US PATENT SUBCLASS 335 / 177
.~ Plural magnets or flux sources

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.~ Plural magnets or flux sources {5}
178  DF  .~.~> Of diverse electrical characteristics
179  DF  .~.~> Of diverse magnetic characteristics (e.g., permanent plus electromagnet)
180  DF  .~.~> With common core or single armature {2}
183  DF  .~.~> Magnetic fields or torques acting alternately in opposite directions
184  DF  .~.~> With plural reciprocating armatures aligned or rigidly connected

DEFINITION

Classification: 335/177

(under subclass 2) Subject matter wherein the structure includes at least two or more magnetic flux sources adapted to cooperate in the operation of the same main circuit control contacts. Generally one magnet operates to close the circuit and the other operates to open the circuit or several magnets may operate simultaneously on an armature system. One or more of the magnets may be a permanent magnet.

SEE OR SEARCH THIS CLASS, SUBCLASS:

8+, for multipole or polyphase circuit interrupting devices with plural flux sources.

11, for plural automatic circuit interrupters each with magnet.

92, for periodic type switches with plural magnets.

102, and 103, for alternating current actuated switches with plural magnets.

136, for multiple contact type with plural magnet or coil means. 159+, for plural independently operated switches.

206, for plural switches of the permanent magnet operated type.

207, for switches utilizing plural permanent magnets.

223+, for magnetomotive device of the relatively movable conductor type (e.g., dynamometer type).

246, for alternating current electromagnets with plural

windings.

266+, for other electromagnets with plural coils.

SEE OR SEARCH CLASS

178, Telegraphy,

74+, for telegraph circuits with electromagnetic switching means utilizing plural magnets.

246, Railway Switches and Signals,

218+, (especially subclasses 227 and 231+) for electrically actuated railway signal devices utilizing plural magnets. 361, Electricity: Electrical Systems and Devices,

160+, for electric circuits for relays and electromagnets with plural coils.