Light bulb base having an enlarging external thread

Details Light bulb base having an enlarging external thread Light bulb base having an enlarging external thread

1997-12-01

1999-11-23

Patel, Nimeshkumar D.

Electric lamp and discharge devices

With envelope

Having base and connector

31331804, 31331808, 439615, 439614, 439613, 439611, H01J 6100

Patent

active

059906065

ABSTRACT:
An improved electrically conductive light bulb base for use with common threaded light bulb sockets currently widely used. The improvement combines a substantial reduction in the amount of thread required, by employing a shorter thread that enlarges or increases in size, in radius, or both. This type of thread is in place of the standard thread in securing the bulb in the socket. Optionally, short portions of thread may be provided on one side of a generally cylindrical, smooth base. The particular advantage is that the bulb inserted by hand can be inserted and secured or released and removed with a minimum number of turns of the wrist.

REFERENCES:
patent: 2198934 (1940-04-01), Davis et al.
patent: 2683865 (1954-07-01), Beck
patent: 2919422 (1959-12-01), Ross et al.
patent: 3676835 (1972-07-01), Holly
patent: 3952785 (1976-04-01), Werner
patent: 4068554 (1978-01-01), Hirabayashi
patent: 4778409 (1988-10-01), Maddock
patent: 5600198 (1997-02-01), Meade et al.

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