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:
Jun. 09, 1998
Filed:
Oct. 05, 1995
Applicant:
Inventors:
Tatsuo Amanuma, Saitama-ken, JP;
Toru Kosaka, Kanagawa-ken, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P / ;
U.S. Cl.
CPC ...
318103 ; 318112 ; 396406 ; 396410 ;
Abstract
A film driving circuit that is capable of normal driving and reverse driving to drive-control a first motor and a second motor each rotating in only one direction. The motor driving circuit is structured so the first motor driving and the second motor driving is controlled by four switching elements composing a bridge circuit. The first motor connects to the connecting points of two of the switching elements. The second motor connects to the connecting points of the other two of the four switching elements. A CPU controls the first motor and the second motor by controlling the on-off status of the four switching elements.