US PATENT SUBCLASS 340 / 597
.~.~.~.~ Curie point sensor

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  DF  .~.~ Thermal {8}
595  DF  .~.~.~ Current modifier or generator {4}
597.~.~.~.~ Curie point sensor

DEFINITION

Classification: 340/597

Curie point sensor:

(under subclass 595) Subject matter wherein the sensor has a spontaneous ferroelectric or ferromagnetic polarization at some temperature, and detects thermal conditions by the change or disappearance of such polarization due to said conditions.

SEE OR SEARCH CLASS

374, Thermal Measuring and Testing,

176+, for a thermometer with a sensor having spontaneous polarization (e.g., ferroelectric, ferromagnetic).