US PATENT SUBCLASS 74 / 137
.~.~.~.~ Spring or weight return

Current as of: June, 1999
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74 /   HD   MACHINE ELEMENT OR MECHANISM

111  DF  MECHANICAL MOVEMENTS (INTERMITTENT GRIP TYPE) {3}
126  DF  .~ Oscillation or reciprocation to intermittent unidirectional motion {5}
*  DD  .~.~ Strap actuator {2}
136  DF  .~.~.~ Multiple acting {1}
137.~.~.~.~ Spring or weight return

DEFINITION

Classification: 74/137

(under subclass 136) Mechanisms, in which a spring or weight moves the strap in one direction.