Electric lamp

Details Electric lamp Electric lamp

1993-08-10

1996-08-27

Lazarus, Ira S.

Illumination

Elongated source light unit or support

With means to accommodate additional circuit element

362265, 31331803, 439613, F21V 2302

Patent

active

055507220

ABSTRACT:
An electric lamp including a light source, a lamp cap having a shell and a base, a housing connected to the light source and to the lamp cap, and a ballast which is electrically connected to the light source for operating the light source and which is arranged at least partly in a space surrounded by the housing and the lamp cap. The lamp cap includes contacts electrically connected to the ballast at least during lamp operation, one of said contacts being provided on the base and a further one on the shell. The further contact is formed by a band of conducting material around the lamp cap, which band directly adjoins the base at one side and adjoins a band of insulating material around the lamp cap at another side. This suppresses the interference generated in the supply mains, due to capacitive coupling between the ballast and the further contact, to a considerable degree.

REFERENCES:
patent: Re18974 (1933-10-01), Smally
patent: 2999220 (1961-09-01), Werner
patent: 3315216 (1967-04-01), Krupp et al.
patent: 4495443 (1985-01-01), Cummings
patent: 4660906 (1987-04-01), Haraden
patent: 4920297 (1990-04-01), Van der Heijden et al.
patent: 4939420 (1990-07-01), Lim
patent: 5032759 (1991-07-01), Thiry et al.

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