Shutter blade device for focal plane shutter

Details Shutter blade device for focal plane shutter Shutter blade device for focal plane shutter

1980-04-23

1981-10-13

Griffin, Donald A.

G03B 940

Patent

active

042945321

ABSTRACT:
In a focal plane shutter for a single lens reflex camera having, on the side of the shutter aperture, two blade groups each consisting of a plurality of separate blades adapted to operate sequentially in exposure operation, a shutter blade device includes said two blade groups having at least some of blades formed of thin synthetic resin plates. A shielding member is provided between a reflex mirror and said blade groups and adapted to retract from an aperture shielding position during the exposure operation of said two blade groups and return to an aperture shielding position before and after the exposure operation.

REFERENCES:
patent: 2890638 (1959-06-01), Rentschler
patent: 3502014 (1970-03-01), Atake
patent: 3635142 (1972-01-01), Ataka et al.
patent: 4054891 (1977-10-01), Onda et al.
patent: 4096505 (1978-06-01), Onda et al.

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