US PATENT SUBCLASS 335 / 255
.~.~ 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}
255.~.~ With plunger-type armature {6}
256  DF  .~.~.~> Plural coils controlling a single armature
257  DF  .~.~.~> With shock-absorbing means (e.g., means to absorb the shock of armature or plunger)
258  DF  .~.~.~> With armature stroke adjustment
259  DF  .~.~.~> Plural plungers
260  DF  .~.~.~> With sealed enclosure (e.g., dust or moistureproof)
261  DF  .~.~.~> Armature structure or material {3}

DEFINITION

Classification: 335/255

(under subclass 220) Subject matter wherein the armature is in the form of a core or plunger mounted for movement within the coil or solenoid of the electromagnet.

SEE OR SEARCH THIS CLASS, SUBCLASS:

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

217, for temperature responsive electromagnets with plunger type armature.

239, for time delay electromagnet with plunger type armature.

251, for alternating current electromagnet with plunger type armature. SEE OR SEARCH CLASS

124, Mechanical Guns and Projectors,

3, for electromagnetic solenoid means for linearly moving a magnetic projectile through the barrel of a projecting device.

310, Electrical Generator or Motor Structure,

14, for linear motor of the solenoid and core type, subclasses 23+, 30 and 34+ for dynamoelectric device with reciprocating plungers.

336, Inductor Devices,

130+, for inductor with relatively movable core and coil, particularly subclass 136 for inductor with telescoping core and coil.

361, Electricity: Electrical Systems and Devices,

139+, for control circuit for plunger type relays or electromagnets.