US PATENT SUBCLASS 335 / 179
.~.~ Of diverse magnetic characteristics (e.g., permanent plus electromagnet)

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

2  DF  ELECTROMAGNETICALLY ACTUATED SWITCHES {30}
177  DF  .~ Plural magnets or flux sources {5}
179.~.~ Of diverse magnetic characteristics (e.g., permanent plus electromagnet)

DEFINITION

Classification: 335/179

(under subclass 177) Subject matter wherein the magnets are specifically described as having diverse magnetic characteristics. For example, one or more may be a permanent magnet while another may be an electromagnet.

SEE OR SEARCH THIS CLASS, SUBCLASS:

78+, for polarized switches utilizing a plurality of magnetic means consisting of electromagnet plus permanent magnet.

153, for vacuum or hermetically sealed type switches with

electromagnet and permanent magnet structure.

222, for magnetomotive device with relatively movable coil and permanent magnet.

229+, below, for electromagnets with armature including permanent magnet devices. SEE OR SEARCH CLASS

361, Electricity: Electrical Systems and Devices,

208, for electric circuits for electromagnets and relays employing polarized relay means utilizing electromagnets plus at least one permanent magnet.