Focal-plane leaf shutter

Details Focal-plane leaf shutter Focal-plane leaf shutter

1982-02-08

1984-01-17

Mathews, A. A.

354249, G03B 936, G03B 918

Patent

active

044261462

ABSTRACT:
A focal-plane leaf shutter for photographic cameras, comprises an opening group of leaves and a closing group of leaves, each group having a main leaf which forms a parallelogram linkage with a pair of carrier levers, and secondary leaves. The main leaves serve to define an exposure aperture. The carrier levers are mounted by means of stationary pivot journals on a plate at one short side of the exposure aperture and the main leaves are pivotally connected by means of bearing journals to the free ends of the carrier levers. The secondary leaves are connected with the carrier levers at intervals between the pivot journals and the bearing journals. The two innermost carrier levers forming parallelogram linkages with the main leaves are mounted on a common pivot journal.

REFERENCES:
patent: 3842429 (1974-10-01), Kitai et al.
patent: 3854144 (1974-12-01), Onda et al.
patent: 4231650 (1980-11-01), Saito et al.

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