Operator motor control

• US 4,045,715 A
• Filed: 06/16/1975
• Issued: 08/30/1977
• Est. Priority Date: 06/16/1975
• Status: Expired due to Term

• Current Assignee: Multi-Elmac Company
• Original Assignee: Multi-Elmac Company
• Inventors: Brackney, Maurice R., Umpleby, Kenneth F.
• Primary Examiner(s): Dobeck, B.
• Application Number:
  US05/587,399
• Time in Patent Office: 806 Days
• Field of Search: 318/288, 318/289, 318/282, 318/466, 318/467, 318/468, 318/16, 318/265, 318/266, 318/207 R, 318/207 A, 318/207 B, 318/207 C, 318/207 K, 318/207 J
• US Class Current: 318/16
• CPC Class Codes: E05F 15/41 Detection by monitoring transmitted force or torque E05F15/48 takes precedence; Safety couplings with activation dependent upon torque or force, e.g. slip couplings
• CPC Class Codes: E05F 15/77 using wireless control
• CPC Class Codes: E05Y 2900/106 for garages
• CPC Class Codes: H02H 7/0851 for motors actuating a movable member between two end positions, e.g. detecting an end position or obstruction by overload signal

Abstract

Control system including radio receiver circuit for a power-driven operator for garage doors and the like comprising an operator control circuit having a regulated DC voltage source operating as a power supply for an electronic flip-flop device responsive to successively applied input signals to 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 and a radio receiver which is responsive to signals from a remote transmitter. The power supply for the flip-flop is also the power supply for the receiver; however, the receiver is packaged separately from the operator and power supply and is readily disconnected for independent maintenance and repair.

Claims

1. A selectively operable reversible power drive for closures which are movable between first and second limits of travel comprising;

a reversible motive power source, first and second switch means for establishing first and second excitation circuits to said motive power source for causing operation thereof in respectively opposite directions, an electronic bistable circuit device having first and second output stages and responsive to successive applications of an input signal to alternately energize said stages, means operatively interconnecting said first and second stages with said first and second switch means, respectively, thereby to complementally control the conditions of said first and second switch means according to the energization of said stages, a regulated DC voltage source interconnected with said bistable electronic device, and selectively actuable signal generating means connected to the bistable circuit device for applying an input signal thereto with each actuation thereof.

2. Apparatus as defined in claim 1 wherein the means connecting the bistable device stages and the first and second switch means comprises first and second relay coils connected to be energized alternately as the output stages are energized, the coils being in operative association with the switch means to to complementally control the conditions thereof.

3. Apparatus is defined in claim 2 further comprising first and second current drivers connected in series circuit with the first and second relay coils respectively having control electrodes thereof directed connected for control by the output stages of the bistable device.

4. Apparatus as defined in claim 1 wherein the motive power means is a reversible electric motor, the first and second switch means each comprising an armature and opened and closed contacts adapted to be alternately engaged by said armature, means connecting the closed contact of each switch means to respective sides of the motor, means connecting the open contact of each switch means commonly to one side of a line voltage source and means electrically interconnecting the armatures whereby should both of said first and second switch means assume the closed condition the line voltage is disconnected from the motor.

5. Apparatus as defined in claim 1 wherein said regulated DC power supply further includes a first control element such as a transistor interconnecting the power supply with both sides of the bistable device and latch means operative interconnecting the signal generating means with the first control element for the latching the first control element on after the signal generating means is actuated.

6. Apparatus as defined in claim 1 wherein the signal generating means comprises a push button.

7. Apparatus as defined in claim 1 wherein the signal generating means comprises a radio signal receiver.

8. Apparatus as defined in claim 7 further including a radio transmitter for activating said radio receiver to apply said input signal to bistable device.

9. Apparatus as defined in claim 7 further including a first housing means supporting the electronic bistable device and having first plug means and a second housing supporting said radio receiver and having a second plug means operatively associable with said first plug means for removably electrically interconnecting the radio receiver with the bistable device during normal operation therein.

10. Apparatus as defined in claim 9 wherein said DC power supply is connected to the radio receiver through said first and second plug means.

11. Apparatus as defined in claim 1 wherein the reversible motor power source is a reversible motor power source is a reversible electric motor having an output shaft, means interconnecting the output shaft with a door having open and closed positions corresponding with said first and second limits of travel.

12. Apparatus as defined in claim 11 further comprising an open limit switch electrically interconnecting the first switch means with one side of the motor and a close limit switch electrically interconnecting the other switch means with the other side of the motor.

13. Apparatus as defined in claim 12 wherein each of said first and second switch means comprises an armature and adjacent open and closed contact means, means connecting the closed contact means of each of the switches to respective sides of the motor, means connecting the open contact means of each switch commonly to one side of a line voltage source and means electrically interconnecting the armatures whereby should both the first and second switch means be closed the line voltage is disconnected from the motor irrespective of the state of the open and closed limit switches.

14. Apparatus for opening and closing garage doors and the like comprising:

a reversible electric motor operable on line voltage from a source;

actuator means for starting the motor;

a motor control circuit including bistable relay means for alternately reversing the application of line voltage to said motor with each operation of said actuator means;

normally non-conducting switch means connected in circuit between the line voltage source and the bistable relay means; and

holding circuit means responsive to operation of said actuator means to hold said switch means conductive only during continuous presence of said line voltage whereby said line voltage is disconnected from said bistable relay means whenever said switch means in non-conducting.