Patent · US Expired

Focal-plane leaf shutter

US4426146A · kind A · utility

0Cited by

3References

3Claims

0Family size

Assignee

VEB Pentacon Dresden Kamera und Kinowerke · DE

Inventors

Rolf Seifert
Hans Zimmet · Dresden, DE
Herbert Welzel · Dresden, DE
Lothar Reschke · Dresden, DE

Key dates

Filing date	Feb 8, 1982
Grant date	Jan 17, 1984
Priority date	—
Expiry date	Feb 8, 2002

Classification

Technology area (CPC G)Physics
CPC primaryG03B9/18
WIPO fieldOptics
WIPO sectorInstruments

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.