Pinch-sealed high pressure discharge lamp, and method of its man

Details Pinch-sealed high pressure discharge lamp, and method of its man Pinch-sealed high pressure discharge lamp, and method of its man

1991-04-04

1992-08-25

Yusko, Donald J.

Electric lamp and discharge devices

With gas or vapor

Having electrode lead-in or electrode support sealed to...

313634, 313332, 445 26, 445 43, H01J 6130, H01J 6136

Patent

active

051421950

ABSTRACT:
A double-ended, double-sided pinch seal discharge lamp has pinch seals at posite ends of a discharge vessel, in which the broad side surfaces of the pinch seal, retaining a molybdenum foil (8) is formed with lateral constrictions or indentations (16) located at the transition zone between the pinch seal and the bulbous or discharge vessel portion (3). Preferably, excess glass material from the side surfaces or ribs (14) formed on the side surfaces of the pinch or press seal is squeezed, in the transition zone, towards the bulb or central region (3) during the pinch sealing process to form reinforcement ribs (17), thereby strengthening the transition zone between the pinch seal (5) and the bulb portion (3) of the lamp.

REFERENCES:
patent: 3205395 (1965-09-01), Buchwald
patent: 3548245 (1970-12-01), Biscoff
patent: 3742283 (1973-06-01), Loughridge
patent: 4396857 (1983-08-01), Danko
patent: 4540373 (1985-09-01), Rothwell et al.
patent: 4686419 (1987-08-01), Block et al.
patent: 4806816 (1989-02-01), de Vrijer
patent: 4850499 (1989-07-01), White et al.
patent: 4859899 (1989-08-01), Keefe et al.
patent: 4891555 (1990-01-01), Ahlgren et al.
General lighting products, Osram; 1991.

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