Abstract:
A combination switch and socket is provided that can be easily installed without rewiring an existing fixture to give the user a closet light that automatically turns on when the closet door is opened and turns off when the door is closed. The socket can be screwed into an existing light fixture and the switch can be mounted near the door by merely attaching a bracket adjacent the door. Then, wires connecting the socket and switch can be placed where desired and even attached along the ceiling out of the way in a conventional conduit.

Description:
FIELD OF THE INVENTION 
     This invention relates to the field of light switches. More particularly, this invention enables a standard light socket to be converted to a self-contained light switch unit that is responsive to activation of a closure, for example, opening of a door. 
     BACKGROUND OF THE INVENTION 
     This invention involves a closure controlled light switch unit that can be used to easily modify an existing pull string light fixture into one that is operated upon the closing and opening of a door or other closure. The device of the invention can be built into new construction or provided as a kit which can be retrofitted to existing structures. 
     Conventional closets have either no light within the closet or a pull string light fixture, which is activated by pulling a string or chain to turn the light switch on and off. This requires action by the individual once the closet door has been opened. An individual must step into a dark closet to turn the light switch on and remember to turn the light switch off when leaving. 
     There are some walk-in closets which may contain lighting fixtures activated by a wall switch. These lights may be turned on and off without walking into the closet but require an individual to remember to operate the switch so as not to leave the light on once the door is closed. 
     It may be possible to take an existing pull string light fixture and rewire it to provide a light switch that is activated by the closing and opening of a door. However, this rewiring is not easy, is expensive and usually cannot be done by the average consumer. 
     The present invention overcomes these and other disadvantages in a manner not revealed in the known prior art. 
     Applicant is aware of the following U.S. Patents, the disclosures of which are incorporated by reference herein: 
     U.S. Pat. No. 1,625,456 
     U.S. Pat. No. 2,122,293 
     U.S. Pat. No. 2,238,630 
     U.S. Pat. No. 2,331,564 
     U.S. Pat. No. 2,418,905 
     U.S. Pat. No. 2,486,909 
     U.S. Pat. No. 2,636,091 
     U.S. Pat. No. 2,717,933 
     U.S. Pat. No. 2,788,407 
     U.S. Pat. No. 2,835,760 
     U.S. Pat. No. 4,872,095 
     SUMMARY OF THE INVENTION 
     This invention provides a light switch unit, particularly a closet light switch, that is activated by the closing and opening of a closet door and can be adapted to an existing pull string light fixture. The invention provides a mechanical extension socket with male and female light receptacles with its terminals connected to a separate switch. 
     It is an object of this invention to provide a closet light switch that can be installed by an unskilled individual in approximately five minutes. 
     It is a further object of this invention to provide a closet light switch that can be easily adapted to a standard pull string light fixture. 
     It is another object of this invention to provide a closet light switch that is energy efficient because the light is turned off automatically when the closet door is closed. 
     This invention uses existing power, therefore, requiring no additional wiring. 
     The light switch of this invention helps prevent fire hazards because, when the closet door is closed, the light is off, therefore, items near the light bulb will not catch on fire from the heat of the light while the door is closed and a light left on. 
     It is an object of this invention to provide a more convenient light fixture that does not require an individual to search in the dark for a pull string to turn on the light. 
     It is an object of this invention to provide a switch unit kit that can be retrofitted to existing structures. 
     It is a further object of this invention to provide a kit comprised of a switch and a socket adaptor that can be used in any conventional closet light socket. 
     It is also an object of this invention to provide a kit for hinged closet doors and sliding closet doors. 
     It is an object of this invention to provide a kit including a switch, a socket adaptor and wires extending therebetween to provide an all inclusive kit for the consumer. 
     The closet light switch of the invention is inexpensive to manufacture, simple to use and efficient in operation. Further understanding of the invention may be obtained by reference to the drawings and the description of embodiments included herein. 
    
    
     DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a perspective of a switch and socket combination installed in a standard closet; 
     FIG. 2 is a bottom view of a switch; 
     FIG. 3 is a bottom view of an alternative embodiment switch; 
     FIG. 4 is an exploded perspective view of a switch and socket combination with an existing light fixture shown for environment; 
     FIG. 5 is a cross sectional view of a switch and socket combination; 
     FIG. 6 is a perspective view of a switch; and 
     FIG. 7 is a perspective view of a sensor with the pin shown for environment. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     Referring now by reference numerals to the drawings and first to FIGS. 1 and 4, it will be understood that the combination socket and switch adaptor includes a socket 10 and a switch 40 operatively connected by a conductor such as the wires 90, 92 shown. The socket can be screwed into any conventional light fixture L and the switch can be mounted adjacent either a hinged or sliding door. 
     As can be seen in FIGS. 4 and 5, the socket adapter 10 includes a housing 12 having a lower 14, an intermediate 16 and an upper portion 18. The housing 12 can be formed from any suitable insulating material such as synthetic plastic, ceramic, hard rubber or the like. The housing 12 is generally cylindrical with the upper portion 18 being wider than the intermediate portion 16 which is wider than the lower portion 14. The upper portion 18 of the housing 12 is internally threaded to allow a light bulb to be screwed into the upper portion 18 of the housing as seen in FIG. 1. These threads 20 mate with the threads found at the lower end of a conventional light bulb. 
     As best seen in FIG. 5, there is a first conducting strip 22, or buss, extending from inside the upper housing portion 18 into the intermediate housing portion 16 and then outside the intermediate housing portion 16. This conducting strip 22, or buss, may be in the form of a pliable metal strip. There is a second conducting strip 24, or buss, extending from inside the upper housing portion 18 and terminating inside the intermediate housing portion 16. This second conducting strip 24 has a first portion 26 lying generally flat near the bottom of the upper housing portion in such a manner as to contact the bottom or conducting end of a standard light bulb. 
     As seen in FIG. 5, there is a cover 28 encasing a portion of the intermediate housing 16 and extending to a portion of the lower housing 14. This cover is made from conducting material such as a thin pliable sheet metal, such as copper or copper plated steel. The first conducting strip 22 extends from inside the intermediate housing portion 16 through an aperture 30 in the housing 16 and ends such that it contacts this conducting cover 28. Thus, the cover 28 conducts power between a standard light fixture L and the first conducting strip 22 which touches the threaded, metal end of a standard bulb. 
     There is a third conducting strip 32, or buss, positioned generally within the lower housing portion 14. A portion 34 of the third conducting strip 32 lies generally flat at the bottom end of the lower housing portion 14 forming an end 34 to the housing that contacts the conductors (not shown) within an existing light socket. 
     As demonstrated in FIG. 5, a conductor 90, such as the wire shown, is attached at one end 94 to the second conducting strip 24. There is a second conductor 92, such as the wire shown, attached at one end 96 to the third conducting strip 32. Thus, the socket 10 can be screwed into an existing light fixture L and the third conducting strip portion 34 contacts the light fixture L drawing power and transmitting it to wire conductor 92. Wire conductor 90 transmits power from the switch to the second conducting strip 24 which transfers it from end 26 to the bottom end of a standard bulb (not shown). 
     For hinged doors, the switch 40 may be a plunger type switch such as that shown in FIGS. 2, 5 and 6 and it may include a casing 42, for example formed from plastic. It is preferable to have an insulated casing 42 as opposed to a metal casing when dealing with electrical wiring, but suitable insulated metal casings could also be used. The casing 42 has an opening 50 along one side with an actuating member 44 extending therefrom. The actuating member 44 consists of a pin 46 extending through a hollow member 48 and kept in the outward position by a spring 52. The outermost end of the pin 46 has a generally rounded or flat head 54 for contact against a door. The underside of the head forms a lip 56 that is stopped against the edge 58 of the hollow member 48 when the pin 46 is pushed inwards. 
     As shown in FIGS. 5, 6 and 7, The end 60 of the pin 46 opposite the head 54 is connected to two contact arms 62, 64 which carry a pair of contacts 66, 68. When the pin is in the outermost position, each contact 66, 68 contacts a mating contact portion 70, 72 and the circuit is completed. When pressure is applied to the head of the pin, such as by a door that has been closed, the pin 46 is pushed inwards and the contacts 66, 68 are urged out of contact with the mating portions 70, 72 and the circuit is broken, thereby turning off the light. 
     The contacts 66, 68 are connected to the conducting wires 90, 92 such as by the screws 80, 82 shown. The wires 90, 92 are wrapped around the screws 80, 82 and held in place by screwing the screws into the contacts 66, 68. These wires are normally encased in conduits made from insulated material for safety reasons. These wires 90, 92 and conduits extend between the switch 40 and adaptor socket 10. 
     In general, the moveable contact 66, 68 provided on the contact arms 62, 64 complete an electrical circuit when the door is open. The moveable contact 66, 68 are spaced from their mating fixed contact 70, 72 deactivating the electrical circuit when the door is closed. 
     The switch may be mounted at or near a door frame by a bracket 74, such as shown in FIGS. 1 and 2. The ears 76 of the bracket have an aperture 78 for receiving a fastener such as a screw (not shown). Thus, a switch 40 can be mounted by merely screwing it near a door with the actuating member 44 placed at a distance from the door for activation by the opening and closing of the door. 
     To install the combination socket 10 and switch adaptor 40 in a closet, the user merely has to screw the socket 10 into an existing light socket L and mount the switch 40 adjacent the closet door. The switch 40 should be mounted such that the pin 46 is compressed when the door is closed. The switch 40 can be mounted by screwing the bracket 74 where desired. The wires 90, 92 can be placed anywhere including attaching them along the ceiling out of the way, for example, in a conventional conduit. 
     In an alternative embodiment of the invention, the switch 140 is adapted for use with sliding doors, as shown in FIG. 3. A lever 198 is fixed at one end to the fastening bracket 174 and extends across the pin 146 coming into contact with the head 154 of the actuating pin 146. The outermost end of the lever 198 is positioned adjacent the sliding door so that when a door is slid closed, pressure is applied to the lever 198, thus urging the actuating pin 146 inwards. 
     All of the invention has been described by making detailed reference to preferred embodiments. Such detail should be understood by those skilled in the art as instructive rather than in any restrictive sense. Many other variants are possible within the scope of the claims hereunto appended. The invention is not to be limited to the specifics as shown here for purposes of illustration but only by the scope of the appended claims and their equivalents.