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Two terminal controller

  • US RE35,220 E
  • Filed: 07/08/1993
  • Issued: 04/30/1996
  • Est. Priority Date: 05/25/1988
  • Status: Expired due to Term
First Claim
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1. A two-terminal power control device normally in an off condition until activated by switch means .Iadd.to conduct power from an AC power source to a power load, .Iaddend.said device comprising:

  • a. input and output terminals . .adjacent an.!. .Iadd.adapted to be connected to the .Iaddend.AC power source and . .a.!. .Iadd.the .Iaddend.power load, respectively;

    b. . .A.!. .Iadd.a .Iaddend.bi-directional dual silicon controlled rectifier responsive to low voltage current pulses, said rectifier in series with and between the input and output terminals;

    c. micro-processor control circuit means in series with and providing triggering signals to the rectifier, and responsive to momentary power interruptions in the form of operator-controlled . .activation.!. .Iadd.activations .Iaddend.of the switch means;

    d. DC power supply means connected across the rectifier to provide power to the control circuit means when the rectifier is in a state of high or low impedance . .and.!. in . .absence.!. .Iadd.the presence .Iaddend.of AC potential across the rectifier;

    e. memory data retention means coupled to control circuit means to retain . .recently.!. stored data during periods of power removal from said AC power source,f. .Iadd.the .Iaddend.input and output terminals on opposed upper and lower surfaces of a package, said package having dimensions . .such that it is.!. .Iadd.to allow it to be .Iaddend.retained between an Edison-style lamp screw shell housing and an incandescent bulb inserted therein, andg. said power control device being provided with a timer responsive to momentary power interruptions.

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