Capped electric lamp

Details Capped electric lamp Capped electric lamp

1991-11-26

1993-07-13

Yusko, Donald J.

Electric lamp and discharge devices

With envelope

Having base and connector

313 51, 439602, 439605, 439612, 439704, 439232, H01J 560

Patent

active

052276902

ABSTRACT:
The lamp has a lamp cap (10) with a metal shell (20), in which an insulator body (30) with a circumferential outer surface (31) between a first and a second end face (32, 33) is locked. Recesses (34) occur at the outer surface (31) at a cross-section (II--II). Between these recesses (34) the outer surface (31) has flattened portions (35), which enable the metal shell (20) to be deformed when the insulator body (30) and the shell (20) are assembled together, and to widen temporarily near the recesses (34). As a result projections (23) in the metal shell (20) can be depressed more deeply than in the case of an outer surface (31) without flattened portions (35). Consequently, the projections (23) press clampingly in the recesses (34) of the outer surface (31), when the metal shell (20) is released, thereby tightly securing the insulator body (30) in the metal shell (20 ).

REFERENCES:
patent: 4714858 (1987-12-01), Sanders
patent: 4816977 (1989-03-01), Sorensen
patent: 4864184 (1989-09-01), Fleming
patent: 5010272 (1991-04-01), Eckhardt et al.

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