claim: 1. An automobile headlight coiaiprising a source of lio;ht, a series of concentrically arranged annul,,'tr reflectors ,tdapted to reflect in stibstantial p,,tr,,illelisrn intercepted lo light rays eman,,ttino, at v,,iriotis angles froiii said source, said reflectors bein- of progressively diminishing diimeters fi-om the rear to the front of said headlight and each being respectively clisposed at different @ingles i5 with respect to s,,iid sotirce of light tnd the front reflector being in advince of said li(rht and the rear reflector bein- behind said light 2. @Nn automobile headlio-ht comdi,isincr ,i 20 source of li-ht a sei-ies of concentrically arranged annular reflectors ada,pted to reflect in subst,,tntial parallelism intercepted li-lit rays emanating at various ano-les frorn @:qi(I source, said reilectors beinly of pl@o (rressii,-ely 25 climinishina dia,m frc@m the r -eters eqr to the front of E, id headlight and each being re.spectively disposed at different an-les with re-spect to said source of lio-lit, the front reflector bein- in tdvance of siid liglit and t' 3o the rear reflector being beliind said liglit and thearrangenient and size of s,,iid i,c,flectors being siieh that direct rtys caiiiiot be pi,ojected by said so-Lirce to points intermedi,,tte the front and re,,tr reflectors -without being reflected forward by one of said 35 i-eflectors. 3. An automobile hea.dlight comprising a soiii@ce o-f lio-ht ,i series of ann-Lilar reflectors of prouressii,ely diminishing diimeters ari,angectin okerltppin-- relation ivitli respect 40 to each ot@her so till'it no direct r,,tys from tlio sotii-ce of liglit can p,,tss between adj,,icent reflectors -withoiit being i,efleeted tbereby, the front reflector being disposed in tclvince of s,,Iid source of light Ind thp, 45 reir reflector being disposed behind the reai-most point of said source of light and s-,iid reflectors each extendino@ rearwtrdl a, distance less th,,tn th,,tt of th@ next adjacent reflectoi- to the, rear thereo@f. 50 4. A heacllight comprising a series of eoncentrically clisposed a nul,,tr reflectors, a soiirce of lio-ht comprisin- an electric lio-bt biilb, disposed axi,,tlly -wiCIiin sucli seriest'of reflectors, the outermost reflector being in 55 front of said light biilb ,Ind thp, rear refleetor being to the rear of saicl liglit bulb and said reflectors, -when vieived from the front, having the outer edge of etch stiecessive reflector from rear to front slightly over- 60 lti)pino- the innei- edge of the next rearzn wti@dly adjaeent reflector. I@LEXANDER S. LIMPERT.

UNITED STATES PATENT OFFICE. ALEXANDER S. LIXFERT, OF PITTSBURGH, PENNSYLVANIA. IE[EADLIGHT. 1,421,506. Specificatioii of Letters Ilatent. Patented Jtily 4,:1922. Application filed J'aly 17, To alltchoinitmay coiieern: Be it known that 1, ALEXA-,NDER S. LiLiiPER,T, a citizen of the Uiiited St,,ites, i-esidiii(y at Pittsburoh, in the county of Alleghen-v and State of Pennsyli-ania, have iiii,ente@l new and useful Improvements in a Headlight,, of which the follo",ing is a specification. This invention relates to improvements in 10 automobile headlio-hts and has for its partictilar object the prodiiction of a simple, durable and economical headlio-ht thai is capable of reflecting r,,iys from the source of li,o-ht forw,,trd to a maximum distance but 15 with a minimum amount of glare, -,ill as .hereinafter -'Lully described. It is highl@, desirable in II-,-hts of this character @nd parti6iiIaT.'Iv in automobile lights that the lioht ravs be directed upon 20 the ro,,tcl in front o-E the machine f or a considerable clistanee witbout producln,- a bright glare, wl-iieh is conf iisino- to the drii,-@i@ of an ,tpproacbiiig ma(@hine, and to redli(@e or obviate this o-lai-e as mtich as possible, it tha' the li u 25 is desirable t gh' ravs be projected in substantial parallelism below the horizontal plane of the driver's eyes of an approacliin maebine. This means, of course, that tee rays emanating from ihe light shotild 30 iiot be.permitted to project above the plane of the light itself. It has heretofore been proposed to secure this result by the employment of p-,tr,,tbolic reflector@, wl-iieh are designed theoretically 35 tO refleet and project the r,,tys emanating from the rays of lioht in parallel paths. With such a reflector, a large proportion of the reflected rays will be projectecl in p,,trallelism, but the direct or corona rays from 40 the source of liuht will emtinate in diverging paths, prod@icino- a direct -1,,ire outside the path of the reflected r,,tys, and this direct glare is further intedsified in cc-rtain spots bv the rays reflected from the substantiilly 45 fl:,@t portion of the reflector near its center. The primary object of my present inventi6n is to provide a li(rht of the el-iaracter indicated, in which the objection,,tble dii-ect glare will be 'entirely eliminated, and from 50 which all of the liv@ht i-ays will bo projected in substantial pai,,,Lllelism in the desired direction without diiT-Lision or dispersion outside the desired path or planes of projection. Another object of my invention is to pro55 vide a headlight whiel-i -will throw a strong, clear and concentrated ligl-it so as to ade1920. Serial No. 396,895. quately illuminate the road ahead, but -",bich will not produce an objectiontble II.-lai,e and iv, ill not blind or confuse the driver of an approaching car. 60 A ftirther object is to pt-odtice a I-ieadlio-ht iii wliieh the soiirce of lio-lit is adj@ista@13r inounted so that the reflected i-,tys projected from the headlio-ht m,,ty be properly foi2used by adjustment of- the position of the source 65 of light relatively to tlle i-eflectin(y stli-faces. Still another object is to provicle a headlight -",hich ivill be strong Lnd durable in construction, one which can be manufactilred at a reasonable cost, and one ivhich will liot 70 be subject to displacement of tlle parts, and wliieli will iiot be easily brolten or injlired. Other objects and many of the atte'ndant ad-vantages of this invention -will be readily ,tppreciated as the same becomes better 75 understood by reference to the following description -wlien considered in coiinection with the accompanyino, drawings. Re,@ferring to t@e drawings: Fi(Y. I is a side view partially iii trans- 80 verse section f a he,,tdlight embodying my invention; Fi-. 2 is a face view thereof with the we@tt-hei- glass removed to more clearly show the arran-ement of the reflectors; 85 Fi(y 3 is a perspective view of the headt-@ I liglit, certain parts being shown in section; and Ficy. 4 is a fra,-menta,ry diagr,,tmmatic view"'showiiig a sli,-htly moclified form of 90 mv invention. 'Referring now to the drt@vings more in detail, reference character 5 indicates zenerallv the frame oi@ baelc of the headl@ght., this frame being customarily made of sheet 95 metal -tnd provided -with 'a circumferential flange 6, terminating in a bead 7, shaped to cooper,,tte -with suit,,ible means (not showii) for holding the weather glass or lens 8 in position. A disc 9 fitted within the frame 100 siibstantiallv at the base of the flano,,e 6 serves to sirengthen the structure, and at the same time, Iffords a support for the nipple 11, in ivliich the lamp soelcet 12 is carried. This socket is connected -with the io5 wires 13 in the usual manner, -whicli extend rearwardly through the frame, wliich is equipped with th6 usual protective sleeve or tliimble 14. In order that the lamp 15, -which i.s of lio usual construction for detaebable connectiq)-i -with the socket 12, may be adjusted toward

!-2 1,421,506 or fror-q the frame r) for the p-Lirl)ose o-l-' i'@octisi-Eig tlie 'bho soeli:el@ 12 is aJ,)Iy coiinee'ued ivilli the !I. -While I , t . - , i y 1 , ) r e f e r i - e d m e t h o d o f c o ! - l i - J e C t ' 0 1 ' 1 M @ l . @ T b e titilized, --, liaa-e sho-@i,-Li iii the pres@iiu@ iiistaiice the ii'p-j-)Ie 11 as equi-,)i)e,-l wit4h aii iiicli-,-).ed slot 16, throu a lu,,- @iscrew, 17 secui@ecl to the - -,:)rojects. turj,iiiq o7 n-.tovement of tl-i-, socket, it i-s 10. illstoj iii)iar(-Tly or oi-itw,@,rdly -@-ith res-,)ect Lo the D-I,,)ple ard when tho recl L)..isite jlistment h-,tc beeii seciii,ecl, Lhe soclc.-t is lockecl lit t@Ljusted. positi-,)ii bv n-ieans ok' o, set screw 18. It shoiilcl be T-ioted @-it thi's 15 poiiat that the cli.se 9. ii-istea(-l o'l p-fes-Inti,-ig bright s-Lirface 'i@ t refqe'-' t4lag properties, is inert., a-Licl iT-i th@- ,)re@erilel-11 coiiQ-triietion of n-iy is so that Tio li-ght is ref-'iectect 20 Tla,,, ref-lect'oti o the ii 1 @ht fro-m the source oT- l,i. ht 1,5, so 161-iaL, '@-Iliese 9 r,,tys ",ill be projected ',-rom ti-ie ii-i the des'red I I.-aralleli.sm, is ---ffeo-ted b@, -L set.@ies c-L' 25 'LrustocoTiic,,,,l reflee'Lors 1-9,, -t,7ringecl coi-Lcenlrically ivith respect to ti-ie bg@se, @.nd disposecl in spgce@i fro, 'II -fro)lt to rear of the light, tl-ie b(,iii-,r from reai,@ to front of cl, iy)-iiii30 islij.,.Icr cliameters, so thai', ps iiill be al@,pa,rent from the clrtwip@gs, 'fie re:Rector is dispose,-l at \vbile the smallest is disposeci in fi,o@it. These @-efleetors are moiinted Lipor. sii@t,,ible siip,,,)or'@-s 21, 35 preferably three in iiiimber. to -wl-i.icli 4u-hey are securely I,ttaclieO. bv sol-i@;@riiig or other-wise, to forpi 9, sLibst,,i@tiil "11)"l ,@gid s-lbri-icture. Pref oribly, the stit)l)orts I-) I -,re sl.otied to-accomni-odF,te the c(l@@es of -@,'Tie i-eI 40 flectors. t-Iiiis ftd(--Iin t I ,g to the o-r ti-tstrlicture, ancl the assembl(@d eotistri-iction @s then seeiirecl to the Cils- 9 iT-i ,-Lny s@iit-,tble manner so t-,h,,tt it @),ill be re",Piped in i-)osition coticentricallv AA,.Itl-i tb.e 1-@.imp, aiio, - will 45 b(, hetd (-I;sl)jtce-raen@u oi@ r,,ittliiig when in -Lise. It will be observed fro-m !"Ig. I tl-i@it tl-ie reflectors ,irr-,tnoed in overl,- pl)ii.i.g re1,,ition so that -wb.eii vie-vecl '@r-m tlio i-@-isicle, 50 the inner ec'toe of eie'b siieccssive reflector fi-om re,,ir to front sliglltl-7 tl-ie oliter e(-Ige of the -Tiext 9,cljicent reflector, ap-cl )-vben vie,-vecl fi-oTD- ti-io fi-o-nt, the oiiter edge of o,,ich siiecessive - r-lil,.,ctor 55 froTD rear to front sli!,@i-itly ove--rl,,tps the i-Tiner eclge of the @.iext re,,)r-",,i.rcily adlae,ent reflector. With this constrijeti-on, it -will be Tnltnifest th,)t the li@b.t ra7s em,,tiiating ' o-,n th Lr @e 60 source of li ,ght are all inte,-cepted bv tle reflectors so th-it no li,,)-lit excel,)t oii ,i, ., short ,tre directly in front of the lam-p is permitted to escape unreflecteci between aijacent reflectors. It will ,tlso be obser,,c-cl 65 that each siiecessive reflector I-rom rear to froiit is set at a more acute an,,),le with resl)ect to a ti-,,tnsverse plane parallel with the (@'Llse 9, these aii(,Ies bein- such tha-t the rays @vbei@ reflee'Led are all pro'ected forwardly I i-i-i s-LTbstantiLil parallel piths, as illustratecl 70 iii 1. --.4ri-irthermoi-e. it will be observecl that as 7e,9,ectoi-s approacii the froiit of tlie @ii,e clisl)os-,d progressively iie,,irel, in order to preellidp, dire(,.t 75 e--,-ri,,ination of ravs betavecn so that the coroiil i@ays beretofoi-e iiientioiiecl ,ire ciit off ,iiici re-Rected. I'liese refle,-tors may, if desii@ed, ],)e co-ntintled pi-,tet-'-c,,@T]v to the froiit oi' the. !,imp, ,t close il:),,,)i-oach to siieh ar80 i-aii-e-nient bein-- sl-io-wii in Fig. 4, b-Lit sinee the cii.re-,t ra.),s iii front o-t@ the soi-irce of li@"lit eiiianite -.ubstantitlly 'n tl,,e, desired Av;tl-ioiit i-eflect;o-,n, the emDI.oviiieiit si-iiall reflee- 8,5 o:C a n-Li-TnL-er ef these i,ery toi,@,, cloes iiot justify the expense, Lnd in therefore, to preeliicle the (ri@l@re ru,,tiltg :Crom the i@L-,vs @vhlch ire not ilitereeptecl ',)y r(-,ft,--etors .t,@,@oss ,t are at the f-ront )f tltc 1,,),inp@ T prefer to san(lblast or other- 90 i@Tise i,oii@beii the front of the t,,Iass 8 (@Ter this irei,, " ijidic@ite,-l by reference el-iaractei-)O. TI)is rotiiienec.1 area i),ill obvia'L(, glprG,, qiid l'oi@ -,il.1 I-),i-aet,ical pill1)oscs, is stibsti,,iitiallv a@s effectii-e ,incl coii- 95 siclertl)ly cl@e,,,,per t,11,1,n the employineyit of ni-iml)er of closely set re@clectors of ,,-ei@.v si-.I-iall cliilmeters. S;nee the of the -15-oi-cls, tlic@ disc 9 is inert, it will be inani- loo @-eF-,t that no r,,iys of light strike the reflectors tl@iose eiii.aiiatin(y directly from the Oi" I.iqllt. (-',onse7qtiently, the location ii lmowii c j u,iis sotirce be ig and the source . il t i'sol-" bein,,(,y capable of adjtistment as pre106 ex,,)Ialned, each is intercepted ,leciir,-teiv i-eflected in the desired direetioji, ,,,ncl. no 1-ti@xitii,e i-a),s, such as are in p,,ir-,ibolic.. reflectors as t@he result clotible refl(,ction, a-re prodileecl in my 110 cojistruction, tnd coiiseqliently, no ri,-%@s ,irc,, delivered iTi. an undesirable direeIioii, !)tit etch rav i-S aceLirLtely projecte@ in the Oi_iloction that it shotild travel. Should Iiimii be positio-Tied too f ar fcrwal-dly, 115 the li@,,ht r,,tys ANill be projected in diverging i,,,tths. -,tnd shoulcl it be too far reirwardly, the r@,,.ys ivill be projected in convei-ging pf,,ths ,vhich Avill Liltimately cross and then di-A,ero-e, but by means of the Ldjustment 120 L7' p,-@ovicled, the 1,,imp can be accui-,ttely positi.oned so that all of the ravs will be proIeeted in stibstantial paralletism and in the I cles'recl direction. T@@ is believed that my initentioii, one mode 125 of its constri-iction, and many of its inhei-- eii' advanta,ges will be iiiiderstood and a - p 1-.),-eciated from tb-e foregoin- without fur@@,ier clesci-iption, but it should b43 manifest ihat the structural details iJIustrated and 130 or in cther

1,421,506 described are capable of consider,,tble modification, withotit departing from the essence of the invention as defired in the follo'",ing claims. I