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:
Sep. 28, 1982
Filed:
Dec. 15, 1980
Applicant:
Inventors:
Takehiko Ohniwa, Chichibu, JP;
Syuichiro Saito, Kawasaki, JP;
Assignees:
Canon Kabushiki Kaisha, Tokyo, JP;
Canon Denshi Kabushiki Kaisha, Saitama, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354234 ; 335222 ; 310 27 ; 310 36 ; 310219 ;
Abstract
A moving coil type electromagnetic driving source designed to obtain reliable contact between slide pieces and current supply brushes for supplying current to the moving coil wherein each slide piece is provided with grooves having two inclined surfaces opposed to each other, with an elastic brush having a circular or semi-circular section being provided for each groove such that the brush is in contact with the groove at two points.