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Programmable remote control systems for electrical apparatuses

  • US 5,898,384 A
  • Filed: 12/22/1995
  • Issued: 04/27/1999
  • Est. Priority Date: 04/08/1992
  • Status: Expired due to Term
First Claim
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1. A system for controlling the operation of an electrical apparatus, said system comprising:

  • a system control center for controlling a control unit remotely located from said control center and associated with an electrical apparatus in accordance with an individual operating protocol of said control unit, said system control center including memory means containing said operating protocol;

    transmission means associated with said system control center for transmitting a programming signal to said control unit designating said operating protocol and a geographical location of said control unit and for further transmitting a timing reference signal to said control unit designating the occurrence of an event at a benchmark geographical location;

    said control unit including receiver means for receiving said timing reference signal;

    timing means associated with said control unit and responsive to said timing reference signal for initiating a timing period having a duration determined based upon the relation between said benchmark geographical location and said geographical location of said control unit;

    control circuit means responsive to expiration of said timing period for controlling the application of operating current to electrical circuitry within said electrical apparatus; and

    a response transmitter responsive to the operation of said control circuit means for selectively transmitting at least one answer back message to a receiving unit associated with said system control command center for comparison with said stored protocol, whereby said electrical apparatus is verifiably operated in accordance with said operating protocol.

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