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Communication and coding system for controlling electrical actuators

  • US 5,923,271 A
  • Filed: 07/02/1997
  • Issued: 07/13/1999
  • Est. Priority Date: 07/04/1996
  • Status: Expired due to Fees
First Claim
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1. A communication and coding system, comprising:

  • at least one electrical actuator arranged for connection to an electrical mains supply for feeding to said actuator a sinusoidal voltage;

    at least one remote command device associated with each said actuator;

    at least one electrical load element arranged to have electrical power dissipated by operation thereof;

    each said electrical load element having at least one neutral conductor effectively connected thereto and being arranged for connection to the electrical main supply;

    respective electrical connection means effectively connecting each said electrical load element with a respective said actuator;

    each said remote command device being arranged to provide as an output, and each said actuator being arranged to receive from a respective at least one remote command device as an input, at least one specific command, providing electronic coding for at least one of feeding, interrupting feeding and adjusting feeding of electrical power to a respective said load element;

    each said remote command device and each said actuator being arranged to be connected to a phase of the electrical mains supply;

    each said actuator being effectively connected to a respective at least one remote command device by a respective electrical control conductor for collecting electrical signals for the respective said actuator from the respective at least one remote command device, for controlling a respective said electrical load via the respective said actuator;

    said electronic coding, as fed along the respective said electrical control conductor, including a train of sinusoidal half-waves, in which variation with time of each half wave thereof is divided into three portions, of which a first portion corresponds to a first time period, during which the respective said electrical control conductor conducts, a second portion corresponds to a second time period, during which the respective said electrical conductor is not conducting, and a third portion corresponds to a third time period, during which the respective said electrical conductor conducts.

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