US317928A - Nail-making machine - Google Patents

Description

(No Model.)

G. W. COGIN.

' fiAIL MAKING MAGHINE. No. 317,928. E Patented May 12, 1885.

l\ I Z 5 5 UNITED STATES.

PATENT OFFICE.

CHARLES w. 00cm, or LYNN, MASSACHUSETTS.

NAIL-MAKING MACHINE.

SPECIFICATION forming part of Letters Patent No. 317,928,dated May 12, 18885.

Application filed October 8, 1883. (No model.)

To all whom it may concern.-

Be it known that I, CHAS. W. COG-IN, of Lynn, in the county of Essex and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Nail- Manufacturing Machines, of which the following, taken in connection with the accompanying drawings, is a specification.

This invention pertains to mechanism for manufacturing nails; and it consists in a presser-foot of peculiar form and construction com- .bined with the nail-punch, all of which is fully described and specifically claimed hereinafter.

In the accompanying drawings, Figure 1 is a perspective view of the presser-foot. Fig. 2 is a side elevation of the presser'foot and a portion of a nail-machine. So much only of the machine is shown as is necessary to fully illustrate the application and use of the presser-foot. Fig. 3 isa plan of a section made on dotted line a" m, Fig. 2, and illustrates the mechanism for guiding the stock, the nail-die, and a portion of the presser-foot.

O designates the stationary bed-block, and D the sliding block, of an ordinary powerpress, too well known to require description. The gages E E are secured, as represented, to the bed-block C, and operate to guide the nailstrip (6 relatively to the nail-die A, as fully represented in Fig. 3. Said nail-die A has an outline similar to that of the intended nail, and in arranged in the bed-block 0, while its punch B is secured to the sliding block D.

The construction of the above-mentioned parts as well as the combination and use thereof in an ordinary power-press for making nails is well known to those skilled in the art to which it pertains, and need not therefore be particularly described here.

In manufacturing nails by mechanism substantially as referred to above, the workman first selects iron of the desired thickness and cuts it into strips equal in width to the length of the nail to be produced. One of these strips is then placed between the gages E E, Fig. 3, and pushed forward by any suitable feed mechanism till the end of the strip projects over the nail-die A, and thereupon the press is operated to bring down the nail-punch and cut out a nail, which nail passes down through the die to any suitable receptacle placed under the same, while at the same time a small end of the nail'strip a is left upon the block 0 in front of the punch. This being the firstcut from the strip is unfit for use as a nail and passes into the waste. It will now be observed, upon examination, that the end face of the strip a has a contour like the edge of the nail last produced, so that by forcing or pushing forward the strip till its end again projects over the die a distance equal to the width of a nail and cutting out a second nail, as before, it will be observed that the piece left upon the block 0 in front of the punch is exactly like the nail which passes through the die. In order, however, to secure the perfect formation of this second nail it is necessary that the extreme end of the nail-strip a should be quite securely held during the cutting operation; and to attain this object, and also to facilitate in the rapid operation of the machine, constitutes the main purpose of this present invention. To this end I have contrived and make use of a spring presscr-foot, the form and construction of which is fully represented in Fig. 1. This foot is secured to the sliding block D, as fully shown in Fig. 2, so that as the block descends for the pur pose of cutting out a nail the end of the presser-foot will bear upon and securely hold the end of the nail-strip a, and thus insure the perfect formation of the second nail. The tension required to be given to the presserfoot will be obvious to those skilled in the art.

I am aware that a presser-foot adapted to slide in suitable ways and operated by a cam for the purpose described is not new, such a device having been shown in Letters Patent of the United States No. 145,336; but such is no part of this invention.

In operation it sometimes happens that the resser-foot in lifting upward takes up the nail, which by adhesion clings to the bottom of the foot, so that as the foot again comes down it is not permitted to properly press upon the end of the strip a. This difficulty occurs more especially when the machine is worked at a very rapid speed. To obviate this difficulty the presser-foot is provided with a small supplemental spring, e, which is arranged to recede into a suitable recess, b, in the foot whenever the foot bears upon the nail-strip, but immediately springs outward when the foot lifts, and thus casts ofi the nail,

if any, that may have clung to and been picked up by the foot. The nail when removed falls upon the block 0, and is pushed forward by the end of the strip a and reaching the opening N it falls down to the receptacle under the machine. By this simple arrangement the machine may be run at a much greater speed without getting clogged.

I claim, and desire by Letters Patent to secure- 1. In combination with a punch and die of a nail-machine, the herein-described presserfoot, composed of a single piece of spring-metal secured at one end, as shown, the other end being adapted to bear upon the nail-strip intermittingly, as set forth.

2. In a nail-machine of substantially the construction described, the combination of 20 a presser-foot adapted to bear intermittingly upon the nail-strip, as set forth, and independent means for automatically detaching the severed end of the strip from the presser-foot, substantially as and for the purposes described. 25

3. In combination with the presser -foot above described, the supplemental spring 6, substantially as set forth.

Signed in presence of two witnesses.

CHAS. V. COGIN.

Witnesses:

F. W. BEALE, O. B. TUTTLE.

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