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:
Oct. 02, 1984
Filed:
May. 27, 1984
Applicant:
Inventor:
Fukashi Yoshizawa, Tatsuno, JP;
Assignee:
Olympus Optical Co., Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05B / ;
U.S. Cl.
CPC ...
318334 ; 318331 ; 3183 / ;
Abstract
A speed control apparatus for d.c. motor includes a bridge circuit formed by the motor and a plurality of resistors. A branch of the bridge circuit which is located opposite to a branch defined by the motor comprises a resistor circuit including a thermistor, thereby achieving a speed control having a reduced temperature dependency.