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System for time stamping events using a remote master clock

  • US 5,027,297 A
  • Filed: 09/29/1989
  • Issued: 06/25/1991
  • Est. Priority Date: 09/29/1989
  • Status: Expired due to Fees
First Claim
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1. A system for time-stamping events using a remote master clock, said system comprising:

  • a slave station including;

    detection means detecting the occurrence of a predetermined event;

    pulse generating means generating clocking pulses at predetermined timed intervals; and

    counting means responsive to detection by said detection means of said predetermined event to initiate a count of said clocking pulses;

    communications means transmitting said count in response to a send command;

    means generating said send command; and

    a master station including;

    a master clock maintaining absolute time; and

    processing means responsive to said master clock and said count transmitted by said communications means for calculating an absolute time at which said predetermined event occurred from said count, the absolute time maintained by the master clock, the predetermined time interval between clocking pulses, and a transmission time representing the time required for transmission of said count from said slave station to said master station over said communication means.

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