US316986A

US316986A - Tack-driving machine

Info

Publication number: US316986A
Authority: US
Publication date: 1885-05-05
Anticipated expiration: 1902-05-05

Description

(No Model.)

I 3 Sheets-Sheet 2. A. S. LIBBY.

TACK DRIVING MACHINE.

Patented May 5 flv'e'ni'vr:

M16162: 15 La'y,

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RS. Photo-Um (No Model.) 3 Sheets-.-Sheet 3. A. S. LIBBY.

TACK DRIVING MACHINE.

No. 316,986. Patented Ma 5, 1885.

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ASA S. LIBBY, OF EVERETT, MASSACHUSETTS.

TACK-DRIVING MACHINE.

SPECIFICATION forming part of Letters Patent No.316,986, dated May 5, 1885.

Application filed August 7, 1884. (No model.)

To aZZ whom it may concern.-

Be it known that I, Asa S. LIBBY, a citizen of the United States, residing at Everett, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Tack-Driving Machines, of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to improvements in tack-driving machines, and is specially designed for driving lasting-nails in lasting the uppers of boots and shoes to their inner soles preparatory to securing the outer sole to the vamp and inner sole.

My invention consists of a disk the periphcry of which is provided with grooves for holding loose nails or tacks, said disk being confined in a casing and adapted to be rotated by the mechanism which lifts the hammer, so as to present or feed a tack or nail into its proper place each time the hammer is raised.

My invention consists, further, in certain details in construction, which will be fully described hereinafter, and pointed out in the claims.

Referring to the drawings, Figure l is a front elevation of my device. Fig. 2 is a side elevation. Fig. 3 is a vertical sectional view. Fig. 4 is a top or plan View of the tack-holding disk and easing with the spring for pushing the tack out into the hollow foot to be struck by the hammer. Fig. 5 is a horizontal sectional view taken on the line 00 w of Fig. 2, showing the stop for holding the disk and also the pawl for imparting motion to the disk. Fig. 6 is a top or plan view of a modified form of devices for imparting a rotary motion to the tack-holding disk.

A is a box or shell in which is pivoted the tack-carrying disk or plate B, said disk being provided with a series of grooves or depressions, a, formed around its entire periphery for holding the loose tacks.

As before intimated, the disk B is secured in the shell or box A by means of a pivot-pin, O, which permits the disk to be rotated within the shell by devices, which will be presently described.

The box or shell A is provided with an extension, D, to which the hammer holding standard or cylinder E is secured by means of screws 12, and also an opening, 0, in which the point or nose of the nail'tube d is secured by means of a set-screw, e, or in any suitable manner. The box or shell Ais also provided with a slot through which the pawl f projects and is held in contact with the disk or plate B by means of the strap-spring G, secured to the side of the shell A. The box or shell A is also provided with a perforation, 9, through which a pin, H, projects, the inner end of said pin being held in contact with the edge of the disk B by means of the spring h, which serves to hold the disk in a condition of rest until the hammer has fallen and the tack is driven home. G is a cap or cover to prevent the tacks from falling out when the tool is inverted.

E is a cylinder or tube provided at its lower end with a projection, I, by means of which it is secured to the. extension D of the shell A.

K is a plunger or piston mounted within the cylinder E, to the lower end of which is secured the hammer or driver i, which works through the bore of the nail-tube a, the upper end of the tube being provided with a coiled spring, k, which, when the plunger is released from the lifting devices, to be hereinafter described, forces the plunger down to drive the tack or nail which has been previously deposited in the nail-tube.

The upper end of the cylinder E is closed by means of a screw-bolt, L, which may be made long enough toimpinge on the top of the coiled spring 70, and by means of which the tension of the spring may be regulated.

A slot, Z, is formed in the cylinder or tube E, through which a latch or catch, M, projects, said latch being pivoted in a recess, m, in the upper end of the piston or plunger E and forced outward by means of the spring N.

O is a collar adapted to slide on the lower end of the cylinder E, said collar being provided with lugs n, to which the lower ends of the handles 0 0 are secured.

is a bracket or collar adj ustably or otherwise secured to the cylinder 'E, and is pro vided with a projection, p, in which is pivoted a togglelever, B, the outer ends of the toggle-lever R being pivoted to the handles 0. The free or unconfined joint of the toggle-lever R is provided with a pin,fr, which projects inwardly through the slotZ in the tube or cylinder E, and impinges against the lower side of the latch or catch M, and carries the plunger up until the catch is forced inward by coming in contact with the end of the slot Z, when it is freed from the pin 9, and the plunger is forced down by theaction of the spring k.

S is a bow or strap spring sprung in between the two handles and held by the pins 8, the office of which is to force the upper ends of the handles outward as soon as released from the pressure of the hand of the operator, so as to depress the toggle-lever and bring the pin 1' onto the under side of the catch M in position to raise the plunger again.

I will now proceed to describe the devices by which the disk is turned with a step-bystep motion to bring said disk in position for depositing a tack in the nail-tube.

T is a bell-crank lever pivoted to the extension D of the case A, while the other end of the lever T is secured to the bar U. The outer end of the pawlf, heretofore described, is secured to the bell-crank lever T, so that when said lever is raised the pawl will be thrust forward to turn the disk 13. As before stated, the lower end of the bar U is secured to one arm of the bell-crank lever T, while the upper end of said bar is secured to the bracket 1? by means of a slot, u, and set-screw v.

V is a headed pin or bolt secured to the plunger or piston K, and adapted to work in a slot, w, formed in the cylinder E. The outer end of the headed bolt V works in a slot, 3 formed in the bar U, so that when the plunger is raised the pinVwill strike against the upper end of the slot 3 raising the bar U, which in turn operates on the bell-crank lever T to operate the pawl f.

a is a spiral spring one end of which is secured to the extension D, while the upper end is secured to the bar U, so that when the plunger is released and the blow made for driving the nail the tension of the spring will draw down the bar U, depress the bell-crank lever T, and draw back the pawl the distance of one notch on the disk B.

B is a strap-spring, one end of which is secured to the side of the casing A, while-the other or free end projects over and into the casing back of the tack-grooves, so that it will push a tack out of the groove in the disk into the nail-tube as the tacks are brought successively against said free end of the spring by the rotation of the carrier or disk.

0 is a strip of metal, which projects inwardly toward the nail-tube and serves as a stop to prevent the spring B from coming in contact with the hammer, and also to prevent the tack from flying out.

In Fig. 6 I have shown devices in a modified form for turning the disk 13, in which the pawl Dis provided with a lug or toot-h adapted to fit in serrations formed on the top or bottom of the disk, the pawl being operated by a lug or other suitable device on the piston. This form is simply shown as a modification, while other devices will readily suggest themselves to the skilled mechanic, and will come within the spirit of my invention.

The box or shell A, with the serrated disk B therein, is adapted to be readily taken off or secured to the cylinder or tube E,so that the disk can be filled with tacks by means of a device which forms thesubjcct-matter of a separate application for a patent filed of even date with this application, Serial No. 139,900, filed August 7, 1884:.

It will be understood that thewalls of the casing A are continuous, except at a point directly above the nail-tube, so that the nail can be forced from its place in the disk B into the nail-tube by the spring or finger B.

While I have described my invention as applicable to the driving of nails or tacks in the lasting of boots and shoes, I do not wish to limit myself to such use, as the device is applicable and well adapted for tacking down carpets and other like uses. V

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-- 1. In a tack-driving machine, the combination of the rotating disk having tack-holding cavities in its periphery, with a bell-crank lever and pawl, and a bar operated by the upward movement of the tack-driving mechanism to rotate the dislgsubstantially as specified.

2. The combination, in a tackdriving machine, of the driving-hammer, the spring for forcing the same downward, the togglelever and the pivoted handles, and the tripping device for freeing the togglelever from the tack-driving hammer, as set forth.

3. In a tack-driving machine, a plunger or piston provided with a nail-driving pin on its lower end located within a cylinder or tube, and provided with a spring-catch, M, in combination with the toggle-levers R, stud r, pivoted handles 0, and spring 70, as and for the purpose set forth.

4. In a tack-driving machine, a disk provided with tack-holding cavities in it's periphery inclosed in a casing opening into the tack-holding tube, in combination with the spring B, and devices, substantially such as described,for moving the tack-holding disk.

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

ASA S. LIBBY.

Witnesses:

W. E. Rocnns, STEPHEN Snow.

IIO