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Multi-zone lighting control system

  • US 5,990,635 A
  • Filed: 06/22/1998
  • Issued: 11/23/1999
  • Est. Priority Date: 04/11/1994
  • Status: Expired due to Term
First Claim
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1. In a light dimmer adapted to control the current flow through a lighting load to selectively adjust the luminous output thereof, said light dimmer comprising a dimming circuit connected between a power source and said lighting load, said dimming circuit being responsive to a dimming level control signal applied to an input terminal thereof for selectively varying the RMS voltage across the lighting load, the improvement comprising:

  • (a) means for sensing an absence of said dimming level control signal on said input terminal;

    (b) circuit breaker means for selectively switching power OFF and ON between said power source and said dimming circuit; and

    (c) logic and control means operatively coupled to said sensing means and said circuit breaker means for applying a predetermined dimming level control signal to said control circuit in response to both an absence of said dimming level control signal on said input terminal and a cycling of said circuit breaker means OFF and then ON.

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