Electricity: motive power systems – Motor-reversing – Automatic and/or with time-delay means
Patent
1977-12-22
1979-02-27
Macon, Robert S.
Electricity: motive power systems
Motor-reversing
Automatic and/or with time-delay means
318 16, 318256, 318267, 307116, H02P 142
Patent
active
041421370
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.
REFERENCES:
patent: 3551770 (1970-12-01), Isaacs
patent: 3666988 (1972-05-01), Bellis
patent: 3800201 (1974-03-01), Gaul et al.
patent: 3993940 (1976-11-01), Volk, Jr.
patent: 4010408 (1977-03-01), Bailey
patent: 4045715 (1977-08-01), Umpleby et al.
Brackney Maurice R.
Umpleby Kenneth F.
Duncanson Jr. W. E.
Macon Robert S.
Multi-Elmac Company
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