US PATENT SUBCLASS 218 / 68
.~.~ Sealed chamber

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  DF  .~ Air-current blowout {18}
68.~.~ Sealed chamber {10}
69  DF  .~.~.~> Plural switch connected in series {1}
71  DF  .~.~.~> Polyphase
72  DF  .~.~.~> With nozzle {1}
74  DF  .~.~.~> Contact structure
75  DF  .~.~.~> Busbar
76  DF  .~.~.~> Arcing chamber
77  DF  .~.~.~> Shielding
78  DF  .~.~.~> Operating mechanism structure or arrangement
79  DF  .~.~.~> Grounding switch
80  DF  .~.~.~> Disconnect switch

DEFINITION

Classification: 218/68

Sealed chamber:

(under subclass 43) Subject matter wherein the air-current blowout interrupter units are enclosed in a gas tight or watertight vessel.