US PATENT SUBCLASS 318 / 294
.~.~.~.~ Wheatstone bridge type

Current as of: June, 1999
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318 /   HD   ELECTRICITY: MOTIVE POWER SYSTEMS

280  DF  MOTOR-REVERSING {4}
287  DF  .~ Armature or primary circuit control {2}
291  DF  .~.~ Armature or primary current reversal {2}
293  DF  .~.~.~ Reversing polarity of current supplied to armature circuit {2}
294.~.~.~.~ Wheatstone bridge type

DEFINITION

Classification: 318/294

(under subclass 293) Subject matter in which a plurality of electrical devices are provided and connected in a Whetstone bridge arrangement, the output circuit of which arrangement is connected to the armature circuit of the motor.

(1) Note. For definition of Wheatstone-bridge arrangement" see (1) Note to the definition of subclass 29.

SEE OR SEARCH THIS CLASS, SUBCLASS:

29, for follow-up motor systems having a Wheatstone bridge arrangement for causing the motor to run in one direction or the other by controlling the polarity of the motor current.

509+, and the subclasses specified in the Notes thereto for miscellaneous motor systems having a Wheatstone bridge in the armature circuit.

SEE OR SEARCH CLASS

323, Electricity: Power Supply or Regulation Systems, 365, for miscellaneous Wheatstone bridge arrangements.

333, Wave Transmission Lines and Networks,

169, for wave filters of the Wheatstone bridge or lattice

type.