(under subclass 52) Circuit controllers comprising means whose action is initiated by the presence of non-liquid fluids including colloidal suspensions of solid particles in a gas.
(1) Note. These circuit controllers may involve mechanisms which become unbalanced as a result of exothermic reaction, breakdown of surface tension, or buoyancy due to the presence of the gas.
SEE OR SEARCH THIS CLASS, SUBCLASS:
61.04, for liquid or moisture responsive devices.
SEE OR SEARCH CLASS
340, Communications: Electrical,
628, 634 for electric automatic gas or smoke responsive indicating systems.
