 , the ground socket  30 ,  31  is inserted axially into the channel  28  of the insulation housing  5  only far enough so the spring housings  37  remain outside the insulator housing  5 . A thread lock  55  first and then a biasing spring  56  are inserted into the channel  38  of each spring housing  37 . After a thread lock  55  and a biasing spring  56  is inserted into each spring housing  37  channel  38  and the biasing springs  56  are compressed flush to outside edge of the spring housing  37 , the ground socket  30 ,  31  is “pushed” the “rest of the way” into the channel  28  defined by the insulator housing  5 . Beveled edge  17  helps the biasing springs  56  slide onto the spring seat  18 . The top  32  of the ground socket  30 ,  31  will seat frictionally against the inside seat  22  in the insulator housing  5 . Mounting surface  81  of the insulator cap  68  seats frictionally against the bottom  15  of the insulator housing  5 . 
         [0071]    To fasten the insulator cap  68  to the insulator housing  5 , first install the socket retainer  95  with the spring arms  97  and the retainer locks  99  going around the insulator housing  5 . The retainer locks  99  align with the retainer reliefs  10 . The socket retainer  95  fits into the retainer mounting recess  90  so the bottom  103  seats flush to the bottom  92  of the insulator cap  68 . Fasteners  108  extend through the mounting holes  101  in the socket retainer  95  through the insulator cap mounting holes  83  and into the insulator housing  5 . The completed assembly  4  may now be installed into a recessed lighting fixture (not shown). The assembly  4  clips into a recessed light fixture (not shown) by compressing the spring arms  97  together radially toward the insulator housing  5  so that the retainer locks  99  snap into the spring retainer reliefs  10 , the assembly  4  is installed into a light fixture socket hole (not shown) and the spring arms  97  thereafter flex back outwardly, securing the threadless light socket assembly  4  into the recessed light fixture (not shown). 
         [0072]    Other light fixtures (not shown) are designed for light socket assemblies to be mounted in a vertical position. For such fixtures, my second embodiment of the insulator housing  26  is used. My second embodiment  26  has an outside beveled edge  27  to provide an improved aesthetic appearance but all the components of the first and second embodiments  5 ,  26  respectively are interchangeable.  FIG. 17  shows the second embodiment of the insulator cap  69  which has the same top  70  as insulator cap  68 . The bottom  92  channels the positive and negative wire leads  110  to wire mounting locations  86  around a fastener seat  87  toward a center portion where the wire leads  110  pass through center mounting hole  115  of lamp style bottom cap  112 . ( FIG. 18 ). Bottom cap  112  fastens to the bottom  92  of the insulator cap  69  with fasteners  108  that extend through bottom cap mounting holes  113  and seat against fastener seats  114  through the insulator cap  69  mounting holes  83  and into the insulator housing mounting holes  16  defined in the insulator housing  26 . Bottom cap  112  also has a beveled edge  117  around the outside of the bottom  119 . Outer circumferential surface  118  of bottom cap  112  aligns with the outer circumferential surface  84  of the insulator cap  69 . A threaded mounting hole  115  is defined in a center portion of the bottom cap  112  though which the wire leads  110  pass making it possible to install my threadless light socket assembly  4  onto a threaded light fixture tube (not shown) and have the wire leads  110  pass through the tube (not shown). 
         [0073]    Other light fixtures (not shown) are designed for the light socket assemblies to be mounted in the horizontal orientation (not shown). For such horizontal mounting light fixtures, my threadless light socket assembly  4  may use the lamp style insulator housing  26  ( FIG. 6 ), and bottom cap  123  shown in  FIG. 19 . Bottom cap  123  has a hole  126  defined in a center portion and defines a bracket relief  129  for a 90 degree mounting bracket  130 . The bracket relief  129  is a recess defined in the bottom  128  of the bottom cap  123  so when the 90 degree mounting bracket  130  is installed thereon the mounting bracket  130  is flush with the bottom  128 . Beveled edge  127  extends about the bottom  128  outer circumferential surface  124  and the outer circumferential surface  124  is the same size as the outer circumferential surface  84  of the insulator cap  69  so that the two pieces align with an aesthetically appealing seam. The 90 degree mounting bracket  130  defines mounting holes  132  to mount the threadless light socket assembly  4  to the fixture (not shown).  FIG. 20  shows a spring type 90 degree mounting bracket  134  that may be used in light fixtures that define a rectangular “cut out” that retainer locks  136  clip into and hold the assembly  4  horizontal in the light fixture (not shown). 
         [0074]    My threadless light socket assembly  4  and all its interchangeable components can be adapted for use with various light fixtures in use or on the market today. 
         [0075]    The above description of my invention has set out various features, functions, methods and other aspects of the invention. This has been done with regard to the currently preferred embodiments thereof. Time and further development may change the manner in which the various aspects are implemented. Such aspects may further be added to by the language of the claims which are incorporated by reference hereinto as originally filed. The scope of protection accorded the invention, as defined by the claims, is not intended to be necessarily limited to the specific sizes, shapes, features or other aspects of the currently preferred embodiment shown and described. The claimed invention may be implemented or embodied in other forms still being within the concepts shown, described and claimed herein. Also included are equivalents of the invention which can be made without departing from the scope or concepts properly protected hereby. 
         [0076]    The foregoing description of my invention is necessarily of a detailed nature so that a specific embodiment of a best mode may be set forth as is required, but it is to be understood that various modifications of details, sizes, and rearrangement, substitution and multiplication of the parts may be resorted to without departing from its spirit, essence or scope. 
         [0077]    Having thusly described my invention, what I desire to protect by Utility Letters Patent and