US PATENT SUBCLASS 337 / 151
.~.~.~.~ Ratchet and pawl

Current as of: June, 1999
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337 /   HD   ELECTRICITY: ELECTROTHERMALLY OR THERMALLY ACTUATED SWITCHES

14  DF  ELECTROTHERMALLY ACTUATED SWITCHES {9}
142  DF  .~ Fusible element actuated {15}
143  DF  .~.~ With manual or other mechanical contact control means {8}
150  DF  .~.~.~ Latching trip or holding means (actuated by condition by fuse element) {4}
151.~.~.~.~ Ratchet and pawl

DEFINITION

Classification: 337/151

(under subclass 150) Subject matter wherein the latching or holding structure comprises significant details relating to ratcher and pawl means whereby the contacts are released upon the release of the ratchet wheel for rotation about its axis.

SEE OR SEARCH CLASS

74, Machine Element or Mechanism,

595+, for pawl and ratchet mechanisms, per se.

200, Electricity: Circuit Makers and Breakers,

81+, for fluid operated switches with ratchet and pawl type thermally released latching means.