Double-based, double-ended, pinch-sealed electric lamp with inte

Details Double-based, double-ended, pinch-sealed electric lamp with inte Double-based, double-ended, pinch-sealed electric lamp with inte

1996-11-13

1999-08-03

O'Shea, Sandra

Electric lamp and discharge devices

With envelope

Having base and connector

31331807, 313493, 313634, H01J 548, H01J 550, H01J 162, H01J 6304

Patent

active

059329556

ABSTRACT:
To eliminate the necessity of a separate base for a pinch-sealed lamp having a glass bulb, a sleeve (11) made of the same material as the bulb (1) of the lamp, is formed on an extension of the pinch seal (6), the sleeve retaining a contact element (13) secured in the sleeve, for example by molten glass. The contact element (13) extends essentially transverse to a longitudinal axis (A) of the lamp, is recessed within the interior of the sleeve (11) and preferably has a circumference, which is spaced from said axis (A) by circumferentially different distances, optionally in accordance with a mathematical function which, further optionally, is a periodic function, wherein the minimum spacing of the circumference of said contact element from the axis (A) is less than the inner radius of the sleeve (11).

REFERENCES:
patent: 3646387 (1972-02-01), Ayres
patent: 4870316 (1989-09-01), Otani
patent: 5006757 (1991-04-01), Odagaki
patent: 5142195 (1992-08-01), Heider et al.
patent: 5153482 (1992-10-01), Keijser et al.
patent: 5241239 (1993-08-01), Rao
patent: 5424608 (1995-06-01), Juengst et al.

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