US282536A - Benjamin a - Google Patents

Description

(No Model.)

` B. A. LEGG.

GRAIN. No. 282,536; Patented Aug. 7, 188s.

UMTED STATES BENJAMIN A. LEGG, OF COLUMBUS, OHIO, ASSIGNOETO JOSEPH A. JEFFREY,

FATMFICE p VOF SAME rLAcE.

CHAIN.

SPECIFICATION forming part of 'Letters Patent No. 282,536, dated August '7, 1883.

Application led December 11, 1882. (No model.)

.To all whom, it cm/ concern,.-

-Be it known that I, BENJAMIN A. LEGG, a citizen of the United States, residing at Colnmbu's,4`in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Chains, of which the following is a specification, reference being `had therein to the accompanying drawings.

Figure 1 is a plan View of my improved chain. Fig. `2 is a side View, two of the links being'in position to be detached. Fig. 3 is a' transversesection on line x 1, Fig. l. Fig. 4"

is a detached view of the connecting spindle or pin, and Fig. 5 is a detached view in perspective of oneof theside bars.

The invention has for its object the construction of a detachable driving -chain in such .manner that the parts may be readily connected with each other and disconnected when placed in certain arbitrarily-selected positions.

In the drawings, A a B represent one of theside bars, the part a constituting an angular shank, which connects the parts A B with each other, and may occupy an inclined position relative to'the parts A B, as shown; or the bar may be constructed with a right-angled shoulder at this point, either construction subservtion, D, of which is round in cross-section, the

endsd cl being squared in crosssection, or,

` when preferred, they may be made with three Hat sides, two of which are at right angles to the third, the fourth side being circular, and by preference of the same curve as the part D.

e e are circular flanges upon the outerends of the parts d d, and preferably of the same diameter as the central part D.

Ev E is-an anti-friction roller.-

By an examination of' the drawings it will be readily understood that the chain may be put together in the following manner: Place the inner ends of two of the tubular parts Z1 b in contact with each other and thrust tlie spin dle D through them. Then slip the circular part C of the keyhole-'shaped opening over the flanged end e of the spindle, the barthus added being held at a right angleto the other pair of bars. Next move this newly-added bar longitudinally until the squared part d is drawn into the angular portion c of the key-l hole shaped opening. Another side bar' is then applied in -like manner to the opposite end of the spindle, after which this newly-added pair of side bars may be swung into line with the first-named pair7 the operation being continued until a chain of the desired length is formed.

Upon an inspection of Fig. l it will be readily understood that while the links are in substantially the position there shown the engagement of the parts a a with the opposing ends of the parts A A retain the squared ends d d of the spindles in the angular portions c'c of the key-hole-shaped openings, and hence the ends A A cannot spread apart or slip off from the parts d d by reason of the flanges e e.

When it is desired to use anti-friction rollers E E, they must be placed upon the tubular eX- tensions Z1 b/ before the spindles are thrust through said parts b b.

The webs f f serve not only to strengthenthe side bars, but also to form guides adapted to engage with opposite sides of the sprocketwheel spurs., and thnsinsure that the chain shall run steadily, and that the anti-friction rollers or the tubular extension b b shall properly engage with the working-faces ofthe teeth.

I do not wish to be limited to forming a tubu- -lar projection, b, upon the-inner faces of both of the side bars, which are placed next to the part D of the spindle, because' the tubular eX-` tension upon one side bar of the pair might be Imade as long as the anti-friction roller is wide,

the other side bar of the pair being provided with a round hole or seat corresponding in diameter to the portion of the spindle.

By making the side bars separable, as above indicated, whether `the tubular` portion be formed in two parts or be formed wholly in the same piece with one of the side bars, I se cure some very important advantages. Again, I am enabled to mount an anti-friction roller upon the tubular end bar of each and every link in the chain. Another difference in op.- eration between my chain and any preceding IOO one of which` I have knowledge is this: In my l lateral projections, said pintle being seated in therefor at the ends of the pintle, it would be possible in ordinary use for the divided tubuthe tubular end bar and the key-hole shaped openings and operating to retain the tubular bearing and the separable side bars in close Contact, substantially as set forth. i

2. In a drive-chain, the combination of thev separable side bars, each having a key-holeshaped opening in ,one end and the separable tubular bearing in the other, with the antifriction roller, and the pintle provided' at its ends with lateral proj eetions, and operating as a pivotal connection for the links, and also to retain the tubular bearing, the separable side bars, and the v anti-friction roller in proper working relation, substantially as set forth.

In testimony whereof I affix my signature in presence of two witnesses.`

BENJAMIN A. LEGG. Witnesses:

JOHN M. TIBBETTs, WM. BELL, Jr.

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