Method of making a pinch-sealed, gas-filled incandescent lamp

Details Method of making a pinch-sealed, gas-filled incandescent lamp Method of making a pinch-sealed, gas-filled incandescent lamp

1989-11-29

1991-04-09

Ramsey, Kenneth J.

Electric lamp or space discharge component or device manufacturi

Process

With assembly or disassembly

445 43, 445 32, 65 322, 65 5926, 65 5928, H01J 932

Patent

active

050060880

ABSTRACT:
A method of manufacturing an incandescent lamp which has a tube extending through the pinch seal of the glass envelope both for evacuating the same and for subsequently introducing a halogen gas therein. An envelope blank has its open end portion heated prior to pinch sealing, with a filament mount assembly inserted therein but with the gas exhaust/supply tube not inserted to preclude the possibility of its clogging. Only after the open end portion of the envelope blank has been heated to a viscid state is the gas exhaust/supply tube inserted therein. The envelope blank is pinch sealed immediately thereafter.

REFERENCES:
patent: 2945327 (1960-07-01), Malm et al.
patent: 3265923 (1966-08-01), Preziosi et al.
patent: 4749901 (1988-06-01), Demas

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