Relay control system for plurality of bidirectional motors

Claim 2

A control system for a plurality of motors each having first and second windings comprising: a like plurality of first switching means respectively associated with said motors; a source of AC voltage having first and second terminals, the first and second windings of each of said motors having a common junction coupled through a respective one of said first switching means to the first terminal of said source of AC voltage; a second switching means having first, second and common terminals, the first terminal of said second switching means being connected to each of said first windings at the opposite end of the winding from said common junction, the second terminal of said second switching means being connected to each of said second windings at the opposite end of the winding from said common junction, and the common terminal of said second switching means being connected to the second terminal of said source of AC voltage; and control means connected to said first and second switching means for controlling said first switching means to selectively connect one of the common junctions of the first and second windings of said motors to the first terminal of said source of AC voltage and for controlling said second switching means to selectively connect the first terminal or the second terminal of said second switching means to the common terminal of said second switching means.

Claim 3

A control system in accordance with claim 1 wherein said motors are bidirectional, and further including a first capacitor connected between the first and second terminals of said second switching means whereby said first capacitor cooperates with one of the windings of each of said motors to form an LC phase shifting network for each of said motors.

Claim 4

A control system in accordance with claim 2 wherein each of said first switching means is normally open and the common terminal of said second switching means is normally closed with its first terminal, whereby closure of one of said first switching means is operative to effect one direction of rotation of the motor coupled thereto, and closure of one of said first switching means together with activation of said second switching means to open the common to first terminal connection and close the common terminal with said second terminal is operative to effect the opposite direction of rotation of the motor coupled to the closed one of said first switching means.

Claim 5

A control system in accordance with claim 3 wherein said control means comprises a plurality of sets of first and second signal detectors each set being associated with a respective one of said motors, and means coupling the outputs of said signal detectors to said first and second switching means whereby activation of one of said first signal detectors is operative to actuate the first switching means coupled to the motor associated with the activated one of said first signal detectors, and activation of one of said second signal detectors is operative to actuate both said second switching means and the first switching means coupled to the motor associated with the activated one of said second signal detectors.

Claim 6

A control system in accordance with claim 4 wherein each of said first switching means comprises a SPST relay having SPST contacts and a coil, said SPST relay contacts including a normally open terminal connected to the common junction of the associated motor windings and a common terminal connected to the first terminal of said source of AC voltage, and said SPST relay coil being coupled to the outputs of one set of said first and second signal detectors, and wherein said second switching means comprises a SPDT relay having SPDT contacts and a coil, said SPDT relay contacts comprising said first, second and common terminals of said second switching means, and said SPDT relay coil being coupled to the outputs of all of said second signal detectors.

Claim 7

A control system in accordance with claim 5 wherein the output of each of said first signal detectors is connected directly to a respective one of said SPST relay coils, and the output of each of said second signal detectors is coupled through a first diode to a respective one of said SPST relay coils and through a second diode to said SPDT relay coil.

Claim 8

A control system in accordance with claim 6 further including a source of DC voltage connected to each of said SPST and SPDT relay coils at the end opposite that coupled to the outputs of said signal detectors, a plurality of second capacitors each connected across a respective one of said SPST and SPDT relay coils, and receiving means for receiving any one of a plurality of control signals of different predetermined frequencies, and wherein each of said signal detectors comprises a transistor having base, collector and emitter electrodes, a source of reference potential, a series resonant circuit connected between said receiving means and said source of reference potential and tuned to selectively respond to one of said control signal frequencies, means coupling said resonant circuit to the base of said transistor, and means coupling the emitter of said transistor to said source of reference potential, the collector of said transistor being the output of said signal detector.

Claim 9

A control system in accordance with claim 5 further including a source of DC voltage connected to each of said SPST relay coils at the end opposite that coupled to the outputs of said signal detectors, a source of reference potential, and a first transistor having base, emitter and collector electrodes, the emitter and collector of said first transistor and said SPDT relay coil being serially connected between said source of DC voltage and said source of reference potential, and wherein the output of each of said first signal detectors is connected directly to a respective one of said SPST relay coils, and the output of each of said second signal detectors is coupled through a diode to a respective one of said SPST relay coils and through a resistor to the base of said first transistor.

Claim 10

A control system in accordance with claim 8 further including a plurality of second capacitors each connected across a respective one of said SPST and SPDT relay coils, and receiving means for receiving any one of a plurality of control signals of different predetermined frequencies, and wherein each of said signal detectors comprises a second transistor having base, collector and emitter electrodes, a series resonant circuit connected between said receiving means and said source of reference potential and tuned to selectively respond to one of said control signal frequencies, means coupling said resonant circuit to the base of said second transistor, and means coupling the emitter of said second transistor to said source of reference potential, the collector of said second transistor being the output of said signal detector.

Claim 11

A remote control system for a television receiver including a plurality of bidirectional motors each connected to control a respective function of the television receiver and each having first and second windings comprising: a plurality of first switching means each associated with a respective one of said motors; a source of AC voltage having first and second terminals, said first and second windings of each of said motors having a common junction coupled to a respective one of said first switching means and each of said first switching means being connected to the first terminal of said source of AC voltage; a second switching means having a first terminal connected to each of said first windings, a second terminal connected to each of said second windings, and a common terminal connected to the second terminal of said source of AC voltage; transmitting and receiving means for providing a plurality of signal frequencies; a plurality of signal detectors connected to said receiving means, each of said signal detectors for providing an output signal in Response to a respective one of the signal frequencies; and means connecting said signal detectors to said first and second switching means whereby the output signals of said signal detectors control said first and second switching means to selectively connect said first and second windings of said motors to said source of AC voltage.

Claim 12

A remote control system for a television receiver including a plurality of bidirectional motors each connected to control a respective function of the television receiver and each having first and second windings comprising: a plurality of first switching means each associated with a respective one of said motors; a source of AC voltage having first and second terminals, said first and second windings of each of said motors having a common junction coupled to a respective one of said first switching means and each of said first switching means being connected to the first terminal of said source of AC voltage; a second switching means having a first terminal connected to each of said first windings, a second terminal connected to each of said second windings, and a common terminal connected to the second terminal of said source of AC voltage; transmitting and receiving means for providing a plurality of signal frequencies; a plurality of signal detectors connected to said receiving means, each of said signal detectors for providing an output signal in Response to a respective one of the signal frequencies; and means connecting said signal detectors to said first and second switching means whereby the output signals of said signal detectors control said first and second switching means to selectively connect said first and second windings of said motors to said source of AC voltage.

Claim 13

A remote control system in accordance with claim 10 wherein said plurality of signal detectors comprises a plurality of sets of first and second signal detectors, each set being associated with a respective one of said motors, and wherein each of said first signal detectors is connected to a respective one of said first switching means for operating the one of said first switching means connected thereto to effect rotation in one direction of the one of said motors associated therewith when the associated one of said first detectors provides an output signal, and wherein each of said second signal detectors is connected to said second switching means for operating said second switching means in response to an output signal from one of said second signal detectors and each of said second signal detectors is further connected to a respective one of said first switching means for operating the one of said first switching means connected thereto to effect rotation in the opposite direction of the one of said motors associated therewith when the associated one of said second detectors provides an output signal.

Claim 14

A remote control system in accordance with claim 10 including a capacitor connected between the first and second terminals of said second switching means whereby said capacitor cooperates with one of the windings of each of said motors to form an LC phase shifting network for each of said motors.