US PATENT SUBCLASS 177 / 232
.~.~ Coil spring in sleeve casing

Current as of: June, 1999
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177 /   HD   WEIGHING SCALES

201  DF  SELF-POSITIONING {9}
225  DF  .~ Spring {6}
232.~.~ Coil spring in sleeve casing {1}
233  DF  .~.~.~> With vertical pointer slit

DEFINITION

Classification: 177/232

(under subclass 225) Apparatus comprising a helical coil spring within a casing having a constant cross sectional area in its spring enclosing section corresponding to that of the spring.