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. 02, 1985
Filed:
May. 27, 1983
Applicant:
Inventor:
Fukashi Yoshizawa, Tatsuno, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G05B / ;
U.S. Cl.
CPC ...
318331 ; 3183 / ; 3183 / ;
Abstract
A speed control apparatus for a d.c. motor includes a bridge circuit which operates to detect a speed error signal. The speed error signal is applied to a Schmidt trigger circuit, an output of which is used to cause a switching operation of a power supply circuit for the motor in order to control the speed thereof. The apparatus minimizes power dissipation and improves efficiency.