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, 1976
Filed:
Mar. 25, 1975
George Rudich, Jr, Goshen, IN (US);
Johnson Controls, Inc., Milwaukee, WI (US);
Abstract
An integral motor controller circuit for supplying variable speed, bidirectional drive to a motor as a function of variations of a sensed parameter includes an amplifier circuit which is responsive to an error signal indicative of deviations of the parameter from a set point to provide an output signal representing the direction and amount of the deviation. The amplifier output signal is applied to a first motor terminal and to an input of a two-level comparator circuit which is responsive to an increasing error signal exceeding a predetermined amount to connect an energizing potential of one polarity to a second motor terminal and responsive to a decreasing error signal in excess of the predetermined amount to connect an energizing potential of the opposite polarity to the second terminal of the motor, the speed of the motor being determined by the level of the amplifier output signal. The motor controller is described with reference to an application in an environmental control system to effect positioning of a damper located in an air duct for supplying heated or cooled air to an area in response to changes in the air temperature in the area.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile