×

Drill monitor system

  • US 4,251,872 A
  • Filed: 02/16/1979
  • Issued: 02/17/1981
  • Est. Priority Date: 02/16/1979
  • Status: Expired due to Term
First Claim
Patent Images

1. A motor monitor system comprising:

  • (a) a numerically controlled machine to accomplish a task requiring repeated mechanical loading of an electric motor;

    (b) sensors responsive to changes in criteria indicative of whether mechanical loading of said electric motor has occurred and for generating a first signal;

    (c) a drill monitor interface responsive to said first signals for sampling said first signals at two times just prior to and again after the theoretical occurrence of the mechanical loading, and for comparing said first signals as sampled at said two times and for generating a hit/miss signal for said electric motor and for generating an interrupt request after generation of said hit/miss signal;

    (d) a means for predicting mechanical loading and informing said drill monitor interface when mechanical loading of said motor should occur for sending a second signal to said drill monitor interface informing it that mechanical loading should occur just after generation of said second signal;

    (e) a digital processor controlling a stop mechanism in said numerically controlled machine and electrically linked to said drill monitor interface for receiving said interrupt request and said hit/miss signal from said drill monitor interface and programmed to analyze said hit/miss signals for a miss by said electric motor and to issue a stop command to said numerically controlled machine upon detection of a miss.

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