Electric incandescent lamp for operation at line voltage

Details Electric incandescent lamp for operation at line voltage Electric incandescent lamp for operation at line voltage

1987-11-19

1989-07-18

Wieder, Kenneth

Electric lamp and discharge devices

With envelope

Having base and connector

313623, 313315, H01K 138, H01K 140

Patent

active

048496693

ABSTRACT:
The electric incandescent lamp for operation at line voltage has a glass lamp vessel (1) provided with a pinched seal (5), in which a metal foil (9) is embedded, which is connected to an internal current conductor (14) extending to a filament (4). The major surfaces (7, 8) of the pinched seal (5) have above the internal current conductor (14) an embossed part (17, 18), as a result of which a space (23) is present in the pinched seal (5) on either side of said current conductor (14). Depressions (19-23) increase the resistance to pressure of the lamp vessel (1). A discharge arc that can be produced in the lamp extinguishes when the arc has reached the pinched seal (5) if the internal current conductor (14) has a wire diameter of at most 200 .mu.m.

REFERENCES:
patent: 3548245 (1970-12-01), Biscoff

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