Industry Patents
Patent: 4855884
Variable Beamwidth Stage Light
(Click image for PDF of full patent)
| Patent Number: |
4855884 |
| Title: |
Variable Beamwidth Stage Light |
| Abstract: |
A variable beamwidth stage light relying upon an axially movable reflector
for changes in beamwidth. The reflector has a plurality of radially
outwardly and axially forwardly extending leaves in side-by-side relation
to define a bowl-shaped reflector surface. A stationary support flange is
in frictional contact with the radially outward surface of each leaf. The
reflector leaves are sandwiched between a base member and a ring member at
the base of the reflector. A motor driven lead screw is attached to the
base member to cause axial movement of the reflector relative to the
support flange. The reflector defines a first and a second focal point
along the axis of the reflector. A light source is fixed at the first
focal point, which remains substantially fixed relative to the base
member. Contact of the support flange with the reflector leaves causes the
diameter of the reflector leaves to vary as the base member is moved,
thereby causing displacement of the second focal point and variation of
the bandwidth issuing from the reflector.
|
| Country of Issue: |
US |
| First Named Inventor: |
Richardson |
| Assignee: |
Morpheus Lights |
| Continuation or Divisional of: |
|
| International Classification: |
F21V 7/00 |
| US Classification: |
362/278 |
| Issue Date: |
08-08-1989 |
| Filing Date: |
12-02-1987 |
| Application : |
127932 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
4855884 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
4855884 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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