US286391A - Island - Google Patents

Description

(No Model.) 4 Sheets-Sheet 1.

J. A. COLEMAN.

MAGHINE POR MAKING HORSBSHOB NAILS.

No. 286,393.. Patented Dot. 9, 1883.

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(No Model.) 4 Sheets-Sheet 2.

. J. A. COLEMAN.

MAGHINE FOR MAKING HORSESHOE NAILS.

Patented Oct. 9, 1883.

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(N Model.) 4 sheets-sheet 3; J. A. COLEMAN. MACHINE FOR MAKNG HOR'SBSHOB NAILS. No. 286,391. Patented Got. 9, 1883.v

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4 Sheets-. Sheet 4.

(No Model.)

J. A. CGLEMAN. MAHINE FOR MAKING HORSBSHE NAILS. NO. 286,391. Patented 00's. 9, 188.3.

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um@ STATES PATENT trice..

`MACHINE-1 FVORMAKING HO-RSESHOENAILS.

SPECIFICAJFIONv forming part ofLetters Patent No. 286,391, dated October 9, 1883.

Application filed December 29, 18S?. (No model.)

To a/ZZ whom it may concern:

Be itknown that I, JOHN A. COLEMAN, of Providence, in the'county of Providence, and in the State of Rhode Island, have invented certain new and useful Improvements in Apparatus for the Manufacture of Nails; and I do hereby declare that the'following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and

to the letters of reference marked thereon, making a part of this specification.

This invention relates to certain improve ments in that class of machines for manufacturing nails, such as are used for fastening horseshoes, and other purposes, in which a series of operations are performed, which are as follows: A bar of iron rolled to a Width near-` ly equivalent to the length of the nails to be.

formed, and`provided at opposite edges With projecting ribs to furnish the additional metal required for the heads of the nails, is subjected to the action of a pair of punches, which' Y at each stroke separate from it a pair of blanks approximately the size of the nails, the blanks being punched with their heads alternately'in opposite directions. The punched blanks are then conducted to pairs of rollers engraved on their faces to the configuration of the nail, and the blanks in passing between the rollers, subject to strong pressure, are molded to the required form. Usually two pairs of rollers are employed, the first pair squeezing, drawing, and approximately shaping the nails, and the second pair, by further drawing and squeezing, bringing them to the desired form. Finally, the nails pass from the rollers and are pre` sented to linishingpunches, which press them through dies, so as to cut o protuberances of metal and trim the nails to their nished shape.

My invention has for its objects to provide a machine for performing these operations which shall becompact, simple, and effective, easily accessible for inspection or repair,and

' capable of being worked rapidly Without requiring skilled labor. One important feature of my invention is the' means whereby the blanks are unerringly conducted from each operating part to the next in order, and shaped and'iinished by pressing the flat sides successively between two sets of rollers. The abovementioned objects I attain by the means illusof portions of the machine, showing in detail the conduits which lead the nail-blanks from the punches to the first pair of shaping-rollers. Fig. 6 represents a transverse section of one of the rollers; Fig. 7, a plan view of the same. Figs. 8 and 9 represent views, partly in elevation and partly in section on vertical planes at right angles to each other, showing the means by which the blanks are conducted from the punches to the iirst pair of rollers, and from thence to the second pair of rollers. Figs. l0 and ll represent similar elevations, showing the means for presenting the rolled blanks to the finishing punches. Fig. 12 is a fveW, partly in diainetrical longitudinal scction and partly in side elevation, of the forming-roller; and Fig. 13, a detaily perspective 'view of the punch-slide and the mechanism for operating the pivoted conduit sides or lcvers t t. Y

The letter A indicates the frame of the ma chine, Which is'constructed of metal, and pref-Y v erably cast in one piece With suitable bearings kfor the shafts and working parts.

The letter B indicates the main or driving shaft of the machine, which may be driven by means of any suitable motor and intermediate gearing, a clutch-pulley, C', being employed in the present instance.

VThe letter D indicates a shaft, which is provided with an eccentric, E, for operating the punches, and a cam, E2, for Working the feedslide. The said shaft is also provided with a gear-Wheel, D,inter1neshin g with a gear-Wheel, B', on the driving-shaft, from which it receives its motion.

The lettersR and B2 indicate the first pair or shapingrollers, and R3 and It* the finishingrollers. rlhese are mounted on shafts suitably journaled in the frame, and are provided with similar pinions, R5, the pinions on the shafts of the rollers R and R3 intermeshing with an intermediate gear-Wheel, D3.

The letter I indicates a slide carrying two fingers, I2, pivoted at their tops to said slide,

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2 v ascesi v while forming the blanks and in the act of entering and rpassing through said bar. The backward and forwardmovements of the slide I are effected by alever, I3,linked to a springrod, I, which has at its end a friction-roller, I5, bearing against the cam E2, the cam causf ing the forward stroke of said feed-slide, and

the spring on the rod I4 causing its backward stroke. rIhe eccentric E operates a slide, P3, carrying two punches, I), which, asthey advance, pass through the iron bar I, punching and cutting from it a pair of blanks, N N2, and forcing them into .the dies I)l I, the blank Nl having its head downward and lthe blank N2 having its head upward, as clearly shown in Figs. 4 and 5 of the drawings.

The letter I,Fig. 2, indicates aspring-lever, which bears against the face of the bar I and' prevents it from being drawn back from the face of the die when the punches l? are with-- drawn. The blanks N N2, as they are forced successively through the dies, enter, the.respectiveconduits N3 N4, by which they are conducted in proper position to be presented l to the shaping-rollers R R2. VAsthe blank N has its headv downward, an obstruction, n', is provided, which engages its point, so that as it begins to descend the head will uniformly go first, as indicated in dot-ted lines in Fig. 4C. The blank N2, having its head up, has to be turned to bring it to proper position to be dropped, and to effect this 'an obstruction, a2, is prov ided ,which trips it'and causes it to fall head downward, as indicated in Fig. 5 of the drawings. In order to facilitate and accelerate the descent of the blanks through the conduits, a stream of lubrieating-fluid-such as soap solution-may be directed through thel conduits by means of the pipes O, leading from suitable supply tanks or reservoirs. To prevent the conduits from becoming closed by the blanks wedging themselves therein, the backs of the said conduits are hinged ata3 and a4, so that they will yield when subjected to undue pressure, and a bar or weight, S, is provided,

which is connected to any suitable gearing, by which an alarm may be given or the operation. of the machine stopped until the conduits may be relieved.

In some instancesthe bar I, from which the blanks are cut, instead of being symmetrical on both sides, as indicated by Figs. 4 and 5 of the drawings, is made with ribs on one side only, as shown in Fig. 8, and in this ease as the blanks Nl are overturned the prominenees lon their heads are on the sides opposite to the desired position; and in order to turn each `blank N2, so asl to corrcspondfto the blank N', a portion of the conduit below the part N4 is drawings.

constructed with a helical twist, N5,which hasl the effect of turning each blank, as it descends, half-way round, as indicated in Fig. 8 of the At the lower opening of each conduit, in the space between the two rollers It R2, there is' secured a light spring, s', which supports the blank until the proper moment comes for its entering between the rollers. At this time a cam projection, r', on the roller R moves a bent lever, r?, which has a slot, r4, engaging a f pin on a striker, r3, attached to the pivoted f arm r". @As the arm T5 moves downward it thrusts the lower end of the strikerr3 through a slot in the back of the conduit, and then causes it to descend on the point of the blank N2, so as to push the blank down past the spring s and rapidly into the space between the rollers, the said striker being withdrawn through the medium of a spring. The pair of blanks having passed through between the first pair of rollers, It R2, and being squeezed, drawn, and partly shaped thereby, enter the lower conduits, N6, by which they are conveyed to the lower pair of rollers, R3-

It, the arrest and feeding of the successive blanks being effected by means of aprojection, a, operating the bent lever, a', which. has a slot, a2, engaging a pin, a, on the arm a, to thrust the end of the striker a5 through a slot in the back ofthe conduit, the said striker being withdrawn through the medium of the spring a6, these devices being arranged to operate in a manner similar to the arresting and releasing devices operating in connection with the rollers R and R2, as above described.

The conduit-section N6 is provided with laterally-projecting lugs, which are bored to t a fixed rod, N", having a rigid collar, n", upon which collar is adapted to rest a suitable spring, n. The upper lug of the conduit rests upon said spring,whieh serves to support the conduit` and permit it to yield in the event of a blank leaving the rolls It R2 and not entering the-conduit truly. The lower lug on the conduit, by reason of its contact with the collar ri-prevents the conduit from crowding betweenl the rolls above mentioned. The section of the conduitN6 ts over the upper end of the next lower section.

The construction of the rollers is indicated in detail in Figs. 6, 7, and 12 of the drawings. Each roller is provided on opposite Ysides with steel dies fm, which are clamped between the faces vM and. M, the face M being so constructed as to spring slightly,when pressure is brought to bearupon it, by means of a screwnut and a collar interposed between the face M and the nut, the collar being adapted to bear against said face, near its periphery, so as to clamp the dies.

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From both of the faces e, on its inner wall, by which it is rendered of a yielding or flexible nature, and made to more readily bind against .the dies. The collar e, above alluded to, is hollowed out on its face,

so as to leavean annulus, f, which presses against the face M near its periphery.

In order to adjust the dies accurately, ra-

dially, wedgeshaped keys are provided withV oversetting anges mi and setiscrews, by which they -may be adjusted.

From the rollers R5* R* the nails which have been previously shaped, and which are left with iins or burrs near their ends, descend through the conduits (se'e Fig. l) to be subsequently subjected to'the act-ion oi' the finishing-punches Q. These punches are secured to a'slide, Q', which is operated by an arm, Q?, on a rock-shafa-QS, another arm, Qt, of which isiinked to the eccentric-rod Et, operated by an eccentric, E', on the shaftl). At the bottom of the conduits NT are located two side levers, t. When the said levers occupy the position indicated by the dotted lines in Fig. 1l, their respective upper ends in that position project into the conduits, so that the descending nails are stopped by them. As the punch-slide Qf advances it carries with it a tappetrod, t5, which is provided with two collars, the collar farthest from the punch striking the lower arm of the three-armed lever t*, causing the horizontal arm of the said lever t* to separate the lower ends of the levers #from the conduits, during which operation the springtrigger t drops over the upper arm /of the lever t", vby which the levers tare held away from the conduits until the punches have been withdrawn from the conduits, at which time the other or' inner collar on the tappetrod acts against the lower arm of the crank- 40 lever i, and through the pitman tl raises the trigger clear of the upper arm of the lever t, permitting the leverst to be drawn back to the conduits by the spring i?. The punches, during the operation above described, force the nails from the conduits and through the trimming-dies T, whence they pass away on an inclined chute, T. As the punches do not begin to act on the nails until they (the punches) have passed through the faee'of the 5o conduits, it follows that the chips or burrs which adhere to the same may be stripped therefrom by thev said' face on their returnstroke. The object in thus separating the leverst, and thereby removing sides and bottoms Aof the conduits, is to permit the burrs which adhere to the punches to drop therefrom and p down through t-he conduits.

Having thus described my invention, what I claim, and desire to secure by Letters Patent,

,SH i

l. In machines for makingI horseshoenails from a doubleiheaded ribbed plate, the combination of devices as' follows, to wit: a hori zontallyl-reciproeating plunger provided with two punches corresponding in shape to the i dies, meel'xanism to feed lthe nail-plate standing on its edge edgewise along and against the face of the die-plate, mechanism to operate the plunger and ^punches to cut out from the plate, the one a nail blank whose head is downward and formed of the rib on the lower edge ofthe plate, and the other a blank whose head is upward and formed of the rib on the upper edge of the plate, mechanism to cause all the' blanks to fall with their heads directed turn the blanks cut by one of the punches a. ially half-round during their progress along or through the conduit, in order to bring the heads of theseblanks into proper relation to the roller-dies, and swaging roller-dies to re ceive the blanks from the conduits and swage and give form to the nails, all combined for and operating as described.

2. In a machine for manufacturing nails, the

combination, with the dies and punches and their operating mechanism, of theA conduits provided with obstructions whereby one set of the blanks are prevented from tipping, and one set of blanks are tripped, and both sets of blanks are directed head downward intothe conduits in order to be properly presented to the shaping-rollers, substantially as speciiied. 3. The combination, in a nail-machine, with the conduits and the shaping and iinishing rollers, of the levers normally held by springs and operated by a projection on one of the rollers of each set, and the strikers having concaved seats forforeing the nails to the action of the rolls, substantially as described.

4. The combination, in a' nail-machine, of the lower conduit having a sliding action and a spring for holding and returning it to anormal position, whereby motion may be given to mechanism for stopping the machine in case the blanks wedge in the conduit, substantially the feeding-conduits and rollers with the arresting-spring and striker and its operating devices, whereby the blanks are fed, momentarily'arrested, and then advanced to the rollers, substantially as specified.

6. The combination, in a rnail-machine, of the lower conduits having opening sides and bottoms formed by pivoted levers, with the ICO finishing-punch and tappets and the threearmed and two-armed levers and triggers, whereby the said sides are operated to arrest and release the blanks in the conduit and to hold the same in readiness for the action of the punches, substantially as described.

7. The combination, in a nail-machine, of the shaping and nishing rolls with the feeding-conduits, one section of which is provided with a helical twist, and the remaining sections of both conduits straight, as distinguished from being twisted, whereby one set of blanks is properly presented to the rolls relatively with the blanks of the other set, substantially as described.

S. ln a-nail-machine, the shaping or itinishi 75 f downward into feed-conduits, mechanism to I ing rolls provided with die-clampin-g faces; and the inclined seats, and means for adjust- Inade integral with the roller-shaft', one of ing and securing the wedges to the roll-shaft, said faces being rigid and the other flexible, z whereby the dies are radially adjusted,\s ub and means for forcing the flexible face toward stantially'as described. y I 5 5 the rigid face, whereby the dies are held be-`1 In testimony whereof I affix my signature, in

tweensaid faces, substantially as described. presence of two Witnesses,l this 12th day of Dcy 9. In anail-n`1achine, the combination, with cember, 1882. 1

the shaping or finishing rolls having inclined f JOHN A. COLEMAN.

' die-seats kformed thereon and die clamping Witnesses:

1o faces, of the dies fitting between said faces, WM. ALEXANDER,

and the wedges interposed between the dies fH. A. TOULMIN.

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