US PATENT SUBCLASS 250 / 231.18
.~.~.~.~.~.~ Position indicating shaft encoders with means to generate a unique signal for each specific angular shaft position

Current as of: June, 1999
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250 /   HD   RADIANT ENERGY

200  DF  PHOTOCELLS; CIRCUITS AND APPARATUS {11}
216  DF  .~ Optical or pre-photocell system {11}
229  DF  .~.~ Light valve (e.g., iris diaphragm) {3}
231.1  DF  .~.~.~ Actuated by dynamic external physical quantity {4}
231.13  DF  .~.~.~.~ Shaft angle transducers {1}
231.14  DF  .~.~.~.~.~ Incremental shaft readers; i.e., with means to generate increments of angular shaft rotation {4}
231.18.~.~.~.~.~.~ Position indicating shaft encoders with means to generate a unique signal for each specific angular shaft position

DEFINITION

Classification: 250/231.18

Position indicating shaft encoders with means to generate a unique signal for each specific angular shaft position:

(under subclass 231.14) Subject matter including means to establish a unique number of shaft angle positions and to generate a unique, distinct signal for each of those positions.

SEE OR SEARCH CLASS

341, Coded Data Generation or Conversion,

13, for similar subject matter combined with digital signal processing circuitry.