US PATENT SUBCLASS 218 / 135
.~.~.~.~ Bellows

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}
134  DF  .~.~.~ Housing structure {3}
135.~.~.~.~ Bellows

DEFINITION

Classification: 218/135

Bellows:

(under subclass 134) Subject matter including a folding, flexible, or collapsible header to maintain air-tightness of the vacuum switch housing.

(1) Note. The bellows is usually mounted to the contact rod supporting the movable contact and to the housing. This flexible component allows the movable contact to reciprocate

in contrast to Class 313 and Class 315 space discharge devices wherein the electrode assemblies are spaced and held fixed with respect to one another.