US319875A - Shoe-nailing machine - Google Patents

Description

(No Model.) 7 4 Sheets-Sheet l H. S. BACON.

, SHOE NAILING MACHINE.

No. 319,875. Patented June 9, 1885.

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SHOE NAILING MACHINE. No. 319,875. Patented June 9, 1885.

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(-No Model.) 4 Sheets-Sheet 3. H. S. BACON. SHOE NAILING MACHINE.

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4 Sheets Sheet 4.

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H. S. BACON. SHOE NAILING MACHINE.

WA! Win ,4. 5 m i UNITED STATES FFICEO PATENT HENRY S. BACON, OF MILFORD, ASSIGNOR TO THE AMERICAN METALLIC FASTENING ASSOCIATION, OF BOSTON, MASSACHUSETTS.

SHOE-NAILING lVIACHlNE.

SPECIFICATION forming part of Letters Patent No. 319,875, dated June 9, 1885.

Application tiled December 8, 1884. (No model.)

To aZZ whom it may concern.-

Be it known that I, HENRY S. BACON, a citizen of the United States, residing at Milford, in the county of Worcester and State of Massachusetts, have invented certain new and useful Improvements in Shoe Nailing Machines; and I do hereby declare that the same are fully described in the following specification and illustrated in the accompanying 1o drawings.

The object of this invention is to improve shoe-nailing machines in various respects, so as to facilitate the manufacture of shoes and economize in the item of labor in their production. My invention relates to that class of shoe-nailing machines 'in which a continuous wire or equivalent fastening means is automatically fed forward, cut off and pointed, inserted in the shoe, and secured therein.

My invention embraces new means of securing the horn or anvil firmly while the awl is being inserted and the nail driven, and of releasing such horn, so that it may yield downwardly during other parts of the operation.

My invention also includes a pair of tapered dovetail gibs and flanged adj Listing-screws to adjust them, to provide for wear by the sliding of the head and the action of the awl and driver. It also embraces a new combination of devices for effecting and regulating the feed of the wire.

In the drawings, Figure 1 is a front view of the upper part of my improvedmachine, and Fig. 2 is a rear view thereof, with the pulleys 3 5 and fly-wheel cut away. Fig. 3 is a side view of the machine, showing the position of the horn; and Figs. 4 and 5, details of the devices for securing the horn at the proper time. Fig. 6 is an enlarged vertical section and elevation of part of the head of the machine. Fig. 7 shows the front face of the head with the awl and driver raised. Fig. 8 is avertical section of the foot of the machine, showing the treadle' pulleys O and fly-wheel D.

Figs. 13 and 14 illustrate the double tapered 5o dovetail gibs on which the headslides. Fig. 15 shows part of the wire-feeding mechanism; Fig. 16, details of the cutting devices, and Fig. 17 the relation of the cutters to the carrier.

A is the body or standard of the machine, formed with an offset about midway of its height, so as to throw the support of the head out of line with the axis of the horn.

B is the driving-shaft mounted horizontally in bearings and furnished with tight and loose (See Fig. 3.)

The horn or anvil E is of the usual bent and tapering form, and is mounted in a base block or bracket, F, which revolves upon a vertical shaft, G, located in the lowerhalf of the standard A. This shaft has the usual spring, H, surrounding it to give support to the horn, and is provided with thepivoted trcadle I to depress it, as in Fig. 8.

It is important that the horn E should be supported rigidly while the awl is forming a perforation to receive a nail and while the nail is being driven. I provide such support, as shown in Figs. 3, 4, and 5, by a pair of gripping-jaws, J, pivoted to each other by a stud, K, and arranged to seize the shaft G below the bracket F at the required moment. This grip is effected by a lever, L, pivoted on a horizontal stud, M, and made wedgeshaped So in crcsssection at one end to enter between and move the jaws. The other end of the lever is adjustably connected by a rod, N, with a cam-groove in a wheel, 0, fixed on the driving-shaft B. By reversing the position of the wedges, an edgecam may be substituted for the grooved face-cam. (Shown in Fig.3.) From this explanation it is apparent that during a part of each revolution of the driving-shaft the horn E is held rigidly and cannot be de 0 pressed. The mechanism is so timed that during this interval the awl descends to perforate the leather, then moves aside, and the driver drives the nail and clinches it. The firm support secured by my improvement during these operations is of great value.

The horn E stands normally with its tip coincident with the axis of the vertical shaft G,

about which it may be revolved. It is at times desirable to swing the tip out of position, as indicated by the dotted lines in Fig. 3. I therefore provide a tapering pin, P, to enter a corresponding hole in the horn and its bracket F. This pin secures said parts intheir working position; but it is detachable by a slight blow on its small end, after which the horn may be swung out of line,as desired. The tapering character of the pin permits its ready return and insures the correct position of the parts.

Figs. 3, 6, 13, and 1% illustrate another feature of my invention, by which wear incident to the lateral movement of the tool-carrying head on its ways is compensated for.

The overhanging frame Q at the top of the machine has at its front a stationary head, R, formed. with the projecting dovetail ways S, on which the sliding head T travels, to bring the awl and driver successively into position. Between these ways S and the corresponding part of the sliding head T, I introduce two reversely-tapered gibs, U, preferably of composition metal. These gibs are adjustable in the direction of their length by screw-bolts V, each having a radial collar, W, which enters a transverse slot formed in the side of one of the gibs. By this construction the most delicate adjustment is obtained and maintained, since several revolutions of the adj usting-screw are required to take up the thirty-second part of an inch of play between the parts, and also because no direct strain comes upon the threads of the screws.

The continuous wire a, from which the fastening devices are cut, is held on a spool or reel, from which it is uncoiled, as required. It is fed forward a given length at a specified time by the movement of two rollers, b 0, (shown in dotted lines in Figs. 1 and 15.) The roller I; has a permanent bearing; but the roller 0 is mounted at the end of a pivoted lever, d, provided with an adjusting-screw, e, by means of which the pressure upon the wire a may be readily regulated.

The roller 1) has fixed upon its front or outer end a gear or ratchet-wheel, f, and a movable collar, 9, adjacent thereto and arranged to escilla-te about the axis of said roller,as in Figs. 1 and 15, serves to govern the extent of movement of the feed-roller b. This collar is ametallic ring, and carries two or more pivoted 'ted to receive a stud or pin, j, on the collar This arm is raised by a spring, k, at its pivot, (see Fig. 3,) and is depressed by the downward movement of the sliding plate Z, which carries a-lug, m, coming into contact with said arm at the instant more wire is required. The extent to which the arm 1' rises determines the length of the are through which the collarg oscillates, and consequently governs the feed of the wire by determining how much it shall be carried forward at any given stroke by the action of the collar and its pawls on the ratchet f and feeding-roller b. Vhen, therefore, the vertically-sliding plate l,which carries the awl a, is raised for another stroke, the arm i 1s raised by its spring 1: until it strikes the tip of another arm, p, pivoted on a rock-shaft, q, Figs. 1 and 3. This shaft has a slotted crankarm, 1', to receive a link or rod, 8, which is adj ustably connected byapivoted branch arm, i, with the vertical rod to, extending up from the prolongation of the treadle I. The pivoting of the arm t may be dispensed with by extending the arm 0" inwardly instead of outwardly, as shown.

Now, since the horn is pressed upwardly by the spring H and shaft G as far as the thickness of the stock in the shoe-sole will admit, varying according to its thickness s that with thin stock the horn will rise nearly to the head,while the outer end of the treadle and the rod a, connected thereto, willbe depressed, raising the outer ends of the lever t and r, and lowering the tip of the arm 1). This arrests the arm i at the proper point in its rising, and insures the feeding forward of j ust so much wire as is required.

The sliding head T is moved horizontally on its ways S by means of a cam, 1, on the end of the driving-shaft B, working in a recess in said head, as indicated in dotted and full lines in Fig. 7. This horizontal movement is only equal to the distance from the awl n to the driver 0, so as to bring these tools successively into working position.

The cam 1 has on its front face a cylindrical stud or pin, 2, upon which is mounted a rectangular block, 3, which, at each revolution, traverses a horizontal recess, 4, in the sliding plate Z, thus giving to said plate the vertical reciprocation required to actuate the awl, the plate Z moving up and down in dovetail ways formed in the front of the head T. This movement of the block 3 also raises the driver 0, since the driver-bar 5 has a projecting shoulder, 6, beneath which the block 3 comes at each revolution to lift it to the position shown in Fig. 7, where the block is just releasing the shoulder, to permit the descent of the driver under the impulse ofthe spring 7, Fig. 1.

The horizontal movement of the head T on its ways S serves to cut off the length of wire which has been fed forward and to point the IIO next length; one member, 8,,of the cutting apparatus being held fast on a projection, 9, from the stationary head, and the other member,10, carried on the sliding head in position to shear off a length of wire at each reciprocation, and at the same operation to point the next length. I do not herein claim the specific cutters shown in Figs. 16 and 17, since equivalent devices might be operated by the sliding head.

The length of the wire fed forward and cut off is receivedin avertical position by a suitable carrier, and transferred to a point immediately beneath the driver and over the hole formed in the sole by the awl, so that it may be inserted therein by the descent of the driver.

The carrying device shown in the drawings has a receiver, 15, having two or more (and, by preference, three) vertical apertures through it, into which the wire is fed downwardly, as in Fig. 17. After it is cut off a partial rotation of the receiver carries the length of wire to its position over the awl-hole in the sole. The perforation forms a solid wall all around the nail to support it while being driven, and ity is guided from the bottom of the receiver to the sole by a divided throat, 16. (See Fig. 11.) This throat is formed by affixing ametal plate detachably to the head of the machine, and forming a vertical recess tween the two, and partly in each, to conduct the nail to the sole. Should the nail become bent or battered so as not to drive well, it may be removed by detaching the throat-plate, thus saving taking the machine apart.

The receiver 15 is partially rotated by any suitable mechanism, Fig. 12 showing, for this purpose, a cam, 18, on the shaft B, with apivoted lever, 19, engaging therewith. This lever is connected by a link or pitman, 20, with an adjustable lever, 21, which at its free end engages the receiver and turns it one hundred and twenty degrees on its axis. I do not claim this specific arrangement of parts, nor limit myself thereto, asI contemplate using a much simpler apparatus.

I claim as my invention- 1. The curved horn E, mounted for rotation on the shaft G, in combination with "the grippingjaws J, actuated from the drivingshaft, and adapted to alternately support and release the horn, substantially as set forth.

2. In a nailing-machine, the frame and the sliding head carrying the awl and driver, in combination with the tapered gibs U U and the flanged adj usting-screws V W, or equivalent devices,f0r the purpose set forth.

3. The wire-feeding apparatus herein described, consisting of the roller a, mounted in the lever (Z, and provided with the adj ustingscrew 0, in combination with the roller b,

toothed wheel f, oscillating collar 9, and two or more pawls, h, arranged substantially as set forth.

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

HENRY S. BACON.

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