US1219717A - Draft and buffing mechanism. - Google Patents

Description

G. H. FORSYTH. DRAFT-AND BUFFING MECHANISM.

APPLICATION FILED NOV. 26, 1901.

.4. ,2 1 39,? l '7 Patented Mar. 20, 1917.

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G. H. FORSYTH.

DRAFT AND BUFFING MECHANISM.

APPLICATION FILED NOV. 26 I907.

Patented Mar. 20, 1917.

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Eu 55 a!!! iw iii-n moans smartesonon H. FoRsYtrH, or cHioAGofILLInoIs;'AssIeNoB To wane DRAFT GEAR COMPANY, a oosroaatrron or ILLINOIS.

snarl: Ann eams MECHANISM.

Paten tedhia 20, 1917.

12193717 V i i Specification of Letters Patent,

i Application filed November 26, 1907. Serial No; 403,949.

To all whom it may concern: I

Be it known that l, Gnonon H. Foasrrn, .a citizen of the United States. residing at Chicago, in the county of Cook andState of Illinois. have invented certain new and useful Improvements in Draft and Buffing Mechanisms, of which the following is a specification.

- This invention relates to draft and butt"- ing mechanisms for railway cars, and pertain's in part to a new and improved form of yoke'designed to afford increased clearance under side movement of the draw-bar, having a maximum strength for the amount otmaterial employed in the same; in part torneans for connecting the same tothe draw-bar affording a stronger attachment with the latter; and in part to a novel onstruction of follower. designed to render my improved yoke or draw bar extensioninter.

changeable, when required, with a standard yoke.

One of the objects of the invention is to provide a construction affording increased clearance for lateral movement or side play at the inner end of theyoke or .draw-bar extension without sacrificing the strength of the lat a: Another object of the invention is to provide an improved connection between the yoke and the draw-bar that shall reduce in large. measure the shearing strains on the connecting rivets, and in this connection it may be said that while, 1 herein referto and illustrate rivets. as a suitable means for connecting the draw bar and yoke, it is to he uinlerstood that other analogous connectinginemhers may be employed and the term rivet is used herein-as including generally such connecting elements. Another object of the invention is to provide a novel construction of drawhar shank which shall permit the rivets or analogous deviccs securing the yoke thereto to be applied in a more etiicient condition. My improvements permit rivetsto be heated throughout their length and then riveted without producing any substantial bending or buckling of the rivets under the hammering operation, and permitting swelling of the rivet rnd filling of the rivet-hole. other minor aims and objects of the inven tion "11 be apparent from the following description. 'In the accompanying drawings I have ing the followers.

.1nvention.. in WlllCl1- Figure .1 is a top plan view of a draft and boiling mechanism embodying one form of.my.improvements. Fig. 2 is a central longitudinal sectional view of thesame. ,Fig. .3 is a perspective detail view of the F 1g, 4 is a crosssecti0nal view on the line 4- 1 of; Fig. 2. Fig. is a cross-sectional view on the line of Fig. 2. Figs. 6 and 7 are top plan and central longitudinal sectional views,respectively, of a modified form of the invention. sectional view on the line 8-8 of Fig. 7. Figs. .9 and 10 are top plan and central longitudinal sectional views, respectively, of auturther modified form of the invention. .Figzll is a cross-sectional view. on. theline 11-11 of Fig. 10. Figs. 1-2 and 1?) are top plan and longitudinal sectional views, .respectively, more particularly illustrating yoke-engaging-face of one of the followers.

.Fig. Sis a cross the form of my improved yoke or drawbar extension. and the manner in which I obtain an increased clearance for lateral .eachof which is herein shown as of a .1101- low .or shell fornihaving a pair of. twin compartments separated by a central longitudinal partition 3 for the accommodation of the twin draft and boiling springs at: said partition also reinforcing and strengthentiretv the draw-bar extension or yoke; and it will be observed as constitutingan important feature of the present invention that this memher has at its inner end 5 a considerably decreased width as compared with its forward end adjacent to the draw-bar.

Mrcferably. and as more clearly illustrated in the enlarged views Figs. 12 and 13, the yoke is tapered between the inner end of the draw-bar and the inner end of theyoke, gradually contracting; in width toward said inner end of the yoke,v and. to compensate .i ;u point .of strength for such narrowing of the yoke. I reverselytaper the horizontal -'lunbsthereof. as Shown in F153;. 13, mak ng them of graduallv increasing thickness/ ron 5 designates as an en,

the inner end of the draw-bar to the inner end of the yoke. In this way a substantially uniform extent of cross-sectional area is maintained throughout the horizontal limbs of the yoke from end to end; and this provision is preferably carried out through that part of the yoke which overlaps the butt of the draw-bar, the inetal adjacent to the rivetholes being increased in amount to substantially the extent of the metal displaced by the said holes. In other words, a reduction in either crosssectional dimension of the yoke at any point is offset or compensated for by a substantially corresponding increase in the other cross-sectional dimension, or by adding metal to compensate for metal removed for apertures. It will be evident that the inner end of the yoke might be reduced in width for the obtaining of greater clearance between the rear followerstops by giving to the rear portion of the yoke a uniform reduced width instead of tapering the sides thereof. The latter form is preferable. however, as it increases the transverse strain-resisting strength of the yoke adjacent to the draw-bar where such strains are greatest when applied to the end of the yoke and transmitted through the leverage thereof. In order to obtain the same extent of lateral pla or side swing of the draw-bar under bu 'ng movement as under draft, greater clearance is required between the inner end of the yoke and rear stops than is required between the rear end of the drawbar or forward portion of the yoke and the front stops, and this is especially true in-constructions employing a relatively long yoke and also in constructions where the drawbar and inner end of the yoke continue to pivot centrally of the front and rear followers, respectively, in side play, as they ought .to do on curves.

Another feature of my invention resides in the provision of a central cross nember of the yoke that is preferably formed integral therewith and is located between the inner end of the drawbar and the front face of the forward follower, and is designed both to relieve to a large extent the connection between the draw bar and yoke of injurious strains and to form a bearing during buiiing between the draw-bar and the front follower. This cross-member, as shown in Figs. 1 and 2. takes the form of a pair of inwardly projecting lugs or bearing blocks that are cast integral with the'upper and lower limbs of the yoke, respectively, and are formed with rounded faces, as shown by the dotted lines in Fig. 1, to engage the front follower, which in this particular illustration is shown as provided with a cooperating surface 9 of the follower shell, this construction effecting an automatic re-centering of the draw-bar when drawn to one side. The yoke engaging face of the folldtver shell is provided centrally of the concave surface 9 with a horizontally disposed fillet 10 (Fig. 3) that occupies the space between the inner ends of the lugs or bearing blocks 8, as clearly shown in Fig. 2. The main purpose of the fillets 10, the outer face of which lies substantially flush with the outer face of the follower, is to permit the application of an ordinary or standard yoke in cases of emergency repair, where the special form of yoke herein shown might be unavailable, since the distance between the faces of the fillets of the front and rear followers is substantially equal to the distance between the front and rear follower-stops,

which in turn is substantially 'the distance between theouter faces of the front and rear followers. strengthen the followers. The rear follower has its rear or operative face formed the same at the front face of the forward follower, and its fillet 10 engages a space be tween the upper and lower bearing blocks indicated at 11 in Figs. 1 and 2, the same as in the case of the forward follower. 12 designates the hollow draw-bar or coupler shank, the inner end of which is cast with a series of vertical rivet holes 13 therein designed to loosely fit at their central portions the shanks of rivets 14 that secure the drawbar to the yoke. The endsof holes 13 are of sufiicient size to permit rivets when heated throughout to be easily passed therethrough, but nevertheless centrally prevent buckling and bending of the rivet underthe hammering operation, thus making a more efficient and stronger.'"connection and permitting sufficient swelling of the rivet to fill the' ends of the rivet hole.

The butt of the draw-bar is overlapped by Said fillets also reinforce and.

the upper and lower limbs of the yoke, as

. yoke filling plates or shims 15 that are pro vided on their longitudinal edges with upwardly and downwardly extending lips 16 and 17, respectively, (see Fig/5) that over lap the adjacent sides of the yoke and drawbar and afford substantial. reinforcement against undue relative lateral or angular movement, between said parts. The ends of the limbs of the yoke are extended over the draw-bar beyond its butt, and are secured thereto by a rivet 18 in, a manner similar to the described manner ,f applying the rivets 14. The inner end'or face of the butt of the draw-bar is designed to contact against the lugs or bearing-blocks 8 to back up the latter; and to insure such contact and also to receive the lateral strains and relieve the rivets of shear I preferably employ between the draw-bar and the yoke, as shown in Figs. 1, 2 and 4,,other horizontally acting shims or filling plates, preferably 111 the form of wedges 19, the inner inclined edgeof which engages a correspondingly inclined shoulder of the butt of the draw bar, while its outer inclined edge similarly engages an internal inclined edge 21 of the downwardlyturned end of the yoke. The

" tended intothe yoke 5, as shown, the wedge 19 is slotted as shown at 22 in Fig. 1; and the projectingends of the wedge opposite the open end of the slot is advantageously inwardly lipped, as shown at 23 in Fig. l, to overlie the side of the draw bar and thus toflserve "as a. "retaining member for :the

whereby is secured draw bar and also to lock the wedge plate in place. It will be seen that by driving these wedges 19 into place the overlapping ends ofthe draw-bar and yoke are forced in oppos te d1'rect1ons, thereby securing a firm longitudinal connection of the two parts.

It will be seen that the wedge plates or shims when positioned cotiperate with the overlapping ends of the draw and yoke a predetermined relation, and it will be noted that aside'from' the yoke rivets the wedges or plates are of themselves sufficient to insure a connection between the draw bar and yoke. Theyoke is prpyided ofi its longitudinal edges with '"IllSed reinforcing ribs Qlwhich preferably extend the full. length thereof'and are continued across the inner end or cross-member of the yoke.

The modification shown in Figs, 6, 7 and 8 differs from that herein above described chiefly in the substitution of a separable transverse bearing-b ock 8 that secured between the longitudinal limbs of the yoke by a rivet 25; the ends of said bearing-block being, however, countersunk in the inner,

faces of said limbs, as shown at .36, so as to relieve the rivet of shearing strains. In this construction 1 have also shown the use of a similar separable bearing-block 8" at the rear or inner end of the yoke, the same being secured imposition by a rivet 27. To relieve the rivet 27 of shear, I preferably form on the rear vertical corners of the block 9" ribs 8 which preferably lie in correspondingly formed depressions in the sides of the vertical inner end member of the yoke to avoid increasing the width of the inner end of the yokes. Furthermore, the inner face of the' vertical inner end member of the yoke, against which the bearingblock S abuts is substantially in the transverse plane of the operative facesof the rear follower stops, so that, blocks the yoke may be used with a plain standard follower whose outer face is substantially in the transverse plane of the op erat-ive faces of the rear follower stops. Preferably, also, 'tl'ieforward surfaces of the block 8 and the vertical limb of the yoke .are rounding, as shown in 6,

which affords a. rounding (ii-convex bearing face on the follower, vwhichever is used. The separable bearlng-blo'cks S and 8* are more especially'designed to be used in cast y knocking out the bearingmetal yokes in order to insure a uniform distance between the engaging members of the front and rear followers, since a casting is liable to vary. In this case, I have also shown laterally acting retaining means for the. draw bar consisting of lips-28 formed integral with the sidesof the yoke and overlapping the vertical sides of the butt of the draw-bar, as clearly shown in Fig. Sand serving the same function as the lips 16, 1?, and 23 of the plates 15 and 19. The tightening wedges 19 are omitted in this form; but a' similar result is secured by forming on adjacent surfaces of the draw-bar butt and yoke cooperating inclined shoulders 12 and-521espectively, either or both of whichmay be employed, and which operate, when the sides of the yoke are drawn together by the connecting rivets, to relieve the shear on the lat ter by taking up the lateral strains as also to hold the end of the draw-bar against the bearing-block. In Fig. 8 I have illustrated an adjusting means for securing a fit between the inner end of the draw-bar and the limbs of the yoke and compensating for irregularities in casting, the same consisting in forming longitudinal ribs or fins 29 on the inner faces of the ends of the yoke that can be readily planed off by a cold chisel or similar tool to afforddncreased space for construction of yoke, and for purposes of adjustment and fitting the ribs 29' are also provided. l igs. 9,10 and 11 likewise show a single central longitudinal reinforcing rib 24* on the yoke.

It will lee observed that in all the forms of the invention illustrated the yoke is provided with through which the strains are transmitted directly to the followers, which bearingblock is either integral with the yoke or a transverse bearing-block secured thereto by rivets or otherwise. Further, this bearing-block at both ends of the yoke lies within a depression or concavity in the operating face of the follower so that its presence does not involve any increase of the standard length of the yoke or any increase of the standard length of the draw-bar between the front follower and the coupler head. In case, therefore, any of the bearing blocks 8, 8, 8 or 8 becomes broken or requires removal, or the entire yoke has to be replaced by any other standard yoke, the inner end of the draw-bar and the transverse member of the yoke will cooperate with the followers, through dngagement with the fillets 10, in the usual manner. My invention thus provides for the contingency of emergency repairs with the ordinary and other standard forms ,of yoke. It will be noted that the yoke is so constructed as to present with the draw bar coacting inter-engaging members which prevent their separation longitudinally and their disarrangement laterally when once assembled and yet to permit their ready assembling and interlocking, without disturbing the normal position'of the draw bar head relative to a vertical line as by rotating the draw bar. in the present case the interlocking being effected by a relative lateral bodily movement of the yoke parts relative to the draw bar as distinguished from a rotary or a purely longitudinal movement. It Will be seen that when so assel-hb'led and interlocked the integral or adjunctive parts of the yoke, such as the lip." 28, or the shims 15, and 19 and their lips 16, 17 and 21- serve to confine the draw bar against undue lateral motion within the yoke when the yoke arms are connected to or upon the draw bar by the key or rivets.

I claim:

1. A draw-bar yoke, having cross-sew tional forms at different points thereof of varying dimensions but of substantially uni form strength to resist strains, substantially as described.

'2. A draft mechanism, comprising followers, followerstops, a draw-bar, and a yoke, said yoke being narrower at its rear end than at its point of connection with the draw bar and correspondingly thickened in vertical section at said rear end to offset its reduction in width, substantially as described. 3. A tapered draw-bar yokeof less width at its inner end than at its point of attachment to the draw bar, and of reverse taper in vertical section to maintain a substantially uniform strength at all points of its cross section substantially as described.

4. An apertured draw-bar yoke' having cross-sectional forms of varying dimensions but of such proportions as to afford a substantially uniform resistance to strains, sub stantially as described.

5. A draw-bar havinga rivet hole the central portion whereof has' a diameter slightly greater than that of the rivet, substantially as described.

6. A draw-bar having a rivet hole the central portion whereof has a diameter slightly greater than that of the rivet, whereby, to facilitate the insertion of the rivet and prevent undue buckling of the same during swedging thereof, substantially as described.

7. In a device of the character described, the combination of a draw-bar having a shoulder at its inner end, a yoke secured thereto, the latter having forward and rear integral bearing members adapted to engage and confine the inner end of the draw bar therebetween, and a wedge disposed between the draw bar and one of the bearing members whereby to secure a tight fit between said shoulder and the other bearing member. substantially as described.

8. The combination with a draw-bar having an external projection adjacent to its inner end, of a yoke having a corresponding projection adjacent to its outer end, a key member inserted between said projections, and means for securing said yoke to said draw-bar, said key member serving to prevent undue lateral play of the parts to relieve the shearing strain on the means securing said yoke to said d aw-bar, substantially as described.

9. The combination with a draw-bar shank having external projections on opposite sides thereof, of a yoke also having in ternal projections on opposite sides, and a wedge-shaped key member inserted between the projection on one side of said shank and the projection on the corresponding side of said yoke, and means connecting said yoke to said draw bar, said key member serving as a shim to prevent undue lateral play to relieve the shearing strain on said connecting means, substantially as described.

10. The combination with a draw-bar. of a yoke, and a draft gear, said yoke being provided with a bearing member having a rounded follower-engaging face lying be tween the draw bar and the draft gear and engaged by the rear end of said draw bar, substantially as described.

GEORGE H. l ORSYTH.

Witnesses Santa-:1. N. loxn, James ll. ()rrTu'Ln.

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