US PATENT SUBCLASS 337 / 302
.~.~ Periodic or cyclically operative

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

298  DF  THERMALLY ACTUATED SWITCHES {7}
301  DF  .~ With mechanical timing means (e.g., clockwork) {2}
302.~.~ Periodic or cyclically operative {1}
303  DF  .~.~.~> With predetermined operative cycle adjusting means

DEFINITION

Classification: 337/302

(under subclass 301) Subject matter comprising means whereby a circuit is completed and broken intermittently or cyclically at constantly recurring intervals.

(1) Note. For other cyclic or periodic actuators used in devices of this class, see the subclasses listed under SEARCH THIS CLASS, SUBCLASS in subclass 92.

SEE OR SEARCH THIS CLASS, SUBCLASS:

51, for similar subject matter utilizing electrothermally responsive bimetallic means.

116, for similar subject matter in expansible or vaporizable fluid actuated switches.

138, for cyclically operated longitudinally expansible element actuated switches.

SEE OR SEARCH CLASS

200, Electricity: Circuit Makers and Breakers,

19.01+, for periodic circuit breakers generally.

307, Electrical Transmissions or Interconnection Systems,

132, for repetitive make and break switching systems.

315, Electric Lamp and Discharge Devices: Systems,

209+, for systems having a periodic switch in the supply circuit of a load or loads.

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,

87+, for periodically operated electromagnetic switches (e.g. vibrators).

363, Electric Power Conversion Systems,

110, for an inverter system comprising a vibrator.