Measuring and testing – With fluid pressure – Dimension – shape – or size
Patent
1996-08-09
1998-04-14
Williams, Hezron E.
Measuring and testing
With fluid pressure
Dimension, shape, or size
73 40, 73 52, 73592, 73775, 324460, 324409, 340626, 340644, 340605, G01L 2100, H01H 3366, G01R 3102, G01B 718
Patent
active
057394199
ABSTRACT:
An apparatus for monitoring the vacuum of a vacuum switch having at least one vacuum switch tube with a switch chamber and switch contacts is provided. The apparatus has a remotely interrogatable pressure measurement sensor in the form of a piezocrystal or surface acoustic (SAW) device arranged in the interior of the vacuum switch tube and a remote interrogation device placed external to the vacuum switch for monitoring the vacuum via the sensor.
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Sockl et al., "Electrische Messtechnik".
Bulst Wolf-Eckhart
Maier Reinhard
Ostertag Thomas
Sczesny Oliver
Siemens Aktiengesellschaft
Wiggins J. David
Williams Hezron E.
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