US PATENT SUBCLASS 337 / 298
THERMALLY ACTUATED SWITCHES

Current as of: June, 1999
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337 /   HD   ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES

298THERMALLY ACTUATED SWITCHES {7}
299  DF  .~> Plural diverse actuating means in single switch
300  DF  .~> Responsive to plural external conditions (e.g., temperature and humidity)
301  DF  .~> With mechanical timing means (e.g., clockwork) {2}
306  DF  .~> Expansible or vaporizable fluid actuated {12}
333  DF  .~> With bimetallic element {9}
382  DF  .~> With longitudinally expansible solid element {7}
401  DF  .~> With fusible, combustible or explosive material {5}

DEFINITION

Classification: 337/298

(under the class definition) Subject matter comprising circuit controlling means which is wholly, or for the major part, responsive to heat from the surrounding atmosphere or material (i.e., thermally actuated).

(1) Note. See the definition of subclass 14 of this class for the distinction between electrothermally actuated switches and this group of thermally actuated switches.

SEE OR SEARCH THIS CLASS, SUBCLASS:

14+, for switching devices responsive to heat derived, to a major degree, from an electrical current traversing the device. See (1) Note above.

SEE OR SEARCH CLASS

99, Foods and Beverages: Apparatus,

325+, for automatic control means for cooking apparatus, the means being thermally responsive. 219, Electric Heating,

494+, for thermally responsive means for automatically controlling the power supply or controlling the current in electric heater devices and subclasses 510+ for thermally responsive automatically operated switching means for electric heaters.

236, Automatic Temperature and Humidity Regulation,

91, 104 for thermostatic control means for automatic temperature and humidity regulation devices.

307, Electrical Transmission or Interconnection Systems,

117, for electrical switching systems responsive to light, heat, etc.

320, Electricity: Battery or Capacitor Charging or Discharging,

166+, for charging or discharging a capacitor, per se.

361, Electricity: Electrical Systems and Devices,

103+, for protective circuits with thermally responsive actuating means, and subclasses 161+ for control circuits for electromagnetic devices with thermal control means.

374, Thermal Measuring and Testing, 100+, for thermometers, per se.

439, Electrical Connectors,

161, for an electrical connector having an element responsive to temperature to effect varying pressure on the contact surfaces.