LIGHT FIXTURE WITH CHANGING LIGHT EMISSION

• US 3,701,897 A
• Filed: 11/25/1970
• Issued: 10/31/1972
• Est. Priority Date: 11/25/1970
• Status: Expired due to Term

• Current Assignee: Davis W. Pennington, Ruth N. Taylor
• Original Assignee: Davis W. Pennington, Ruth N. Taylor
• Inventors: Pennington, Davis W., Taylor, Ruth N.
• Primary Examiner(s): Samuel S. Matthews
• Assistant Examiner(s): Richard A. Wintercorn
• Application Number:
  US05/092,579
• Time in Patent Office: 706 Days
• Field of Search: 240/10.1,78CF,108 40/33,77,133A,133B,106.53
• US Class Current: 362/278
• CPC Class Codes: F21S 10/00 Lighting devices or systems producing a varying lighting effect
• CPC Class Codes: F21V 1/10 Rotating shades
• CPC Class Codes: F21V 11/14 with many small apertures
• CPC Class Codes: F21V 17/02 with provision for adjustment F21V17/04 - F21V17/08 take precedence
• CPC Class Codes: F21V 5/005 using microprisms
• CPC Class Codes: F21V 5/06 Hanging lustres for chandeliers
• CPC Class Codes: F21Y 2113/00 Combination of light sources
• CPC Class Codes: Y10S 362/811 Psychedelic lighting

Abstract

A light fixture having a light source surrounded by an opaque cylinder member having a large number of small holes therein for permitting light to pass therethrough into a set of prisms disposed in a cylinder just outside said cylinder member, and a motor to rotate said cylinder member about its axis, said prisms being elongated substantially parallel to said axis, said cylinder member being flexible to permit it to be mounted on three spokes radiating from the output rotary shaft of said motor by said spokes being received through three of said holes in said cylinder member.

Claims

1. A light fixture with changing light emission comprisinG:

a light source;

a large number of prisms surrounding said light source, said prisms being joined together in a prism assembly generally arranged about a predetermined axis;

light interuption means surrounding said light source at a position between said light source and said prisms, said light interruption means having a plurality of small areas which interupt the light substantially less than other areas on said light interuption means, said light interuption means comprising a circular member mounted on the same axis as said predetermined axis; and

power means to change the position of said light interuption means relative to said prisms.

2. The fixture set forth in claim 1 wherein:

said prisms are elongated in a direction extending at a right angle to the direction of movement of said light interuption means.

3. The fixture set forth in claim 1 wherein said prisms are elongated in parallel to said axis.

4. The fixture set forth in claim 1 wherein:

said power means constantly changes the position of said light interuption means in one direction around the light source; and

the distance between individual ones of said small areas in the direction of movement of said light interuption means is approximately equal to the distance between the center lines of two adjacent individual prisms in the direction of movement of the interuption means.

5. A light fixture with changing light emission comprising:

a light source;

a first set of prisms surrounding said light source;

light interuption means surrounding said light source at a position between said light source and said prisms, said light interuption means having a plurality of small areas which interupt the light substantially less than other areas on said light interuption means;

a second set of prisms arranged in a circle around said light source, said second set of prisms being located on the side of said first mentioned prisms away from said light source; and

power means to change the position of said light interuption means relative to said prisms.

6. A light fixture with changing light emission comprising:

a light source;

power means including a shaft which is rotated and a plurality of spokes radiating from said shaft at substantially a right angle to the shaft; and

light interuption means surrounding said light source, said light interuption means comprising;

a cylinder having a plurality of light conducting areas therein, which interupt the light substantially less than other areas on said cylinder, said cylinder being flexible so as to permit it to be flexed from a circular cross section to an elliptical cross section, said cylinder being mounted on said plurality of spokes by said spokes being received through different ones of holes in said cylinder, and said cylinder is adapted to be flexed to an elliptical shape in order to permit the cylinder to be mounted on said spokes.

7. The fixture set forth in claim 6 wherein said cylinder has a resiliency to return it back to its circular cross section, and said spokes are at least three spaced substantially equidistant apart, whereby the cylinder will tend to automatically orient itself concentric to said axis when the cylinder is released.