US1668789A - Lighting fixture - Google Patents

Description

May 8, 1928.

w. s YMMEs E1' Ax.

LIGHTING FIXTURE med Jane 9,. 192s Patented May `8, 1928.

. c 1,668,789 UNITED 'STATES PATENT OFFICE:

WHITEANsYMMEs, GEoBGE 1I. `111115111111; AND mineras F. mivAL, or SAN FRAN# cisco, cALIronNIA, s sIGNoRsro momias DAY comPANnorsANFRANCISCO. CALIFORNIA, IIl conromrronor enLIFoaNIA.

` LIGHTING mx'runn;

Y Application mea :une 9,1936.` lsei-1111110'. 114,859;

Our invention relates tointcriorlighting fixtures of thetype employing translucent shades, and is particularly applicable to fixtures which arepend'ant from the ccilinf. An object of our invention'is to provlce a lighting 'fixture in `which a screen is used" for preventingthe source of light from be; ing seen thru the open end ofthe shade".

Another object of our invention is to Sprovide a lighting fixture in which the means for `supporting the screen does not cast objectionable shadows;`

Another object of our invention is to provide a lighting fixture in which the screen r will permit light reieoted by the shade to pass thru theopen'end of the shade.

A further object of our invention-fis to provide a lighting fixture in which the shade and the ceiling are directly illuminated.

The invention possesses other -advantageous features, some ofwhichwith the for going, will `beset forth at length in the following description where we `sha-ll outline in full that form of the lightingfixture of our inventionv which we have selected for illustration in the drawing accompanying and forming part `of the present specifica` tion. In said drawing we have shown one form of lighting fixture embodying our invention but itis to be understood that' We do not limit ourselves to such form since the invention as set forth in theclaims may be embodied in a plurality of forms.

In the drawing:

The figure shows a `lighting finiture em" bodying our invention, the left half being in section and the Vright half being in elevation with a portion of' the shade removed from the frame. i i 4 Various features `of the lighting fixture ot our invention which are lshown inthe accompanying drawilig, but which are not claimed hfereimare claimed in our co-pending application entitled C-handelier, Serial No.f114,688, filed June i), 19:26.

Broadly speaking, our invention comprises a lighting fixture havinga shade with an y `open end and which lis provided with a screen to shield `the source of light from View thru the open end, the screenV being so supported that the shadow of the support falls on an opaque portion of the shade. Our lighting fixture is preferably hung the ceiling by means of a chain 4 vwhich is suitably fastened thereto'and which is embellished `at its pointfot'` attachmentyto the ceiling by `an ornament 6. At the lower end of thechain 4 a tube 7` is fastened and carries at its lower end an electric socket 8 of 'the standard type. An electric globe 9V is screwed into the socketl and is supplied with electricity.` by means `of wires (not shown) `which `depend from the ceiling and may be intertwined with the chain 4.-

. t `A-suitableshade 11, preferably `of translu-` cent materialand generally either of parchment or silk is provided vfor :the electric `globe 9 and is reinforced at its edges by being mounted upon suitable stiff hoops or wire rims 12 `and .13` spaced by bars 14.

The shapeof the shade can be of any ofthe usual formsandin the present `instance `is approximately a circular cylinder. very desirable to make the shade fdetaelb able from the `remainder of the lighting fix ture so that the fixture can first be installed andproperly positioned and then the corn-` paratively` delicate shade can be puton. It is also `sometimes a requisite that the shade be easily removable for cleaning or renewal. To afford the translucent shade 11 a firm support and yet render it readily removable from the balance of the fixture, radial arms 16 are provided which are suitably fastened at their outerrends to the top rim 13. The arms A16 `extendradially toward the light globe 9 and then are bent to lie parallel with the tube 7; The upper ends of' the arms `16 are then bent back to form hooks. A suitably apertured disc 1T is mounted be tween jam nuts 18 and 19 suitably engaging the lower threaded ena of uw uib@ 7. The| hooked ends of the arms 16 are hooked into the aperturesin the disc 17, and may read- Vily be removed therefrom ,by liftingthe en tire 4shade 111. Byvsuitnbly. adjusting the jamwnutswlS and.19. the disc 17 may he n'ioved axially of the tube 7 to adjust the position of the shade 11 with respect to the light globe 9.

In orderto prevent the hooked ends of the radial arms 16 from accidentally becoming disengaged from the disc 17, means are rovided forretaining them firmly in place. Ihese means preferably comprise a hood or ornamental husk 21 which is slidably mount- It #is of a collar 22 provided with' a? set screw which may be engaged with the tube' 7.' By

sliding the collar 22 into close engagement with the hood 21 and subsequentlytigliteiiu ing the set screw, the entireassemblymay be held in quite rigid relationship, but is easily disassembled by loosening the collar and sliding the hood 21 upwardly .on the tube. thereby.releasing the hooked ends ot" the arms 16.

Means are provided tor :preventing the source` of light from being visible Jfrom bclow the lighting fixture and preferably comprise a non-transparent screen 23. The screen 23 is usually in the form of a disc or plate which may be translucent or Vquite opaque whichever is best adapted to the particular conditions adecting the lighting fixture. rl`he contour of the screen should be similar to the shape of the shade. In the present instance thescreen is a circular disc of glass having an irregular surface. The disc or plate 23 is supported by a. ring 24 made ot a suitable metal angle which in turn rests on dependingr hangers 26. The ring 24 and the hangers 26 are preferably joined at their points ot' Contact as by soldering or brazing to form a unitary structure. The upper ends of the hangers 26 are bent over to form hooks which engage the radial arms 16. The hooks preferably fit loosely over the radial arms so that the entire screen structure, including the hangers 26 and the ,ring 24, may be lifted slight ly, rot-ated and then dropped to remove it from the remainder of the lighting fixture.

It is desired that light rays may be4 reflected from the interior of the shade and pass out of the lower end ot' the fixture. This is preferably accomplished by spacing the screen 23 an appreciable amount above the bottom of the shade therebyallowing ample room for the reflected light rays to leave the lower end ot the sha-de. A vtypical reflected light ray is indicated bythe broken line A in the drawing.

It is also desired to position the supporting ring 24e for the screen 23 in such a manner that the shadow which it casts will not fall upon the shade 11 and be objectionably apparent. The supporting ring 24 and the hangers 26 which hold4 it in place are preferably so proportioned with respect. to the vsize of the plate 23 that the opaque ring 24 and the" edge of the plate 23 are substantially in alinement with the lower opaque rim -12 of the shade andthesource of light 27.` The Y are in perfect alinement with the source of,

light. No objectionable shadows are then cast on the shade bythe ring I24 supporting the screen which renders the source ot light invisible from below the fixture.` The light rays emanating from the source of light tall directly upon the shade 11, directly upon the ceiling and upon the screen 23.

An even illumination is produced without objectionable shadows on the shade.

lVeclaim: Y T

1. A lighting` fixture .comprising a source of light.v a. substantially cylindrical shade surrounding said source of light, an opaque rim on said shade, a screen for rendering saidfsource of light-invisible thru an open end of said shade, and anopaque rimon said screen, said second-named rim casting a shadow substantially entirely on said firstnamed rim. I

2..V A lighting fixture comprising a source otlight, a shade surrounding said source of' light and having an openportion, an opaque rim around saidropen portion, a screen for rendering said source of light invisible thru said open portion,jand an opaque portion on said screen, the shadow ot said opaque portion being cast substantially entirely on said rim.

3. A lighting fixture comprising a source of light, a substantially cylindrical shade coaxial with said source of light. an opaque rim around the bottom of said shade, a nontransparent circular plate coaxial witltsaid shade and spaced above the bottom of said shade so that the edge of said plate is in alinement with said rim and said source of light.

In testimony whereof, we have hereunto set our hands.

VHITMAN SYMMES. GEORGE H. HARMAN. CHARLES F. DUVAL.

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