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:
Apr. 30, 1985
Filed:
Jun. 13, 1983
Yoshio Tokuyama, Yokohama, JP;
Victor Company of Japan, Ltd., Yokohama, JP;
Abstract
A D.C. motor driving circuit comprises a first transistor circuit comprising an initial stage transistor and a terminal stage transistor respectively connected in Darlington pairs, for supplying a current to a D.C. motor, coupled between the D.C. motor and a power source, a switching transistor coupled to the initial stage transistor of the first transistor circuit, and a second transistor circuit including a transistor coupled in parallel to the first transistor circuit, for supplying a current to the D.C. motor. The switching transistor is turned ON when applied with a driving signal voltage to put the first transistor circuit in an ON state. The current supplied to the D.C. motor decreases as a rotational speed thereof increases after starting of the D.C. motor. The first transistor circuit is turned OFF when the rotational speed of the D.C. motor reaches a speed near its constant normal rotational speed. The D.C. motor is supplied with the current from the second transistor circuit during constant normal rotation thereof.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile