Electric lamp with low torque threaded base

Details Electric lamp with low torque threaded base Electric lamp with low torque threaded base

1991-12-16

1993-08-31

Yusko, Donald J.

Electric lamp and discharge devices

With temperature modifier

Double wall, jacket or casing for envelope

313318, 439615, H01J 188, H01J 6134, H01J 6136, H01J 550

Patent

active

052412385

ABSTRACT:
A double envelope electric lamp having an outer envelope, support frame, inner capsule, threaded base, center contact, is disclosed. The support frame is formed with hooked ends that lie in shall grooves formed through the threads formed on the lamp neck. The exterior arms abut the metal base when the metal base is threaded onto the outer envelope. By making the exterior arms with a heavy wire, the positioning accuracy may be increased, and surprisingly, the threading torque may be reduced.

REFERENCES:
patent: 1650289 (1927-11-01), McGinley
patent: 2142072 (1938-12-01), Asmussen et al.
patent: 4020382 (1977-04-01), Bolt et al.
patent: 4604553 (1986-08-01), Kosmach
patent: 4647809 (1987-03-01), Blaiodell et al.
patent: 4779021 (1988-10-01), Haraden
patent: 4816977 (1989-03-01), Sorensen

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