Illumination system and apparatus therefor

• US 4,152,752 A
• Filed: 09/06/1977
• Issued: 05/01/1979
• Est. Priority Date: 09/06/1977
• Status: Expired due to Term

• Current Assignee: Maurice E. Barbara
• Original Assignee: Gary A. Niemi
• Inventors: Niemi, Gary A.
• Primary Examiner(s): Lechert, Jr., Stephen J.
• Application Number:
  US05/830,570
• Time in Patent Office: 602 Days
• Field of Search: 362/32, 362/209, 362/251, 362/145, 362/147, 362/266
• US Class Current: 362/576
• CPC Class Codes: F21S 11/00 Non-electric lighting devices or systems using daylight roofs with sky-light opening E04D13/03; sun blinds for windows with means for redirecting light onto ceiling of a room E06B9/00; hybrid lighting devices combining artificial and natural light F21S19/00; solar heat collectors F24S; solar cells or solar cell modules H01L31/00
• CPC Class Codes: F21S 19/005 Combining sunlight and electric light sources for indoor illumination
• CPC Class Codes: F21S 2/00 Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
• CPC Class Codes: F21V 9/40 with provision for controlling spectral properties, e.g. colour, or intensity
• CPC Class Codes: G02B 6/0096 the lights guides being of the hollow type

Abstract

Disclosed is an illumination system incorporating light pipes distributing light to large numbers of building spacial units, the system employing artificial or natural light sources, light splitters, optical switches, and light fixtures or lamps. Alternate embodiments of light splitters and optical switches are also disclosed as well as a specific type light fixture employing reflector cones, lenses, and a pyramid shaped reflector.

Claims

1. In combination, a building having a plurality of spacial units and a system for the illumination of said plurality of spacial units, said system comprising:

(a) a light source, disposed at a location remote from said spacial units,

(b) a plurality of light fixtures respectively located within said spacial units, said light fixtures dispersing light received thereby throughout said spacial units,

(c) light splitter means in optical communication with said light source for distributing light from said source along respective light paths extending to each of said light fixtures,

(d) each of said light paths defined by light pipes in respective optical communication with said light splitter means and said light fixtures, and

(e) a plurality of optical switches respectively disposed in said light paths between said light splitter means and said light fixtures for alternately enabling and interrupting the passage of light to said light fixtures.

2. The system as defined by claim 1 wherein said light source is an artifical light of high intensity.

3. The system as defined by claim 1 wherein said light source is a solar collector adapted to receive sunlight.

4. The system as defined by claim 1 wherein said light splitter means comprises:

(a) a housing defining a central cavity therein,

(b) means retaining said light pipes in optical communication with, and radially extending from, said central cavity,

(c) means directing light from said source into said cavity, and

(d) reflector means associated with said cavity for directing light within said cavity toward said light pipes.

5. The system as defined by claim 1 wherein said light splitter means comprises:

(a) a housing,

(b) first means directing light from said source into said housing,

(c) second means retaining said light pipes around, and parallel to, said first means, and

(d) reflector means within said housing redirecting light from said first means into said light pipes.

6. The system as defined by claim 1 wherein said light splitter means comprises:

(a) a housing for retention of said light source,

(b) means retaining said light pipes parallel to one another and in optical communication with said light source, and

(c) a plurality of lenses intermediate said light pipes and said source for directing the light from said source through said light pipes.

7. The system as defined by claim 1 wherein said light splitter means comprises:

(a) an annular shaped body defined by top and bottom walls and inner and outer spaced sidewalls,

(b) means retaining said light pipes transverse to, and extending through, respective spaced segments of said outer sidewall,

(c) a plurality of lenses respectively disposed within spaced segments of said inner sidewall and respectively focused upon the ends of said light pipes,

(d) pyramid shaped reflector means having adjacently disposed sloping reflector walls for respectively reflecting light impinging thereupon toward said plurality of lenses, and

(e) means extending through said top wall for focusing light from said source upon said reflector means.

8. The system as defined by claim 1 wherein each of said light fixture means comprises:

(a) an annular shaped body defined by top and bottom walls and inner and outer spaced sidewalls,

(b) a plurality of light cones secured with, and having their axes transverse to, respective spaced segments of said outer sidewall, each of said light cones having an outer reflective surface effective to reflect light received thereby essentially 360°

around such outer surface,

(c) a plurality of lenses respectively disposed within spaced segments of said inner sidewall and respectively focused upon the apex of each cone,

(d) pyramid shaped reflector means having adjacently disposed sloping reflector walls for respectively reflecting light impinging thereupon toward said plurality of lenses, and

(e) means extending through said top wall for focusing light upon said reflector means.

9. The system as defined by claim 1 wherein each of said optical switches comprises:

(a) a disc disposed between aligned segments of the light pipe extending between said light splitter means and said light fixture,

(b) said disc having an opaque portion for preventing the passage of light therethrough and at least one transparent portion for enabling light to pass therethrough, and

(c) means rotating said disc to position said opaque and transparent portions between said aligned segments.

10. The system as defined by claim 9 wherein the disc of said optical switch comprises a plurality of transparent portions of different color properties.

11. The system as defined by claim 9 wherein said at least one transparent portion of said disc is of varying degrees of transparency.