US1553285A - Draft gear - Google Patents

Description

Sept. 8, 1925. 1,553,285

w. .H. COTTON DRAFT GEAR Filed Sept. 1. 1923 2 Sheets-Sheet 1 [n yen for: waz ("7 6061271 Patented Sept. 8, 1925.

uN-iTEo ST-AT ES PATENT oFHcE Qf;

ACORPORATION OF. ILLINOIS.

DRAFT G AR.

: Ap plication ifiled September To all whom it my ma a.-

Be a known that I, WALTER H. COTTON,

acitizen of the UnitedStates, and resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Draft Gears, of d d p being seated, inthe released position of the which the following is a specification, and

which are illustrated in .the accompanying drawings, forming a part thereof gears for The invention, relates to draft railway cars-of the friction type.

Its objects are to secure simplicity of construction coupled with high efliciency,

and it' consists of a structure 'such as is hereinafter described, and isill'ustrated in the accompanying drawings, in which- Fig.1 is a central plan section of'the gear,

cer'tain'part's ofthe ca'rframe bein shown indetail;

V Fig. 2 is a plan View ofthe 'gear'as applied to acar, showing-the gear. compressed; the,

gear is shown partly in plan and partl'yfin central section; 1 p I Fig, 3 is a detail" side elevation of the gear and coupling,a partof'the gear being shown in central vertical section; and I Fig, 4; is asectional detail on the line 4-4:

I of Fig. 1.

There is represented} at 1() 10 aipai'r of center or draft sills of a railway car, each being provided with the usual draft lugs 11-11 and buifing lugs 12 12. f

Thebutt end of a coupler bar is shown at 13, and its extensio tail-strap or yoke 51 1314:-

The parts thus far mentioned are of any desired or ordinary construction and'form no part of the invention. j v

The improved draft gear comprisesa folllower 15, of the chambered type, having side walls 16, 17 and top andbottom walls 18,

Y '19; Opposed 'tolthe followenlo iis a plate follower 20. As the gear' is shown the follower 15 cooperates with. the'draft lugs 11, 11 and the follower 20 with the buffing lugs 12, 12. The relative positions of the two followers may however be reversed without affectingthe operation of the gear..

The inner face of the follower 20 "is fiat and against it are seated two substantially triangular wedge blocks 21, 22, the adjacent angles of the two blocks however being cut away to provide flat meeting faces for the rthe -plate 2 1.

formed on the top and bottom walls 18, 19, of the. follower 1-5, for limiting .theinwa rdf gears compress.

1, 19231' sci-mi No. e60, 501.'

' blocks when the gear is in normal or're gear, against a plate 24 which constitutes-a spring seat. vFriction blocks 25, 26 are seatedagainst the side walls 16,, 17, of the follower 15 and have inclined" faces eom' plernentary to and bearing against the outer faces of the wedge blocks 21, 22; In the released position of the-gear the outer ends of the blocks 25, 26, projectinto and to the I bottom of recesses 28, 29 formed in" the inner face of the follower 20.

The outer faces of the blocks 25, 26, bear against the sidewalls 16, 17, of thefollower 15,- and their inner'endsl bearupon the plate 24. Springs, shown as two-sets of nestedhelicals, 30, 31,. are interposed and react between the end-wall of'the follower 15 and Stop-shoulders 32',- 33, are

movement of the wedge block 23 as the distance from the bloek' 23 in .the normal position of'the gear, though if desired the block may be seatednormally against them.

Theshoulders 32, 33, may, as shown, con

v Preferably, as shown in Fig. '3,'fthe'se' shoulders are spaced a short st-itute; the ends of depressed portions of f .-the walls ,18, 19, which extend; to the end wall of the follower" 15. By this configuration ofthe walls'the shoulders are greatly strengthened f'and any tendency to break off that mightexist if stop lugs were used? is obviated.

When the wedge-block23 and the shoulw v .dei's 32, 33, are normally out of engagement, 1 all of the wedging and friction elements move together. until the parts named make contact, the resistance of the initial compression of the gear being only that afforded by the sprin s. I v p When the block 23 is in or comes into en gagement with the shoulders 32, 33, its

22, and the follower 20, and between the outer faces of the shoes 25, 26, and the side walls of the follower 15.

When the compressive stresses are relieved the parts return to normal position,

I as shown in Fig. 1, by reason of the expansion of the springs. The action is the same in both draft and bufling.

The. gear is easily assembled, is simple and v comparatively cheap of construction, no

machining of the parts being required.

While a preferred embodiment of the invention is disclosed, changes of detail may be made without departing from its scope. I claim as my invention: v 1. A draft gear comprising, in combina tion, a chambered follower, a plate follower, a pair of triangular wedge blocks seated against the plate follower, a pair of friction blocks engageable with the sidewalls of the chambered follower and having inclined faces engaging the wedge blocks, a wedge block interposed between the triangular blocks, spring means resisting longitudinal movement of the friction blocks, and stops limiting relative'movement faces engaging the outer faces of the triangular blocks, a wedge block interposed between the triangular blocks, and stops for limiting relative movement of the chambered follower and the last-named wedge block during the compressive movement of the gear.

3. A draft gear comprising in combination a chambered follower, aspring housed 7 within the chamber and reacting against its end wall, a plate forming a seat for the opposite end of the spring, an opposed follower, a pair of triangular wedge blocks slidably engaging the inner face of the op posed follower, a pair of friction blocks seated against the plate and side walls of the chambered follower and having inclined faces engaging the outer faces of the triangular blocks, a wedge block interposed between the triangular blocks, and stops for limiting relative movement of the chambered follower and the last-named wedge block, such stops being normally spaced from the blocks.

1. In a draft gear, in combination, a chambered follower having forwardly facing shoulders on two of its longitudinal walls, an opposed follower, -wedgin'g friction shoes engaging longitudinal walls of the chambered'follower, springs reacting between the shoes and the end wall'of the chambered follower, a pair of'triangular wedge-blocks slidably engaging the opposed follower and inclined faces'o f the shoes, and a wedge block loosely interposed between the triangular blocks and engageable with the forwardly directed shoulders.

5. A draft gear comprising, in combination, a chambered follower, a plate follower, a pair of triangular wedge blocks seated against the plate follower, a pair of friction blocks engageable with the side walls of the chambered follower and having in clined faces engaging the wedge .blocks,'a wedge. block interposed'between the triangular blocks, spring means resisting longitudinal movement of the friction blocks, and a positive seat carried by and extending across the chambered follower. for the' interposed wedge block.

'6, The combination in a draft gear of a chambered follower having forwardly facingshoulders near its inner end, an opposed plate follower, a air of triangular wedge-blocks seated against the plate folr, a Pair of friction blocks seated it against side walls of the chambered follower and having inclined faces. engaging" the triangular blocks, a wedge-block intere posed between the triangular blocks and engageable by the shoulders on the conipressive movement of the gear, and a spring'resisting longiudinal movement of the shoes into the chambered follower.

WALTER H. GOTTQN.

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