US1545562A - Lighting fixture - Google Patents

Description

July 14, 1925.

J. L. JAFFE LIGHTING FIXTURE Filed July 10, 1923 INVENTOR. J '/7 L. fa e pfff/f 7 /e la M r Qy lq I8 l5 [7W ATTORNEYJ .fatentecl July 14, 1925..

PATENT OFFICE.

JOSEPH I.. JAFFE, or CLEVELAND, omo.

LIGHTING FIXTURE. y p

Application filed July 10,k 1923. Serial No. 650,628.

T all cc-zom it may concern:

Be it known that I, JosnrH L. JAFFE, a citizen of the United States, and a resident of Cleveland, county of Cuyahoga, and State of Ohio, have invented a new and useful Improvement in Lighting Fixtures, of which the li'ollowing is a specification, the principle of the invention being herein explained, and the best mode in which I have contemplated applying that principle so as to distinguish it from other inventions. j

The present improvements relating, as indicated, to lighting fixtures have more particular regard to the provision of a fixture for use with modern high powered incandescent lamp bulbs of the type now lgenerally employed for interior illumination of stores, offices, schools, factories and the like.

One object of the invention isto provide an improved form of globe and holder therefor, the latter being adapted for use interchangeably either with a ceiling collar or suspended support. A further object is the provision of a reflector of improved construction that will utilize the upward rays ordinarily lost through absorption in this type of'fixture. Still another object is the provision of means for Ventilating not only the fixture asa whole, but also such reflector so as Vto prevent tarnishinglor peeling of the latter under conditions of actual use.

To the accomplishment of the foregoing and related ends, the invention, then, consists of the means hereinafter fully described and particularlv pointed out in the claims, the kannexeddrawing and the following description setting forth in detail certain mechanism embodying the invention, such disclosed means constituting, however, but one of various mechanical forms in which the principle of the invention may be used. f

In said annexed drawing z j Fig. 1 is partly a side elevation and partly a central vertical section of a fixture embodying my present improvements, suchfixture being carried from a suspended support; Fig.2 is a similar 4view showing ythe upper portion of the fixture where arranged to be secured to a ceiling collar; Fig. 3 is a broken bottom plan view of therefiector that constitutes a feature of 'such lighting fixture; and'Figs. 4 `and 5 illustrate details of construction.`

The high powered incandescent lamp 1 is i mountedin a downwardly directed receptacle orsocket 2 of familiar type in the case ef both forms of construction thus shown in Figs. 1 and 2. The only differencev bctween the two forms of construction in question lies in the manner in which such socket 1s secured, i. e. in the one case to a pendent support 3 (Fig. 1), and in the other to a spider or ring` l that is adapted to be attached to thek ceiling in the usual way (Fig. 2). In the case of such pendent support an enclosing shell 5 of suitable form is provided which encloses the support 3 and the upper portion of the socket 2, such shell having `a depending flange through which project inwardly a series of set screws 6. While a shell 7 of somewhat different contour similarly encloses the mounting for the socket 2 in the case ofthe second construction, it likewise terminates in a downwardly directed flange provided with similar set screws 6.

The function of such set screws 6 is to engage with an upwardly projecting collar 8 of the holder 9 which is identical in both constructions, i. e. capable of use inter changeably with either ofthe supports just described. In order to insure uniform spacing all around, I may employ spacing bushings 6 in connection with such screws, as shownin detail in Fig. 4.-.

It will be noted that the diameter of the collar 8 is smaller than that of the downwardly depending flanges of shells 5 and 7 so that when the holder is secured in place by means of the screws 6, an annular space is left all around, thus permitting ventilation of the interior of the holder and globe 10 which is in turn attached to such holder by means of a series of set screws llin the lower depending Hangs 12 of the holder.v Secured permanently to the holder, so as to lie in spaced relation inwardly of such flange 12, is a series of spring clips 13, shown in detail in Fig. 5. The distance between the clips and flange is sufficient to permit of the ready insertion* of the outwardly curved or beaded upper edge of the shade or globe 10, as'clearly shown in Figs. 1 and 2, such edge forming a more or less tight closure with the intermediate portion of the holder.

Each clipV 13 is formedwith a circumferential, inwardly directed channel or groove 14 which is adapted to engage wlth the periphery of the annular reflector 15, the detail construction fof which lwill perhaps be best understood upon reference to Fig. 3'. Such reflector, in other words, comprises a sheet metal back 16 in the form of a plate of general annular shape. Theouter edge of such plate is curved inwardly to provide a flange 17 behind whichy the out'er edges of the segmental glass reflector parts 18 are adapted to be inserted and thus held in place, the inner ends of such reflector parts being then secured by means of hooklike'projections 19 stamped out of the metal composing the back 16 and adapted to be bent under such reflector parts when they are assembled on the bac-k. Another transversely disposed hook 19a projects between two adjacent reflector parts and serves as -a stop to prevent sliding movement of a'llsuch parts-around the back in which they are thus held. Damage to the silvering 'is in this way prevented; The segmental glass plates 18, which compose the reflector proper, are strictly plane so that the reflector surface provided islihewise plane throughout its entire annular extent'.l However, the back 16 in transverse cross-section is raised above the plane which the segmental glass plates 18 thus occupy -so as to provide an air space onthe-silvered 'sides of such plates. In addition snch back is provided at intervals with apertures 20 whereby complete ventilation of the space thus Vprovided between the glass reflector plates and the back is assured; f

, The .contour of the globe or bowl 10 is such that the rays-of light as reflected from the surface of the vglass reflector plates 18 will be diffused rather than concentrated. The material of the globe or bowl may also be selected to produce an additional diffused effect and to modify the tone of the light that is transmitted therethrough, but-by reason of the Shape and disposition of the reflector 15V a minimumA amount `of'plight will be lost through. absorption within the fiX- ture.

outer edgeo't the reflector back 16 and the upper edge or lip of the bowl, so that air may circulate freely between the globe and holder and escape `from or enterl the latter thro-ugh the annular space previously referred toas being provided between'the eollar 8 of such holder and thel downwardly depending flange of shell 5 or 7 the central opening in the reflector back 16 fits snugly around. v,the stein of thelight bulb 1, only sufficient clearance being left at this point to take Careof theslight variations thatoccur in the dia-meter of .such stem. Furthermore, the use of highly efiicient silvered` glass plates in the construction of the reflector 15 is'rendered' possible by' the form of the It will be noted that while an an-v nular 'clearance space is .left between the,

back 16 and the provision of the ventilating openings 20 in such back, whereby overheating and consequent blistering of the sil'vering on the plates is avoided.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent of such stated means bejemployed.

I therefore particularly point out and 'distinctly claim as'my inventionzl; In a lightingfixture, the combination with a suitable support including. a lamp socket vand a shell lenclosing saine, of a globe holder secured to said shell, a series of downwardly directed clips on said holder, and anr annular reflector peripherally attached to such cli-ps, said reflector comprising an annular plate having its outer edge recurved inwardly, a series of segmental glass refiector parts having their outer ends inserted behind such recurved edge, and hooklile projections adjacent the inner edge of said plate engaging the -inner ends of said reflector parts.

2. In a lighting fixture, the combination with a suitable support including a lalnp socket anda shell enclosing same, of a globe holder secured to said shell, a series of downwardly directed clips on said holder, andi an annular reflector periphera'lly attachedy to said clips, said reflectorV comprising an annular platehaving its outer edge recurved inwardly, a series of segmental glass reflector parts having their outer ends inserted-behind siich recurved edge, and hook-like projections adjacent the inner edge of said plate engaging the inner ends of said reflector parts, the portion of said plate' between its" edges being raised-'above the plane of said reflector parts: to provide a. Ventilating space.,` v

Inl a lighting fixture. the combination with a suitable support including` a lamp socket and: a shell enclosing same, of ay globe holder secured to said shell, a series of downwardly directed clips onv said holder, and an annular reflector peripherally attached to said clips, said reflector comprising an annular plate having its outer edge recurved inwardly, a series of segment-al glass reflector parts havingl theirouter .ends inserted b.ehind.such recnrve'd edge,- and hook-like .latin-g space .and apertures bei-ng vformed in such raised plate-portion. Signed -bv this-9th day of July, 19.231- .JQSEPH LJ JAFFE:

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