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Publication numberUS256755 A
Publication typeGrant
Publication dateApr 18, 1882
Publication numberUS 256755 A, US 256755A, US-A-256755, US256755 A, US256755A
InventorsDavid F. Spangles
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 256755 A
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Description  (OCR text may contain errors)

UNITE rates Arenr rrrcn.


SPECIFICATION forming part of Letters Patent No. 256,755, dated April 18, 1882.

' Application filed Decemberfil, 1831. (Model.)

To all whom it may concern Be it known that I, DAVID F. SPANGLER, a citizen of the United States, residing at Dayton, in the county of Columbia and Washington Territory, have invented certain new and useful Improvements ilrswiveled Links for Chains; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to theaccompanyingdrawings, andtoletters or figures of reference marked thereon, which form a part of this specification.

This invention relates to improvements in swivel-links generally, and is particularly applicable to those chains employed in logging.

It is desirable in logging to have a swiveled link that will securely connect the sections when hauling and at the same time will readily nneouple in emergencies, such as when the log starts to roll down a hill, as will be hereinafter described.

My invention consists in alink composed of ayoke provided with across-bar, through which is formed an elongated opening or slot, and a detachable eye having a suitablyrformed arrow-head, which is thrust through the elongated slot and then turned so as to lock it in the yoke, and a spring placed within and held by the yoke and arranged to close against or near to thehead of the detachable eye and prevent the removal of the latter, except under severe strain, as will behereinafter fully set forth.

In the accompanying drawings, Figures 1 and 2 show side and edge views of the yoke with the detachable eye attached thereto, Fig. 2 being slightly broken to show the arrow-head. Fig. 3 is a vertical section. Fig. 4 is aview of the spring. Fig. 5 shows a side and edge view of the detachable eye with its shank and arrow-head. In Figs. 1 and 3 I show in dotted lines a modification whereby I employ two springs.

to is thelink,having a head-piece, a, through which is formed an elongated opening, a. This opening leads from the end of link through the head-pieceinto the hollow of the link, as shown.

bis a U-shaped spring, placed within the link a with sufficient space between its upper end and the lower side of the top of the said i link to permit the adjoining link, a, to be inserted. This spring-bar has its side arms, bb, projected down ward and terminated within the opening a through the head-piece a ot'linka.

b are cars formed on the side arms, I), near their upper ends, and arranged in position to embrace the sides of the link and secure the spring in position.

0 is the detachable eye, constructed with a shank, c, and an arrow-head, 0 The arrowhead is thrust through the slot in the cross-bar a, and is then turned so as to bring its wings at a right angle to the said slot and across the inner edges of said cross-bar, as shown in Fig. 2, thus locking the yoke and eye together.

0 is a shank projeeted'from one end of link 0, and it is of samelength as or slightly longer than the head-piece a of link a. On the end of this shank c is formed a fluke or arrowhead, c", which is made nearly as wide as the length of the elongated opening a of link a. The edges of this arrow-head or fluke are rounded, so that it will force the arms of spring I) back when the link 0 is turned, as will be hereinafter described.

In dotted lines, Figs. 1 and 3,1 show a modification in the manner of arranging the spring. Instead of having the spring formed U-shaped and extended from above downward,with one of its side arms on each side of the arrow-head, there may be provided two spring-bars with their lower ends fixed to lower side of headpiece c and extended up in each end of the opening, with their tops inclined toward each other, as shown. I prefer, however, the construction shown in full lines.

In the operation of my invention the fluke is placed in the opening through the head a and pushed up between the arms of spring till it passes the top of head-piece and turned, and the fluke will rest on the side of top ofthe headpiece a, as shown in Figs. 1 and 2. In this position it is ready to stand any heavy steady place, as the springs on either side of the arrow-head prevent its turning far enough to bring the flukes in line with the elongated opening through the head-piece, except under extraordinary twisting strain, as will be described. In starting or hauling a log on a hillside the log will often roll, and when the team ishitched pulling, and no slightjar would throw it out of thereto in the'ordinary manner will drag the team downhill, killing or niaiming the animals, and oftentimes the chainis badly broken, causing serious inconvenience and expense of re pairing the same; but in my device, if the log rolls one way or another, the link 0 will be turned and the flukes will force the arms ofspring, and the arrow-head will come in line with and escape through the opening in the head-piece, and the log will be separated from the team, and when the log stops rolling the teamster can hitch to the log and continue as before.

Having thus described myinvention, what I claim", and desire to secure by Letters Patent,

1. A swivel-link composed of a yoke provided with a head-piece through which is formed an elongated opening, a detachable eye having an arrow-head or like construction presence of two adapted to be passed up through the elongated opening in the head-piece of yoke, and an in dependent spring arranged within the yoke and adapted to close against or near to the arrowhead of the detachable eye and prevent the same from turning, substantially as set forth. 2. The combination, with the yoke of a swivel-link, of the U-spring b, provided with lips orjaws on its opposite arms, adapted to grasp the sides of the yoke, and having its ends extended to and arranged to close against or near to the arrow-head of the detachable eye, substantially as set forth.

In testimony whereof I affix my signature in witnesses.



Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2509598 *May 10, 1949May 30, 1950Hart Andrew PTension-released coupling
US4184232 *May 15, 1978Jan 22, 1980Andre MarosyCoupling
US4236283 *Nov 27, 1978Dec 2, 1980Andre MarosyCoupling
US4716635 *Jun 11, 1982Jan 5, 1988Flocchini Andrew JMechanical fuse
EP2221505A1 *Jun 18, 2009Aug 25, 2010Benzi & Di Terlizzi s.r.l.Programmed release retaining device for the element protecting the cardanic transmission joint between a tractor and a towed machine
Cooperative ClassificationF16G15/10, F16G15/04, F16G15/08, Y10S24/60
European ClassificationF16G15/10, F16G15/04, F16G15/08