US PATENT SUBCLASS 74 / 3.2
.~.~ Valve gear trips (e.g., steam engine "Corliss" type)

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  DF  .~ Speed controlled {1}
3.2.~.~ Valve gear trips (e.g., steam engine "Corliss" type)

DEFINITION

Classification: 74/3.2

(under subclass 3) Mechanisms wherein a flow controlling valve is the released or tripped device.

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2, for other automatically-operated valve gear trips not speed responsive nor otherwise classifiable in subclasses below.