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:
Aug. 04, 1987
Filed:
Mar. 04, 1986
Applicant:
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354400 ;
Abstract
This patent application discloses a device for driving the photographic optical system of the camera in which a switch for detecting when the photographic optical system reaches an initial position is made responsive to the moved position of cam means that controls the axial position of the optical system, and the phase of the optical system with the switch is made delayed in relation to the phase of the optical system with the cam means, thereby an improvement of accuracy is achieved.