Industry Patents
Patent: 5143447
Lamp System Having a Torroidal Light Emitting Member
(Click image for PDF of full patent)
| Patent Number: |
5143447 |
| Title: |
Lamp System Having a Torroidal Light Emitting Member |
| Abstract: |
A lamp assembly particularly for a luminaire comprising a lamp having a
light emitting member of generally torroidal shape and a reflector
positioned and shaped to reflect light received from the light emitting
member through the central opening. The light emitting member is
preferably a filament of an incandescent lamp. The reflector has a
cross-section comprising first and second arcs which are substantially
symmetrical with respect to a line joining the center of the reflector and
a point substantially at the center of the torroidal member and the shape
of the reflector is that described by rotating the arcs about the line.
The arcs may be elliptical or circular for example with their foci or
centers positioned to achieve the required effect.
|
| Country of Issue: |
US |
| First Named Inventor: |
Bertenshaw |
| Assignee: |
Strand Lighting |
| Continuation or Divisional of: |
|
| International Classification: |
F21Y 7/14 |
| US Classification: |
362/297 |
| Issue Date: |
09-01-1992 |
| Filing Date: |
08-05-1991 |
| Application : |
740295 |
| Notes: |
|
| Link to Patent at freepatentsonline.com: |
5143447 at Freepatentsonline |
| Link to World Patent Family1: |
World Patent Family at European Patent Office |
| Link to Google Patents1: |
5143447 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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