Opening and closing device for camera shutter

Details Opening and closing device for camera shutter Opening and closing device for camera shutter

1976-08-06

1978-03-28

Gonzales, John

354249, 354266, G03B 940

Patent

active

040818101

ABSTRACT:
In a camera having an aperture and a shutter of the type having opening blades and closing blades operable sequentially to make an exposure, an opening member for actuating the opening blades is releasably coupled to a driving member which is spring biased in a direction to move the opening blades to open position to initiate an exposure. A spring bias is also applied to a closing member for actuating the closing blades in a direction to close the camera aperture and thereby terminate the exposure. As the closing blades approach closed position, the closing member actuates the connecting member so as to release the opening member from the driving member and also engages the opening member so as to move it in a direction to return the opening blades toward set or aperture-closing position. The opening blades are thereby moved at least partially toward closed position as the closing blades complete their closing movement and the transfer of energy from the closing member to the opening member serves to decelerate the closing blades at the end of their movement and thereby reduce impact.

REFERENCES:
patent: 3810224 (1974-05-01), Kitai et al.
patent: 3829878 (1974-08-01), Onda et al.
patent: 3999196 (1976-12-01), Inoue

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