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:
Feb. 17, 1987
Filed:
Jun. 05, 1985
Applicant:
Inventor:
Masahisa Fujino, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
3542341 ;
Abstract
An electro-magnetically driven shutter is arranged to make an exposure by driving shutter blades to travel with driving members with power supply effected to an electro-magnetic drive source and to cut off the power supply upon completion of the travel of the shutter blades. The shutter blades are kept in their travel completed positions by locking the driving members with spring members and then, in response to a film winding action, the driving members are unlocked by pushing back the driving members in a travel starting direction with the shutter blades being brought by inertia back to their travel start positions respectively.