US1712248A - Composite pintle for conveyer links - Google Patents

Description

May 7, 1929. c. c. BRAYTON COMPOSITE PINTLE FOR CONVEYER LINKS Filed Aug. 19. 1926 Patentedl May 7, 1929i,

1,712,248 PATENT oFFlc'Er 'COBEY C. BRAYTON, 0F OAKLAND, CALIFORNIA, ASSIGNOB T0 AMERICAN MANGA-A NESE STEEL COMPANY, F CHICAGO, ILLINOIS, A CORPORATION 0F MAINE.

COMPOSITE PINTLE ron CoNvEYER LINKS'.

Application led August 19, 1926. Serial No. 130,145;

This invention relates to pintles for join-` ing together links of conveyer chalns and the like, and particularly links of frame-llke construction, comprising a barrel at one end and arms extending from the barrel and spaced at their outer ends appropriately to lap upon the ends of the barrel of the next adjacent link.

By U. S. Patent No. 1,517,482, issued Delo cember 2, 1924, to American- ManganeseSteel Company, upon the invention of Donald H. Young, it was proposedl to provide a compos. ite pintle joint for uniting the overlapping side arms of one frame-like link to the barrel of an adjacent link by inserting a single tubular pintle member through all of the overlapping link members until the insert ed end was exposed at one side, and a nonrotating seating head integral with the following en d of the hollow pintle brought up against the other side o the chain, and then introduce a rivet in the direction opposite that in which the tubular pintle was inl"serted', until the 'inserted end of they rivet projected beyond the integral seating head of the tubular pintle, and an integral head upon the following end of the rivet brought up against the exposed inserted end of the tubular member and overlapped the surround ing portionof the link, and thereafter upset the inserted end of the rivet to permanently complete the assembly. But in such pintle joints, it is necessary to use a tubular pintle member having a length equal tothe full i width of the chain, and to provide a cored openingentirely through the chain, and,

when assembled, the length of the tubular pintle becomes the measure of tightness with which'the links can be bound through means 4o of the rivet, not only in the original assembly but in any replacement after the parts become more or less worn.

It lhas also been pro osed to articulate framed chain links by apping the spaced ends of one link outside of the ends ofa transverse strut-like barrel integral with' the other link, and inserting conical studs throu h the?v outside link' ends and into nonrotatale bearing and axial abutment with 5o the, cored ends of the barrel; but the axial *abutment of the conical studs against'the ,rigid strut provided by the barrel, which needed no lateral sustention, left the outer lapped ends of the connected link free from the lateral confinement which the present inf,l

.ventiong moreover, it involved the complicaadmits of using the same tubular pintleimemv ention provides and transferred the rotational bearing to the relatively thin lapped llink ends instead of to the elongated surfaces of inserted sleeves as in the present ini tion of additional parts such as a second pair lof conical studs entering the articulating studs. It has also been proposed to articulate spaced link ends lapped outside of strutted link ends and united therewith by a single piece pintle, itted at itsj'respective ends in the strut or barrel, aridi-confined in its axial displacement by separately formed heads secured to the ends of' the pintle by transverse pins passing through each head and the pintle and embracing thev lapped outer link ends to resist rotation of the lpintle therein; but in such proposal, the non-rotation of the spindle depended upon the application of separately7 formed heads, as distinguished from heads integral with two separately formed andfaxially adjustable pintle sleeves, and the transverse pins used to hold the parts in assembly are not comparable with the setting up of a rivet head on the spindle in its effect upon the tightening of the parts.. l v The present invention improves the construction of composite pintles, especially for chains of considerable width, where -a long transverse barrel is present, in that itin volvesvery much less work in finishing the' bore through the transverse barrel, which is an important item when the links are of cast manganese steel that can be finished only by grinding; it permits the use of an originallyv formed integral seating head at both ends of the tubular portion oi `the pintle instead of only one end-thereof; it

bers with chains of different width; it provides means for developing a variable length tie rod, the ends of which `are provided by headed pintle sleeves -`seated firmly and nonrotatably against the outside link ends while their cylindrical' portions, being freely movable in the vdirection of the-axis of articulation in the strutting barreljof the inside link, permit the outside -linkjends to be brought into'. firm lateral bearing with the inside link and provide elongated-*cylindrical turning bearin s;'the parte being held in such assembly y means of a rivet that can be set up to' any desirable degree for maining fit after the parts become Worn; in other words, the present invention admits of assembling the tubular members and securing rivet with such degree of tightness or limitation of lostmotion as will suit the particular joint being formed, both in original assembly and in case of replacement; and it involves other advantages.

The resent invention proceeds upon the princip e of introducing two independent cylindrical sleeve members from opposite sides of the chain until each is arrested by its own integral head finding non-rotatable seating against thev outside lapped member on its own side of' the chain, and having these independent sleeve members extend inwardly, into rotary bearing with but without axial abutment against the strut-like barrel, but only fora relatiyely short distance, or just suiicient to keep them normal to the longitudinal axis of the chain, thus necessitating finishing of only the two end portions of the cored bore and the eyes of the adjacent link lapping thereon, and leaving the intermediate ortion of the cored bore available for pac ing with lubricant; these inserted tubular pintle ymembers being thus made to provide a suitable size of confining head for both of the relatively thin lapped side bars of the adjacent link andbeing secured, and the degree of pressure of their seated heads against vthe lapped ends of the ylink being selectediby upsetting to an appropriate degree the protruding end of a rivet which passes entirely through both tubular pintle members from side to side of the chain.

In the accompan ing drawing- Figure 1 is a p an view of several links of a chain articulated through means of composite pintles embodying the subjectmatter of the present invention, a portion of one joint being in section.

Figure 2 is a side elevation of the same.

Figure 3 is a transverse section on the line 3"--3x of Figures 1 and 2; and

Figure 4 is a detail View of one of the tubular. pintle members.

1 represents the barrel member, and 2 the side arms projecting therefrom forming a frame-.like cast manganese steel link, a number.of which are articulated to provide a conveyer chain,'and in the articulation of which the ends of the side bars 2 of one link overlap and are pivotally secured at the ends of the barrel of an adjacent link by means of pintles passing through the hub portions 3 .on the side arms and the intervening barrel. Y' r In pivotally uniting parts a's stated, the present inventionprovides tubular pintle members 4 inserted from the respective sides through the hub portions 3, andinto the end portions of the intervening barrel 1, for such distance as will secure said pintle portions against deflection from theaxis of hinging movement; and each tubular pintle member is provided with its own integral seating head 5 that` overlaps and becomes the bearing portion in confinement of the hub portion 3 which it secures, the said head 5 bemg preferably confined against turning by means of flanges 6, integral with hub portion 3, as is usual in the articulation of chain links. To confine the tubular members 4 in the positions described, a continuous rivet 7 having .integral heads 8 seating1 against the non-rotating ends 5 of the tubullar members is employed, one of the heads 8 being formed in situ by upsetting the protruding end of the rivet.

I claim:

In combination with chain links, comprising a barrel member on one link overlapped at its ends by spaced ends on another link, theI herein described composite pintle consisting of separate pintle sleeves extending inwardly from the respective "sides of the chain, each through a lapped link end, and into the adjacent ends of the barrel member, and a rivet extending through all of said parts and having heads seated against the respective sleeves; each of said sleeves beink constructed with an integral head througli which it seats, under confinement of the single through rivet non-rotatably against the link end through whichA it passes; each sleeve having a cylindrical portlon'entering into rotary earing within the barrel member but without axial abutment thereagainst; and the lapped ends bein held by the rivet.through' the medium of t 1e sleeveheads against spreading underflateral bearing of the inside link. j A

Signed at Oakland,jCalifornia, this 28th day of July, 1926.

coaiaY c. BRAYToN.

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