US PATENT SUBCLASS 73 / 652
.~.~ With inertia element

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

570  DF  VIBRATION {10}
649  DF  .~ Sensing apparatus {5}
652.~.~ With inertia element {2}
653  DF  .~.~.~> With light beam indicator
654  DF  .~.~.~> With electrically controlled indicator

DEFINITION

Classification: 73/652

With inertia element:

(under subclass 649) Subject matter in which the sensing apparatus includes a heavy mass which will remain relatively stationary.

SEE OR SEARCH THIS CLASS, SUBCLASS:

514.01+, for an acceleration responsive device.

651, for a mass located on a vibratable reed.

SEE OR SEARCH CLASS

346, Recorders,

7, for recording accelerometers.