Master electrical load control system

  • US 4,889,999 A
  • Filed: 09/26/1988
  • Issued: 12/26/1989
  • Est. Priority Date: 09/26/1988
  • Status: Expired due to Term
First Claim
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1. A system to control power from an a.c. line to a plurality of loads, including lighting loads, comprising, in combination,(a) a plurality of wallbox dimmers, each controlling power to one of said lighting loads, each of said dimmers comprising, in proximate relationship,(i) a dimming circuit to control power to said load,(ii) dimmer control means to provide a dimmer control signal to said dimming circuit for determining power to said load, and(iii) switch means in electrical communication with said dimming circuit to turn power to said load off and on to a level determined by said dimming circuit;

  • (b) master control means to provide, for each of said loads, a master control signal for determining power to said load; and

    (c) isolation means to accept said master control signals from said master control means and provide output signals to corresponding dimming circuits.

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