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:
Jul. 10, 1984
Filed:
May. 19, 1982
Applicant:
Inventor:
Ryuji Tokuda, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01F / ; H01F / ; H01F / ; G03B / ;
U.S. Cl.
CPC ...
335217 ; 354464 ; 3542351 ;
Abstract
In the disclosed driving circuit for a coil, particularly for driving a coil in a device such as a camera whose shutter blades are driven with electro-magnetic force generated by a current flowing through the coil and a magnetic field in which the coil is positioned, a voltage approximately proportional to the absolute temperature is applied across the terminals of the coil so as to produce temperature compensation of the coil current.