US PATENT SUBCLASS 218 / 122
.~.~.~ Pressure monitoring means

Current as of: June, 1999
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218 /   HD   HIGH-VOLTAGE SWITCHES WITH ARC PREVENTING OR EXTINGUISHING DEVICES

1  DF  ARC PREVENTING OR EXTINGUISHING DEVICES {14}
118  DF  .~ Vacuum {5}
121  DF  .~.~ Single-pole {3}
122.~.~.~ Pressure monitoring means

DEFINITION

Classification: 218/122

Pressure monitoring means:

(under subclass 121) Subject matter including means having a vacuum pressure detector element for supervising the exertion of force in the vacuum switch or detecting the loss of vacuum within the vacuum switch housing.

SEE OR SEARCH CLASS

324, Electricity: Measuring and Testing,

415, 424, and other appropriate subclasses for testing of electromechanical circuit breakers.