US1466497A - Indirect-lighting fixture - Google Patents

Indirect-lighting fixture Download PDF

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Publication number
US1466497A
US1466497A US412818A US41281820A US1466497A US 1466497 A US1466497 A US 1466497A US 412818 A US412818 A US 412818A US 41281820 A US41281820 A US 41281820A US 1466497 A US1466497 A US 1466497A
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United States
Prior art keywords
fixture
reflector
indirect
lighting fixture
lighting
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Expired - Lifetime
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US412818A
Inventor
Wood Albert
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Henry Ford Hospital
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Henry Ford Hospital
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Priority to US412818A priority Critical patent/US1466497A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V7/00—Reflectors for light sources
    • F21V7/04—Optical design

Definitions

  • My invention relates to lighting fixtures of the indirect type in which the reflecting bowl is substantially opaque.
  • the object of the invention is to provide means by which the lower surface of a fixture may be illuminated.
  • a totally indirect lighting fixture the bottonr of the bowl is in a very deep shadow and the fixture appears as a dark spot against the illuminated ceiling. Because of this shadow the design and beauty of the under surface or" the fixture is lost and the appearance of the fixture as a dark spot on the ceiling is objectionable. In many cases, as for example, in hospitals if the fixture is made semi-direct or transparent there is too much light for the comfort of the patient.
  • my present device is to eliminate the objectional features of the full indirect lighting and yet have its advantages.
  • I accomplish the above object by providing a supplemental reflecting member which I have termed a reflectorette placed beneath the main reflector and having a contour such that the rays of light from the lamps in the reflector are thrown upon the outer surface of the lighting fixture.
  • the figure is a vertical central section of the fixture, parts being shown in elevation.
  • an opaque reflector 1 is shown as suspended from the ceiling 2 by any suitable supporting means 3. Beneath the lower end of the fixture l, Iprovide a supplemental reflector 4 which in the present embodiment is shown as supported by an arm 5 attached to the main supporting member 3.
  • An opening 6 is provided in the lower end of the reflector 1 through which light from the lamps 7 may reach the reflector 4 and be reflected upward against the outer surface of the fixture.
  • the upper surface of the reflector 4 will have such a contour that. the rays of light will be directed to give a proper illumination of the particular con-- figuration selected for the main reflector 1.
  • the size of the opening 6 and the width and position of the reflector 4 will be such that the lamps 7 cannot be seen from any point below the fixture.
  • the indirect lighting fixture will no longer appear as a dark spot against a light ceiling, and any surface ornamentation upon. the lower portion of the fixture will be made visible without causing any annoying brightness due to over illumination.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Securing Globes, Refractors, Reflectors Or The Like (AREA)

Description

' Aug. 28, 1923. 1,466.49?
A. \NOOD INDIRECT LIGHTING FIXTURE Filed Sept. 25 1920 1 Hrozuegd Patented Aug. 28, 1923.
OF DETROIT, MICHIGAN, A CORPORATION OF'MICHIGAN.
INDIRECT-LIGHTING- FIXTURE.
Application filed September 25, 1920. Serial No; 412,818.
To all whom it may concern:
Be it known that I, ALBERT 7001), a citizen of the United States of America, residing at Dearborn, in the county of Wayne and State of Michigan, have in vented certain new and useful Improvements in Indirect-Lighting Fixtures, of which the following is a specification, reference being had therein to the accompanying drawings.
My invention relates to lighting fixtures of the indirect type in which the reflecting bowl is substantially opaque.
The object of the invention is to provide means by which the lower surface of a fixture may be illuminated. In a totally indirect lighting fixture the bottonr of the bowl is in a very deep shadow and the fixture appears as a dark spot against the illuminated ceiling. Because of this shadow the design and beauty of the under surface or" the fixture is lost and the appearance of the fixture as a dark spot on the ceiling is objectionable. In many cases, as for example, in hospitals if the fixture is made semi-direct or transparent there is too much light for the comfort of the patient.
The purpose of my present device is to eliminate the objectional features of the full indirect lighting and yet have its advantages. I accomplish the above object by providing a supplemental reflecting member which I have termed a reflectorette placed beneath the main reflector and having a contour such that the rays of light from the lamps in the reflector are thrown upon the outer surface of the lighting fixture.
The figure is a vertical central section of the fixture, parts being shown in elevation.
In the drawing an opaque reflector 1 is shown as suspended from the ceiling 2 by any suitable supporting means 3. Beneath the lower end of the fixture l, Iprovide a supplemental reflector 4 which in the present embodiment is shown as supported by an arm 5 attached to the main supporting member 3. An opening 6 is provided in the lower end of the reflector 1 through which light from the lamps 7 may reach the reflector 4 and be reflected upward against the outer surface of the fixture. The upper surface of the reflector 4 will have such a contour that. the rays of light will be directed to give a proper illumination of the particular con-- figuration selected for the main reflector 1. The size of the opening 6 and the width and position of the reflector 4 will be such that the lamps 7 cannot be seen from any point below the fixture.
It will be obvious that instead of a single reflector 4 and a single opening 6, I may use any number of supplemental reflectors,
arranged in such positions and having such configurations as to produce any illuminating efl'ect desired upon the outer surface of the fixture 1. r
By the use of my device the indirect lighting fixture will no longer appear as a dark spot against a light ceiling, and any surface ornamentation upon. the lower portion of the fixture will be made visible without causing any annoying brightness due to over illumination.
What I claim is In an indirect lighting fixture, an opaque reflector having an opening in its lower,cen-
tral portion, a supporting means to which the reflector is attached, plurality of lamps attached to the supporting means, an arm secured to the supporting means and extending through the opening in said reflector and a supplemental reflector supported by the arm beneath the. first named reflector, said arm being secured to the center of the upper In testimony whereof I atfix my signature in presence of two witnesses. 7
- ALBERT WOOD. l/Vitnesses J. EMME'r HALL, GERTRUDE' LORD.
US412818A 1920-09-25 1920-09-25 Indirect-lighting fixture Expired - Lifetime US1466497A (en)

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US412818A US1466497A (en) 1920-09-25 1920-09-25 Indirect-lighting fixture

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US1466497A true US1466497A (en) 1923-08-28

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