US PATENT SUBCLASS 73 / 1.22
.~.~.~ With magnetic or optical sensor

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

1.01  DF  INSTRUMENT PROVING OR CALIBRATING {13}
1.16  DF  .~ Volume of flow, speed of flow, volume rate of flow, or mass rate of flow {12}
1.19  DF  .~.~ Piston {3}
1.22.~.~.~ With magnetic or optical sensor

DEFINITION

Classification: 73/1.22

With magnetic or optical sensor:

(under subclass 1.19) Subject matter including either (a) a body having properties of attracting materials, as iron, by virtue of a surrounding field of force created by motion of its atomic electrons and the alignment of its atoms which change in response to the movement of the piston or (b) a body whose response to light changes in response to the movement of the piston.

SEE OR SEARCH CLASS

250, Radiant Energy, for a photocell circuit generating positional information.

324, Electricity: Measuring and Testing,

200+, for measuring using a magnetic sensor, per se, especially subclasses 207.11+ for determination of a displacement using a magnetic sensor, per se.

356, Optics: Measuring and Testing,

372+, for optical measuring and testing by mensuration.