US1805805A - Clevis for brakes - Google Patents

Description

May 19, 1931. P. QB. CAMP CLEVI S FOR BRAKES 'Original Filed Dec. 4, 1926 v 42 5 44- f I; 45

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TAGHMENT 00., A CORPORATION OF rumors CLEVIS r012. BRAKES Application lfiled 'Decem ber 4, 1926, Seria1No. 152,587. aene'wea March 5, 1931." f

This invention relates to brakemechanism and has for its principal object to provide a clevis that can be attached to .the small links of'standard brake chains, that will not interfere with or foul with otherparts in movement, andthat canbe produced economically.

Further objects and various advantages of the invention willbecome apparent as the disclosure proceeds and the description isread in connection with the accompanying drawings, in which v Fig. 1 is a diagrammatic view illustrating uses of the improved clevis in connection with a well known hand brake; I

' Fig. 2 is an enlarged side elevation of the clevis in a form suitable for connecting a brake chain to a push rod; a

Fig. 3 is a longitudinal section taken-onthe carried by hand-brake rod 15', the opposite end of which isconnectedzwith the pushrod 16 of a brake cylinder'l'? by another chain18.

I The push rod 16 is also connected with a cylinder lever 19 of thefoundation'brake gear.

In such an organization the improved clevis, generally indicated by 20, is useful in three places; first, connecting thechain 18 -with the push'rod or foundation brake gear;

' second, in connectingthe chain18 withthe hand brake rod' 15 and, third, in connecting the dead end of the chain 11 with the brake shaft step 12.

The clevises now in common use include a Y U-shaped portion provided with large eyes which receive a cross-pin. The eyes are too large to pass through the small links of standard chain used in brake mechanisms and, in consequence, it has been'necessary to equip such chains with extra and specially made links. U Y

plate 21 perforated adjacent each end, as in dicated at 22 and23, an-opposed plate 24 carrying a pin 25 passing through'the push rod 16and'theperforation 22, and a pin 26 pass-j ing through a link inthe chain .18 andthe perforation 23. I I

The plate 24 isjbeveled adjacent its ends, as-indicated at 27 and is reenforced between itsends by a tapering rib 28, the outer edge of which cooperates with the beveled ends to. give the outer face of the plate a generally curved form calculated to slide over rather than foul against any part of the carduring relative movement of the clevis" and such end in Fig. 3 is made fiat to correspond with theopposed surface of the'push rod 16. Ad-

j acent to the opposite end it is provided with The 1.111;... face an... plate 24' at the ita 3 a fillet 29 for reenforcing the pin 26. The

3 pin 25 will ordinarily be made to correspond in size with .the standard perforations in I push rods, cylinder. levers, and the like, so that the clevis may be readily substituted .for

the clevis now in service, and the pin'y25 may be received in the holes which ordinarily receive the p n in the conventional clevis.

.Thepin 26 is relatively small as comparedto' the pin 25 and may be passed through a link of the standard brake chain. At itsfree end it is provided with a ShOuld6I '30 adapted to bear against the outer face ofthe plate-21, at 31, the perforation being made, .asufiiciently large tojpermit it with its shoulder to be passed through in. assembling. I

The plate 21 is also bevel. dat its ends, in-

dicatedby' 32 and'33 and the pins25 and 2f6 I are rounded or beveledmat'84and 35 to present surfaces thatwill tend to slide rather than .catch,'-as explained in connection with the-other plate 24. j i v ,The-le'ft. end ofjthe plate-21 is enlarged lat erally,as shown in Figs-2 and 4, and oneach side of the perforation 22 it is provided -with' outwardly projecting flanges 36 which are perforated inalignment with the perfo ration in the pin 25 toreceive, a'cotter key 37.

The inner ends of these flanges are beveled was. I.

thereby limit the claims or require them to The intermediate portion of the plate 21 at its outer side is provided with a depression 39 extending from the outer wall of the perforation 23 to a point adjacent to the inner wall of the perforation 22.

The distance between the remote sides of the pins 25 and 26 is approximately equal to the distance between the remote sides of the perforations 22 and. 23. In assembling, the pin 26 is passed through the'perforation 23 by a movement at a slight angle to the axis of that perforation. This will bring the rounded or beveled end of the pin '25 against the remote wall of the perforation 22 at the inner face of the plate. A blow of a hammer, or the like, will spring the parts sufficient to permit them to take'the position shown in Fig. 3 in which the shoulder 30 hearing against the outer face of the plate 21,

and theouter wall of the pin 25 hearing against the corresponding wall of the opening 22, hold the parts against displacement. The cotter pin 37 is used as a precaution to insure that the clevis will remain fast even if distorted, or if manufacturing tolerances have so accumulated asto prevent the preferred binding action described. The outer wall ll) of the perforation 23 is fiat and the corresponding wall of the pin 26 is also flat.

In the modified construction shown in Fig. 5, the plates 121 and 122, corresponding to plates 21 and 2%, are offset between their ends to dispose "theends 42 and 43 wide enough apart to accommodate the jaw 4-4 on the push rod 45, which jaw receives the cylinder lever 46. The pin 47 serves to secure both the cylinder lever andthe clevis to the jaw 44. Both the plates 121 and 122 are reenforced by sloping ribs 48. Y r

Because this clevis can be applied directly to the small links used in standard brake chains, such chains can be made by merely cutting the proper length from stock and there is no need of the expensive operation of forging a large link on one or both ends. The clevis is of small lateral dimensions only slightly exceeding the dimensions of the chain and is provided with surfaces that tend to slide over rather than engage other parts. The cross-sectional area of each of these plates is such that the plate cannot beinserted through the end link of the chain while the adjacent link is engage'd therein. The clevis can be made by casting and at much less cost than the forged clevises now in common use.

I have made use of specific description and illustration in order that the invention might be fully understood, but I do not intend to be interpreted more narrowly than is made necessary by the prior art.

I claim as my invention: 1. A clevis for connecting a small link of a railway brake chain with an end of a brake carried by said plate and extending at'substantially right angles thereto for extending through said device, a second pin also extending at approximately right angles to said plate for, extending through said link of the chain, a second plate having perforations to receive said pin, said second plate adapted to he flat against said device and means on the pins for holding said second plate in parallel relation to said chain link, said plates being provided with reinforcing flanges extending longitudinally thereof. v

2. In a brake operating mechanism comprising a chain and an element to which the chain is secured, a clevis comprising a pair of plates, one of which is perforated adjacent to each end, a relatively .1 small comparatively straight pin on the other plate for projecting through a link of the chain and through one of the perforations and having a shoulder beyond said perforated plate, a relatively large comparatively straight pin projecting through the element to which the clevis is to be secured, through the other perforation in the perforated plate and holding the shoulder on the small pin in position to bear on the outer side of the perforated-plate permitting the assemblage of the parts although the greatest .cross sectional dimension of each of said plates is such that neither plate can be inserted in' the end link of said chain while the adjacent link is engaged therein.

3. In a brake operating mechanism comprising a conventional brake chain and an element to which the chain is secured, a clevis for the end link of said chain, said clevis comprising a plate having a comparatively large pin extending outwardly from one end of said plate for engaging said element and a comparatively small pin extending outwardly from the other end of said plate for extending through an end link of said chain, a secserted through an end link of said chain while the adjacent link is engaged therein.

In testimony whereof I aifix my signature. PERCY B. CAMP.

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