The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 29, 1978
Filed:
Jul. 13, 1977
Applicant:
Inventor:
Erwin Scholz, Brunswick, DE;
Assignee:
Rollei-Werke Franke & Heidecke, Brunswick, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354252 ; 354226 ;
Abstract
A focal plane shutter for a photographic camera has a brake system for braking the movement of shutter elements just before they reach their end or stop positions. At least one first brake element has a nearly constant braking torque, and at least one second brake element has a braking torque that increases over the distance of the braking movement. The constant and the increasing braking torques of the first and second braking elements are combined and applied to moving elements of the shutter, and both the constant and the increasing braking torques of the first and second brake elements are independently adjustable and settable.