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:
Apr. 01, 1980
Filed:
Jun. 01, 1978
Applicant:
Inventors:
Haruo Ishii, Wako, JP;
Akihiro Arai, Urawa, JP;
Assignee:
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354270 ;
Abstract
A series of spring biased pivoting members are provided for controlling the diaphragm stop-down and mirror retraction operations. The diaphragm stop down occurs prior to mirror retraction in order to allow time for any 'bouncing' of the mechanism to dissipate and the required winding force is relatively low since only a single spring must be overcome in order to set the mechanism.