Industry Patents
Patent: 3970893
Apparatus for Controlling the Intensity of Lights
(Click image for PDF of full patent)
| Patent Number: |
3970893 |
| Title: |
Apparatus for Controlling the Intensity of Lights |
| Abstract: |
A latching circuit is used to exclusively select either a full intensity
command signal, a presettable intermediate intensity command signal or a
zero intensity command signal. The command signals are fed to an output
signal generating circuit which controls a variable voltage supply source
for a lighting system. A null comparator and integrating circuit compares
the output signal with the selected command signal and increases or
decreases the output signal until it is in conformity with the selected
command signal. Circuits are also disclosed which provide the capability
of changing the intensity of the lights between two preselected
intermediate intensity levels or between any two of a number of
preselected intermediate intensity levels.
|
| Country of Issue: |
US |
| First Named Inventor: |
Bryant |
| Assignee: |
Strand Century |
| Continuation or Divisional of: |
|
| International Classification: |
H05B 41/38 |
| US Classification: |
315/293 |
| Issue Date: |
07-20-1976 |
| Filing Date: |
11-27-1974 |
| Application : |
527922 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
3970893 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
3970893 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
|
