US309255A - Wire nail machine - Google Patents

Description

(No Model.) l 3 Sheets-Sheet 1.

G. H. RYAN. 4.

WIRE NAIL MACHINE. No. 309,255. Patented. Dec. 16 1884.

l w I v I "'2. m l a;

(No Model.) 3 Sheets --Shaet 2.

G.H.BYAN.

WIRE NAIL MACHINE;

No. 309,255. tented Dec. 16, 1884. v

N. PETERS. Phoko-Lifiwgmphnr. Washmglon. D. c.

3' Sheets-Sheet 3.

e. H. RYAN.

WIRE'NAIL MAGHINE.

No. 309,255. Patented D60. 16, 1.884.

Win-155555.

N. PETERS. PhuIn-Lkhogrnphun Wilslvingkum n. c.

I UnTTnn TaTns PATENT FHQE-O GEORGE H. RYAN, OF TAUNTON, MASSACHUSETTS, ASSIG'NOR TO L. A. ROUNDS, OF SAME PLACE.

WIRE-NAIL MACHINE.

SPECIPIOATTON forming part of Letters Patent No. 309,255, dated December 16, 1884.

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

To all whom it may concern:

Be it known that I, GEORGE H. RYAN, of Taunton, in the county of Bristol and State f of Massachusetts, have invented an Improved Machine for Making W'ire Nails and Tacks, of which the following is a specification, reference being had to theaccompanying drawings, making a part hereof, which show one of my improved machines Figure 1 being a central longitudinal secl tion; Fig. 2, a plan. Fig. 3 is. a side view showing the gripping-dies and the lever for forcing them together. Fig. 4 is a side view showing the feed mechanism.

Machines for making nails and tacks from wire or wire-like strips of metal have long been in use; and they consist, essentially, of afeeding device for feeding the wire forward, step by step, according to the length of nail desired,a pair of gripping-dies, which open j ust before the wire is fed between them and which close upon and grip the wire and hold it firmly, a pair of cutters which cut off the wire at the proper distance from the gripping dies, and a header, the blow of which upsets that part of thewire which projects from the dies and forms a head. A clearer is also used, whose function is to strike the. finished nail and knock it clear of the wire in case the out ters should not have completely severed it, this clearer operating while the wire is held by the gripping-dies just after the cutters have operated and just before the header is thrown forward.

My invention relates mainly to the heading mechanism and incidentally to the feeding mechanism; and it consists in causing the header to strike two blows on each nail instead of but one, as heretofore.

Inasmuch as wire nails and tacks vary in diameter and also in the amount of stock desirable in the head, it is necessary to nicely regulate the force of the blow given by the header to suit the size of wire used and the kind of head required, and owing to this a machine well adapted to certain sizes of wire is almost wholly unfit for use on wire one size larger, and practically useless on wire two sizes larger th an the machine was made for; hence in practice a series of machines is requisiteone size for wire of a certain gage and below that gage, the next size for wire of a certain larger gage and so 0nthe second size being over double the weight of the smallest size as these machines are usually made, as the force of the blow struck by the header for wire of a certain diameter must be much more than doubled for wire of twice that diameter.

The object of my invention is to diminish the force of blow requisite in heading the nails, and thereby not only adapt agiven size of machine for much larger wire than heretofore, but also to improve the heads of the nails, for I have found by experience that two comparatively light blows of the header on each nail will do the work done by oneheavy blow and do it better.

In order to get more time for the double blow of the header, I have altered the feeding mechanism and have also so timed the meeh anism by which the erated as to cause them to grip the wire for a larger portion of each revolution of the machine than heretofore.

Many of the parts of the machine shown are old and well known, except as above indi cated, and will not be described except in so far as their description is needed to a clear understanding of my invention.

In the drawings, Arepresents the frame; B,

the header-slide, and 0 its spring.

F represents the clearer.

H H represent the cutter-levers; if it, the cutters, and h [L7 the cutter-cams.

The header-slide B is forced back against the spring 0 by means of a cam, 11, which is provided with a the header in its retracted position long enough to enable the wire to be fed forward the length of a nail, to allow the gripping-dies to seize the wire, the cutters to severit, andthe clearer to knock the finished nail out of the way. The projection b then releases the headenslide B, which is thrown forward by the springCwith force sufficient to partially form ahead on the wire held by the gripping-diesDD. Another projection, b on the cam I), again forces the gripping-dies are op concentric portion, Z), to hold header-slide against the spring 0, but quickly releases it and allows it to be thrown forward to make a second blow and finish the head.

It is obvious that r the gripping-dies D D must be opened and the feed take place in the same time that the projection I) of the cam b is retracting the header-slide B. The lever d of the upper gripping-die, D, is hinged to its frame and is forced down by means of lever d,

pivoted at (1 actuated by cam d", and forced Atoggle-pin, d connects The shape back by spring (1". the lever d with the cam-lever d.

of the cam d is shown in Fig. 3, from which it will be seen that the depression by which the gripping-dies are allowed to separate forms a small portion only of the periphery of the cam, the concentric part of which holds the dies together.

For the purpose of nicely adjusting the face of the gripping-dies in relation to the cutters, so as to cause the exact amount of metal required for the head to project, I have mounted the gripping-dies in aframe, I, movable on the main frame A but capable of being rigidly secured to the main frame A, by means of screw-bolts M and screw i. The holes in the main frame through which the bolts it pass are elongated to permit the requisite movement, as is also, the hole in the ear of frameI through which screw i passes. A wedge, i", isinserted between the frame I and the main frameA and adapted to be adjusted by means of a screw, '6 and nut '5'. On loosening the bolts.@' i and screw i and properly adjusting the wedge 4 the frame I, and consequently the dies D D, may be moved toward or from the cutters h h to accurately determine the amount of metalleft between the cutters and the dies for forming the head of the nail. It is desirable that the stress of the lever (1 should be such as to tend to keep lever din place, and for this reason the toggle-pin d is so inclined as to allow for the requisite adjustments of the grippingdies and still retain its bracing position.

I do not claim the combination of header, gripping-dics,and mechanism for adjusting the grippingdies toward and from the header. The feed-cam J operates the usual feed-carriage, j, in one direction and a spring, j operates it in the opposite direction under control of the cam J. The feed-carriagej is of the usual construction and slips readily over the wire when moved by the spring j but grips the wire and feeds it along when moved by the cam J.

It will be obvious that any suitable feed may be used if properly timed with relation to the gripping-dies.

The header-cam b has heretofore been upon the shaft h*, which carries the cutter-cams h h and has consequently been placed between the cutter-cams, and it has therefore been usual to make these cams in one piece. In my machine I make the header-cam b independent of the cutter-cams and place it on a separate shaft, 1). This enables the headercam b to be made much wider than is possible when it is placed between the cutter-cams h 71 For the purpose of keeping the cutter-levers in their correct positions I use conical bushings k on the trunnions of the cutter-levers, these trunnions being made conical to fit the bushings, so that the wear is readily taken up by simply adjusting the bushings. These bushings fit closely in their holes and are held in place by set-screws, as shown.

-What I claim as my invention is- In a machine for making nails and tacks from wire, the combination of the header, the feed, the clamping-dies, and the cutters with a cam having a concentric portion to hold the header back while the wire is fed forward and the cutters sever the finished tack, and projections to operate the header twice for each operation of the feed and cutters, substan tially as described.

GEO. H. RYAN.

lVitnesses:

J. E. MAYNADIER, WM. MAYNADIER.

Images