Rotary transducer

  • US 5,621,179 A
  • Filed: 06/05/1995
  • Issued: 04/15/1997
  • Est. Priority Date: 12/12/1992
  • Status: Expired due to Fees
First Claim
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1. A rotary transducer comprising a first electrical coil, leads for electrically connecting said first electrical coil to an AC power supply, an electrical output, and an inductive coupling which inductively couples said electrical output with the first electrical coil and which includes a rotor rotatable about an axis relative to said first electrical coil so that, in use, the electrical output varies in dependence upon the angular position of said rotor about said axis, wherein the first electrical coil comprises first and second coil portions which are mutually displaced axially of the rotor, and wherein said inductive coupling include (a) first and second pole pieces associated respectively with said first and second coil portions and (b) first and second formations on said rotor, said first and second formations being (i) disposed radially inwardly of the respective first and second pole pieces relative to said axis, (ii) mutually axially displaced along the rotor and (iii) respectively inductively associated with the first and second coil portions of the first electrical coil via said first and second pole pieces.

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