(under the class definition) Apparatus having an element specially provided to be destroyed or consumed by breaking or fusing upon the occurrence of a selected condition or event to protect the apparatus or its surroundings by relieving an unsafe stress or shutting down the heat emitter.
SEE OR SEARCH CLASS
49, Movable or Removable Closures,
3, and 4 for movable closure released or actuated by a fusible connection.
122, Liquid Heaters and Vaporizers,
504.1, and 504.3 for a fusible type safety device in a boiler. 126, Stoves and Furnaces,
287.5, for a stove having fusible released damper.
137, Fluid Handling,
72+, for a heat destructible or fusible control element in a fluid handling system of general utility.
169, Fire Extinguishers,
42, for a fusible device adapted for use in fire extinguishing apparatus.
431, Combustion,
21, for the control of a burner, per se, by a combustion destructible element.
