claim: 1. A chair having I seat, a spindle for SLIPPOrtillcr said seat, aild pivoted ab6-Lit a p,,iir of ax@s thereto, meins permiiting saicl seat to be tilted fcrwardly from a central portion abo-Lit oiie of said'pivots only, ancl ineaus for pei-mittino, said seat to be tilted re,,irwarclly aboiit the other of' said pivots only2. A chair liaviiii(y a seat, a spindle for siiji- 110 porting said seat, and [)ivoted about a p,,iir of axes tbereto, mea,ns permitti said seat 119 to be@ tilte'd forwardly from- a central portion aboiit one of sa-id, pivots only, meaii . s for permitting siid seat to be tilted rear-, ilo iiardly about the other of s,,iid pivots only, and sprii@g means for normally holding s,.iid seat in siibst,,intiallv horizontal p6sition. 3. A eb.air ;Iroll comprising a support, t 0 ni-mber pivoted t6 said suppol-t, ineans f r-,o iii,(Yiii(y q,,ii(-l raember in one direction to its limi,t of pi@votal M'ot-io-n,, a T)air of spider ,trms eac:l-i pivoted to@ ,3,,iidmember, and me,@iis urging said @rms to@ the limits of their pivotal motion in'the opposite'direc@- @125 tioli. 4. A chair iron com rising p a. spre,,ider@ t ineinber pivoted to said sDre,,iderl;a,nd:se@tatt,ftehin- spiller arms eae'h pivoted to s,,i'd member.

5. A cliair iron @compi@isii,,(y a spreadei-, a iiien-iber pivoted to said spreader on one axis I and seat @-,ttacliing spider arrias each p;-votec't to sdid meniber on anot@lier axis. 6 6. A ebaii- iro@i coiaiprisin-- a support, a U sbaped plate liavin(Y its s,.cle arms embracing aiid pivoted to s,,).id suppoi-c, iiieans ur(Yin- the I)ase of said plate ao-ains'Ll, the rear face of said support, a pair of aiigle: bar 10 spider arms, elicli liiitiiig it@ horizo-.itally disposed fl,,inge overlyino,, saicl, side arins ,ind suppoi-t, a-nd its vei-tical flance doini-i wardly extended otitivardly of its adjacent sicle ai -n-i aii(-.1 pivoted thereto, lugs depejid15 lug from each. vertical flanoe rearivai,dly of + rear face of E -is for @,,,e ;aid base, and meai urgiiia said Iiigs against said base. 7. A chair iron c6mprisiiig a support co-.qsisting of a U sliaped inember havilig its '20 sides upwardly extenclino,, ancl an iiiverted U shaped member having-its arms extend' embr bet-ween and acecl by caid sicles, sai@ sicles extending above said invertecl n-iember, ,,i normally horizontally disposed U shat)ed 2;3 plate htving its sicle arms enibracino- @aid side,s aiid pivotecl thereto adj,,icen I t their lower forward ed-es , a bolt passed tl-irou(yll the base portion -of said liorizontal pla I t I e, the head of said b6lt bearinff @-Lc_raiiist tlio :iu rear f,,tee t,liereof, a, forward equ,,tlizing pl,,tte bridging said sides and througli which saicl bolt passes, a thumb nut tlireaded on the forward end of said bolt, a spring sui-rounding said bolt and bearing between said bar aiid 35 nut and ur-in- said base portion .iuainst the rear edges of said sicles, and meai@s' ctrried by said horizontally disposed U sliaped plate for sti,,)porting a chair -seat. 8. A chair iron comprising a support con40 sistino, of a U shiped inember havina its l@, sides -tipwardly extendinf,, and an invertecl U shaped member having its arms extendin- bet"ween and embraced by s,,tid sides, id ides extending above s,,,.id .@as inverted .4 member, a normally horizontally disposed U sliaped plate having its sicle arms embracing s@tid sides and pivoted thereto ,idjacent their lower forward edees, a. bolt passe@d throug-h the base portion 6f said 1-ior50 izontal plate, the he,,tcl of said bolt beai-in(y LI i 'or r ,tgain@st t-he rear face thereo.' , -L Vl Id eqtializing plate bridging s@id sides ,ti-id tbroup@h whicli said bolt passes a thtimb nut I threaded on the forword encl of said bolt, a .1)5 SDriny surrounding said bolt and beai@ing b'etwe'en saicl bar and nut and uro-ino- said base portion against the rear ed(ye-s of saici sides, spider arms eacli pivoted z@ to to s,,tid side arms aicl overlyiii.u the u-,oper eclcres thereof, said edges bei-,i,; sliaped to liermit a limited motion of said s,Didei, arm's, and spring m aiis for ui ? e @o-in(y saic --,)ider ari-ils to one limit of their l@i'vo@,ql riotion. 9. A chair iron comprisin a stipport 9 1,678)668 sides upwardly extending, and an inverted U sha ed inember.havin(r its ariiis exteijd-'Lti,-, p between and embraced by said sides, said sides exteiiding abo@e said 'inverted niember, te Ila n horizontally disposed U shaped i g its side arms ei-iib@acino, said side-s 1 and pivoted thereto a I diacenc tli6ir lower forward edges, a bolt passed tlii-ou(,Yh the b@ise portion of said horizontal plate, the liead of said @bolt, bearin(r a,"ainst the reir 75 face thereof,, a forwardequaliziii(y plat(@ b clgin "id sicles and througli -,vlilch said g s' bolt T a' a :thumb nut thi-eaded on,the '@ses or I w@r -ro d en@ of said bolt a spring sui und ilig said bolt and bearing between said bai- 80 and ntit and urg-ino, said base Portion aoai st 6 the rear edges ofsaid sides, angle spild'6r arliis each having one flaiige ovei-lying tl-ie uppei- eclges of said sides and side arms, and the other flan(,e depending outwardly of 85 said side arms tnd pivoted thereto, the upper edges of said side arms being beveled invvar dly to permit the seat of a @hair supp6rted by said spider arms to tilt forwardly, lugs ext6iiding downwardly from said spider 90 aril'isi and a spring for urgin said lugs a (yai.nst said blise portion. 9 10. A chair iron comprising a support li,,tving upwardly extending sides a U shaped pl,,tte hlving its side arms pivoted to said 95 sides and its base enoageable with one edco of , each of saicl sides, a forward equaliz7er bar bridging the opposite edges of said sides, a fornvard bolt passing throu(rh said base plate and equalizer bar, a thumb nut thread- 100 ecl on said bolt for-wardly of sa.id equali@5er bar, i compression spring reai3ting b6tween said b,,ir and nut, a pair of spider arms each having a downwardly extendincy flan(ye pivotecl to one of said side arms and haviiig a 105 dependi ng lug ada,pted to contact with the --ear face of said base, a, rear equalizer bar bearing on the rear portions of said lugs, a rear bolt passing through said ba,-ze plate aD.d rear equalizer bar, a rear thumb nut on 110 the rear end of said bolt, and a spring bearing between said re,@ir tliumb . nut and said rear eqiializer bar; 11. A chair iron comprisi.ng a support havincy -Lipwardly extending sides, a U shaped 115 0 plate havincr its side arms pivoted t said sides and it@ base engageable with one edge o-f each 0-' -L said sides, a forwa@d equalizer bar bridgino, the opposite edges of said sides, a forwai-d bolt passing @hrotigh said 120 base plate and equalizer bar, a th-Limb iiut threade d on said bolt forwardly of said equalize r bar, a coiiipression sprino, reactin betivee n sa-id bar and nut, a pair of spider, arms each having a downwardly extendino, 125 flaiicre pivoted to one of said side arms and c having i depending lug adapted to conta t witli the rear face of said base, a rear eqiial-. izer bar bearing on the rear portions of said consisting of a U shaped meiilbe@ liavinff@its lugs, a rear bolt passing through said base 130

4 1,678,(368 plate and i-ear equalizer bar,,a rear ti-iumb @aid pivotal connections, ancl rearwardly iiut on the rear end of said bolt, a spring frolia said mid position aboilt the more rebearing between said rear thurnb n-ut ancl inote piv6tal connection, aiid means for 20 said rear equalizer bar, an inwardly extelid- yieldiiigly holding said seat in said rnid po,5 ing luo, on each of said side arrns adapted to . sition. contact with the adjacent side plate to lirnit the i-earward tiltina of said spider arms, said side arms e,,tch Ravin(y its top edge rear'Vvardly of sai(i spidei- arin pivot bovelecl to 10 form stops against whicli s,,iid spider ,trms bear to limit t,he forward tiltiiag of said spider ,trms. 12. A chair having a seat, a support for said seat having a pair of pivotil connec15 tions with said seat at difl'erent d'sttnees therefron-i s,,tid se,,tt beiiig tilted foiwardly from a mid position about the nearer 6f 13. A chair iron com rising seat supportp iiag spider ai-rns pivoted about oiie axis, means to limit the tilting of said ,Lr@iiis about 25 said axis in one -direction, said arn-is being pivoted about another axis, illeans to limit@@ tli6 tiltiny of said arms about said otlier axis in the opposite directio,,i, aiid spi-ings fci@ urging said arn-is to thei-r limit6d posi- 30 tions in botli directions abolit said axes. In testliiiony whereof I have affixed iuy sigiiature. DAVID R. COLI.,IEA R.

Patented July 31, 1928. l@678 668 UNITED STATES PATENT @OFFICE. DAVID R. COLLIER, OF GARDNER, XASSACHUSETTS, ASSIGNOR TO COL . LIFR-IKFYWORTH COX:PANY, OF GARD2TER, -MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS. TILTING CHAIR. Application filed June 2, 1923. Serial No. 642,900. This invention relates to tiltin - cha,i,, s ,tncl i." vides a. construction by wh pro ch the clilair ma.y be tilted forwardly as well as backwa,rdly froin a,n intermediate, @ norm@il substaiiti@lly horizo@ntal position. The back of the chair is so constrlicted tha-t when the se@at is tilted for-wa.rdly it forms a, firm baek 9[itly foi-wa,rdly i[nelined, a.nd Sli-1pport,@ sli when@ in its norma@l horizontal or brekward10 ly tilted position it also functions properly as a baek rest. A novel mechanism for adjustiiig t-he, height of t4e Clair is also prov.ided. VA or a. more complete understanding cf this. 16 iiivention together with furtber obj@e-ts and advantageous details and combiiiations of part,s, refere,,nce ma,y be had to tlie accompanyinom drawings in which io-Li7e 1 is a, central vertical section F'- 20 throtioh t,he chair. 2 is, I an end elevation of the ebair iron a-nd relatecl parts. Fi.gtires 3 a,nd 4 are. dptailed se.ctions on lines 3-3 and 4-4, respectively, of Ficure 2. 25 Fioure 5 is a, top, pla.n of the iron. Figure 6 is a side elevation of tl@ie iron and ,related parts. R(,ferring to Figure 1, I iiidicates a, el -Lair base which is shown of the conventio-nal -'10 t3,pe having le-s 2 provided with, castors 3 at their outer,onds,,ind having a central perforation as at 4 to ree ive the chair spindle 5. A -,-iiita-ble soeket is formed to receive t,his spindle, this socket ccmprising a sleeve 35 6 in whicli the spindle is slidably and rctatably mo-Linted sleeve being soated within ,L. bushing7 which is held in position by a. IoNver cla@mpin plate 8 ma.d6 fast to the 9 lower face, of the ba@se 1. . Near its upper 40 eiid tl-ie sleeie 6 is prdvided with an outiirar(ily extedding annul,,tr bead 9 and 4@ngaging ovei- this bead is a, curved anniilar portion 10'of a, i-etaining pldte, or cap 11 A -vhich is made,fast to the upper @f ace of the base 'L. 45 This port-io,n 10 is upwardly extended and turned oiitw:ikdly to fo rm a, flange 12.: The upp--r end of the, sleeve 6 m,,tv ,ilso be, turnecl out.w,qrdly as@ at 13 overlying this flanoe and seated thereon mav be a wagl-ier 14. The 50 spindle 5 is threadecl for a portiqn o,f its len-o-th. as showl at 15, and in engageinelit 'with these thread's is a. nut@16. @Fixed to this ntit is dome shftped shell,l@ wliieh encloses the nut and hides the flan.ge 19, from 55 vie-w. The, spindle mty be retained in the sleeve 6 by meaiis of a. screw 18 passinu at througli a,@ opening 19 in t,lle sliell so th '@ its hea.d is accessible fron-i above the, Same, It being thi,ea e rou a lug 20 extending downwa ly from the nut 16 and being qo adapted to pass beneatl-i tlie flalnge 12. By relativ e turning 1-notion of the spindle and the nut 16 it is evident tha-t the chai r iiiay be raised or lowered a-s desired. Iii order to lock the. chair against, %,ertical adjust- 65 ment while permittin, it to, turn abolit its - ,pindle as an axis, means is pro@vided for lockin g t,be nut from turnino, relat,ive to the sl:)indl e. This may be ac@compjislied@ b y iyieins of a plate 21 having a hole, through 70 wh".e h the, spindle passes and havinff a lug engagi ng in a. keyway 29, cut i.ongitudinally iii the,spindle. This pla,te has a.finger 23 struck downw,,irdly therefrom Nvhich'@ inay enter a, perfor-,ttion 24 in the shell. Engage- 75 ment of this finger within the shell opening act,s to prevent rotation o,f the nut relativ'e to the spindle. The@ p,late 21 is preferably forrne d witl4 a fin-er piece 25 by whiel'i it ma-y be raised to remove the fing,er 23 fron-i 80 the opening 24 so als to permit the hei!,@ht of the cha-ir to be 'adjusted bv tiirning the ntit 16 relative to the spind le. Th e upper end of the 'spi.ndle is of rediiced diamet er as shown at 30 ind -Dasses througb 85 a spreader or support comprisiii- L U-shaped memb er 31 havino- upwardly extending sides 32. An inverted U-sbaped member @3 has its arms 34. extendino, bet-ween ai-id eiiibraced bv the sides 32 to form a, substa,ntially box 90 shape d meinber, the upper end of ihe s indle p passi.ng through the member 33 and-beiiig he,,td6 d over a@1350 thereabove. A horizont,,Llly disposed U -,baped plate 35 has side arms 36 ernlbraciiio, the sides 32 and these 95 side arms are pivoted on @a rod 37 extondin 9 tlirough the sides 32 and also ough the irms 34 of the inierted member 33. Tjile base, portion 38 of thp, member, 35 is adaptecl to be'broii,2@ht up aaainst@tlio, rea,@ edzes of loo the sides 32 which-,ire extencled abov-e the inverted U-sha,ped member, these,. edgos forming steps to limit its pivotal inotioil i-n one direction. Its motion is limited in :the other direction by means of lugs 39 ext 105 ing inwa,rdly from the port@ions 36 which strike on su@faces 40 it the opposite edges of tb.e side,-z 32. The base 38 is Tiormally held in such posit-ion against the sides 32 b,y a spring 42. This spring surround's a lio

2 1,678,668 bolt 43 which extends i-earwa,rdly thi@ough the base 38, its lie7a,d 44 enga-in-, the forzn @n ward face tliereof , the spriiio, beariiig a.gainst ,,,in equalizei- bar 45 through which the bolt 43 passes aiid whose ends are formed a,s V sil,,tped truniiions 46 which rest ovei, an-ular projecti6ns 48 in the edges o,f tile sides: 32. The si)i-iiig is held agailist this equalizer bar by i-neans of a tliuiiibt ntit 50 tl-ireaded on tllc,, lo rear eiid of the bol'u 43, a Nyasher 51 being pi-eferably iliterposecl between the spriiig aiid the iiiner face of the nut. Tbe: member 35 is als6 designed to support spider iiienlbers 52. Each of these members 15 is form6d an(,ular in cross sectioii, the horizoiital flan-e 53 overlying the upper ed--es o the member 35 on the sides 32, -,VI-liie the depend.iii-, fl,,tno-es 54 extend olitwarclly of the sicle ai,'I'Iis 36. The srider men-lbers are pi-v2o otecl as at 56 to these side arms adjacent their foi-ward tipper corners@ and each side arm lias fixed thereto a lua 57 which depencls i,ea@-wardly of the base 9,8 and when brought thereagaiiist limits the tiltin(y movement of t:5 the spider meiiibers in one dir6etion, wh-ich it sbotilcl be iioted, is in the opposite dii-ectioii from the liiuit ili'lpose(i by impiiiement of the base 38 against tlie edges of the sicles 32@. The lappei- @dces of the sicle arii-is 30 @'6 are beveled slio-htly at their rear portions as at 60 to furiii@h stops for tlle tilting of the spidei- ariiis 52 relative thei-eto in the 6ther direction this bein(,y sliown in Figure 3. The luas 57 dre noi@mally held iii 35 contact ivith the b@@e 38 by means of a spring 65 - ",hich surrounds a 'bolt G6 extending tlirough the base 39 ,tnd baviiig its be@id 67 beai-ii-ig against its forwai-d f,,ice. At one end the sprin(Y 65 be,,irs a,,,ainst an equalizer 40 bar 68 which bas it its ei-ids V shape-i ti-unnioiis 69 eiioa--ing over ,ingle projections 70 4 oii the Itio-s 5 At its other en(I the sprii-ig 65 ep-gacyes agailist a ivasher 71 and the pi-e,-,sure exei@ted by this spring agai@nst, the eqlial C) izer is idjustable bl, mcai-is o,f' a tl-iun-ib ntit 72 tlire,,ided on the i,ear end of the bolt 6(i aiid bc,,ai@iiig on the washer 71. At the eiicls of tlle spider,arnis 52 ai-e slioivn holes 75 for@ tlle receptioll of @ screi,@Ts 50 76 by which a seat 80 is fixed@ in position tl-iereto. To the reai- of this seat 80 is fixecl ,t bacl@ 81. -kv,hich is shown provicled with a forward bend or swell 82 some distance above the seat and aboare this a. coiicaie porat tion as 83. Tb-ese ar- so sliaped ti-i,,tt Ni,lien the seat 80 is tilted forwird afzainst 'Lhe Pr-ssure o@f the sprin- 65, the @i)iciel, "irnis 52 tilting. about the pivot 56 swingino, the lugs 5@ a-way from the base 38 60 as shoivn in Fi,-,Lire 3 ' the @Lipper portion ,it 83, y of thig bacl@, a.9 , ftirnishes a slighti, f6rwardl inclined bicli: rest, -ts shown in dottecl liiies in Figure 1,Nvliieh provides @i prol)or stipport for tli(, bick wben the occit65 pant @6f the chair is leaning slightly foriiard. When the chair is in uprioht positioii (Figures I and 6) or tilted rearwar,dly (Fi(,ui-e 4), the sw 11 82 confornis sufficiently e to the curve of the bacli to pi-ovide proper stippoi-t tliei@efor. lvhen the seat is tilted 70 backw,,,,i-dly the iiiembei, 35 pivots about the ',,,:xj's 37, tlils iiieniber 35 and the spider arms pivotin(- as a unit; tl-iis actioll bein 9 Opposed by the forward sprin(y 42 as sliown in FigLti@,(, 4. zn 75 lt will be noted that the seat tips forivii-dly abbtit a piiot closely adjacent thereto ancl reai,wai,dly about: a pivot more remote so that ther'e is little forwa'rd iiioveiiient but consider ably 1-iiore rearward move80 mclit wheii the seat is tilted.@ Tlle mouiatiiig of the chair in this manner causes it to assume a n6rinally Mid ori untilted positioil from Nvliieh it naay be@ reMoN,ed only by the exertioji of su bstantial '85 pressure in eiiher T-orward or backward dii-ections. When iii this mid posit-ion therefore the chair is in a stable conditi on in iihicli it tencls strongly. tb remaiii, thougli ivlieii6ver it is d6sii-ed t.0 tilt it either forwardly oi, b,,ielcwardly this may b@, done by exertiiig . s-t,iffici.ent p@esslire -on the seat to overcome the action of the springs resisting siich iliotion. Havin(y tli-Lis clescribed an emb6climent of Uri this invention it shotild be@ ' evid,ent: to those sl@illed in the art that raany:chano-es and modifications may be inade the ein without r departing fi-om its spirit or scope a,@ defined, by the al,)pended claims. 100 I