Light trap for arc lamp ventilating system

Details Light trap for arc lamp ventilating system Light trap for arc lamp ventilating system

1990-01-22

1990-11-27

Lazarus, Ira S.

Illumination

Light source and modifier

Carbon arc type

362294, 362373, E21V 2900

Patent

active

049741322

ABSTRACT:
The trap is used to allow the high flow of ventilation air through an exhaust opening in the housing of a large arc lamp, while at the same time preventing the escape of light through this opening, and most particularly eliminating the escape of ultraviolet light. The trap is box-shaped, and fits over the ventilation openings in the top and bottom of the arc lamp housing, with each side of the box being comprised of a honeycomb panel coated with a flat black high-temperature light-absorbing material, and the top rectangular honeycomb panel having an opaque sheet passing across its top.

REFERENCES:
patent: 1758290 (1930-05-01), McCormack
patent: 2279920 (1942-04-01), Howell
patent: 2287328 (1942-06-01), Rose
patent: 2307302 (1943-01-01), Richardson
patent: 2368781 (1945-02-01), Rose
patent: 2618738 (1952-11-01), Foulds
patent: 4658338 (1987-04-01), Bertozzi
patent: 4692844 (1987-09-01), Galerne

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