Solid state rotary apparent beacon

• US 5,694,112 A
• Filed: 12/12/1994
• Issued: 12/02/1997
• Est. Priority Date: 12/12/1994
• Status: Expired due to Term

• Current Assignee: Grote Industries Incorporated
• Original Assignee: Grote Industries Incorporated
• Inventors: VannRox, Robert S., Rigsby, Bruce Scott, Roney, Troy Lynn
• Primary Examiner(s): Hofsass, Jeffery
• Assistant Examiner(s): LIEU, JULIE BICHNGOC
• Application Number:
  US08/353,899
• Time in Patent Office: 1,086 Days
• Field of Search: 340/468, 340/471, 340/472, 340/478, 340/981, 340/983, 362/74
• US Class Current: 340/472
• CPC Class Codes: B60Q 1/2611 Indicating devices mounted on the roof of the vehicle
• CPC Class Codes: F21S 10/06 flashing, e.g. with rotating reflector or light source signalling lighting devices mounted on vehicles B60Q1/26
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]

Abstract

A completely solid state rotary beacon which produces a rotary beacon lighting effect without the use of mechanical components or rotating parts. The device of the present invention includes a plurality of light sources which are equicircumferentially spaced around the outer perimeter of the rotary beacon. These light sources are intermittently illuminated by an electronic controller in such a fashion that the illusion of a rotating light beacon is produced without the need for rotating mechanical components. The lighting sequence, in conjunction with the unique parabolic reflector arrangement of the present invention, create the illusion of a light source being rotated in a 360° path. This effect is achieved by the present invention without the use of rotating mechanical components.

Claims

1. A rotary apparent beacon, comprising:

a plurality of at least five light sources fixedly mounted to a housing and spaced around a circumference;

a controller coupled to the plurality of light sources and operable to sequentially illuminate the plurality of light sources in a walking pattern to create an apparent rotary beacon light effect; and

a plurality of reflectors respectively associated with the light sources;

wherein the reflectors include a leading generally surface operative angularly displaced from a radial direction of the circumference.

2. The rotary apparent beacon of claim 1, wherein the plurality of reflectors further include a trailing generally parabolic surface operative to reflect light from the associated light source substantially in a second direction angularly displaced from the radial direction of the circumference, such that light reflected by the trailing parabolic surface associated with a first one of the plurality of light sources partially overlaps light reflected by the leading parabolic surface associated with a second one of plurality of light sources, the first and second light sources being circumferentially adjacent.

3. The rotary apparent beacon of claim 1, wherein each of the plurality of reflectors includes a bottom reflective surface operative to reflect light from below the associated light source substantially in the radial direction of the circumference.

4. The rotary apparent beacon of claim 1, wherein each of the plurality of reflectors includes a top reflective surface operative to reflect light from above the associated light source substantially in the radial direction of the circumference.

5. A rotary apparent beacon, comprising:

a plurality of at least five light sources fixedly mounted to a housing and spaced around a circumference;

a controller coupled to the plurality of light sources and operable to sequentially illuminate the plurality of light sources in a walking pattern to create an apparent rotary beacon light effect; and

a plurality of reflectors respectively associated with the light sources;

wherein the reflectors include a leading generally parabolic surface operative to reflect light from the associated light source substantially in a first direction angularly displaced from a radial direction of the circumference; and

wherein each of the plurality of reflectors includes a blending radius surface located on an axis defined by the first direction and operative to cause the reflected light to be of substantially equal intensity at all points in the reflected light beam equidistant from the associated light source.

6. The rotary apparent beacon of claim 5, wherein the blending radius surface comprises an elliptical cylindrical section.

7. A rotary apparent beacon comprising:

a plurality of at least five light sources fixedly mounted to a housing and spaced around a circumference;

a contoller coupled to the plurality of light sources and operable to sequentially illuminate the plurality of light sources in a walking pattern to create an apparent rotary beacon light effect; and

a plurality of reflectors, each of the plurality of reflectors being associated with one of the plurality of light sources;

wherein each of the plurality of reflectors is operative to produce a reflected beam such that the reflected beam of circumferentially adjacent light sources partially overlap.

8. A rotary apparent beacon, comprising:

plural means for illumination substantially equally spaced around a circumference;

means for controlling coupled to the plural means for illumination and operable to sequentially illuminate the plural means for illumination in a walking pattern;

wherein illumination from the plural means for illumination is directed in a substantially radial direction;

plural means for reflecting, each of the plural means for reflecting being associated with one of the plural means for illumination;

wherein each of the plural means for reflecting includes a leading parabolic surface means for reflecting light from the associated means for illumination substantially in a first direction angularly displaced from a radial direction of the circumference.