US PATENT SUBCLASS 335 / 243
.~.~ Alternating current type

Current as of: June, 1999
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335 /   HD   ELECTRICITY: MAGNETICALLY OPERATED SWITCHES, MAGNETS, AND ELECTROMAGNETS

209  DF  MAGNETS AND ELECTROMAGNETS {10}
220  DF  .~ With magneto-mechanical motive device (e.g., electromagnet with armature) {21}
243.~.~ Alternating current type {5}
244  DF  .~.~.~> Flux phase displacement or varying means {2}
247  DF  .~.~.~> With chatter- or noise-preventing means {2}
250  DF  .~.~.~> Coil construction or mounting means
251  DF  .~.~.~> With plunger-type armature
252  DF  .~.~.~> With vibrating armature

DEFINITION

Classification: 335/243

(under subclass 220) Subject matter wherein the electromagnet and armature is particularly adapted for operation by alternating current.

SEE OR SEARCH THIS CLASS, SUBCLASS:

99+, for alternating or fluctuating current type switches.

204, for through conductor type switch.

223+, for relatively movable conductor (dynamometer) type devices.

231, for polarized electromagnet responsive to varying alternating current amplitude.

236, for alternating current type electromagnet with shunt flux path. 239+, for alternating current type electromagnet with time

delay.

SEE OR SEARCH CLASS

361, Electricity: Electrical Systems and Devices,

143+, for electric circuit for alternating current relays and electromagnets.