US355117A - Boot and shoe nailing machine - Google Patents

Description

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. H.v S. BACON.

BOOT AND SHOE NAILING MACHINE.

N0. 355,117. Patented D60. 28, 1886.

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v H; S. BACON; BOOT AND SHOE NAILING MACHINE.

No. 355,117. Patented Dec. 28, 1886-.

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N Prrrzasmowuma n mr, Washington, 04 c.

,7 UNITED STATES PATENT OFFICE.

HENRY S. BACON, MILFORD, MASSACHUSETTS.

BOOT AND SHOE NA|L|-NG MACHINE.

SPECIFICATION forming part of Letters Patent No. 355,117, dated December 28, 1886.

Application filed January 28, 1886. Serial No. 190,009. (No model.)

To all whom, it away concern:

Be it known that I, HENRYS. BACON, of Milford, county of Worcester, State of Massachusetts, have invented certain new and use ful Improvements in Boot and Shoe Nailing Machines, of which the following is a specification, taken in connection with the drawings accompanying and forming a part hereof, in which Figure 1 is a front elevation of the head of the machine provided with my improvements. Fig. 2 is a side elevation of the same. Fig. 3v is a side elevation of the opposite side from Fig. 2, with some of the parts broken away. Fig. 4 is a rear view from line 00 :0, Fig. 3.- Figs. 5 and 6 are a plan and side View, respectively, of the cams which operate the awl-bar and driver. Figs. 7 and 8 are rear and side views, respectively, of the awl-bar. and 10 are rear and side views of the driverbar. Fig. 11 is a plan of the ratchet and pawls which operate the feed-roll. Figs. 12 and 13 are a plan and side view, respectively, of the connecting-lever of the mechanism which automatically adjusts the length of the nails. Fig. 14 is a plan of the pawl and ratchet and gears which actuate the nailcar rier.

My invention is an improvement on the machine sh'own and described in Letters Patent of the United States N 0. 319,875, dated June 9, 1885, granted to me.

In an application for Letters Patent made by me and now pending in the United States Patent Office, I have shown an improved hornreleasing mechanism by which while the horn moves downward a given distance at every revolution of the shaft to allow the stock to be fed forward, the point from which it is lowered is variable, and varies automatically with the thickness of the stock. In sucha machine, designed to operate on stock of a considerable thickness, the awl must have a downward movement of considerable length, in order to pierce whatever thickness of stock may be put into the machine. The downward movement of the awl takes place just in front of the horn, and, in the machine referred-to, when the horn is high up, as when light or medium stock is being nailed the awl-point-projects downward considerably below the tip of the horn and in front of it, and as the head of the ma- Figs. 9

chine is moved to feed the stock forwardwhile the awl is down and before it is raised sufficiently to clear the point of the horn the awl is liable to come in contact with the horn and be bent or broken, or damage the horn. One object of my present invention is the production of mechanism for regulating the movement of the awl, so that interference between the awl and the tip of the horn may be avoided, and this feature of my invention consists of the cam mechanism, operated from the main shaft in conjunction with the awl-bar, as is hereinafter more fully described.

My invention further consists of the cam, lever, and ratchet mechanism shown and described for intermittently actuating the cylindrical nail'oarrier, which carries the nail from the cutting mechanism to thedriver; and further, my invention consists in the combined cam, lever, and stop mechanism, arranged as shown and hereinafter set forth, by which the length of nail required is automatically'regulated from the thickness of the stock on the horn.

the machine shown in the accompanying drawings, throughout which like letters of reference indicate like parts.

A is the standard of the machine.

13 is the sliding head, which is moved by the cam-disk C (see Fig. 1) while the awl is in the stock in order to feed the stock forward. In the face of the sliding head B the awl-bar a and driver-bar b are mounted in ways or grooves cut therein, to permit of their vertical reciprocating movement. The awl-bar a and driver I) are forced down by spiral springs a (see Fig. 1) in the well-known manner.

In order to move the awl-bar upward, a camdisk, d, (see Figs. 1, 5, and 6,) is provided, which is mounted on the end of the shaft, and directly behind the awl-bar, and arranged to act against ashoulder, f, thereon. As the cam d assumes the position shown in Fig. 1,.the

shoulder f of the awl-bar passes the point f I of the cam, and allows the awl to be forced downward through the work. Immediately upon its reaching the lowest point in its downward movement the point f of the cam begins to bear against the shoulder f of the awlbar, and at once raises it so as to bring the ICC - ward movement of the awl-bar raises the awl point in, but not above, the stock, and in this position the sliding head B moves toward the left, and the stock is fed forward with the point of the awl in it. When the feed movement is completed, the point f of the cam d acts to raise the awl to its highest point again, when the movement is repeated. By this mechanism the awl is raised clear of the tip of the horn, but not clear of the stock on the horn, so that when the head of the machine slides the stock will be fed forward- The camf raises the driver-bar in the well-known manner, acting in conjunction with shoulderf placed thereon.

The mechanism for operating the nail carrier is constructed as follows: D is a cam fast on the main shaft and provided with a campath, g, on its periphery. A lever, h, pivoted to the frame of the machine, (see Fig. 2,) is provided at one end with a cam-truck, h, which acts in the caurpath g. The other end of lever It has pivoted to it a connectingrod, '5, by which it is connected with the pawllever j, (see Fig. 14,) which is pivoted on the arborwith the gear 70 and ratchet Id. At every revolution of the main shaft the pawl on lever j moves the ratchet it forward one tooth, and 1 turns the gear k, which is fast to it, a corresponding distance. The pawl of lever j is held against its ratchet k by the tension of the spiral spring 9 fast at one end to the pawl, and at the other to the lever. (See Fig. 14.) The gear is meshes with pinion k fast to the cylinder of the nail-carrier, and each movement of the gear k, caused by the forward movement of the ratchet k, actuates the pinion k and causes the nail-carrier E to revolve through one-third of its circumference which transfers the nail, which may be cut at Z to Z, where it is driven. (See Fig. 14.)

It is necessary that the nail-carrier E, when it is revolved, be stopped exactly at the right point, in order that the hole, which carries the nail, may come directly under the driver. To efiect this the recesses m (shown by dotted lines, Fig. 14,) are cut in the sides of the nailcarrier at such a point relative to each nailhole, respectively, that the end of the bar E, striking the end of a recess, (see Fig. 14,) will stop the nail-carrier instantly, and in exactly the proper positionto bring the nailhole under the driver.

The bar E is rigidly secured by bolts n n to the frame of the machine. It will be obvious that, instead of the recesses m, a pin may be set in the nai1-carrier so as to project from its surface sufficiently to come in contact with bar E, and thus accomplish the same object.

After the nail is driven the sidewise feed.

movement of the head carries the nail-carrier with it and frees it from contact with the stopbar E. During this feed movement the gear k changes its position relatively to the stationary gear k, the latter turning loosely in mesh with the former and the movement being insufficient in distance to throw the gears out of mesh. During this movement of gear k the pawl of leverj is raised out of the notch in the ratchet, but the notches are sufficiently far apart (see Fig. 14) to prevent it from dropping into the succeeding one.

I shall now describe the mechanism by which the length of nail, cut and driven, is automatically regulated by the thickness of stock which is on the horn. The'rod G is connected in the wellknown manner with the horn-depressing treadle, which is not shown in the drawings, and as the horn moves downward the rod G is moved upward. To the upper end of rod G (see'Fig. 3) is pivoted the lever H, which is provided with a sliding fulcrum at K, as will be hereinafter described. The other end of this lever is slotted, as shown at 0, Fig. 3, and in this slot is pivoted the lower end of the piece L, which is adapted to slide vertically in the stationary frame of the machine, as shown, Fig. 3, and is provided with an arm or projection, M, which proje'cts at right angles thereto. A cam-disk, N, (see Figs. 3 and 4,) is secured to the main shaft, and directly above it the lever P is pivoted at I? to a stud, P, on the frame. A friction-roll, p, journaled on a stud on the lever, is set directly over the periphery of the cam N, andis adapted to act thereon. To the other end of lever Pis pivoted the linklt, which is pivoted at its lower end to the disk R, set on the shaft S of the feed-roll. (See Fig. 2.) On the shaft S, and close up to the opposite face of the disk R, is secured the ratchet T, see Fig. 11,) and' on this side of the disk R are pivoted three pawls, q, equidistant from each other and each acted upon by leaf-springs r to hold them against the ratchet-teeth, the springs being secured in any convenient manner to the disk R. The pawls q are so arranged with relation to each other and to the ratchet-teeth that while one of the pawls bears against a tooth the point of the next pawl will lie midway of the incline of its tooth, while the third pawl will lie very near the top of another tooth, as is shown in Fig. 11. By this arrangement I am enabled to use a coarser toothed ratchet than I otherwise could, and at the same time it will be very sensitive to the movement of the pawl-disk B, so that the slightest downward movement of the link R will turn the ratchet T, and consequently the shaft S and its feedroll S. (See Fig. 1.)

The feed-wheel S is set in the sliding head of the machine and operates in the well-known manner. The shaft S is journaled' at one end in the sliding head B, (see Fig. 2,) and at the other end in an arm, B secured to said head and projecting rearwardly therefrom. This shaft, therefore, as also the disk R and its ratchet mechanism, slides with the sliding head B, and is permitted to do so, while at the same time it is connected with the operatingwell-known manner.

lever P (see Fig. 4) by reason of the link connection R, which is flexible and will permit of this movement, as will be obvious.

The length of nail depends, as in many machines of this class, upon the length of wire fed down during one movement of the feedrolls, and the movementof the feed-rolls is governed by the movement of lever P, through the chain of mechanism just described. The upward movement of the free end of lever P, and consequently the downward movement of the link at the other end of the lever, is effeoted by the rotation of cam N, as will be obvious. .(See Fig. 4.) When the cam N passes the point shown in Fig. 4, it permits the free end of the lever P to drop until either the roll p strikes the cam periphery or the projecting end of the lever P strikes the projection or stop M on the vertical piece L. If the projection M is high up, the lever P will-drop only a short distance, and as it is raised to the same height each time by the rotation of cam N it will only move upward a short distance at thenext revolution of the cam and the disk u It, and consequently the feed-roll S will be actuated only slightly, and consequently ashort length of wire will be fed down and a short nail produced, while if the projection M be low down the reverse will be true and a longer nail will be cut. The length of the nail, therefore, is governed by the position of the stop M, and the position of the stop M is governed by the position of the horn through lever H, rod G, and the horn-treadle mechanism, as has been already described. It will be seen, therefore, that if thick stock is put on the horn the horn will be correspondingly lowered, lowering the projection M and causing a corresponding length of nail to be fed down.

For the purposeof adjusting the throw of lever H, and thus setting or adjusting the length of nail which it is desired to drive into the thickness of stock on the horn, a sliding fulcrum, as shown at K, Fig. 3, is provided. This consists of a block adapted to slide in a slot, in the lever H, (see Fig. 12,) and into which the pin K also passes, which is adapted to slide in a corresponding slot in the frame. (See Fig. 3.) This latter block is actuated by an adjusting-screw, it, set in the frame in the By means of this screw the fulcrum of the lever may be changed and finely adjusted, and in case it is desired to have the nails sufficiently long relatively to the thickness of the stock, so that their heads will project slightly above its surface, this may be effected by a slight movement of the adj listing-screw 15.

What I claim is- 1. In a boot and shoe nailing machine, the combination, witha sliding head, of an awlbar movable vertically therein andhaving a lifting-shoulder, as f, and a rotating cam, d, having two operating parts, ff of different throws, whereby when the said aWl-bar has been raised to its highest point by the part f,

and has completed its downward movement to pierce the stock, the awl will be immediately raised above the horn, but not out of the stock, by the part f the awl remaining in the stock until the latter has been fed by the sliding movement of the said head, substantially as set forth.

2. The combination, in a nailing-machine, of the lever h and its operating-cam, the connecting-rod i, lever j and its pawl and ratchet and gear, and the nail-carrier E and its actuating-pinion, substantially as shown and described.

3. The combination, withthe operating parts of a nailing-machineof the cylindrical nailcarrier E and its actuating mechanism and the stop-bar E, for the purposes and substantially as set forth.

4. The combination,with the operating parts of a nailing-machine, of the stop M,actuated, as set forth, by the movement of the horn, and the lever P and its actuating-cam, disk R and its actuating-link, and pawl and-ratchet meehanism on the shaft of the feedq'oll, whereby the movement of the feed-rolls is governed by the position of the horn, for the purposes and substantially as set forth.

5. The combination,with the operative parts of a nailing-machine having mechanism to automatically regulate the nail from the position of the horn, of lever H, provided with a fulcrum set in blocks adapted to slide in slots in the lever and frame, and actuated by the adjusting-screw t, for the purposes and substantially as set forth.

HENRY S. BACON.

Witnesses:

WM. A. MACLEOD, ROLAND B. HOLDEN.

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