Operation control circuitry for electronic flash devices

Details Operation control circuitry for electronic flash devices Operation control circuitry for electronic flash devices

1978-09-25

1980-04-22

Adams, Russell E.

354105, 354109, G03B 1503

Patent

active

041992423

ABSTRACT:
In a system where a single power source battery is commonly used for the oscillation circuit of an electronic flash device and for another circuit, such as a control circuit for energizing a light source for a data recording for a given period of time, the operation of the oscillation circuit is interrupted by a semiconductor switching device in response to a firing of the flash tube of the flash device. The oscillation circuit interruption continues for a predetermined period during which the aforesaid another circuit is operated from the battery. To this end, the semiconductor switch may be controlled by a delay circuit.

REFERENCES:
patent: 3889281 (1975-06-01), Taguchi et al.
patent: 3971049 (1976-07-01), Ohmuri et al.
patent: 4112444 (1978-09-01), Yonemoto et al.
patent: 4130780 (1978-12-01), Ban et al.

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