US PATENT SUBCLASS 218 / 28
.~.~.~ Plural coils

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}
22  DF  .~ Magnetic blowout {7}
23  DF  .~.~ Permanent magnet {5}
28.~.~.~ Plural coils

DEFINITION

Classification: 218/28

Plural coils:

(under subclass 23) Subject matter wherein the magnetic blowout circuit breaker consists of more than one conductor wound up in a spiral form.

SEE OR SEARCH THIS CLASS, SUBCLASS:

104, for arcing chamber in liquid switch.

141+, for magnetic coil used in vacuum switch.