(under subclass 306) Subject matter comprising significant means whereby (1) the contact control means of the temperature responsive means may be prevented from movement when the operative temperature is either below or above certain limits, (2) the contact control means may be locked in either the circuit closed or circuit open position, irrespective of a change in a temperature condition, or (3) the contacts are prevented from accidental movement from a predetermined condition.
(1) Note. For other latching or holding means used in devices of this class, see the subclasses listed under SEARCH THIS CLASS, SUBCLASS in subclass 46.
SEE OR SEARCH CLASS
335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,
157+, for similar subject matter in electromagnetically operated switches.
