US1093392A - Draft-gear. - Google Patents

Description

R. E@ FRAME.

DRAFT GEAR.

APPLIOATION FILED Nov@ 191s.

Patentd. Apr. 14, 1914.

R. E. FRAME.

DRAFT GEAR.

APPLIGATIQN FILED Nov. s, 191s.

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Specification of Letters Patent.

Patented Apr. 14, 1914.

Application filed November 6, 1913. Serial. No. 799,479.

State of Indiana, have invented Certain new and useful Improvements 'in Draft-Gears, of which the following is a speciiication, and which are illustrated in the accompanying drawings, forming a part thereof.

rlhe invention relates to. draft gears for railway cars of the so-called friction type.

The object of the invention is to secure a high degree of eiliciency, and to provide for a progressiyje development of the frictional resistance"'by bringing the elements into action successively. These objects are attained by the construction illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of the gear partly in section; Fig.'2 is a transverse ver tical central section through the gear; and

Figs. 3, 4 and 5 are plan sections of-'the gear showing it in diderent positions.

The gear is illustrated as being applied to a railway car, there being shown a pair of draft sills 10, 11, provided with draft lugs 12, 13, 14 and i5 of any desired form. The gear inclosed within a yoke 16, here shown as of the conventional type and as being attached to the butt of the coupler 17 by means of rivets, and there is present a supporting plate 18, bolted to the draft sills and upon which the yoke rides, and a tieplate 19 uniting the draft sills above the gear. ,These parts do not appertain to the inveption, and take any form as des1ret.

The gear comprises a pair of front and' rear casings 20, 21, of box form. The two.

casings are alike, and each is provided with a pair of shoulders 22, 23, 24, 25, for engaging the draft lugs 12, 13, and 14, 15, respectively. The forward casing 20 bears against the b utt of the coupler 17, and the rearwardcasing against the rear end of the yoke 1G. Housed within cach of the casings is a pair of springs 26, 27, and 28, 29, arranged onc within the dt-her, though, if desired, a single spring only may be used with each casing. These springs are seated against the inner ends of the castings and react against followers 30, 31. Each of these fol lowers has a flat iace for engaging the springs, and a pair of inwardly inclined wedging faces which coperate with triangular friction blocks 32, 33, 34, respectively. Be-

yond the inner ends of the springs the walls of the casings flare, as shown at 36, 37, 38, 39, to form wedging surfaces for engaging the outer faces of the triangular blocks.

Inter-posed between the forward triangular blocks 32, 33, and the rearward triangular blocks 34, 35, there is a compressible abutment comprising a pair of laterally` movable .wedging elements, generally designated by the numerals 40, 41. The lastnamed elements are chambered, and there -is located between them a spring 42`which urges them apart. The side walls 43, 44, 45 and 46 of the members 40, 4l, are inclined inwardly and toward the .ends of the gear, and frictionally engage the third sides of the triangular blocks 32, 33, 34 and At the outer ends .of their inclined side walls the members 40, 41, are provided with shoulders l47, 48, and 49, 50, and intermediate of these shoulders the outer ends of the members extend "itwardl-y,providing `inclined faces 51, 5,2, 58 and 54.

The inner ends of the side walls of the casings 20, 21, extend beyond the inclined portions 36, 37, and 38, 39, a. short distance parallel with the axis of the gear, as shown at 55, 56, and 57, 58,-these parallel portions engaging, respectively, the shoulders 47 48, and 49, 50. The extreme portions of the inner ends of the side walls of the casings flare outwardly, a's shown at 59, 60, 61 and 62, these outwardly flaring portions engaging the inclined portions 51, 52, 53 and 54 of the members 40, 41, during the inalcompressive movement of the gear. The outer surfaces of the walls of the cas 'ings "may be provided .with strengthening 'ing their strength and providing seats for the spring 42.

When the gear is in release position, as shown in Fig. 3, the shoulders 22, 23, and 24, 25.u of the casings are in engagement with the draft lugs 12, 13, and 14, 15. The parallel portions 55, 56, and 57, 58, of the walls of the casings are in engagement with the outer ends of the shoulders 47, 48, and 49, 50, of the members 40, 4l. As either of the casings is advanced both slide upon these shoulders (the abutment being moved longitudinally toward the stationary casing. until the partsassume the position of F ig. 4,tbe outwardly inclined portions 59, `60,

and 61, 62,- of theV inner ends of the side walls of the casiiigs coming into contact, respectively, with the inclined portions 5l, 52, and 53, 54, of the ends of the members 40, 41. Meantime the triangular wedge-blocks have been forced inwardly, crowding back the followers 30, 3l. Further' advance of the casingI lcauses the outwardly inclined portions of their walls 59, 60, and 6l, 62, to slide upon the inclined portions 51, 52, and 53, 54, of the outer ends of the members 40, 4l, forcing these members inwardly and compressing the spring 42.

Initial friction is developed mainly between the triangular` wedge-blocks and -tlie inclined walls of ,the casings and the followers 30, 3l, there being also some friction.

developed between the wedging blocks and the side walls of the members 40, 4l. During-the linal movement of the'casings friction is developed between the inclined ends of both of the casings and the inclined ends of the members 'ltl, 4l, and between the side walls of these membe' s and the triangular blocks.

The action is the same in both pulling and boiling, and while but one casing moves in either instance Ithe wedging action is identical at the two ends of the gear.

All of the springs cooperate in effecting the release and returning the parts to their normal pl ition, this release, however, being retarded byv the fric-tional engagement of the various members, thereby preventing shocks.

I claim as my invention- 1.1 ln a draft gear, in combination, a pair ofopposed casings, a pair of spring-separated laterally movable members having inclined outer ends, spring seated within the casings, and wcdging elements interposed between the springs and the laterally movable members, the end portions of the walls of the casings being inclined and engage'- able With the inclined ends of the latera ly` movable members.

2. In a draft gear` in combination, a pair of opposed casings, a pair of spring-separated laterally movable members having inclined outer ends, springs seated within the casings, and wedging elements interposedl between the springs and the laterally movable members, the end portions of the Walls of the casings'being inclined and engage able with the inclined ends of the laterally movable members but normally spaced apart therefrom.

3. In a draft gear, in combination` a pair of casings having their sido walls flaring, a laterally comprcssible abutment between the casings, springs seated within the ca'sings, a-

set of wedging elements interposed between each spring and the abutment, the outer ends of the abutment and of the side walls of the casings having cooperating inclined surfaces normally ont of engagement.

4of casings each havin wardly inclined, such inclined' portionsbe-l ing interru ted by portions parallel 'to'ithe fl, springsseated'm the casings,

1l. In a draft gear, in combination, a air of casiiigs, a laterally compressible a utment between the casings and comprising a pair of chambered membrs 'whose outerv ends arewedgesha'ped and a spring urging such members apart, springs Seated..within the casings, and a set of friction elements located between each of the last-named springs and the abutment, the ends of the side walls of the casings being outwardly inclined and engageable with the wedgeshaped ends of the abutment members.

5. In a draft gear, in combination, a central laterally compressible abutment comprising a air of chambered membersthe ends of suc members having shoulders parallel to the line of draft and outwardl inclined surfaces intermediate of such oulders, a pair of casings having their side walls provided with parallel portions engaging the shoulders of the abutment members and inclined portions engageable with the inclined members, springs seated within the casings, and friction elements located between such springs and the abutment.

6. In a draft gear, in combinationa central laterally compressible abutmenty comprising a pair of chambered members, the ends of such members having shoulders parallel to the line of draft and outwardly inclined surfaces intermediate of such shoulders, the side walls of such members be inclined inwardly and toward the ends o the gear, a pair of casings having their side walls provided with parallel portions engaging the shoulders of the abutment members and inclined portions engageable with the inclinedl portions of the ends of such ksprings and the abutment.-

7. In a draft gear, 1n combination, a" pair line `of dra wedging elements seated on the springs, trlangular blocks bearing` on the faces of the wedginfr elements and the inner portionsv of the inclined side Walls of the casings, and a laterally coinpi'essible,- abutment having in clined side `walls engaging the triangular blocks, the ends of the abutment having flat shoulders engaging the parallel portionsof the side walls of the v,casings and inclined faces intermediate of such shoulders.

8., In a draft gear, in combination, a longitudinally movable casing, a laterally compressible abutment, normally engaged coperating bearing surfaces parallel with the line of draft on the casing and abutment, and outwardly inclined cooperating faces on said members coming into engagement dur- .ing the final movement of the casing, vand sets ofcushioningv elements each comprising springsand friction members, and a laten allyfcornpressible friction member interposed V.between the two sets of cushioning `elements and compressively engaged there an initial non-compressive and a nal compressive engagement with the abutment, such abutment comprising a pair of cham bered casings and a spring housed Within and reacting between the easing;

l1. In a draft gear, in combination, a lon- `gitudinally movable casing, a laterally compressible'abutment, such abutment comp-rising a. pair of chambered casings and a spring housed within and reacting between .the casing, normally engagcd'coperating bearing surfaces-parallel with the line of draft on the casing and abutment, and outp wardly inclined eoperating faces on said members coming into engagement during-thc final movement of thecasing, and cushioning elements within the casing and bearing against the abutment.

l2. In a' draft gearin combination, a longitudinally movable casing having daring side walls, two pairs of laterally movable friction elements having .inclined 'surfaces engageable by the inclined walls of the casing successively, and means resisting' the inward movement of the members of each pair of friction elements. r v

13. In a draft gear, in combination, a longitudinally movable easing having flaring side walls, two pairs of laterally movable friction elements having `eorresi'iondinglyl inelined surfaces, the inclined Walls of the casing being normally engaged with such sur faces of one of the pairs of frictionelement-s I and engaging such surfaces of the other pair of friction'elements during the final movement of the casing, and means resisting the inward movement of the members of each pair of -friction elements.

14.` In a draft gear, in combination, alongitudinally movable casing having flaring.

side walls, two pairs of laterally movable friction elements having inclined surfaces enga geableyby the inclinedwalls of the casing successively, members of each pair of friction elements having contacting faces oblique to the axis of the gear, and means resisting the inward movement of the members of each pair of friction elements. Y

15. In a draft gear, in combination, two longitudinally movable casings having their open ends facing and their side walls fiar ing, a pair of inwardly movable friction elements housed within each casing and havin@ inclined faces in constant engagement withJ the side walls ofthe casings, a third pair of inwardly movable friction elements inter`- p'osed between and engaging th'e 'first-mentioned pairs of friction elements and having oppositely inclined surfaces engageable by the inclined walls of the casings only during the final compressive movement of the gear, and means for urgingall of t-he vfriction ele` ments outward.

16. In a draft gear, in combination, two longitudinally movable casings having their open ends facing and their side walls flaring, aipair of inwardly movable friction elements housed within each casing and having inclined faces in constant engagementwith the side walls of the .casings, a third pair of inwardly movablefriction elements. inter lposed between and engaging the first-menof inwardly `movable friction elements, and

a sprilw reacting between the'two members of the tliird pair of friction elements.

ROBERT E. FRAME iVitnesses :1

(ino. I. Bocinas, Crianmzs PORTER.

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