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:
Aug. 24, 1993
Filed:
Oct. 18, 1991
Stuart S Hash, Fort Wayne, IN (US);
Xolox Corporation, Fort Wayne, IN (US);
Abstract
This invention relates to a speed control circuit for an electric motor. It includes a controller having a plurality of input circuits and an output circuit adapted to be connected to one of a plurality of direct current motors. The controller includes means responsive to an alternating signal on a selected one of said input circuits for generating and maintaining a unidirectional motor-energizing voltage of predetermined magnitude in the output circuit whereby the speed of said one motor may be controlled. The controller further includes Hall cell devices coupled to a plurality of motors, respectively, for generating the alternating signal in response to energization of a selected motor.