×

Energy efficient infrared light switch and method of making same

  • US 5,142,199 A
  • Filed: 11/29/1990
  • Issued: 08/25/1992
  • Est. Priority Date: 11/29/1990
  • Status: Expired due to Fees
First Claim
Patent Images

1. An energy efficient passive light switch operable to selectively activate all, none or a portion only of a bank of lights, comprising:

  • at least two passive detectors, together having a predefined sweep range and said detectors operable to detect energy emitted within a room within said sweep range, said detectors further operable to convert said received energy into a voltage signal;

    at least one first amplification means for each of said detectors, for amplifying said received voltage signal for the respective passive defectors;

    means for mixing said first amplified voltage signals from said passive defectors;

    second amplification means for receiving said mixed first amplified received signals from said passive defectors and amplifying them a second time;

    comparator means for comparing said received mixed amplified signals with a known predetermined signal;

    a signal detection indicator operable to be activated when said received amplified mixed signal is within a predetermined range of said predetermined signal;

    dual power supply means having a first and second power circuit for providing said predetermined signal to said comparator means and for providing power to said passive detectors; and

    selector means cooperatively associated with said passive switch including means to selectively preset said selector means in a first position to activate all of said lights, a second position to activate only a portion of said lights and a third position to not activate any of said light.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×