Camera controller for flashgun operation

Details Camera controller for flashgun operation Camera controller for flashgun operation

1979-08-02

1981-08-25

Hix, L. T.

354 50, 354127, 354139, 354141, G03B 1503, G03B 1718

Patent

active

042855861

ABSTRACT:
A device for controlling a camera according to whether or not a flashgun is mounted on the camera and whether or not the flashgun is charged. The camera operation may be an electrically controlling an automatic shutter operation or a manual shutter operation. An input terminal transmits a charge signal of the flashgun and a detection switch determines whether or not the flashgun is mounted on the camera. In a first state in which a flashgun with a charge signal terminal is mounted on the camera but the flashgun is not charged yet, the detection switch is turned on or off. A voltage lower than a predetermined value is applied to the input terminal, and an ordinary automatic shutter control or an ordinary manual shutter control is obtained according to information provided by the detection switch and information provided by the input terminal. In a second state in which the flashgun mounted on the camera has been charged, the detection switch is turned on or off, a voltage higher than said predetermined value is applied to the input terminal, and a flash synchronization shutter control is obtained according to information provided by the detection switch and information provided by the input terminal. In a third state in which a flashgun having no charge signal terminal is mounted on the camera, the detection switch is merely turned on or off, the input terminal is in open state, and the X shutter control is obtained according only to information provided by the detection switch.

REFERENCES:
patent: 3675547 (1972-07-01), Uchiyama et al.
patent: 4047194 (1977-09-01), Nakamura et al.
patent: 4079385 (1978-03-01), Nakamura et al.
patent: 4091396 (1978-05-01), Sahara et al.
patent: 4126877 (1978-11-01), Ohtaki et al.

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