(under subclass 59) Subject matter wherein the delay structure comprises means whereby the desired time interval transpiring between the application of a control signal and the contact actuation is determined by the heating of a thermal element, such as a bimetallic element for example, by an electric current.
(1) Note. The subject matter to be found here is directed to the delay means for electromagnetically actuated switches. Where the switch actuator is thermal, classification of the thermal current actuated switches is in Class 200, subclasses 113+ and of the thermal actuated switches, is in Class 337, appropriate subclasses.
SEE OR SEARCH THIS CLASS, SUBCLASS:
31, for automatic circuit interrupters with latch or trip reclosing or resetting means utilizing thermal delay means.
35+, above, for combined trip structure, for circuit interrupting devices, with one means being thermal.
39+, for magnetic trip structure with thermal delay means.
43+, for thermal trip structure. 141+, for electromagnetic switch control means combined with thermal means.
SEE OR SEARCH CLASS
307, Electrical Transmission or Interconnection Systems,
117, for condition responsive switching systems responsive to light, heat, vibratory or radiant energy.
322, Electricity: Single Generator Systems,
33, for automatic control means for a generator or driving means which is responsive to thermal conditions.
337, Electricity: Electrothermally or Thermally Actuated Switches, appropriate subclasses. See (1) Note above.
361, Electricity: Electrical Systems and Devices,
23+, for thermal protective devices, subclass 99 for safety and protection devices with combined thermal and electromagnetic relay delay means, and subclasses 160+ for thermal control means in electric circuits for relays and electromagnets.
374, Thermal Measuring and Testing,
187+, for expanding solid type and subclasses 201+ for expanding fluid thermometric devices in general.
