USRE541E - William - Google Patents

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` .MBHOVEMENTW Rell-Refine@ YYHEi-'S Specificationforming lui-rl of' Letters To all irlmmyi nidi/'concerni licv it kno \\'i;in,`,oi' l hure ingested n. certain new nud nselfnlliu,

sultsfth'zitit the snilluinner. vert bennnlei'ii,v

straight lines freni hub the .riiirgin conl ti'nctinget' the rilurhns "ontr'ictex'l iti'uusty eitherbreztls bewseserio'us trziiued este" be iuezilinble when cold ot" resisting' tlie'uinrs7' coneussions, lindyiji'brittions to' which rnilrnnii enrwheelsnresubjeet in itli the rie/w t6` :ivoid 'this` strniningA null breaking et the inetnl iu c'nsiingg'lsueh wheels vhante been 'enst with` two, vdishi'ug` or concevo-convex'fphi/res conuecving theftwo edges o i'y the i'iin withthe hub, havingI nhollow spneefbetw'een the two.; This was eiectuztl'to deci-tain extent, for they two plates being-euried-t'roui the riiu'to' the hub yield to the contraction by simply bending; butin practice such wheels here failed to give nsatisfaction for yvarious reasons, but mainly on aeeount of their liability to breuk along that vportion of the treed of the rim oi' the Wheel which is opposite to lthe hollow space between the two plates, that being;` the pant of the tre-id which rests mainly on the rails, nud which is most vexposed to weer and to violent coneussious when in use. XVith the view to i-woid this defect, and nt the saine time avail oi' the important idea of having the metal curved between the hub and the rim to yield by bending to the unequal'coutraetion, prior to my said invention wheels were mede hollow around the hub,presenting e form which in e section passing through the wheel-in the plane ofl its axis would represent two plates, starting euch from neer one end of the hub i :intl @ffiiiwfelllin'y l'ili'liosite directioiisni'niniiii i n tion relates tol'iin proteinen vte 1 UNITED., STATESPATENTI, QFFlCxEe in Voliiy pluto lvlnnitijlie 'u'iillillefottlielilisininfe" betweenvtlic lillb 'unl riin, zuidilielne 'extenlt inge; inL 'light linesto th'erih'i 5 :unl thi "single ulougk'tlnit porti exposed to s or olherwi to unite nud Yorin n seeoilid solid"ringbetweeu the sind yhollow I(inuulus und tlie liuli,"nn i ngztiii dividing them. intotii'oniudy' enrving thi-in' outwfn-dfin opposite directions lto "cou-1: neet with the hub et or neer the ends thereof, forming' a, second hollow' nnnulus nea-r to the hub. l

By the curvature ot' the piates between the soiid lnirts `.1nd speci-:illy neer to the rim ainple provision is secured for bending to yield to the unequal contraction, such eurvatures at the sinne time securing the required degree of elasticity to prevent serious injury by the vibrations to which railroad-wheels :ne exposed in use, while :it the sinne time the union of the seid plates into n. narrow solid ring, forming the connection with the riin :it or neer the riddle oi' its width, gives ample support and strength to that pui-t ot' the riin in 'formingthief l in the usual man-ner ot c nig which isv -inost exposed to fracture; and what isalso of great importance the metal is so disposed as to present, in addition to the other advantages, such a disposition of tlie metal as to securey ample strength .to resist all the-concussions to which wheels are exposed `in use.

The formation of my wheel is as follows: The-chilled rim or tread and outer ian ge, a, of

, :the Wheel and the hub or nave (which hub is,

:one piece, as is shown in Fig. 2) are like those in usefprior to my said invention; and the said rim and hub of the wheel are connected together by the following concentric annular' parts, starting from near the iniddleot' the inner circumference of the said chilled rim toward the hubthat is to say, first a narrow solid ring of metal, f, expanding ynext 'intofa hollow ringof metal. c, the pret'erabie forni of which is such that a transverse section thereof would prescnt'thc shape of two acute or lancet-shaped arches united at their` abutments, .and their vertices or crowns respectively be ing` in a line from the said middle of the rim to near the middle of the hub,v contracting .next into another solid ring of metal, d, and

expanding next between that' andthe ends of thev hub into one-half ot'.- another such hollow ring of metal b, a transverse section of which would resemble such arf arch as aforesaid, its crown joining the last-inentioned solid ring, and its extremitiis or abutnients, respectively connected with theends ofthe hub, and inclosing an annular archshaped hollow space around the hub, all so arranged as aforesaid that a plane extend-ing from near the middle ofthe length of the hub to the middle ot' the' length of the said inner circumference of the riin would divide all the said annular parts and their incloscd spaces into two equal parts. I leave three (more orless) lioles,c,on the inner or llange side ot' the wheel through the respective hollow rings by which the cores on which theyare cast are Sustained in the n iold and ateruardiremoved with cores.

, 1t is obvious',thatin'iia more hollow annulimtubes nire. the one shownv in the drawlhgs and inarlieil c can be added,

posed in use.

and that theshape of the hollow rings may beI varied Awithout materially affecting theprinciple or usefulness of th invention.

t The hub may with advantage be placed, as' l I exhibited in Fig. 2, a little more toward the inner or flange side than the outer side of the wheel, witha slight variation in shape of the connecting parts to meet this arrangement.

From the foregoing it will be obvious that one part of my said invention maybe empio ed t'o advantegewithout the'otherbsulstlu ing fbrthei nner oi1e of the two solidv ringsy and the inner hollow annulus or ring some other mode of connecting'with the hub the plates which form the hollow annulus or ring nearest the rim but the best results will be obtained by the use of both"v parts of .mysaid What I cia'imas lmy invention, aid desire to secure by Letters Patent inrailroad-wheelsto be cast in onewp'iece with a' chilled rim, isf- 1. AThe formingfbf auch wheels with a. hol- 'lowconcentric anni; orf ring,y the plates forming a curve,"ubstantill y asfspeci fied, to lyield, by bending, to the unequal contraction, in combination with the' connection thereof with the rim at or near the middle of its width, by means of the solid ',ring, substantially as described, togive' the required 'supportto that part of' the rim which is most exposed to fracture in use, asset' forth. j

2. In combination with the.. hollounannulus or ring connected Ywith the rim by a solid ring, substantial-ly' as described, the inner hollowannulusor ring' neit to and connected with a the hnbg'snhstantially as described, and con- "nected with another hollow annulus or'ringby a solid ring, substantially as described,`where Y hy ample provision for' yielding to the unequal contraction is obtained, w'hile'a't the same time the metal composing' the wh'eelis so disposedas to prevent in a' great measure theiniuriou's el'ects of vibrations, and to resist the jars and concussione to which railroadwheels are ex- XVM. B. THEAD'WELL.

`Witnesses:

. i ANDREW- Dickies',

i ltuim; M. Roon.'

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