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Synchronized network of electronic devices including back-up master units

  • US 5,751,220 A
  • Filed: 07/14/1995
  • Issued: 05/12/1998
  • Est. Priority Date: 07/14/1995
  • Status: Expired due to Term
First Claim
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1. A method of synchronizing a plurality of electronic devices including a master unit and a plurality of other units, comprising the steps of:

  • transmitting a synchronizing signal at predetermined intervals from the master unit to at least one of the other units; and

    in each of at least two of the other units, detecting whether a synchronizing signal is received by the respective other unit within a respective predetermined period of time and changing a mode of operation of the respective other unit if a synchronizing signal is not received by the respective other unit within the respective predetermined period of time, each of said synchronizing signals for initiating an operation of a device which receives the respective synchronizing signal.

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