US PATENT SUBCLASS 218 / 139
.~.~ Housing structure
Current as of:
June, 1999
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218 /
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HIGH-VOLTAGE SWITCHES WITH ARC PREVENTING OR EXTINGUISHING DEVICES
1
DF
ARC PREVENTING OR EXTINGUISHING DEVICES
{14}
118
DF
.~ Vacuum {5}
139
.~.~ Housing structure
DEFINITION
Classification: 218/139
Housing structure:
(under subclass 118) Subject matter including specific structure details of a casing or an envelope for enclosing the vacuum switching elements.
SEE OR SEARCH THIS CLASS, SUBCLASS:
97+, for details of liquid circuit interrupter housing.
134+, for details of single-phase vacuum circuit interrupter housing.
155+, for details of housing of general arc preventing device.