(under subclass 456) Apparatus in which the valve is closed in response to a change in temperature in the line.
SEE OR SEARCH THIS CLASS, SUBCLASS:
59+, for freeze condition responsive valves.
65+, for fuel safety cut-offs responsive to combustion failure in a burner.
72+, for flow control devices which includes a heat fusible or destructible element for sensing the thermal condition.
79+, for valves controlled in response to variations in atmospheric temperature.
468, for valves operated in response to changes in thermal condition in the line but not requiring reset, and see the search notes thereto. SEE OR SEARCH CLASS
236, Automatic Temperature and Humidity Regulation,
appropriate subclasses, especially
21, for safety cut-outs and subclass 89 for motor safety cut-outs in automatic temperature regulation.
