Method and apparatus for controlling the temperature of low pres

Details Method and apparatus for controlling the temperature of low pres Method and apparatus for controlling the temperature of low pres

1976-03-22

1978-07-18

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

With load device temperature modifier

Electric heater for the load device

315117, 355 69, H05B 4136

Patent

active

041018079

ABSTRACT:
A low pressure metal or metal halide vapor lamp for photocopying applications. The low pressure sodium vapor lamp is operated in a continuous mode and provides illumination of increased brightness and of a color (yellow) which is optimum for providing a copy which is an accurate representation of the original. An auxiliary heater is formed on the lamp to both decrease the warm-up time of the lamp and to control lamp temperature for optimum light output, an electrical control circuit being coupled to the heater to control the current therethrough.

REFERENCES:
patent: 2113314 (1938-04-01), Brueckmann
patent: 2491881 (1949-12-01), Van Liempt
patent: 2581959 (1952-01-01), Koehler
patent: 3296488 (1967-01-01), Taylor
patent: 3432232 (1969-03-01), Tompkins
patent: 3914649 (1975-10-01), Hug

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