Design and cooling of single ended quartz projection lamps

Details Design and cooling of single ended quartz projection lamps Design and cooling of single ended quartz projection lamps

1996-06-28

2000-01-04

Patidar, Jay

Electric lamp and discharge devices

With gas or vapor

Incandescent filament lamp

31331805, 31331807, 31331808, H01K 150

Patent

active

060113537

ABSTRACT:
This invention consists of an improved design and assembly process the for manufacture of a single ended quartz (SEQ) lamp for projection applications. The lamp (A) includes a hermetically sealed envelope (10) which houses a filament (15). A ceramic base (12) receives the envelope in a receiving slot (26). Cement fill in the slot, around the hermetic seal, bonds the envelope to the base. Ends (18,20) of the filament extend into the seal region (22) and are electrically connected to a power source by three-part leads (14,16). This invention consists of a much simpler two-pin prefocus ceramic base SEQ lamp design that is made with fewer parts and is much easier and faster to assemble to enable much reduced labor and cost. Also, the ceramic base is smaller and exposes more of the quartz lamp seal to the surroundings to enable more effective cooling during lamp operation to prevent lamp failures from overheated seals. Also, the ceramic base is designed for quick assembly with the coil correctly focused to the base.

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patent: 3885149 (1975-05-01), Wolfe et al.
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patent: 4243907 (1981-01-01), Kohl et al.
patent: 4287448 (1981-09-01), Bradley
patent: 4568854 (1986-02-01), Westlund, Jr. et al.
patent: 4785218 (1988-11-01), Kohl et al.
patent: 4985656 (1991-01-01), Westlund, Jr. et al.

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