US PATENT SUBCLASS 335 / 261
.~.~.~ Armature structure or material

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.~.~.~ Armature structure or material {3}
262  DF  .~.~.~.~> With centering or aligning or guiding means
263  DF  .~.~.~.~> With plunger rotation preventing means (e.g., means to prevent undesired rotation of the plunger during movement)
264  DF  .~.~.~.~> Sectional plunger

DEFINITION

Classification: 335/261

(under subclass 255) Subject matter including details of the structure of the plunger type armature, details of the material of which the armature is made, or details of both the structure and the material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

203, for switches with significant armature structure.

251, for alternating current electromagnet with plunger type armature construction or mounting means.

279+, for electromagnets with significant armature structure, of types other than plunger type armatures.