초록 ▼

Control apparatus for controlling the operation of a gas valve in a gas heating system which includes thermostatic switch means and a source of AC voltage which are connected to form a series circuit with the gas valve is disclosed. The control apparatus comprises switch means which is connected to

Control apparatus for controlling the operation of a gas valve in a gas heating system which includes thermostatic switch means and a source of AC voltage which are connected to form a series circuit with the gas valve is disclosed. The control apparatus comprises switch means which is connected to provide continuity in the series circuit upon receipt of a first control signal and to remove the continuity in the series circuit upon removal of the first control signal. Isolation means receives a second control signal having a high state and an alternate low state and generates the first control signal when receiving the high state of the second control signal. A power supply receives the AC voltage when the thermostatic switch means is closed and provides a DC voltage to a timer means. The timer means then generates the second control signal.

대표청구항 ▼

Apparatus for controlling the operation of a gas valve in a gas heating system which includes thermostatic switch means and a source of AC voltage which are operatively connected to form a series circuit with said gas valve such that said gas valve is activated by said AC voltage to allow gas to flo

Apparatus for controlling the operation of a gas valve in a gas heating system which includes thermostatic switch means and a source of AC voltage which are operatively connected to form a series circuit with said gas valve such that said gas valve is activated by said AC voltage to allow gas to flow to a gas burner in said gas heating system when said thermostatic switch means is activated to the closed position, said apparatus comprising: switch means operatively connected to provide continuity in said series circuit upon receipt of a first control signal and to remove said continuity in said series circuit upon removal of said first control signal; isolation means operatively connected to receive a second control signal having a high state and an alternate low state, said isolation means being structured to generate said first control signal when receiving the high state of said second control signal and being operatively connected to apply said first control signal to said switch means; a power supply operatively connected to receive said AC voltage and to provide a DC output voltage of predetermined value; timer means structured to generate said second control signal upon receiving, as an input, said DC output voltage from said power supply; and relay means including an activating coil which is operatively connected to be activated by said DC output of said power supply and further including contact means operatively connected to place the output of said switch means in said series circuit with said gas valve when said thermostatic switch means is closed and said activating coil is activated and to remove the output of said switch means in said series circuit with said gas valve when said thermostatic switch means is open and said activating coil is not activated, said contact means providing continuity in said series circuit with said gas valve when said output of said switch means is removed from said series circuit with said gas valve.