Warning device for a camera

Details Warning device for a camera Warning device for a camera

1976-03-15

1978-06-13

Adams, Russell E.

354 23D, 354 53, G03B 700, G03B 1720

Patent

active

040952436

ABSTRACT:
The warning device for a camera has an operation circuit for determining proper exposure condition of the shutter time according to the informations of the brightness of the object, the diaphragm aperture of the objective and the film sensitivity, a manually operable circuit for manually setting the condition of the shutter time and an optical indicating circuit operated by the manually operable circuit for digitally indicating the condition of the shutter time set by the manually operable circuit. The warning device comprises a coincidence detecting circuit with its inputs connected to the output of the operation circuit and the manually operable circuit, respectively, and with its output connected to one of the inputs of a gate circuit, and an oscillator with its output connected to the other input of the gate circuit, the output of the gate circuit being connected to the optical indicating circuit, thereby causing winking of the optical indication of the optical indicating circuit until the output of the manually operable circuit reaches that of the operation circuit.

REFERENCES:
patent: 3956758 (1976-05-01), Numata et al.
patent: 3967288 (1976-06-01), Yamamoto

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