US PATENT SUBCLASS 74 / 3
.~ Speed controlled

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

2  DF  AUTOMATIC OPERATION OR CONTROL (E.G., TRIPS) {3}
3.~ Speed controlled {1}
3.2  DF  .~.~> Valve gear trips (e.g., steam engine "Corliss" type)

DEFINITION

Classification: 74/3

(under subclass 2) Mechanisms wherein the releasing or tripping is initiated by a speed responsive device.

SEE OR SEARCH CLASS

73, Measuring and Testing,

535+, for a speed sensor of the centrifugal weight type.

192, Clutches and Power-Stop Control,

140, for speed responsive limit stops and subclass 147 for speed response clutch releases combined with brakes.