US PATENT SUBCLASS 318 / 663
.~.~.~ Potentiometer systems including autotransformers and Wheatstone bridges

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


318 /   HD   ELECTRICITY: MOTIVE POWER SYSTEMS

560  DF  POSITIONAL SERVO SYSTEMS (E.G., SERVOMECHANISMS) {23}
638  DF  .~ With particular "error-detecting" means {13}
652  DF  .~.~ With particular position measuring instruments {7}
663.~.~.~ Potentiometer systems including autotransformers and Wheatstone bridges {4}
664  DF  .~.~.~.~> Minor arc seeking
665  DF  .~.~.~.~> Continuous rotation, unlimited range
666  DF  .~.~.~.~> Controlled tap and slidewire
667  DF  .~.~.~.~> With a bridge in the feedback circuit {1}

DEFINITION

Classification: 318/663

(under subclass 652) Subject matter in which the particular position measuring instrument is a potentiometer. A potentiometer is any voltage dividing circuit. Included herein are systems using autotransformers as A C potentiometers. Also included herein are systems in which the command signal is introduced by one half of a Wheatstone bridge and the feedback potentiometer forms the other half of the bridge.

SEE OR SEARCH CLASS

338, Electrical Resistors,

68+, for mechanically variable resistors.