Appeal No. 1997-3028
Application 08/290,083
from the storing reservoir 11 into the sealed vessel, thereby
increasing the insulating strength.
Independent claim 1 is reproduced as follows:
1. A gas insulated electric apparatus, comprising:
an elongated insulated electric device;
a plurality of gas section members joined together
to form a gas-tight body having said insulated electric device
therein, extending between said gas section members, with each
gas section member filled at a first pressure with only a
first insulating gas;
detecting means for detecting one of said gas sec-
tion members having metal particles therein, causing an insu-
lation abnormality on said insulated electric device;
electromagnetic valve means connected to said gas
section members;
a gas storage reservoir storing a second insulating
gas, different from the first insulating gas;
gas filling means coupling said gas storage reser-
voir to said electromagnetic valve means and responsive to an
output from said detecting means indicating detection of the
insulation abnormality, for controlling said electromagnetic
valve means to admit at least a portion of the second insulat-
ing gas into said gas section members so that within the gas
section members the second insulating gas mixes with the first
insulating gas and varies the pressure of the insulating gas
mixture in said gas section members so as to increase insula-
tion strength on said electric device therein.
The Examiner relies on the following references:
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