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METHOD AND APPARATUS TO MONITOR QUALITY OF OPERATION OF A PISTON IN A CYLINDER

  • US 3,783,681 A
  • Filed: 01/16/1973
  • Issued: 01/08/1974
  • Est. Priority Date: 01/22/1972
  • Status: Expired due to Term
First Claim
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1. Method of monitoring quality of operation, for example running smoothness, of a piston (P) in a cylinder (C), the cylinder having a cylinder sleeve (1) in which an output signal representative of piston operation is obtained, comprising the steps of sensing the deflection of the cylinder sleeve (1) with respect to the cylinder (C) as the piston (P) operates within the cylinder sleeve (1);

  • and deriving said output signal as a representation of said sensed deflection.

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