US PATENT SUBCLASS 335 / 253
.~.~ With armature latch means (e.g., means to retain armature in open or closed position

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

DEFINITION

Classification: 335/253

(under subclass 220) Subject matter including armature latch means responsive to movement of an armature to latch or hold said armature or another armature in a particular position.

(1) Note. This subclass provides for electromagnets with plural armatures wherein the movement of one armature actuates a latch means to prevent the operation of another armature.

(2) Note. The armatures of this subclass may be locked in the open or closed position.

SEE OR SEARCH THIS CLASS, SUBCLASS:

21+, for automatic circuit interrupters with latch or trip means.

77, for motor actuated switches with latch.

113, for multiple contact automatic telephone type switch with latch. 160+, for interlocking switches.

167+, for switches with latching means.

233, for polarized electromagnet with latching means.

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

SEE OR SEARCH CLASS

74, Machine Element or Mechanism,

483, for mechanical locking or interlocking means for machine elements and subclasses 527+ for detent type locking means.

200, Electricity: Circuit Makers and Breakers,

50, for interlocking switches.

361, Electricity: Electrical Systems and Devices,

194, for control circuits for electromagnetic devices including a holding means.