US1562347A - Lighting fixture - Google Patents

Description

' Nov. 17, 1925.

LIGHTING FIXTURE Filed Feb. 28. 1924 INVENTOR. 76am: L raso/v Patented Nov. 17, 1925,

UNITED s -Tfaifes IS'AAC LIBSON, OF BROOKLYN, NEW' YORK, ASSIGNOR T0 SUNLIGHT REFLECTOR lGO., INC., OF BROOKLYN, NEW YORK, A CORPORATION OF YORK.

LIGHTING rixrnnnf f Application filed February 28, `1924. Serial No. 625,791.

To all y'whom t may concern.: n j h y Be it known that I, IsAAc LnssoN, a citi-v zen of the United States of America, resid# ing in the city ofnNeW York, borough of Brooklyn, inthe county of Kings and State of New' York, have invented certain n eW and. useful Improvements in Lighting Fixtures, of which the followingis a specification.

andjparticularly to a fixture. for 'display WindenT illumination-and the like.: The object lof my vinvent-louis to providea fixture of rugged and serviceable construction which affords suitable distribution and corr centiation of the light rays.

In the accompanying drawing I have il-j lustrated in broken side elevation a fixture in which my invention is embodied in one form.

The present invention relates to fixtures of the general type used for the illumination of shovs7 Windows and the like. Thepresent fixture is designed to afford notonly a general diffusion of the light from the fixtui'e lamp, but also a spot-light concentration of portion of the light rays upon some particular object in the Windovs7 to Which it is desired to attract particular attention.

The fixture is preferably adapted for adjustable installation, and for this purpose is mounted upon an adjustable bracket V1 adapted te be clamped upon a suitable support, and having an associated arm 2 adjustably connected to the bracket 1 so that the fixture body is in effect mounted for universal adjustment with respect to the support. Clamping nuts, such as that indicated at 3, serve to hold the bracket elements in adjusted position.

The body of the fixture comprises a bell shaped canopy 4, to which the bracket arm 2 is attached and to the head of which is secured a lamp socket 5 of conventional type Which opens into the bell 4. At the mouth of the bell is secured the reflector.

The reflector comprises a frusto conical shell 6 faced on its inner surface by glass reflector facets 7 This portion of the reflector affords a light dispersing area, and insures the relatively Wide dispersion of the light rays for the general illumination of the show Window. Associated with the shell 6 is a second frusto conical reflector shell 8,

they inclination or pitch of n/'liich With.y re? speoty to the axisA of the fitting is* muchl greater.

Glasssreflector facets 9. also line the inner face of Vtlii'ssl'iell and serve to concentrate fthe light Arays reflected therefrom, and form inieffect fa' spot-light,reflector.y

Nitli'fixtuies ofthe present type, itis customary' to use vgas-'filled tungsten lamps as' thedight source.'V ,The -filaments k10,of lamp ofthis 'character fare'- located substam tially centrally inthe bulbous portion/,11 of the'rlamp 'which is l"connected bya long neck .12to the lampvubase, (not shownlto which insure loiigevity.VA For'v this Apurpose the can? opy bell 4 is provided with ventilation apertures 14. These areso located With respect to the lamp filament 10, that the direct light fromthe latter isintercepted by the reflector shell 8, so that no spotty escape of light therethrough into the show Window is possible. While the bulbous portion of the lamp, and consequently the filament, is located close to the spot light reflector area 8 9, sufficient space is afforded between the lamp and the central aperture 15 in the `reflector 8 to properly ventilate the lamp.

f The V structural details of the fitting may be varied. I have shown, however, a simple and economical construction and assembly flange extends sufficiently `beyond the facets 'y i to afford means also for supporting a diffusion glass or color screen (not shown), should it be desired to color or diffuse the light emitted. The opposite margin of theshell 6 is cut to afford a series .of tongues18,

' some of which may be readily bent over the opposite ends of the facets to retain the laty ter in position.

The shell 8 of the reflector is provided at lits central aperture 15 with an in-turned flange 19 which engages at one end the facets 9. The other margin of this shell overlaps and is soldered to the shell 6 beyond the tongues 18, and certain of the latter are bent into engagement with the opposite ends Vof the facets 9.

rIhe reflector shells 6 and 8 may be soldered together before the facets 7 and 9 are placed in` position and the facets thereafter secured by turning down the lugs 18 in opposite directions upon the adjacent ends of the facets as, the latter are assembled upon the two reflector shells.

The reflector thus assembled may then be secured to the canopy bell 4l, the mouth of Whichis of sufficient diameter to embrace the reflector shell 8 and to sleeve over the shell 6. It is only necessary to insert the reflector into the mouth of the belland offset the margin 20 of the bell to firmly secure 'the parts together. The joint is also preferably soldered for additional security.

The `:construction illustrated affords an economical fixture, the metal parts of which :may be formed from sheet metal and asw "senibled quickly and strongly. The illumiknation afforded by the compound reflector secures a highly ,desirable diffusion and concentration particularly valuable for shovv Windowrlighting.

Various modifications in detail Will readily occur to those dealing with the problem, which do not depart from what I claim as my invention.

I claim- A lighting liXture comprising a canopy bell, va `lamp socket arranged at one end of the bell and projecting therefrom and adapted to support a lamp Within the bell, in combination With a reflector mounted at the mouth of the bell and comprising a frusto conical diffusion area arranged in eX-y tension of the annularfvvall of the canopy bell, and a central lfrusto conical spot-light area of greater pitch embraced Within the canopy bell but spaced therefrom, the deviati'onvof said spot-light area of the reflector from the Wall of the canopy bell progressively increasing toWard the axis of the fix# ture, said. spot-light area beingl centrally apertured to accommodate the neck of an electric lamp inserted therethrough and through the canopy bell into the socket supported at the head lof the latter, together with a universally adjustable supportingY bracket secured to the canopy bell lin the area between the socket and the reflector.

In testimony whereof I have signed my nameto this specification. I A l I U ISAAC LIBS'ON.

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