Industry Patents

Patent: 4241295

Digital Lighting Control System

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Patent Number:	4241295
Title:	Digital Lighting Control System
Abstract:	A lighting control system for the control of the intensity of a plurality of lights, such as in theatre and television lighting, operating entirely by digital means. A novel trigger pulse generating means provides a trigger pulse for each SCR-type dimmer the phase angle of which pulse is a function of a binary encoded intensity indicating signal. The transfer characteristic of the system is controlled by a time-base generator providing and accumulating a phase encoded pulse train using information stored in a memory. The entire process is accomplished by binary means. The system provides more reliable, dependable and accurate lighting control at less cost, with especial reference to the marginal dimmer cost, than systems heretofore available.
Country of Issue:	US
First Named Inventor:	Williams
Assignee:
Continuation or Divisional of:
International Classification:	H05B 39/08
US Classification:	315/294
Issue Date:	12-23-1980
Filing Date:	02-21-1979
Application :	13080
Notes:
Link to Patent at freepatentsonline.com:	4241295 at Freepatentsonline
Link to World Patent Family¹:	World Patent Family at European Patent Office
Link to Google Patents¹:	4241295 at Google Patents

1. The Google Patents and World Patent Family links will likely not work until a few weeks
after the patent has issued - they take a while to get new patents in their systems.

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