×

Two-wire, electronic switch

  • US 5,306,955 A
  • Filed: 04/22/1991
  • Issued: 04/26/1994
  • Est. Priority Date: 04/22/1991
  • Status: Expired due to Fees
First Claim
Patent Images

1. Power coupling apparatus for coupling power from a power source to a switch, which switch is comprised of (a) two inputs, (b) means for sensing a condition, and (c) means, in response thereto, for causing the switch to be on or off at its inputs, one of the inputs being returned to a load that is being switched and the other of the inputs being returned to the power source, the power source being further connected to the load to supply current to the load whenever the switch is on, the power apparatus comprising:

  • switch-off-power means for coupling power from the power source to the switch whenever the switch is off; and

    switch-on-power means for extracting power from the power source and for coupling the extracted power to the switch whenever the switch is on, wherein the switch-on-power means comprises;

    (a) means for extracting current supplied to the load from the power source, and(b) supply means, in response to the extracted current, for providing an output voltage which is coupled to the switch wherein the supply means comprises one or more photovoltaic devices.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×