Geometrical instruments
Patent
1978-06-05
1980-01-15
Abrams, Neil
Geometrical instruments
29764, 339154L, H01R 1720, H01R 3106, H01R 4300
Patent
active
041836049
ABSTRACT:
An adapter for a conventional threaded electric light socket or the like having an external right hand threaded base for threading into a conventional socket. A locking tab on the base permits the adapter to be threaded into the socket and jams the threads of the socket to prevent its removal. The adapter has a cavity with an internal left hand thread for receiving an unconventional bulb or the like with a mating left hand threaded base. In one form, the adapter has a releasable lock structure for holding the adapter in the socket. A removal tool is used to release the lock structure to permit the adapter to be turned into and out of the socket.
REFERENCES:
patent: 1082397 (1913-12-01), Blass
patent: 1621341 (1927-03-01), Vogt
patent: 1648916 (1927-11-01), Schmidt, Jr.
patent: 2129379 (1938-09-01), Mollan
patent: 2194329 (1940-03-01), Sokoloff
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