claim: 1. In combination, a pencil having two rel,,itively iotatable parts, screnv ineans cooperating with boibh of said parts: and f@daptecl to ble advanced axially of the pencil in i,ea5 SpoliSe to relative ro'L-Ittion of s,,ticl pai,ts to adjust a lead, ,t lead carrier movable axially through one of said parts, and 11 sprin tlireaded connection betweer-, the callrier al-i@ said screw means, subst,,tntially as described. G,9 2. A pencil having in combination' 'Uwo relatively rotatable parts,,,tiid a screw mellins adap'ted to be moved axially in response to op at o carrier associate, ei i n thereof , a lead W. ith the screw mealns having a spring c,5 threadp-d connection there*ith, and means for lirnitino,@ the movemenus of the lead, carrier whei.-eby it iiiay move with the screw mea ns or remain stationary relative thereto, subst antiallv as clescribed. 3. A pencil in Nvhich is con-ibined t-wo rela- 70 tivel y rotatable parts, screw means cissociated with said I)ar'Ls and adapted for movePient loiigi-ttidiiiall'y of tU, pencil, ,tncl a le"t(I carri er also movable lono,,itudinally within the p6neil and open at botli ends throuo-li one '5 of which the s-,rew iiiea-,is is entered, ifie lead carri er being adapted to i,eceive a leid when intro clueed tliei-einto through either encl, substinti -,lly as clescribed. 4. A pencil in which is combined two rela- 80 tivel y rotatable plarts, a lead carrier open tt both ends iieciprocible witlai-,q the peiieil and adap ted to receive t leacl tlierein iihen introd uced tlirotigh ei-,,her encl thereof, and scre w me,,tiis removably conD-ec4.-ed with the 85 carri er and in cooperation with the relatively rotatable T)arts adai)ted to be reciprocated in respons.- to opertti-on thereof, stibstan'lially as described. 5 . A-pencil in which is combined two rel' 30 ative ly rotatal)le pti,ts, a leld cai-rier reciproca ble axially of the pencil, scre,,v means also re6ipron, ble ivithin the pencil and cooper atinc, witli the relati-vely rotatable 1)arts @Ll hereof 'so as to be actuated in response to 95 oper atioii thereof, mea.ns providing t frictiona l threadecl connection between 'Llhe sci,ew mea ds aiid the carrier, and means for limitinly th,e carrier reciproettions tlirouoh a dista@i ce less 'Uhaii the movement ran(YC of said ILIO scre w means, substantially as described. 6. A pencil con-iprising a body portion and a 'Lip ortion, a tub-Lil,,tr member i,ioidly c-,trp ried by said tip portion, a lead car-rier within I said tubular ineniber, a propeller motintecl 105 to rotate wit@b said bocly portion threacled into @aid tubi-ilar member and threadecl ii-ito said I lead c.@rrier, and means for Iiinitin(y the Ionaitu'dinal movement of said carrier wiuhiii said tLT . bula I r member. 110 7. @ A peiicil coml)risino, ,t body portion ind a tip@ porL-lion,,a tiiblilar member ri(,idly c,,tri@ied. by saicl tip portion. t lead (@,.)rrier withsaid tubtilar member spriii(y,inenil-)ers oii said lead cari-iei-, a ptopeller m, olintocl to ro- 115 tate with: said bocly rtioii, said propeller P Q 5 havii)o, threacliiiz connection wi@.h said ttibula r member and tlire,@tdecl ilito s,,iid sprinn membersi on said lead c,,trrier, and meaiis foi120 imiting the longitudin,,tl movemeiit of saicl carrier within said tubular member. 8. A peiicil haviiig a body and an operatiii unit frictionally and telescopically con9 nected thereto, a lead carrier h,,tving spring1 2 5 nieans at its upper end movable axially within the pencil, ,t propeller movable axialtrrier and connected fri lv through the c, ct'oiially and se-parably tl-iereto by said spring me,,tns to move the carrier therewith for a

@6@t!6ii diily @of it@ trh@61 ana@'fn'e':in's f6r ililitin6@ the'inovem''e'nt 6'f tne cgrri@,r@ 9 @A p6neil h@iriii@y @ bod@ @fia @ii -Lini-t frictiona!IT@i@d te-16scopioall.@ cone c r er mou@te (I th6r6to,- @ lead' 'a'ri d @ for Iiinited @xial move@m-eD-,t witl-iin th6. i@-d havino@- s priniy means at op@o@if@ 6i@d@, 0 'V ne @e'nd of . @hic@ is l@ro-@ide@l --with screw tl-iroa:Os aild ith.;e 6ther bnd f or- m'e'd@ luo @r@ eceive a le,,td, @@yid a pi-6@'elle@ h'alt Ing a screwthreacted @ i@@ictional -co@n@nectioll 'Witli, fl@6 se@ew-th@e,,tded @diid 'of th6 CLr@i6@@ tho @i6@.poller beii@6- - ad@.pt6d t6 n-iove ,t@ le'ad b6ih with and relati-Ile to the 'e,@rrier. 10. A peiicil hii-@iiio,- @ bod@ @iid aii ope@at-. ,in& iiiiit fri6tiondlly@'and said; tiv t '-'m;p ilected ther6to, @op,@r@ e Lini @ co rising a@ iub-Lil,@@ ie,,id carrier @ i 'n the form -of a I ey, 'e op'-@e'n at b6th 6nd@ thT6u6-h eit'h'e't o 'en 8'e p -d- a@,pr'O20 end of whicli @ 166d m,@Ly be inserte pell'ei- m'-ovable thtouo-1) tho carrier, nieans foriiiiii'6, @ fpictioiiai c6ii'ne-'etion b6t'we'en o'n"e end onhe@@c,,trri6r' @iid ,L lead ancl mean-s foripino- a screw-threaded spririg coniiediion CIE 2,) betive-6-n tli6' th6t -ei-id d the prop11. In a - ei'icil haviri@2: a bod@ and a tip p friet'ioii@ll@ @iicl telese6@ically 66iii@6 d the@et6 a tiibe@ carri6d by the tip @nd extend.in@2 within- the bocly, apr6pelle'r h@ving S-lidii-L@6-,- h@on-tottittible connection wiih' the b6dy aiici throhded:iiito said tube a, tublilalr I 0,,i d carr'i6@,- 16'6-ely inount 'ed for - li'm'ited a:@ial 6-i6v'em6nt withiii said tube anci ha'viiig a screw-tlir6,aded: res,ilient c'oni@ection with s,@iid pr6i)eller, aiici means for fricnall@ gripping a le'ad within s@icl c@drWlie- 6b,r @ le'Ad i)@ay. b6 ad-@aiid6d or ret.@,ict6d @ thr6-dgb- tlie@ tip V@ the carr@ier' an@d adjusted rel.ativ',e@ to the chi@rier by a re, a 40 ti@,e rotation of @tlibe b6ocly.,,i'nd tip. 12. A poheil, having i'n c@offibiii@ti'O'n bocly, a@tip thet6fo@ coii@iect6d t]@6rew'itli for eac gripping rotE@ti-oi@ relati@i@ '@her6to I' I ]@.iean8 16b@'Ol@ iiioliiited'in @did tip fo@ I"I'M4,5 ited slidiny inovernent- means@ cooper@:ting with both the'b6dy'a-nd t,@'p- 'a"nd re6i@iroc@table the@,ethro-Ligh on' rotdtion of the"tip reIAtive to the body, said n@o@tns ha'v'l'ng a s'erewthreadod t -e@ilieht, cohne6tion With said leiid -v lo-rippinu ine - s to@ atl ot retto@6t: the 50 O;ln ance samo al@ci to a,-cljtist the iel'ative to s'aid @ o ri p pi n g m e an s u p o n: c o nt in ti e dr ot at io ii s ai d @ ti p r el at iv e' io - s ai d b o d y. JOHN P. LYNN

Patented Aug. 4, 1931 1 8 1 7 , 0 1 @ l UNITED STATES PATENT OFFICE, J'OHN P. LYNN, OF CHICAGO, ILLINOIS, ASSIONOP. TO DUR-0- LITE RENCIL COM:?A-I.IY, OF CHICAGO, ILLINOIS, A CORPORATION OF !LLINOIS PENCIL Application filed March 1.12, 1928. Serial )No. 263,665. This invention relates to t pencil liavii@(,f niechanileal Means for propell.ing, i-epelling, ,or (,xpelling a le@, -id throiigh its tip portion. The @necha-,iism em@loyed is of the screw.5 operated @type ac@tuated by roteuion of one part relitive to ai@other The pri-neipal (Dbjects realized -by this inare siir@plicity in constriieti6n and operation, expulsion of the lead following @the . exhalistion of its serviceable portion; and protectioii to, the 6perating parts aoaiiist ")Ccident or tamperii-iz incident t6 usag@. In .accoraplishing@ these purposes, I asso,- iate *itl-t a'pei.Leil body part a separable operat1.'3 lng part or unit --foriiiing, by preference, the tip of the pencil. In response to r6lative rotation betweerl the b6dy pal-t aT--.id this oper,,@tin g@ pirt or unit, a carrier which clilitches a, lead may be, I)ropelled longitudinally in one direction or the other, '@etnveen Rxed stops, to exf I 6nd 4Dr r@trac@ the lead tlirough the tip of the pencil. Within the rano-e re-. quired for tl-iis li,-nited feed of the lead, the pencil operation is substantially frictionless, s the carrier ,tnd le,-) d are @ propelled as a unit@ if it is desired liowever to extend the le,td tlirou@,li the pencil tip to a greater extent than is permitted by the Iiinited moveli'lent 6f the c,,ti@]@@er,-coiitinLi6d relative rota,el-,) iion 6f the parts ivill eft-ect an adjustment of @he:l-@@d r6litive 'uo the carri--rl wliieh acljustinelat will be.'a'u-tained b@ t clis'Llinet increlse iii @resistance to@ ro'uation of the p,-rts. In tddition' to @ the -,ibqve P cullarities of ope eratio,n, I so construct the carrier that the lead to be cl@i@ched thereby may be introduded thereiiito from either of @ two opposite ends, i. e., that is through the tip end of @the pelicil or through the end of the operatinly unit which is op@osite ihereto. These and other objects of my inv4@ntioii will inore clearly hereinafter ppear in the 4 specificatioii '@ and claim@, tlkeni in conjunetion with the accom anyin drANvings which P 9 iliList@at6 a suo@ estive' embodiment of -the @g present iiivehtion iii the rnaniaer foll6wing: Figure 1 is a lon@@itudintl'section taken centrally through the pencil, a portion centrally of its length beidg broken a-@vay to condense the vilew, and the lead carrier being sliowii in its extreme upper position; 2 is a siiiiilar view of the lower penFio@ cil 'end with the lead carrier advancecl to its loiverm6st position. Fi-o,. 3 is a e 6.5 siniilar vi w witli the propeller t, advaileed 'throtigli the cariier so as to expel a lead,from the pencilFig. 4 is ' v a detail in ele atioii of the pencil head i,vith a i)ortion broken away to e X- co :hibit the parts in section; P, ig. 5 is a detail in elevation of the lower eiicl 6f.;the lead carrier, showin in seefion the correspondiii(-y eiid of the -surrounding tube; Fi -. 6 is' a transvers6 section taken on liiie 6--6 of Fio,. 1; and Fig. 7 is a vie,w in eleva,tion of the 16ad carrier per se. Inthopi,eseilt eiicill.combine.sepo@rably:-- P with a body part A a relatively rotatable part such as the tip B. The body is provi,ded with a slotted axial boi@e 8 throut@lh whi6h rnay slide non-rotatably a screw ineans such as a screw -tl-ireaded @ropeller 9 7@- havin a head 10 at 6ne ejid tliereol. This @ 9 bore in tli(@, body extends upwai-dly from i'Lls lower end,for,a distaiiee sufficient,to ,tccoinmodate the pro@eller tliroughotit it s ontii-c raiio.-e of mo-vement. In its lowlei- j.-eo,,ion 8( tile b6re iiiay be sliglitly widened to I accoinmod,,tte a bushing 11 wherein is received the, en.larged end or head 12 of a fube 13 whicli n e p to pi-esent its extends d6wn witlii th ti lower eiid@ against a stop Ishotilcler 14 a@l- S5 jadent the 16wer end thereof. The Wal'Is of the tip ar6 profei-ably tapered, as showli, except at the up@ei@ eiid 15 where tll6y exteiid cylindrically to loosely surrouiid the a,djaceilt end of the body. The tube 13 niay be stipported fixedly withiii he tip as by t means of a @ing plate 16 which is frictionally 'fitted between the c@lilldrical walls of the tip. It is prefei-red that the ttibe liead 12@ be g,, slitted loiigitudinalty at l@ t6 provi,de sprin 9 sections 18 which are nord-ially bowed outwarclly to provide a desired cleo,@ee of frictioii auainst the bushing 11. TI-ie tip in which this tube is secured ma the y n be con- 10(

nected separably with the pencil body with which it rem-.Lins assembled by the tension olitwardly exerted b,y the sections 18 against tlae b-Lishing in whi@li the same is received. At the ui)i)er elid of the tlibe, I provide a coiistrict@(t n@eek 19 havh-@'- internal- threads 20 wit'l@ which the screw threcuds @of the pr6peller 9 may cooperate. At its lower eiid Ih eller is red-Liced in diameter in the 10 fo P- p@9 -a i)iii 2 iin oT Motinte(f for lii-iiited recipro-,at" ion' Within the tube 13 is a lead carrier in the form, 6f a sleeve 22 the upper and lower ends 23 and 24 respectivel@y, of wli-icli- 'ar6 Of @rediiially ,it 15 duced cliaiii@ter and slitted longitli Be@t--@V6eii ihe end', of the d to-.b@,'--.ri.l)-@ecl tt-ir6,u@9t,he tip 2,0 of the pencil in response to@ c6,Tres@,oiiding moveilients@,of'th@6'c'a;'rrie@r'. TI -ie@.walls@oT"the fi@p -ar6.@thickened a;t its'lo'w'eT,@e,kt-r@mity and bored to PIovide a; Which aliii@ 'th6 - I-ead a:@ia;l@ly *ith tl-ie- car25 ThiW 's'prt.ng se;cta' o-iis at tli@e upp er, eii:cl rier. of the lead carr'rer a;re@. iht,ernally thre''ded @thT @to C60porate-- with @the' 6ads@ 6f the pro9 witli whi;ch. t4,ey eii a-o@6 with ap9 z, 'ti6n t6 provicle a sprin--@t-hr@ CTa@blia@ fti(, ad-pre 30 ed connection. The reduced 16wer eiid, of the 'i@ad-, ca'rrie:'r ig"re@el-v@ble vitl-.ii:n, a;ii ' annu r space 2 o 1 6 f rni6d " @t@ti6T!')T Of- the tip bel@w @h@@stop'sliout-cl@,e@r i4:- I pP6- vide'8t6ps, however for limiting the re6i@@6cafloii:sF of 35 t;h6@ 16@ad@ c@r@'ri'e'r @vithiiithe@@ ti@b6- 13, @sothat v@iitold f,r6iii en-,-,,a d'@biiiditowith the p@@t@- pr6xiti@te For' this purpose th'e tube m@y be ptoviaed with an- inwatd'i@ pioj@@@tiii(r be'ad 27 which is disposed' within an 616iig@ted re@6ss 281''ext@-iidin& f6r a p@.6det6r'm'in'e'd distan@'e ic)f the 16irgti@- of 'the sloe@e. At- o@p6@iie' 6n-4s of this ro,@,ess6d f,@ ciii's@@ 6 rri'er 'are forp6@tion o a ' ].a-ed stop 45 shoulclei's 29@, witlii whicla@ thu b@@4@ 21 may @lf6riiately en,gage wlioii the leq@cl' carrie'r -is re,cip@6c,qt6,d. -13p' operati6ii thi@' peifeil ine-cli"@ni@m p-e@brm@sfts@. fbll'@ows@: Rot@d-on @6f the p,6@icil @50 body relativ6 tb 'its tip will prlodiiee a Ion-it@idinal t@avel@ of the ro@ell6k which 'al,;.4o Pi@ rotated rela@ive to the opei-atiii@, Linit e., the tip.!@ th6teby causin& th@e pin- 9,1 to advanc6 ili @ lead C'through- the pen6il. The 55 c@Lr@ier wfilet-i is in f'ricti-6na'l@ thieaded cOnn:ection wiih@' t-he@ @@@opell'er tends to ro@ate t@h'e"r6;Withs'o 'a@ to ad@,@t'nee Or@retract witiji-n e- -limli@'d6ie'r@iined b he st-ops th sp@6ed 2.9., B.eyond these limits, howe-@er, tho. car60 rier @caniiot -inove, so th@f@ fii@.ihe@ I r6t@tion of pr6p6il@r.@ c'o-niin-Lies with tl,-,e,@ e-ftrrier remainin@ st@f 'jonary aiid@ offerina aii @appreciable. @fr'16tion; . Th-e lea@d in@@ be int@6duced@ii.-ito the;carm 65,ri'er fro eitKe'r of@ its t en S., in1,817,011 serted throuoh the tip of the peiicil, the lead -%,V@ill be -@ipped by the spr,ing sections a -iay bo at the f6rw,,trd end thereof., ncL ii plished back therein approximately to the distance Nihich is represented in -Fiig. 1. 70 Froiii the up,periaost,,position @h'owii in this fi(,ure the catrie@ adva)ices r6t'ati-vely with the propeller bet-vveeii the two stops 29. Hereiii@fter tl-iis , riotioii is referred to as -it@b@ -n6ce's ry tb 75 fricti6iiless. - Wli6n 6coiyi6g s a idvalIC6 the lead f Li@the@''liowever; the propeller is moved f ornv@ird aoain, but rotatively -F. th 'opped by relative to e carrier wliieti is s,u ti-ie7. r shouldi@r 29. The retraction of the Llppp s lead into the, tube a sufficient, di tance 80 f-6r, !Dr6te6tio@ n iii@y - b6 @ broii(iht ab6 Li-t by a fri6t'i6rile-s's@ rever'se oi)ere@ti-on. In stl,c,h a li@nited relr@ictive MOVeii-ient,. the@' 6@prier -ftav-els r6tatively with the prope-11,6r thus offeri'no, ii6 f'rictior @tTi6@6to-. COi@@er@61y, 85 -",hen the lead is t6 be@,,,teL-@a-need one , e iiiore to po@iti-Oli fo@@Li@se@ the 6arti6i adifwn@ces with ttie iii a,'fri:ction,'.'6ss iiianner up to tiie: point ,,Iiat -th@e :Lipper s@t6p sholild@er 29 FO this go i@ eii-o-aged. r (@@sual p-,ii6il - Lise, rhln(ye of' f@.ictioiiless liaovament is@ alll,, b6 requir6d@ It is possible alE@6@ t6' load th@ op6r@,tiii-- zn uliit of tl. i6 p6n6if @Wi@tli a@ fiesr load by introcl-@iciii& it tl-ie.ei."nto fr6iii th'o'uppe'r en,(I. 95 @Thia'is ,tecoiaiplii5hed @fftev'r'oiiiovljio@ the tip f@lo th'e peii@il aiicl - witl@d@'@a,\V, tl-ie prop6'iier- tl@er6f@0M.@ Th6ieaft-6r 'WIi6n the 1:)rop@ll"er is iii@6rted' ii:@td 6pe@- 6t-ive p6sitioi-i the 'l,e@d Nvill be;,'in'o'@,ed for- IOC tire,gib the opp-o@ite -eiids;o @ve,-v@iii @e p-re-- -WDTD tli@6uo,h the elltrrle-r @t e t5 - ' t.,ion, of its spring- se&uioiis@ at tlie@ f6rw'ard encl, thie;r66f. . The- present, pencil m@@; a@ts6 be characterized by certain othe'4r fea-tu@es -Wliieh ire 10@ ilr-Listr,,tce@d in Fi -0@s. 1. and' 1;.., -I I-lave shov,,n the up.l)er pencil. end cl@ambeved' @a8 a@t 80 to pi-ovide a magazi I ne f6r, extr'a,-Ie'aet'g. TI-ie el suro f6t this i-iitiga@iiie iiie@@ coi-i@ist of a mtiltipl'e jawed- i6taine@ 3'1 ca@rriiiig an ei-aser 32,, the i@6tainer being s@ipid6"rl@ecl withi a@fe'@rtil633;ivhlcil,exten@Ys-d6wr,:o'vertli.e @gides of the p6n-cil' adj@pei@t its,Lipp6r ei@d. e o t i t e r a e e d suffi6iently@to ,vccoin ffu8h@ rel'eL,i.6n witli the reip-ainder of the@ boclv-.. The fkirrlile@ is detachab-ly fitted to,th-e peileil end,so ),S to mit@: access to th6 le'adi ch@riaber ' tliereNi,@ithin. The:connection which I,Prefer for holdiiio@ l@ the. ferrule in pla6e- is iR the: foriii@: of an ,inOented @6rnainent 34 which preselits on- the inside of the ferrule a, blitton adaptea. to ' eng,@tge @ With a thread @@ which'is.@6@r@ed spitally around the surf,ice@ of@ the b'o4y@. . Th-e: fe'--r'rule .na'37 be .- rot@tivery- ad@@iie6cl, t-0 a Posi 0 o res'Ll agplinst -an@ annuf,a,@ sh6iild@r 30 u 'n the b6dy. It'inay al'so. be un's'6'@'ew'ed f -or withdrawal@ f@oM' th@@ b-64y.- aii in is of@eta-

1,817,011 tion the eraser held thereby is also reinoved therewith. Preferably 9, cap 37 is applied over the eraser and frictionally eiig.-tg--d with the -Lipper end of the ferrule 33. The 5 provision of an ornan-ient,,il inrlentatioii 34@, as suo--Yested in Fig. 4, may serve the clo-Lible capacity of a button for coor)eratino- with the threacls 35 to establish coiinecti-ork between the ferrule and body, and of a dis1( tinguishinu symbol or mgrk by wliiell the pencil is i4entified as the product of a pai-ticul@r manufaettirer. A button would ordinarily be objectionable because of its marrin.g the extei-nal appearance of the peiicil head, but by producing the button iiT'Iluh an ornaniental configuration which does not inip,,.ir it@ utility, it is possible to combine into this element two I attributes having useful --Ftuletions. 20 The construction of pencil head just describ-,d is particularly advaiitageous where the.body is a moulded bakelite or celluloid product. Such a material although Ni,ell adapted for a pencil body, tends to shrinlc 25 from its oriainal size, or else it caniiot be formecl uniformly to an exact size. In si-icli eircumstaiices, the pencil head will fail to stay in place satisfactorily if a friction-il connection be depended upon. This diffi30 culty is on,ercome in the present peiicil ivhere uhe head may, if necess,,try, be loosely fitted in place, since the button in engagemeiit -with the thread provides a connection - ,vliieh is positive and unf ailiiig. This is of par35 ticul,,tr advanta@ge when, as i-@i the present pencil, tl-ie cap is frictionally secured to @uhe ferrule beca-Lise it is then necessiry to a ply a pulliiio, force to reinove the ctp preptrtto,,ry to @sino, the eraser. When as in@ pre40 vious practrce, the ferrule is attached to the body by ,t frictional coniiection, the chaiiees are abotit equal of ptillina off the entire head, i. e., the ferrule, c@ip, aEd eraser, when only the cap is desired. But by hav45 ino- for the cap a frictioilal connection and for ihe ferrlile a positive connection each 1 requiring a different motion for its disest@ib.Shment, it is possible to remove the entire head or just the cap, ,tccording is is desired. 50 1