Control circuit for power supply associated with an electronic f

Details Control circuit for power supply associated with an electronic f Control circuit for power supply associated with an electronic f

1981-09-16

1984-04-24

Perkey, William B.

3541451, G03B 1505

Patent

active

044444834

ABSTRACT:
A control circuit for a power supply associated with an electronic flash unit prevents a wasteful power dissipation of a power supply cell which is internally housed within an electronic flash unit, by automatically interrupting the operation of a voltage booster contained within the electronic flash unit in response to an output from a timer circuit which is internally housed within photographic camera whenever the camera is not operated over a given time interval.

REFERENCES:
patent: 3916424 (1975-10-01), Prochnow
patent: 4001640 (1977-01-01), Biber
patent: 4007469 (1977-02-01), Land et al.
patent: 4281917 (1981-08-01), Kitagawa et al.

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