US PATENT SUBCLASS 218 / 43
.~ Air-current blowout

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}
43.~ Air-current blowout {18}
44  DF  .~.~> Polyphase
45  DF  .~.~> Disconnect switch
46  DF  .~.~> Arcing chamber {1}
48  DF  .~.~> Contact structure {2}
51  DF  .~.~> With gas flow means {1}
53  DF  .~.~> With nozzle {1}
55  DF  .~.~> Grounding switch
56  DF  .~.~> Self extinguishing
57  DF  .~.~> Puffer piston {6}
68  DF  .~.~> Sealed chamber {10}
81  DF  .~.~> Arc chute
82  DF  .~.~> Identical units back-to-back
83  DF  .~.~> Recirculating systems
84  DF  .~.~> Operating mechanism structure or arrangement
85  DF  .~.~> Arc extinguishing medium
86  DF  .~.~> Low pressure cut-off valve means
87  DF  .~.~> Magnetic synchronous contacts
88  DF  .~.~> Control of blast valve and contacts

DEFINITION

Classification: 218/43

Air-current blowout:

(under subclass 1) Subject matter including means for directing a blast of gas, such as air, across the arc to extinguish it.