US PATENT SUBCLASS 340 / 584
.~.~ Thermal

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

500  DF  CONDITION RESPONSIVE INDICATING SYSTEM {6}
540  DF  .~ Specific condition {18}
584.~.~ Thermal {8}
585  DF  .~.~.~> Refrigerated storage
586  DF  .~.~.~> Portable
587  DF  .~.~.~> False alarm resistant
588  DF  .~.~.~> Time-temperature relationship (e.g., overtemperature exceeds predetermined interval or time-temperature integral) {1}
590  DF  .~.~.~> Fusible, frangible, or destructible sensor {1}
592  DF  .~.~.~> Expanding fluid sensor
593  DF  .~.~.~> Switch sensor {1}
595  DF  .~.~.~> Current modifier or generator {4}

DEFINITION

Classification: 340/584

Thermal:

(under subclass 540) Subject matter wherein the condition is a predetermined level of heat or temperature.

SEE OR SEARCH THIS CLASS, SUBCLASS:

581, for the thermal detection of ice formation.

606, for flow rate detection by a heat responsive sensor.

622, for heat responsive detection of liquid level.

SEE OR SEARCH CLASS

116, Signals and Indicators, 101, and 216+ for mechanical thermal alarms and indicators.

219, Electric Heating,

248, for a heating device combined with a sole plate-type pressure application means (e.g., a flatiron, etc.) including a condition-responsive indicator, subclass 445.1 for an exposed planar support surface for material to be heated (e.g., hot plate, etc.) including an indicator, subclasses 446.1+ for an exposed planar support surface for material to be heated (e.g., hot plate, etc.) including a sensing means, or subclass 667 for a condition-responsive temperature load sensing power switching supply system for an inductive heating device.

329, Demodulators, appropriate subclasses for thermal change type demodulators.

331, Oscillators,

66, for electric oscillation generators combined with condition sensing means responsive to temperature changes, and wherein some characteristic (e.g., wave amplitude or frequency) of the generator is varied by the condition sensing means.

356, Optics: Measuring and Testing,

43+, for optical pyrometers.

361, Electricity: Electrical Systems and Devices,

161+, for thermally responsive relay control circuit.

374, Thermal Measuring and Testing,

4, 28 and 43 through 57 for thermal testing, subclasses 29+ for heat flux measurement, subclasses 31+ for a calorimeter; and subclasses 100+ for a thermometer with quantitative indication, particularly subclasses 121+ for a radiation thermometer.

431, Combustion,

13+, for a burner having a signal or indicator; and subclasses 75+ for a burner controlled by a combustion zone sensor.