US1918484A - Lighting fixture - Google Patents

Description

July 18, 1933 s. R, NAYsMlTH 1,918,484

LIGHTING FIXTURE Filed MaIOh ll, 1950 force/air( e n 4177/ INVENTOR .Shirley R Na ysmz'lh ATTORNEY Patented July 18,`

SHIRLEY n. NAYSMITH', or CLEVELAND, orne, `,asaltaron rro 'anniii'unmm eoMP4NY, 0F MERIDEN, eonnnorlcur;.a'poonnonnmonoroeNNEcTrour' ,c

, The present invention relates toA lighting fixtures and is more ,particularly` directed to.- ward improvements in lighting fixtuizes em,-

ployinghigh power v.electric lmp bulbs lfor industrial illumination and Vwherein ,a glass diffuser is placed about 1the lightsource and .a large metal `reflectorouts-ide the diffuser a acts to Ireflect the light downwardly. Thev :present invention contemplates d 1mpro-v-ements in thetype .of fixture shownin ILS. PatentNo. 1,536,844 and more'par'f v`ticnla'rly, in designing the .fixture vso that it may employ a'totally enclosed glass diffuser tadapted to be threaded into a Vsupporting ring .carried Vby Vthe fixed parts.'y 'lhis threaded ring jand tthe neck Eof the globe or diffuser vare large enough to permit the yglobe or diffuser .to accommodate vthev bulbof ,the lamp,fand

.as these parts are at a ycomparatively large radius,` considerable turning .moment is brought about when the diffuser ,is loosened` To make thejdevice dust and yapor proof, itis. also preferably so arranged that `the' neokof thethreaded diifuser may be brought againstag'aslzet c, v 4Fixtures of this-.type are). usually mounted i inrathreaded fitter .or socketv cover made .of

\ a castingor of porcelain enameled sfeelythe reflector and diuser befng supported by `a `threaded neck usually made of copper and adaptedto be threaded into the fitter. j

"The present invention Acontemplates any an- -rangement Wherebyunthreading of the sup,-

porting neck `fro'mgt'he fitter is inot brought.-

about by the unthreading of the glass 4difi'luser in its support.` This may be accomplished by employinglgasket materials of different i coellicientof `friction and "surface'contact, so

thatthe glass can'beloosened from its "sups port with' less turning effort than isrequired to loosen the neck of the reflector support from the stationary fitter .orsocket cover.l

l AOther and further objects of the invention Willlappear 1as the description proceeds".`

The accompanying drawing` shows, for

' purposes of illustrating the invention, one

embodiment in which the invention may take form, together with modifications O fcertain parts, it being understood that thedrawing Applicare@ med namen "1i, 1.9.36. trmino, @mail L lfieotor yis `made in' the -form of a sheet metal madeof 'sheet'copper) of alp-size to fit inside is illustrative ofthe invention rather than limi-ting the same.

V .lnthe drawing: if'. ff i Figure lis an elevationalview ofone foi-m of lighting fixture; i V

` AFigure isa sectional `View of the upper part of thefixture 'on an enlarged lscaleja' 1 1-1'd I with parts in elevation-jy ,s

Figure 3 is a top plan View :of the reflector u thefline 3-3 .i

y"handed'threaded nutlQj threaded'on a stem 12` in the usual manner. The lower end. or skirtof the yfitter orsocketfcover "lOfis thread'- ed as .indicated at 13 and,`at'"thelowersedge,

has a bead 14. .y

The` reflector is indignada i5; This Arf;-f

porcelainlenameled reiiector haying windows or openings ladapted toallow light from atheilamp L .to pass upwardly; rThe" reflector stamping 15 i is here 'c show-n as being welded .to a stamping 17 las indicated at1'8: i This stamping.supports` -the'refiectorly It has ade pending flange indicated a-t"17 *and a lflat f inwardlyv extending portion 19 and .a short f p *This flange is -welded to la reducer 211 havingr a "fiati upper upwardly J bent flange 20,;

surface indicated at122.y Thevriefiector, stampf `ing and reducer 21fmay bena single stampfing, if Adesi-red." The "reducer is ^connected l .to ath-readed neck-orv ringv 2,3,(preferably the `threaded end of the socket cover.` n A gaske't 24, composed of material of high coeffi;

een# of .fristen-linee* afubbeo, eine posed between .thepiangeil and the platform l 1 3 .A sheet1 etalrlng or shell 25 `(made, for

example, ,of aluminum) :is-'secured to the Afiat j portion 19'of the stamping 17, being held 'in place by screws 26` threadedjintonuts 27. The downwardly flangedportion. of the .109`

glass bowl 30. A gasket 3l, inthe form of stamping is threaded, as indicated at 28,

to receive the threaded neck 29 of a diffusing a ringV of asbestos (having a low coefficienty of friction), is secured 1n place by prongs `on a ring 33. v

This' exam is i. sailed byaifeaailg al@ metal neck 23 of the adapter 17-21 into the `skirt-,ofthe socket cover so as to bringfthe downwardly directed light.l is either directly diffused light or light reflected from'thein-- side of the reflector'. A smallfamount of the light passing through the diffuser is transmitted'upwardly through the openingslfi.

` 'I claim:

The removal of the glass shadefrom'the yfixture is easily accomplished by merely unthreading vit.r vThe frictionv between the threaded glass part and the threaded shell 28 and asbestos ring 3l is much less than the friction betweenv the parts 22 and 14's inthe interposed rubber gasket 24. Hence, the latl ter namedfparts ydo-not separate or loosen when one loosens'theglass diffuser.v

n ln the'larger un1ts,instead yof employing the threaded connections l3-23,'it is possible f to support the metal parts directly `froma v socket cover; A fragment of' such a socket cover isindicated at l() in Figure 4. The lower edge of this socket cover may be welded to the flange 20, yas there indicated.

It is obvious that the inventionv may be kembodied in many forms and constructions within thescope ofthe claims, and I wish it to be understood that the particular forms shown arefbut two ofthe many forms. AvVarious modifications and chanfges `being possible, I'

do not otherwise limit myself in anyway with respect thereto.l f, ,l

y 1. A lighting unit comprising adownlwardly acting reflector, ag'support for/thel reflector, said support terminating, in a threadsocket cover threaded to the neck of the refiector support, a socket in the socket gcover, a lamp inthe socket, a ringhaving a depend ing threadedk fiangey secured to the reflector support, a diffusing glass vbowl threaded into the flange enclosing the lamp, a rubber gasket between'lthe neckand socket cover and an asbestos'ga'sket against which the glass bowl is brought when tightened yin place.

' 2. Ina lighting unit, a supportingv member inthe form of a threaded ring of porce- 'Y "gasket, l y y 4. A lighting-fixture comprising a vlamp ralenti;

lain enameled metal, athreaded neckthr'eaded l thereto, a gasket between the threaded parts, a depending threaded flange carried from than the neck, a glass globe threaded tothe flange, and a-'second"'gasket against .which the end of lthe globe is brought' when the globe is tightened in place, the areas of the Vparts in contact andthe coefficients offriction .between them being so lrelatedthat vthe first gasket offers more resistance thanV the secondwhereby the'glass globe may be removed without unthreading the other parts.

I 3.' A lightingfiXture comprising a lamp the neckand of substantially larger diameter areasofdifi'erent diameters, a gasket between vthe smaller" fiat area'and'ltheskirt,"av plate secured to the` outer fiat area and :having a vdepending threaded flange* aboveI andinside the ref1ecto-r,a gasket secured to the-under 'surface of the plate, and a glass bowl thread-f ed intol the flange and socket, a cover enclosingthe socket 'and having a skirt portion, aldownwardly yactingreflector', an annular support.forfthefreflector and having al neckpor'tion engaged' vwith* the against.. the vr'second k'j said skirt portion and a depending flange .i

portion-of a 4greater diameter'-than the said -neck portion connecting the rreflector,a light .diffusing bowl, an annular rbowl supporting member secured to the l'owerside off they re -fiector support and having afiange portion depending therefrom concentric-,ally inward jof the said depending fia'nge portion lofthe reflector support and engaged-with thejbo'wl,

and a lamp inthe' socket and enclosedbyth bowl, said reflector having-Y a plurality of llight openings spaced about the y'outer -side of the-said depending flange portion ofthe `reflector supportandl substantially infthe plane of the lower edge. ofthe said bowlsupp'orting flange portion forvan upward trans- 'mission of` light diffused bythe Abowl., ed neck made of copper, a porcelain enameled 5. The light fixture as set forthin claiinl,

wherein the neck portion of thel reflector sup,- y portis 4in screwthreaded,connection with' the and thelight diffusing bowl is in ,similar con-v skirtportion of the vcover for thelamp socket, I

nection with ytjhedepending flange portion of i the bowl supportingniemberg ,i

6. The light fixture as set forth inclaiin 4l,

ta'chably secured vto the'reflector support.

`wherein the 'bowl supporting member'is de-

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