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:
Mar. 16, 1982
Filed:
Nov. 12, 1980
Dieter Rossmann, Aalen, DE;
Carl Zeiss-Stiftung, Oberkochen, DE;
Abstract
A diaphragm for photographic cameras and the like, of the type where the diaphragm closes down rapidly from a wide open aperture for viewing to a preselected smaller aperture for picture taking, immediately prior to the actual exposure. The usual slotted ring connected to the diaphragm leaves or blades is stopped in its running down movement by contact with an interception ring whose position is determined by a diaphragm presetting member, the contact between the interception ring and the presetting member including a resiliently displaceable ball. As the slotted ring runs down, it is stopped by impact with the interception ring, which absorbs some of the kinetic energy of the slotted ring, and the resiliently mounted ball connection with the position determining lever (stationary at this time) allows the interception ring to move slightly further beyond the position to which it has been preset, thus bringing the moving parts to a smooth cushioned stop and effectively damping any rebound or bounce which might otherwise occur as a result of quickly stopping the fast running down movement of the diaphragm.