Automatic swimming pool freeze protector

Claim 2

A water circulating device for a swimming pool comprising, a pump having an intake side and a discharge side; at least one overflow vent in a side of said pool; at least one water supply jet in a side of said pool; means connecting the intake side of the pump to said overflow vent; means connecting the discharge side of the pump to said water supply jet, said overflow vent and said water supply jet being located around the periphery of the pool to create circulatory flow, an electric motor arranged to operate the pump; power supply means; and a temperature sensing device arranged to connect the power supply means to the motor upon being exposed to a predetermined minimum ambient temperature.

Claim 3

The combination called for in claim 1 with the addition of a power transformer between the temperature sensing device and the power supply.

Claim 4

The combination called for in claim 1 with the addition of a relay having contacts therein arranged to be closed by power supplied through the temperature sensing means to connect the power supply to the motor.

Claim 5

The combination called for in claim 3 with the addition of a timer switch in the power supply circuit in series with the motor arranged to actuate the motor at timed intervals.

Claim 6

The combination called for in claim 4 wherein the relay contacts are in parallel with the timer switch.

Claim 7

A water circulatory device for a swimming pool comprising, an overflow vent, a pump having an intake and a discharge side; at least one water supply jet in a side of said pool; means connecting the intake side of the pump to said overflow vent; means connecting the intake side of the pump to said overflow vent; means connecting the discharge side of the pump to said water supply jet, said overflow vent and said water supply jet being located around the periphery of the pool to create circulatory flow, motor to operate the pump; a source of electric power; an electric power circuit between the power source and the motor; a timer switch in the circuit to connect the power source to the motor at timed intervals; a temperature sensor switch; an electric sensor circuit in which the sensor is disposed in series; a relay coil in series in the sensor circuit; a power transformer between the power circuit and the sensor circuit to supply electric power to the sensor circuit; a by-pass circuit connected to the power supply by-passing the timer device and connected to the motor; and contacts in said relay closeable by the relay coil disposed in series in the by-pass circuit to thereby energize the motor when the relay is energized.

Claim 8

A water circulatory device for a swimming pool comprising, an overflow vent, a pump having an intake and a discharge side; at least one water supply jet in a side of said pool; means connecting the intake side of the pump to said overflow vent; means connecting the intake side of the pump to said overflow vent; means connecting the discharge side of the pump to said water supply jet, said overflow vent and said water supply jet being located around the periphery of the pool to create circulatory flow, motor to operate the pump; a source of electric power; an electric power circuit between the power source and the motor; a timer switch in the circuit to connect the power source to the motor at timed intervals; a temperature sensor switch; an electric sensor circuit in which the sensor is disposed in series; a relay coil in series in the sensor circuit; a power transformer between the power circuit and the sensor circuit to supply electric power to the sensor circuit; a by-pass circuit connected to the power supply by-passing the timer device and connected to the motor; and contacts in said relay closeable by the relay coil disposed in series in the by-pass circuit to thereby energize the motor when the relay is energized.