Industry Patents
Patent: 5004957
Dimming Control Circuit
(Click image for PDF of full patent)
| Patent Number: |
5004957 |
| Title: |
Dimming Control Circuit |
| Abstract: |
A circuit and a method for controlling the dimming of incandescent lights
using a pair of antiparallel connected SCRs which are fired at the same
frequency as the frequency of the AC line power to achieve phase control
of the power supplied to the light. Only one SCR of the pair is utilized
in the 0% to 50% brightness range while both SCRs are utilized in the 51%
to 100% brightness range.
|
| Country of Issue: |
US |
| First Named Inventor: |
Cunningham |
| Assignee: |
Lee Colortran |
| Continuation or Divisional of: |
|
| International Classification: |
H05B 37/02 |
| US Classification: |
315/199 |
| Issue Date: |
04-02-1991 |
| Filing Date: |
01-06-1989 |
| Application : |
294378 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
5004957 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
5004957 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.
Disclaimer: This web site is not intended to offer comprehensive or sufficient
information to enable a full legal analysis of a patent or potential
infringement. The information provided on this web site is intended
as general information only, and is not intended to serve as legal
opinion, legal advice or as a substitute for legal counsel. If you
have a question about a specific factual situation, you should
contact an attorney directly
|
