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:
Sep. 27, 1977
Filed:
Nov. 10, 1975
Applicant:
Inventor:
Bodo Mielke, Wolfenbuttel, DT;
Assignee:
Rollei-Werke Franke & Heidecke, Braunschweig, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354249 ; 354245 ; 354246 ; 354248 ;
Abstract
Two sets of lamellas are moved across the image aperture in a photographic cameras, whereby the lamellas of each set move in different but parallel planes. Each lamella is coupled to a crank pin and the pins are, on the one hand, guided for movement in parallel paths to move the lamellas of the set colinearly across the aperture while, on the other hand, the crank pins are being moved by a pivoting, slotted lever in which the pins glide. Guiding of the pins may include use of slide tracks or of linear ball bearings for guide elements carrying the pins.