Intervals timer for cameras

Details Intervals timer for cameras Intervals timer for cameras

1981-07-02

1983-07-12

Perkey, William B.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

354289, 307600, 328 73, 3281291, G03B 1738, G03B 1718, H03K 1153

Patent

active

043927335

ABSTRACT:
An interval timer periodically provides a release signal output to a camera for controlling photographic operation by carrying out one exposure cycle and a successive automatic film winding operation. The interval timer provides circuitry for setting the interval between the occurrence of the successive release signals and includes first and second terminals adapted to be connected with the camera, the release signal being transmitted to the camera through the first terminal. Circuitry within the interval timer is responsive to a first reply signal transmitted from the camera at the second terminal for examining the time of the arrival of the first reply signal at the second termial to determine whether or not the time falls into a predetermined condition for controlling the operation of the interval timer circuitry for periodically producing the release signal.

REFERENCES:
patent: 4054888 (1977-10-01), Kozuki et al.
patent: 4086603 (1978-04-01), Kozuki et al.

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