US PATENT SUBCLASS 218 / 143
.~ Resistance inserting


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}
143.~ Resistance inserting {1}
144  DF  .~.~> With capacitor


DEFINITION

Classification: 218/143

Resistance inserting:

(under subclass 1) Subject matter including a series circuit including an impedance means and an impedance contact assembly coupled in parallel with the main contact assembly.

(1) Note. The impedance may be inserted into the circuit during the closing or opening operations.

(2) Note. The resistance or impedance inserting means may be used in combination with any type of circuit interrupter assembly.