(under subclass 67) Alarms actuated by changes of temperature, usually for fire-alarms, for incubators, steam-boilers, etc.
SEE OR SEARCH CLASS
200, Electricity: Circuit Makers and Breakers,
136+, for thermal circuit-closers.
236, Automatic Temperature and Humidity Regulation, appropriate subclasses, for automatic temperature-regulating devices controlled by temperature changes.
277, Seal for a Joint or Juncture, for a generic sealing means or process,
319, for a seal combined with a fluid temperature indicator, sampler, or inspection feature. 340, Communications: Electrical,
577+, 584+, and 600+ for electric alarms which are automatically responsive to temperature or flame or radiant energy.
352, Optics: Motion Pictures,
143+, for fire prevention and isolation apparatus frequently including alarms for use with motion picture films.
