Appeal No. 1997-3028
Application 08/290,083
insulating gas of a different kind from the insulating gas
filled in the sealed vessel. Appellants disclose preferably
that the insulating gas of a different kind is preferably one
of the fluorocarbon gases, pentafluoropropionyl fluoride,
carbon fluoride nitrile compounds or bromoclorodifluoromethan.
On page 7 of the specification, Appellants disclose that the
gas
sections in the sealed vessel have disposed sensors 13a and
13b. These sensors detect an abnormality in the insulation
strength of the gas. The output of this abnormality from the
sensors is sent to the abnormality monitoring device 16. On
page 8 of the specification, Appellants disclose that the
output of the abnormality monitoring device 16 is inputted
into a valve control device 20 and the output of the valve
control device 20 is sent to a trip circuit 21 for opening and
closing the corresponding electromagnetic valves 8a to 8d and
9. This allows the gas of a different kind to be injected
3
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