US PATENT SUBCLASS 73 / 320
.~.~.~ With spiral cam or guide


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

290 R  DF  LIQUID LEVEL OR DEPTH GAUGE {13}
305  DF  .~ Float {12}
319  DF  .~.~ Vertically reciprocable {3}
320.~.~.~ With spiral cam or guide


DEFINITION

Classification: 73/320

(under subclass 319) Gauges wherein the motion of the indicator is derived from a reciprocally guided float coacting with a spiral or similar cam surface.