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:
Nov. 03, 1981
Filed:
May. 02, 1980
Applicant:
Inventor:
Haruo Ishii, Wako, JP;
Assignee:
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354242 ; 354244 ;
Abstract
A single-pivot type focal-plane shutter mechanism having a reduced size and correspondingly increased angle of rotation of the top and bottom curtain drums. The top and bottom curtain drums are provided with protrusions extending in opposite directions. An engaging ring is disposed between the top and bottom curtain drums rotatably mounted on the same shaft. The engaging ring has protrusions extending from opposite sides thereof which engage, upon rotation of the drums, with the protrusions on the top and bottom curtain drums. With this structure, the top and bottom curtain drums can rotate through angles of approximately 600.degree..