Industry Patents
Patent: 3763394
Stage Lighting Systems
(Click image for PDF of full patent)
| Patent Number: |
3763394 |
| Title: |
Stage Lighting Systems |
| Abstract: |
A stage lighting system here utilizes circulating shift registers for
containing many groups of bits for concurrent control of correspondingly
many light-intensity control circuits. Control information can be entered
into each circulating shift register in various ways, as by entering a
group of bits at a time under manual control for establishing a desired
level of control of a given light-intensity control unit, or as by
entering sequences of groups of bits from a memory unit or from another
circulating shift register, or in other ways; and the contents of each
circulating shift register can be recorded in the memory unit.
Each supplied light-intensity control signal is subject to fading under
control of a timed sampling circuit. A supplied light-intensity control
signal is sampled for a part of each of a succession of sampling periods.
The sampling part can be varied from zero to the entire sampling period,
for reducing the supplied light-intensity control signal in accordance
with the ratio of the sampling part of the fade-control period to the
whole sampling period. The same fading control system is extended to
cross-fading by utilizing the remainder of each fade-control period as the
sampling period for another supplied light-intensity control signal.
|
| Country of Issue: |
US |
| First Named Inventor: |
Blanchard |
| Assignee: |
|
| Continuation or Divisional of: |
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| International Classification: |
H05B 39/06 |
| US Classification: |
315/294 |
| Issue Date: |
10-02-1973 |
| Filing Date: |
09-03-1971 |
| Application : |
177701 |
| Notes: |
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| Link to Patent at freepatentsonline.com: |
3763394 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
3763394 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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