US1900380A - Lighting fixture - Google Patents

Description

I March 7, 1933. R B H LE I 1,900,380

LIGHTING FIXTURE Filed April 4, 1932 Flt-3-1- IN VEN TOR.

Pea/6m B. Ha/e WW ATTORNEY r=ous requirements of difierent specific appli- Patented Mar. 7,1933

TREUBYEN RHALE, or SANFRANCISCO, CALIFORNIA LIGHTING Application filed April 4,-

VTherpresent invention relates to lighting fixtures, and more particularly to thatclass ofthese devices which is-especially designed to reflect and diffuse light so as to {obtain the most efiicient distribution thereof.

Lighting fixtures for industrial lighting have been developed to a high degree of efficiency in eflecting distribution of light from a source in accordance with the varications, but such fixtures are notadapted for use in any location where the appearance of the fixture is a material consideration. The reason for this is found in the fact that the conformation of a highly eliicient fixture is closely limited bypurely technical-requirements, and hence any material deviation -from the technically indicated outline, in

the interests of appearance, leads to a. marked loss in lighting efliciency.

From :this consideration itlappears that nosatisfactorily ornamental fixture can effect alone an efficient distribution of the light, and, hence, locations which require an ornamental fixture have lacked satisfactory lighting because of the low efficiency of such fixtures. 1 Y i It is the primary object of this invention toprovide a lighting fixture of ornamental appearance which will at the same time.ef-' feet highly eflicient light distribution.

Another object of the invention is the provision of an ornamental fixture of the type above described in which the choice of a wide variety of external forms is permitted without adverse effect upon the lighting eificiency.

Another object of the invention is the pro-- vision of a fixture of the type above described. in which a wide variety of technically efficient light distributing devices may be, incorporated in the same form of ornamental casing.

Another object of the invention is the provision of an ornamental light fixture casing which will assist the distribution of light by a technically satisfactory light fixture associated therewith.

Other objects of the invention will appear as this description progresses. I

A preferred form ofthe invention, adapt- FIXTURE 1932. Serial No. 602,932.

ed for-certain specific lighting requirements,

--is shown in the accompanying drawing ,;in

which: 7 7

Figure 1 is a side OlBYaiLlOH of the novel fixture having certain portions cut away to '55 show the structure thereof, and

'l igurei2 is a bottom planview thereof; v'The sourceof illumination may be any well known: means adapted for :the (purpose such as anielectric lamp, As shown,--it is* enclosed in a difl'using reflector of heavy, pressed prismatic glass 1 connected to the central support 2 by any suitable'means'such as hooks 3 from which, .preferably,it is removable forcleaning. 1

' The diffusing reflector shown is ofawell known type and ofaspecies-shaped particu larly for useonlow ceilings where thefix- .tures are to be spacedapart about two times the mounting height of the fixtures. It will be understoodthat the invention is not considered to be limit-ed to this specific form of diffusing reflector, but, for instance .in cases where the mounting height above the surface to be illuminated equals, or exceeds 175 the spacing of th'efixtures, a more conical form of diffusing reflector maybe substituted; In thisway the mosteflicient conformation ,of difl'using reflector or other light source "may be selected, attention being paid" only to the particular lighting requirements, and the appearance of the fixture being whollydisregarded. I

The fixture asishowni at 1 is designed to reflect a large part aoffthe illumination from the light source idownward ly in a conical beamand to throw adifl'used lightsidewardly and upwardly. Since such fixtures are purely utilitarian inpurpose, the ,fact that they are sometimes so constructedas to throw* spotty-shadows onthe ceiling-above them, 1s

-inot;important in the application for which they aredesigned, but would be-quite obj-ectionable in any iap'plication where the general artistic effect is a material consideration. The presentiin vention therefore contemplates an auxiliary casing for :such fixtures which will take full advantage of their downward glighting -efficiency,- leave unimpaired their.

idewerd; d fiusing :eifecjt, and ,remedythed a ficiencies in their upward lighting, at the same time providing an ornamental fixture,

the form of which may be varied to suit the general plan of the surroundings in which it is to be used.

1 Ihe casing here illustrated for accomplishing these purposes, comprises a plurality of angular uprights 4t surrounding the fixture 1 7 preferably of sand blasted or frosted glass,

which serve to conceal the fixture 1 as well as to assist the difiusion of the lateral light, therefrom. The lower edge ofeach panel 7 is received. in the groove'of one of the channeled members 5 while its upper end is held against inward movenient'by the diii'using "panel Ssupported on projectionst) secured to the upright member 4, as shown. I The entire casing fixture above described is so hung with respect to the fixture 1 that the lower edge of the said fixture will not aiiect the downward light thrown by the said fixture l,it being substantially. out of the downwardly reflected beam. 7

It is thus evident that the present invention provides a highly efiicient form of ornamental lighting fixture, comprising a light distributing fixture the form of which may be readily changed to secure maximum efficiency under the conditions of use without thought to its appearance, and an ornamental casing the form of which may be widely varied to conform with the artistic requirements'of the location in which the fixture is to be used,

without thought of its lighting efliciency per se, since it is designed to leave unafiected the primary direct and refiectedlight of the fixture 1, to leave substantially unaffected, except for a. slight enhancement, the secondary or lateral difiused illumination effected by said fixture, and to slightly vary the tertiary or upward diffused illumination provided by said'fixture for the purpose of remedying an inherent defect therein which would ordinarily make it undesirable for other than purely utilitarian purposes. At the same time a fixture has been provided having many desirable features of constructional simplicity and strength. 1

It has been emphasized herein that the various elements of the combination described above are capa'ble of widevariation, both for the purpose of securing various lighting efiectsand for the purpose of securing an 4 artistic eifect in harmony with the surroundings in, which the device is to be used, and it should therefore be understood that the scope of the invention is considered to be limited only by the following claims:

1. In a lighting fixture, a source of light, means associated therewith forgiving oii a diffused beam and a reflected beam, and a casing for said means having an aperture in the path of said reflected beam and difi'using means in the path of said'dift'used beam.

2. In a lighting fixture, a source of light, means associated therewith for giving off a reflected downward beam, an evenly diffused lateral beam, and an unevenly diffused upward beam, and a casing for said means hav ing an aperture in the path of said reflected beam, translucent material in the path of said evenly diffused beam, and a dii'l'using plate in the path of said unevenly diffused beam 3. In a lighting fixture, a source of light, a light distributing device associated therewith for projecting beams of difiering characteristics in different directions respectively, and an ornamental casing for said device having elements of different character in the path of each characteristically distinct beam lucent portion in the path of the diffused" light emanating from said hood and an aperture adapted to pass substantially all light reflected from said hood.

In witness whereof I have hereunto set my hand this twenty-eighth day of March,

REUBEN B. HALE,

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