X-contact device for bladed shutter

Details X-contact device for bladed shutter X-contact device for bladed shutter

1977-02-14

1978-10-03

Gonzales, John

354230, 354260, G03B 1503

Patent

active

041187210

ABSTRACT:
An X-contact device for a programmed shutter or a shutter of the type in which shutter blades also serve to determine a diaphragm aperture comprises means for detecting an end of a maximum opening period of the shutter, and an X-contact switch adapted to be closed by the detecting means. The switch, when closed, initiates an illumination of a strobo unit and the end of the maximum shutter opening period in order to provide a supplementary exposure added to a natural light exposure which has been maintained until that time.

REFERENCES:
patent: 3309978 (1967-03-01), Kiper
patent: 3994007 (1976-11-01), Uchiyama et al.

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