Continuous automatic starting assist UV circuit for microwave po

Details Continuous automatic starting assist UV circuit for microwave po Continuous automatic starting assist UV circuit for microwave po

1976-07-14

1977-10-11

Chatmon, Jr., Saxfield

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Induction-type discharge device load

315267, 315344, 315151, 315158, 250372, 250504, H05B 4116, H05B 4124

Patent

active

040538141

ABSTRACT:
A starting assist control circuit for an electrodeless light source in which a UV source for assisting in starting an electrodeless lamp is coupled in series with the DC supply for a microwave power source for the lamp so that a reduced DC voltage is supplied to the microwave power source at lamp starting. An electronic circuit is provided which continuously decreases the DC current through the UV source and increases the DC voltage for the microwave power source in relation to the amount of light generated by the electrodeless lamp. More specifically, the emitter and collector of a transistor are coupled across the UV source to provide a shunt path and the potential of the base of the transistor is controlled by a photosensitive resistor which senses the amount of light from the lamp. As the lamp generates increased light, the transistor becomes more conductive, thereby continuously decreasing current to the UV source and increasing voltage to the microwave power source.

REFERENCES:
patent: 3142758 (1964-07-01), Dietz
patent: 3196312 (1965-07-01), Marrison
patent: 3227923 (1966-01-01), Marrison
patent: 3258758 (1966-06-01), Byrd
patent: 3377507 (1968-04-01), Riebs
patent: 3497767 (1970-02-01), Guillon et al.
patent: 3636357 (1972-01-01), Del Zotto
patent: 3873884 (1975-03-01), Gabriel

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