Speed or torque probe for gas turbine engines
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United States of America Patent
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Oct 8, 2013
Grant Date -
Dec 22, 2011
app pub date -
Jun 16, 2011
filing date -
Jun 22, 2010
priority date (Note) -
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Abstract
There is provided a variable reluctance sensor for sensing the speed or torque of a shaft in a gear box or gas turbine engine, comprising a magnetic pole piece a conductive wire wrapped around the pole piece a housing surrounding the pole piece, the housing having a front face and at least one side wall, wherein, in use, the front face is positioned proximate to an object to be sensed wherein the pole piece is rigidly fixed to the side wall of the housing. This arrangement reduces microphony in the sensor.
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