Camera power supply maintaining circuit

Details Camera power supply maintaining circuit Camera power supply maintaining circuit

1978-09-29

1981-02-10

Chatmon, Jr., Saxfield

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307294, 354 51, 354 60R, 328 77, 328146, H03K 513, H03K 5159

Patent

active

042504139

ABSTRACT:
A power supply maintaining circuit in a camera having an electric source, and a power switch provided between the electric source and a shutter control circuit or a display circuit. The power supply maintaining circuit comprises a timer circuit connected in parallel to the shutter control or display circuit and a transistor is connected in parallel to the power switch. The transistor is controlled by the timer circuit.

REFERENCES:
patent: 3654494 (1972-04-01), Bartlett et al.
patent: 3808466 (1974-04-01), Campbell
patent: 3970874 (1976-07-01), Kawasaki
patent: 4053790 (1977-10-01), Myers
patent: 4104547 (1978-08-01), Frederiksen et al.

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