Electricity: measuring and testing – Magnetic – Displacement
Reexamination Certificate
2006-12-12
2006-12-12
Lee, Diane I. (Department: 2858)
Electricity: measuring and testing
Magnetic
Displacement
C324S207110, C324S547000
Reexamination Certificate
active
07148679
ABSTRACT:
A probe (10) for sensing movement of a body of magnetic material comprises a magnetically energisable pole piece (30), a closed loop electrical circuit (20) having a first end (25) which is wound around the pole piece (30) and forms a pole piece coil (25) inductively coupled to the pole piece, the arrangement being such that movement of a body of magnetic material (70) relative to the pole piece (30)induces a current in the closed loop circuit (20), and a second end (45), remote from the pole piece (30), which forms a transformer primary coil. A transformer secondary coil (65) is inductively coupled to the primary coil (45), and terminated by a load resistance and means for measuring an output signal from the secondary coil. The primary (45) and secondary (65) coils form a transformer such that a current in the primary coil induces a voltage across the secondary coil. One or more shorting turns (60) of a conductor are inductively coupled to the primary (45) and secondary (65) coils.
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Lee Diane I.
Natalini Jeff
Nixon & Vanderhye P.C.
Weston Aerospace Limited
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