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:
Feb. 27, 1979
Filed:
Dec. 22, 1977
Kenneth F Umpleby, Ann Arbor, MI (US);
Maurice R Brackney, Warren, MI (US);
Multi-Elmac Company, Novi, MI (US);
Abstract
A control system for a power driven operator for garage doors and the like comprising an operator control circuit having a DC voltage source operating as the power supply for an electronic flip-flop device responsive to successively applied input signals to alternatively establish circuits of opposite direction through a reversible electric motor; i.e. one actuation causes the motor to run in one direction and the next actuation causes it to run in the opposite direction. The operator is subject to actuation by both a hard wired push button or an auxiliary device such as a radio receiver which is responsive to signals from a remote transmitter. The operator control circuit includes a feature which electronically prevents the simultaneous energization of the reversible electric motor in both directions. A further feature is a provision for de-energizing the operator motor control circuit relays after a period during which no actuation occurs, or after an interruption of the line voltage, the interruption being caused by a thermal switch or by external means. Still another feature is a provision to energize external devices such as garage lights for a period following actuation of the motor control.