US PATENT SUBCLASS 335 / 254
.~.~.~ With latch-control winding

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}
253  DF  .~.~ With armature latch means (e.g., means to retain armature in open or closed position {1}
254.~.~.~ With latch-control winding

DEFINITION

Classification: 335/254

(under subclass 253) Subject matter wherein the armature latch means is positioned in the latch or unlatch position by the attractive or repulsive force of an energized coil winding.

(1) Note. The latch control winding is usually an auxiliary winding which does not control the operation of the armature.

SEE OR SEARCH THIS CLASS, SUBCLASS:

170, for switches with magnetically operated latch means.

274, for magnetic armature holding or locking means such as a magnetic biasing means.

SEE OR SEARCH CLASS

361, Electricity: Electrical Systems and Devices, 194, for control circuits for electromagnetic devices including a holding means.