Electrical lamp with a screw base formed by identical halves

Details Electrical lamp with a screw base formed by identical halves Electrical lamp with a screw base formed by identical halves

1986-08-28

1987-11-10

Moore, David K.

Electric lamp and discharge devices

With envelope

Having base and connector

313315, 445 22, 439615, H01J 548, H01J 550

Patent

active

047059842

ABSTRACT:
An electric lamp has a lower bowl portion formed as two semicircular halves, over part of which an Edison lamp cap is screwed. The two bowl halves have identical helical rib portions, the cross-section of each rib portion having a height and length selected so that the lamp cap thread fits over them, engaging top edges of ribs on one bowl half and the lower edges of the ribs on the other bowl half.

REFERENCES:
patent: 3875628 (1975-04-01), Evans
patent: 4028577 (1977-07-01), Gates et al.
patent: 4157486 (1979-06-01), Fegley
patent: 4365396 (1982-12-01), Baba et al.
patent: 4383200 (1983-05-01), Van Zon et al.
patent: 4496874 (1985-01-01), Sanders et al.

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