(under subclass 78) Device wherein the control means is responsive to a variation in sensible heat.
SEE OR SEARCH CLASS
236, Automatic Temperature and Humidity Regulation, appropriate subclass, for control systems employing thermostats and other heat-responsive switches.
337, Electricity: Electrothermally or Thermally Actuated Switches, appropriate subclass, for temperature-responsive switches.
374, Thermal Measuring and Testing,
125, for a radiation thermometer with fluid flow purging, and subclasses 139+ for a molten metal thermometer.
