US1270598A - Draft-gear for railway-cars. - Google Patents

Description

W. H. COTTON.

nRAFT GEAR FOR RAILWAY CARS.

APPLICATION FILED APR. 4. I9I6.

Patented Juno 2 2 SHEETS-SHEEI l.

W. H. COTTON.

DRAFT GEAR FOR RAILWAY CARS.

APPLICATION FILED APR. 4, I9I6.

Pzitented .Ilmo 25, 1918.

2 SHEETS-SHEEI 2.

a I l l lllllllllllllll 'erre WALTER H. COTTON, 0F CHICAGO, ILLINOIS.

DRAFT-GEAR FOR RAILWAY-CARS.

Specification of Letters Patent.

Patented June 25, 1918.

Application filed April 4, 1916. Serial No. 88,849.

To all fio/tom it may concern:

Be it known that I, WALTER H. Co'r'roN, a citizen of the United States, and resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements n Draft-Gear for Railway- Cars, of which the following is a specification and which are illustrated in the accom panying drawings, forming a part thereof.

The invention relates to draft gears of the so-called friction type, as to some of its features being, however, applicable to gears without regardto the particular character of the shock-absorbing elements.

The objects of the invention are to secure a high degree of efficiency, simplicity of construction and convenience in assembling.

The embodiment of the invention hereinafter described is illustrated in the ac companying drawings, in which- Figure 1 is a central vertical section of the gear;

Fig. 2 is a plan view, partly in section;

Fig. 3 is a plan section showing the gear under compression;

Fig. L is a detail in plan of the coupler and its extension, showing a modified form of construction;

Fig. 5 is a view in perspective of one of the wedgng elements of the gear; and

Fig. 6 is a view in perspective of the rearward follower of the gear.

The draft sills of a railway car are represented at 10 and 11, and are provided with the usual draft lugs 12, 13, and bufling lugs 14, 15. The rear end dof a coupler is shown at 16, and as being of the M. C. B. standard form of construction.

The coupler extension for transmitting draft stresses to the gear consists of a pair ofbars 17, 18, attached by any suitable means, respectively, to the top and bottom faces of the butt of the coupler, and each having its rear end inturned and given a hooked form, as shown at 19, for engaging a beveled face of the rearward follower. As shown in Figs. 1 and 2, the bars 17, 18, are secured to the coupler by means of rivets, as 20. If desired these bars may he detachably secured to the coupler by means of a bolt 21, their forward ends 22 being hooked over beveled shoulders on the coupler in the same manner as their rearward ends are in hooked engagement with the rear follower, as shown in Fig. 4.

The beveled shoulders for engaging the bars may be formed directly upon the coupler butt, or the standard coupler may be employed and filling or lagging blocks 23, 24, may be riveted to its top and bottoni faces, the inclined shoulders, as 25, being formed on the forward edges of these blocks. When the bars are thus hooked to a coupler, the bolt 21 is called upon to do no duty other than hold them in place, the draft stresses being transmitted entirely from the coupler to the bars through the hooked forward ends of the latter.

The forward follower' is shown at 26, and takes the usual form of a fiat rectangular plate adapted to bear against the draft lugs 12, 13, and against which bears the inner end of the butt of the coupler. This fol lower is apertured to receive a draw-bolt 27, having a head preferably conical in form, seated within the counter-sunk apen ture in the follower. This draw-bolt extends beyond the buiing lugs 14, 15, and at its rear end carries a spring seat 2S. The rearward follower 29, adapted to engage the buffing lugs 14, 15, is in box form and apertured to accommodate the draw-bolt 27 and parts of the gear mounted thereon. The top and bottom walls of this follower are beveled or forwardly and inwardly inclined, as shown at 30, to receive the beveled faces of the hooks 19 formed on the rearward ends of the bars 17, 18, thereby preventing the bars from spreading under the influence of draft stresses.

The inner side walls of the rear follower are forwardly and outwardly inclined, as shown at 31, 32, for the purpose of engaging the outer faces of a pair of triangular friction blocks 33, 34, which are seated against the forward follower 26. F or convenience of manufacture the beveled faces 31, 32, may be formed in part on blocks 35, 36, fitting within the chamber of the follower 29, and in part on the inner edges of instanding flanges 37, 38, at the front edges of the side walls of the follower.

A sleeve 39 is slidably mounted on the forward end of the draw-bolt 27, its forward end taking the form of a wedgeshaped head 40 located between the blocks 33, 34, and engaging their third faces. The blocks 33, 34, are recessed, as shown at 41, to receive the draw-bolt 27 as they move inwardly.

An abutment 42, forming a spring seat, is slidably mounted on the draw-bolt 27 and bears against the rearward end of the sleeve 39. A spring or, as shown, a pair of nested springs 43, 44, encircle the draw-bolt 27 and react between the spring seats 28 and 42.

In draft the rearward follower is drawn forward, its inclined faces 3l, 32, sliding upon the blocks 33, 34, and forcing them inwardly and thereby forcingbaclrwardly the sleeve 39 and compressing the springs upon the rear seat 28, which is held against movement by the draw-bolt 27. Friction is developed between all of the contacting inclined surfaces and also between they follower 26 and blocks 33, 34. Upon the release the parts are returned to their normal position by the expansion of the springs, the movement being retarded by friction.

In buff the forward follower is moved backwardly by the coupler, carrying with it the blocks 33, 34, which are moved inwardly by the inclined faces 3l, 32, thereby forcing baclwardly the sleeve 39. As the rear spring seat 28 is carried back with the forward follower, the backward movement of the sleeve 39 is approximately double that of the movement of the follower 26, thereby permitting' the inward movement of the blocks 33, 34, until they come in contact each with the other, without unduly compressing the springs. Thus the necessary frictional resistance is developed by a long range of movement of the frictional surfaces under comparatively light spring resistance, insuring a smooth action and reducing the wear.

The aperture in the rear follower is sufficiently large to permit the passage therethrough of the head 40 of the sleeve 39,v thus facilitating repairs. The spring seat 28 is held in place by a nut I-1-5 on the end of the draw-bolt 27. By removing this nut all of the parts carried by the draw-bolt may be withdrawn `backwardly, and hence it is unnecessary to remove the gear from the car for making ordinary repairs.

I claim as my inventionl. In a draft gear for railway cars, in

combination, a forward follower, a rear-` extending through the rearward follower and having a spring seat at its rearward end, a sleeve on the bar and projecting through the rearward follower and having wedging faces at its forward end, a spring seat at the rear end of the sleeve, a spring reacting between the two spring seats, andy a pair of triangular wedge blocks seated against the forward follower and interposed between the wedging faces of the sleeve and the frictional faces of the rearward follower.

2. In a draft gear forrailway cars, in combination, a pair of opposed followers, coperating'-fr'iction elements associated, respectively, with the two followers, a spring located on the axis of the gear and back` of the rearward follower, a seat'for the rear end of the spring such seat being connected with the' forward follower, a seat forthe forward end of the spring, and a wedgingl element associated with the last named seat and engaging wedging faces'of the friction elements associated with theforward .fol-r of opposed followers, onev vthereof having inclined friction faces, a pairof triangular blocks engaging thev inclined friction faces of the follower and being' seated against the other follower, a wedge element interposed between the triangular blocks, a rod. eX- tending through the wedge element and one of the followers, such rod being attached to one of said parts andslidably engagingy the other and having a spring seat at ,the

end opposite its attached end, and a spring reacting between the seat andthe element with which the rod is slidably engaged.

WALTER n.l oo'rTo/N.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner ofiPatents,

Washington, ID. C.

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