US1237757A - Draft-gear. - Google Patents

Description

l. F. COURSON.

DRAFT GEAR.

APPLICATION FILED DEC. I8. 1916.

Patented Aug.

i JOHN F. COURSON, PITCAIRN, PENNSYLVANIA.

' DRAFT-GEAR.

mamar.

To aZZ'tUwm t may concern.'

Beitknown that I, Jon-N F. CoURsoN, a citizen of theUnited States, residing at 124 Third street, Pitcairn, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Draft-Gears, `of which the following is a specification. 1 e

My invention is an improvement in draft gears,v and is designed'to provide for absorption of the shocks of bufling andv pulling strains by means of an annular spring. Such spring is `so mounted within` a suitable framework as to be elongated in "oneor the other of two opposite directions whereby the sides ofthe springare changed in position in a direction Opposite to their resilient tendency and with asteadily increasing resistance proportioned to the strain, effecting .a

'resulting reactionv and desirable.' resistance.

y the gear in compression,due to bufling.`

Fig. 5 is a detail annular spring.

perspective view of the Fig. 6l is a similar view of the drawbai" shackle frame. l Fig. 7 is a similar view of one yof the key bearing ca ps.`

Fig. S is a detail view, partly broken away,

showing a modified construction utilizing a supplemental spring. f

In the drawings, 2 represents the drawbar of a coupler connected with the front end portions of a double-sided shackle frame 3 by a transverse bolt -or key 4 engaging holes 5 thereof. The sides of frame 3 are connected by a cross bar 'against which bears the rear end of drawbar 2 and the frame is mounted between the center sills 7, 7, upon transverse keys or bolts 8, 9, which in turn eXtend by their endsthrough slots 10, 10, and 11, 11, of the center sills. Slots 1.0 and 11 extend forwardly and backwardly beyond intervening i'einforced `bearing portions 12 of the center' sills against which keys f Specification of Letters Patent.

position, indi-` of 'the Spring patenten aug. ai, reir;

Application inea December is, 1916; serial N. 137,496.

and`9 bear,and' which resists key 8A in ing and key 9 in pulling under the strain of the annular spring in onedirection oi' the other. Shackle frame 3 is likewise provided with slots 13, 13, and la, la, which extend forwardly and backwardly beyond interveningbearing portions 15, 15, which also engage keys 8 and 9, pullingkey S forwardly in pulling and pushing key 9 rearwardly in buliing. As will be seen slots l0, 11, 13 and 14 ai'e of ample length to `provide clearance i for fullinovement of the keys.`

lThe active shock absorbing element ofthe geai' is an annular' springl of one or `more continuous bands of suitable resilient metal,

as steel, and which is preferably of oval form, as shown in Figs. 1, l .and 5. Said spring embraces keys S and 9 the keysfprefei'ably having U-shaped" beai'ing thimbles or shoes 17 surrounding their outer edges `as sl'iown, andprovi'ding ample beai'ing surface for the spring at each inner end portion.

If desired, a supplemental compression spring 18 maybe inserted between the oppositel sides'of spring 1G as in Fig. 8,` so as to reinforce it and supplement its resistance against collapsing' strains.

' In action, bearings 15 of frame 3 thrust key 9 backwardly inbufling, key 8 remaining stationary as resisted by 4bearings 12 and providing a stop .for` the front loop of spring` 16.' Backward' movement of key 9 tendsto elongate the spring .as in Fig. 4:. bringing its sides `toward each other,` and with a counteractiiigresistance which `increases ,with the` strain of bufling. In the same mannerbearings 15 thrust key ,Sforwardly'in pulling,

key 9' remaining stationary against bearings 12 and providing .a `stop for the rear ,loop which is elongated in the same manner with corresponding resistance. In either movement the action is the saine, and with either the annular spring alone, or reinforced as inv F ig. 8, the resistance to either builing or pulling sti'ains is very great, espel cially as the sides of the spring approach parallelism. "D

The construction and operation of the gear will be readily understood from the foregoing description, and it will be found to provide a simple, economical and highly efficient. means for exerting great resistance.

lVhat I claim is:

1. A draft gear consistingof a slotted frame adapted to be connected toa drawbar or the like, abutinents external of the frame,

keys extending through the slotted frame and engaging said abutments, and a spring embracing said keys.

2. In combination with iixed abutments, a e

longitudinally movable trame provided with bearing portions between clearance open-- ings, a pair of transversekeys extending at each side of lsaid bearing portions through said openings and adapted to engagesaid abutments, and an'annularspring embracing said keys.` Y' i 3. In combination with center sills having bearing abutmentsbetween front` and rear clearance openings, a draw bar, a Ytrame connected with the draw bar and having bearing portions between front and rear clearance openings, a pair of transverse keys extending through all ot said clearance openings'and engaging said bearing portions and abutments y respectively, and an annular springembracing said keys between the sides y of said trame.

` 4L. In combination with center sills having bearing abutments between front and rear clearance openings, a draw bar, a double sided ramefconnected with the draw bar and having bearing portions between front and rear clearance openings, a pair of transverse keys extending through all of said clearance openings and engaging said bearing portions and abu'tments respectively, and

an annular spring embracing said keys be? tween .the sides of said frame. l

5.l In combination with center sills having bearing abutments between front and rear clearance openings, a ydraw bar, a double sided .frame connected with the draw bar and having bearing portions between front andrear clearancel openings, a pairot transverse keys extendingthrough all" of said clearance openings rand engaging saidbear ing portions and vabutments respectively,

' bearing thimbles on the outer middle portions of said keys, and an annular spring embracing said `,keys and thimbles `between the sides of said frame.

6. In combination with center sills having bearing abutments between front and rear clearance openings, a draw bar, a double sided trame connected with the draw bar and having bearing portions between front and rear clearance openings, a pair ot transverse keys extending through all of said clearance openings and engaging said bearing portions ancl abutments respectively, an annular spring embracing said keys between thesides of said frame, and a supplemental compression spring between the opposite sides of said annular spring.

7. Inl a (rear, a pair of separable keys, in tervening bearings therefor, means for moving one key away from the other, and an annular spring embracing said keys.

8. In a gear, a pair of separable keys, intervening bearings therefor', a frame engag ing the inner portion of each of said keys and operable to move one away trom the other, and an annular spring embracing said keys. c 9. In a gear, a pair of separable keys, intervening bearings therefor, a drawbar, a frame connected to the drawbar engaging the inner portion of each of said keys and operable to move one away from the other, and an annular spring embracing said keys.

10. In a gear, a continuous annular spring, a pair of separable tension exerting members extending through the spring, intervening resisting abutments -for said members, and means tor moving one of said members away from the other to exert tension on the spring.

11. In a gear, a continuous annular spring, a pair of separable tension exerting members extending through the spring, intervening resisting abutments Jfor said members, a drawbar, and a frame connected to the drawbar having portions engaging between said membersv :tor `moving one away from the other to exert tension on the spring.

` In testimony whereof I hereunto aiix my signature. l

JOHN F. COURSON.

l Copiesfof this patent'may be obtained for ve cents each, by addressing the Commissioner of Patent.

Washington, D. C.

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