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SONIC MEANS FOR DETECTING COMPRESSOR STALL

  • US 3,872,292 A
  • Filed: 07/26/1973
  • Issued: 03/18/1975
  • Est. Priority Date: 07/26/1973
  • Status: Expired due to Term
First Claim
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1. A condition detection system for rotating machinery comprising:

  • first and second sonic detectors located at discrete and separate locations on the machinery for generating respective first and second signals;

    a speed detector for generating a third signal indicative of the rotational speed of the machinery; and

    computer means connected to receive said first, second and third signals for producing an output signal indicative of the condition.

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