×

Device for detecting damage on rotators

  • US 4,007,630 A
  • Filed: 07/09/1975
  • Issued: 02/15/1977
  • Est. Priority Date: 07/12/1974
  • Status: Expired due to Term
First Claim
Patent Images

1. A device for detecting damage on a rotator by converting into electric signals the mechanical oscillation or sound produced when said rotator is rotated, and evaluating the amplitude of the electric signals originating from the presence of damage on the rotator manifested as an impulsive oscillation having a period dependent upon the rate of rotation of said rotator, said device comprising:

  • a peak detector for detecting the peak value of said electric signals and holding that value as a DC level,a reset pulse generator for generating reset pulses having a predetermined pulse repetition rate to reset said peak detector at a predetermined time interval, the repetition rate of the reset pulses being predetermined so that said peak detector repeats at least twice the cycle of peak detecting, holding and resetting during one period of said impulsive oscillation, andmeans for deriving an output signal from said peak detector.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×