Industry Patents
Patent: 4931916
Apparatus for Mechanically Adjusting Lighting Fixture Beam Azimuth and Elevation
(Click image for PDF of full patent)
| Patent Number: |
4931916 |
| Title: |
Apparatus for Mechanically Adjusting Lighting Fixture Beam Azimuth and Elevation |
| Abstract: |
A light projector, suitable for entertainment lighting and comprising a
light source and associated light collecting means producing an elongated
beam having an optical centerline that is preferably substantially
horizontal, is provided with a means, typically a mirror, mounted to a
first support adapted for rotation about an axis coincident with that
centerline, for redirecting the beam through a first plane perpendicular
to that substantially horizontal axis and centerline. A second mirror is
rotatably mounted to the first support so that the redirected beam falls
upon it, redirecting the beam a second time, through a second plane
perpendicular to the centerline of the beam in the region between the
first and second mirrors; a second plane that is also substantially
parallel to the axis of rotation of the first support. The first support
is supported for rotation about said axis on both sides of the means for
redirecting.
|
| Country of Issue: |
US |
| First Named Inventor: |
Callahan |
| Assignee: |
|
| Continuation or Divisional of: |
4769743 |
| International Classification: |
G03B 15/02 |
| US Classification: |
362/272 |
| Issue Date: |
06-05-1990 |
| Filing Date: |
08-08-1988 |
| Application : |
229581 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
4931916 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
4931916 at Google Patents |
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after the patent has issued - they take a while to get new patents in their systems.
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