Electronic flash inhibit arrangement

Details Electronic flash inhibit arrangement Electronic flash inhibit arrangement

1978-06-21

1979-07-31

Gellner, Michael L.

354145, 354195, G03B 310, G03B 1505

Patent

active

041628365

ABSTRACT:
Electronic flash apparatus for a camera having automatic focusing with sonic ranging has a charge control system which inhibits charging of the flash tube capacitor during at least the automatic focusing operation of the camera. The flash apparatus thus schedules capacitor charging to occur at times other than the sonic ranging for automatic focusing, and thereby avoids the likelihood that spurious radiation from the capacitor-charging oscillator interferes with the sonic ranging operation.

REFERENCES:
patent: 3522764 (1970-08-01), Biber et al.
patent: 3810212 (1974-05-01), Biber
patent: 3846812 (1974-11-01), Biber
patent: 4001639 (1977-01-01), Biber
patent: 4064519 (1977-12-01), Kee
patent: 4068151 (1978-01-01), Harrison
U.S. patent application Ser. No. 729,289.
U.S. patent application Ser. No. 729,392.

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