US PATENT SUBCLASS 250 / 231.15
.~.~.~.~.~.~ With plural gear driven discs

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}
231.15.~.~.~.~.~.~ With plural gear driven discs

DEFINITION

Classification: 250/231.15

With plural gear driven discs:

(under subclass 231.14) Subject matter in which the incremental data is generated using more than one circularly shaped element coupled to the rotating shaft by gear drive means.

SEE OR SEARCH CLASS

341, Coded Data Generation or Conversion,

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