Infrared reflective lamp with envelope having straight sections

Details Infrared reflective lamp with envelope having straight sections Infrared reflective lamp with envelope having straight sections

1986-04-21

1987-12-22

Boudreau, Leo H.

Electric lamp and discharge devices

With optical device or special ray transmissive envelope

Polarizer or special ray transmission

313114, 313634, H01K 128, H01K 132

Patent

active

047148578

ABSTRACT:
An incandescent electric lamp includes an envelope with a wall having an inner and an outer curved surfaces. An incandescent filament is located within the envelope. A device is provided to connect the incandescent filament to a source of electrical power to cause it to incandesce. The curved inner surface of the envelope is defined by a plurality of interconnecting, substantially flat chord surfaces interposed to each other at an angle.

REFERENCES:
patent: 1621360 (1927-03-01), Falge
patent: 1948516 (1934-02-01), De Vault
patent: 2744210 (1956-05-01), Ferguson
patent: 3259776 (1966-07-01), Wallace
patent: 3369115 (1968-02-01), Yonkers
patent: 4311940 (1982-01-01), Fitzgerald
patent: 4379249 (1983-04-01), Walsh

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