US PATENT SUBCLASS 335 / 263
.~.~.~.~ With plunger rotation preventing means (e.g., means to prevent undesired rotation of the plunger during movement)

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}
255  DF  .~.~ With plunger-type armature {6}
261  DF  .~.~.~ Armature structure or material {3}
263.~.~.~.~ With plunger rotation preventing means (e.g., means to prevent undesired rotation of the plunger during movement)

DEFINITION

Classification: 335/263

(under subclass 261) Subject matter including means in combination with the plunger type armature to prevent rotation of the armature relative to the solenoid coil or casing.

SEE OR SEARCH THIS CLASS, SUBCLASS:

262, for electromagnets with plunger type armature having centering, aligning or guide means which may also serve to prevent rotation of the armature relative to the solenoid coil or casing.