Safety shut off for water heaters

Details Safety shut off for water heaters Safety shut off for water heaters

2008-01-15

2008-01-15

Leja, Ronald W. (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Circuit interruption by thermal sensing

C431S022000

Reexamination Certificate

active

07319577

ABSTRACT:
A water heater includes a gas valve and a solenoid to operate the gas valve. A thermocouple of the water heater is heated by a pilot light to provide a current source to maintain the gas valve in an open position. A sensor activated switch switches current from a second current source to the solenoid to move the gas valve to a closed position.

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