US719949A - Draw-gear and buffing apparatus. - Google Patents

Description

` 190.719,949. PATE-NTSB 1199.9,1903.

J. H. MGGORMIGK. j `DRAW GEAR ANDBUFFING APPARATUS.

APPLIOATION FILED FEB. 28. 1902. N0 MODEL. z SHEETS-SHEET 1.

WITNESSES: INV NTORl @f4 WM l M '210.719,949. '-PATENTED PEB.3,1`903. J. H. MGGORMIGK.

DRAW vGEAR AND BUFFING APPARATUS. w vA PPLnmfrIoN FILED rma. 2e. 1902.

'No MODEL. i 2 SHEETS-SHEET 2.

a@` Y Fish4- @de 56 JOHN I-I. MCOORMIOK,

OF COLUMBUS, OHIO.

DRAW-GEAR AND BUFFING APPARATUS.n

SPECIFICATION forming part of Letters Patent N o. 719,949, dated February 3, 1903. A.Application filed February 28, 1902. `Serial No. 96,060. (No model.)

T0 aZZ when?. zit may concern:

Be it known that I, JOHN H. McCoRMIoK, a citizen of the United States, residing at Columbus, in the county of Franklin Yand State of Ohio, have invented a certain new and useful Improvement in Draw-Gear and Bufting Apparatus, of whichfthe following is a specification.

My invention relates to that class or typeV of draw-gear and buing apparatus in which frictional resistance is employed in connection with a resisting-spring to reduce shocks and prevent rebound` that result from heavy bodies, such as cars, meeting in violent contact with each other. A

The object of my invention is to provide a combined draw-gear and buiiing apparatus of improved construction that Awill have increased efficiency and will have embodied in it the elements of simplicity, strength, durability, and reduced cost of manufacture, as well as being easily adaptable to all existing constructions in cars.

My invention consists in the various constructions and combinations of parts hereinafter described, and more fully set forth in the claims.

These objects I accomplish in the manner illustrated in the accompanying drawings, in

whichl Figure l is a longitudinal vertical section through the center of the draw-gear and buffing apparatus, showing the relative normal positions of the parts, the yoke-strap and the.

end of the draw-bar being shown in full. Fig. 2 is a plan view of the apparatus, showing how it is attached to the car-sills by means of the sill-plates. Fig. 3 isa transverse section of the apparatus, the yoke-strap, and the sillplates on line no m of Fig. l, the spring being omitted for the sake of clearness. Fig. 4 is an end view of the rear follower-plate. Fig. 5 is a horizontal section on line z z of Fig. 4; and Fig. 6 is a longitudinal diagonal section of the apparatus on the liney y of Fig. 3, showing the relative normal position of adjacent frictional plates.

Similar` numerals refer to similar parts throughout the several views.

In the drawings, 1 represents the rear end of the draw-bar. Rigidly bolted to the draw- Abar 1 is the usual yoke-strap 2. Bearing against the end of the draw-bar l and resting top and bottom against the yoke-strap V2 is the front follower-plate 3. Bearing against the rear end of .the yoke-strap 2 is theV rear follower-plate`4. The follower- plates 3 and 4 are preferably made rectangular and have a flange on each edge, which is beveled at the base on the inside. The fianges on the follower- plates 3 and 4 form bearings for the ends of movable segments 5, 5, 5b, and 5, the ends of which are beveled on the outside to conform to the bevel on the flanges of the follower- plates 3 and 4. The segments 5, 5, 5b, and 5c each have radial longitudinal flanges 5d and 5, that increase their strength and at the same time provide additional bearing or frictional surfaces. It will be observed that the bearing-surfaces of the iianges 5 are cut away or hollowed out where they bear against the adjacent anges 5, the recesses thus formed being extended partially into the casing formed by the segments. This is for the purpose of providing better frictional surfaces, as the spaces that are shown as hollow on the frictional surfaces .of the segmentflanges 5d and 5e are to be filled with composition or wood iilling. Each of the movable segments 5, 5, 5b, and 5c have two inwardlyprojecting portions which serve as end bearings for the spring 6. The longitudinal location of the projections ou the segments, in connection with the spring 6, which is located between them, holds the segments 5, 5, 5b, and 5c in their normal positions. Between the end of the spring 6 and the` inward projections on the segments 5, 5, 5b, and 5C is a liat plate 7, which also bears against a central projection 4 on the rear follower-plate 4. By this arrangement the rear followerplate 4 has a direct bearing against the spring 6 and is held from contact with the rear ends of the segments when in normal position. The sill-plates S and 8, which are securely bolted to the draft-sills of the car, as shown in the drawings, are made with flanges on each edge, which serve as guides and bearings for the follower- plates 3 and 4. (See Fig. 3.)

The operation of the parts thus described is as follows: When used as draw-gear, the action is a draft or pulling operation on the draw-bar, and the draw-bar l, the yoke-strap 2, which is bolted to it, and the rear follower- ICO plate4 are moved forward against the resistance of the spring 6, one end of which bears against the rear follower-plate 4 by means of the central projection 43L on the follower 4 and through the plate 7. The other end of the spring 6 bears on the inward projections of the segments 5, 5a, 5b, and 5, two of which, 5 and 5b, bear against the flanges of the front follower-plate 3, which in turn bears against;

the flanges of the sill-plates 8 and Sa. The rst result of the pulling action on the drawbar is to close up the space between the rear ends of the movable segments 5a and 5c and the follower-plate 4. This arrangement is desirable because it allows all slight movements of the draw-bar to be taken up by the resistance of the spring alone, thus saving wear on the frictional parts that are intended to absorb the heavier shocks. The next result of continued forward movement of the draw-bar is that the beveled rear end of the movable segments 5a and 5 on contacting with the beveled part of the ange on the follower 4 will be pressed forward longitudinally and at the same time be subjected to an inward pressure toward each other. The inward pressure on the segments 5*PL and 5c is resisted by the segments 5 and 5b, which in turn are held from outward movement at their rear ends by the parallel portions of the flanges on the rear follower-plate 4. The resistance to longitudinal movement of the segments 5a and 5c comes from the friction that has been created between them and the adjacent segments 5 and 5b by resistance of the spring 6, acting through the beveled ends of the movable segments and the beveled portions of the flanges on the follower-plates. The segments 5 and 5h are held from longitudinal movement in a forward direction, as they bear directly against front follower-plate 3, but are subjected to an inward pressure, as their beveled ends bear against the bevels on the flanges of the follower-plate 3 and are resisted by the segments 5a and 5,which in turn bear against the flanges on the follower-plate 3. Thus it is seen that the movable segments 5 and 5C receive an inward pressure at the rear end, which is resisted by the segments 5 and 5b, while segments 5 and 5b receive an inward pressure at their forward ends, which is resisted by segments 5n and 5C. By reference to Figs. l and 6 it is easily seen that pressure from either direction in pulling or bufting actions is transmitted only through the bevels on the flanges of the follower-plates to the bevels on the ends of the movable segments, and there can be no longitudinal movement of the segments 5, 5, 5b, and 5C unless accompanied by a clamping pressure on all the segments at both ends, which must result in frictional resistance to any longitudinal movement. A buiiing or pushing action from the draw-bar will have exactly the same result as the draft or pulling action just described. The first pressure of the forward follower-plate 3 will clamp all the segments 5, 5, 5b, and 5C together, and

they will all move backward until the spring 6 is compressed sufficiently to allow the bevel on the end of the segments 5a and 5C to contact with the bevels on the ange of the rear follower 4. In the bufling action the segments 52L and 5c now remain stationary, bearing against the rear follower-plate 4,V and the segments 5 and 5b are pushed backward longitudinally against the friction resistance created and the direct resistance of the spring 6, which in this case will bear against the inward projections on the segments 5 and 5. In both draft and bufng operations the return of the parts to normal position is by means of t-he spring 6 after the draft or buing pressures have been reduced or cease to act. The spring in returning the parts must act through the bevels on the ends of the movable segments and the bevels on the flanges of the follower-plates. Any resistance that the draw-bar may offer will be increased by the frictional resistance that will be created between the movable segments. This feature of the draw-gear and bufting apparatus prevents the violent rebound or return of the parts.

It is obvious that the details can be varied considerable without departing from the spirit of the invention. For instance, more movable segments and more springs can be introduced, thus increasing the frictional surfaces and the capacity.

Having now fully described my invention, what I claim, and desire to secure by Letters Patent. is-

l. In a draw-gear and bufting apparatus, the combination of segmental longitudinallymovable parts that bear against each other to create friction, a compression-spring bearing against adjacent contacting segments to force them in opposite directions, and means for pressing the segments against each other, substantially as specified.

2. In a draw-gear and bufing apparatus, the combination of segmental parts bearing against each other and capable of movement longitudinally one toward the other, a spring inclosed by the segments, and means for clamping and pressing the segments together at both ends, substantially as specified.

3. In a draw-gear and bnfng apparatus, the combination of longitudinally-movable contacting segments, a spring pressing adjacent segments in opposite directions, and a wedging device for creating friction between the segments, substantially as specified.

4. In a draw-gear and bufting apparatus, the combination of longitudinally-movable contacting segments, a follower-plate having a central projection, a spring inclosed by the segments, and bearing against the central projection on the follower-plate, and means for creating friction between the segments, substantially as specified.

5. In a draw-gear and bufiing apparatus, the combination of longitudinally-movable contacting segments with beveled ends, fol- ICO IIO

pflacas lower-plates at each end having inside beveled flanges or projections and a spring inclosed by the segments and bearing at each end against central projections on the segments, substantially as and for the purpose specified.

6.' In a draw-gear and bufng apparatus, the combination of longitudinally-movable contacting segments having central projections to serve as spring-bearings, a spring inclosed by the segments, a plate or disk between the end of the spring en one side and the central projections of the segments and the central projection of the follower-plate on theother side and means for creatingfriction etween the segments, substantially as speci- JOHN H. MCCORMICK.

In presence of;

A. L. PHELPS, W. L. MORROW.

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