Auto-strobe means for cameras

Details Auto-strobe means for cameras Auto-strobe means for cameras

1975-05-27

1977-05-17

Adams, Jr., Russell E.

354 34, 354127, 354139, 354145, 354149, G03B 716

Patent

active

040245497

ABSTRACT:
An auto-strobe flash means for cameras which comprises a variable resistor inserted in a light measuring circuit of an electronic exposure time controlling arrangement for a shutter, the resistance value being a function of the photographing distance. A main flash discharge tube is ignited when the shutter is fully opened, and a differential amplifier is provided for controlling the shutter closing time in response to the value of the variable resistor.

REFERENCES:
patent: 3682056 (1972-08-01), Tokutomi
patent: 3742828 (1973-07-01), Nakajima et al.
patent: 3757654 (1973-09-01), Mori
patent: 3805278 (1974-04-01), Matsuzaki et al.
patent: 3840882 (1974-10-01), Kawasaki

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