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Methods and apparatus for determining the location of a shaft within a vessel

  • US 6,434,847 B1
  • Filed: 11/02/1999
  • Issued: 08/20/2002
  • Est. Priority Date: 11/02/1999
  • Status: Expired due to Term
First Claim
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1. An apparatus mountable to a shaft disposed within a vessel and adapted for measuring the magnitude by which the centerline of the shaft is offset from the central axis of the vessel, comprising:

  • (a) a housing comprising a coupling component for coupling the housing to the shaft;

    (b) a plunger slidably mounted to the housing, the plunger having an outer section extending radially outwardly beyond a wall of the housing, and having means for biasing the plunger radially outwardly;

    (c) a transducer operatively mounted to the housing and adapted to encode positions of the plunger and to produce an electrical signal proportional to a change in position resulting from displacement of the plunger; and

    (d) means for transferring the signal away from the housing.

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