Automatic control switch for an electric motor
AssigneeGerard Kelly
InventorsGerard Kelly, Bernard Forrester
Life of this patent
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Abstract
A simple and economical mechanism providing automatic motor control. The mechanism includes a motor-rated relay directly connected to line voltage and the input terminal of a motor winding, and receiving a signal from a sensing device connected to line voltage and to a signal input on the relay. The relay and sensing device may be housed within a waterproof enclosure, or may be separately housed within a connection enclosure and a separate sensing device enclosure remote from the connection enclosure, the two enclosures being connected by a cable. The sensing device triggers the relay to control the supply of current to the motor winding.
Claims14
A control mechanism for an electric motor, the motor including a motor winding and having a motor input terminal coupled to one end of the winding for supplying current to the winding and a motor output terminal coupled to the other end of the winding, the mechanism comprising:
- a motor-rated relay, the relay having a signal input terminal for receiving an input signal, a neutral terminal, a voltage input terminal for connection to line voltage, and a voltage output terminal connected to the motor input terminal, the voltage input terminal being selectively connected to the voltage output terminal in response to the input signal;
- and
- a sensing device having a sensor input terminal and a sensor output terminal, the sensor input terminal being directly connected to the voltage input terminal and the sensor output terminal being directly connected to the signal input terminal.
A pump for a pool having an automatic control system, comprising:
- a pump;
- a fractional horsepower electric motor operatively coupled to the pump for providing energy to the pump, the motor including a motor winding and having a motor input terminal coupled to one end of the winding for supplying current to the winding and a motor output terminal coupled to the other end of the winding;
- a motor-rated relay, the relay having a signal input terminal for receiving an input signal, a neutral terminal, a voltage input terminal for connection to line voltage, and a voltage output terminal connected to the motor input terminal, the voltage input terminal being selectively connected to the voltage output terminal in response to the input signal;
- and
- a sensing device having a sensor input terminal and a sensor output terminal, the sensor input terminal being directly connected to the voltage input terminal and the sensor output terminal being directly connected to the signal input terminal.
Dependencies are inferred from the claim text.