US PATENT SUBCLASS 33 / 316
.~ Gyromagnetic compass

Current as of: June, 1999
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33 /   HD   GEOMETRICAL INSTRUMENTS

300  DF  INDICATOR OF DIRECTION OF FORCE TRAVERSING NATURAL MEDIA {23}
316.~ Gyromagnetic compass {1}
317 R  DF  .~.~> Electrical telemetering {1}

DEFINITION

Classification: 33/316

(under subclass 300) Device wherein a magnetic field sensitive device (compass, flux valve) is utilized to monitor a directional gyroscope by orienting the gyroscope in the direction of the magnetic meridian.

SEE OR SEARCH THIS CLASS, SUBCLASS:

318+, for a gyroscopically controlled or stabilized directional indicator, especially subclass 319 for a magnetic compass which is controlled or stabilized by a gyroscope.