US PATENT SUBCLASS 335 / 251
.~.~.~ With plunger-type armature

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  DF  .~.~ Alternating current type {5}
251.~.~.~ With plunger-type armature

DEFINITION

Classification: 335/251

(under subclass 243) Subject matter wherein the armature is in the form of a solenoid core or plunger.

SEE OR SEARCH THIS CLASS, SUBCLASS:

52+, for conductive liquid fluid type switches with piston or plunger.

131, for multiple contact switch with reciprocating armature.

255+, for nonalternating current type electromagnets with plunger type armature.

SEE OR SEARCH CLASS

361, Electricity: Electrical Systems and Devices, 160+, for electric circuits for plunger type alternating current electromagnets.