Lamp socket attachment

Claim 1

A lamp socket attachment to convert a conventional screw-type light bulb socket into a spring insert type socket which attachment comprises: a hollow cylindrical member open at both ends made of electrically non-conductive material, a transverse partition made of electrically non-conductive material located approximately at the middle of said member dividing it into upper and lower cup-like compartments, a cylindrical plug made of electrically non-conductive material fixed concentrically in said lower compartment, the length of said plug being slightly greater than the depth of said lower compartment, a bore centrally through said plug and said partition, a contact member made of electrically conductive material positioned in said bore, said contact member comprising a spiral spring, a first screw threaded into one end of said spring and a second screw threaded into its other end, the heads of said screws being larger than the diameter of said bore whereby said contact member is captive within said bore, said contact member being adjustable in length by threading said screws inwardly or outwardly of said spring, a first conductor member made of electrically conductive material having a lower portion extending along the outside of said plug through said partition and an upper portion extending along the inside surface of said upper compartment, said conductor member being structured so said lower portion will engage the threads of said screw-type light bulb socket when said plug is inserted into said socket and said upper portion will engage the threads of a conventional screw base light bulb inserted into said upper compartment of said lamp socket attachment.