US PATENT SUBCLASS 33 / 397
.~.~.~ Gimbal mounted

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

300  DF  INDICATOR OF DIRECTION OF FORCE TRAVERSING NATURAL MEDIA {23}
365  DF  .~ Level or plumb, terrestrial gravitation responsive {9}
391  DF  .~.~ Pendulum {8}
397.~.~.~ Gimbal mounted

DEFINITION

Classification: 33/397

(under subclass 391) Device wherein the pendulum is so suspended as to incline freely in any direction (e.g., universal joint, ball and socket, etc.).

SEE OR SEARCH THIS CLASS, SUBCLASS:

308+, for gimbal supported borehole direction indicators with a recorder.