US70905A - Moreis seiferth - Google Patents

Description

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MORRIS SEIFERTH, 0 F MORRI'STOWN, NEW JERSEY.

7 Letters Patent No. 7 0,905, dated .Zll'ovemberv 12, 1867. A

IMPROVED APPARATUS FOR PUNGHING SHEET METAL.

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TO ALL -WHOM IT MAY CONCERN:

Be it known that I, MORRIS SE'IFERTII, of Morristown, in the county of Morris, and State of NewJersey, have invented'a new and improved Punching Machine; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skillcd in the art to make and use the same, reference being had to the accompanying drawings, forming a part of this specification, in which- Figures 1 and 2 represent side elevations, partly in section, of my improved punching machine, showing the parts in different positions.

Figure 3 is a horizontal sectional view of. the same, the plane of section being indicated by the line was, fig. 2.

Similar letters of reference indicate corresponding parts. i

This invention relates to a new punching machine for perforating plates, or for stamping or notching the same, and consists in the use of an automatic clearer, by which the plate, after a hole or depression has been punched, is lifted off the lower stationary punch, so that it can be easily adjusted upon the same for the punching of the next hole or mark, while the die is moved up by the cam of the driving-shaft.

The object of this invention is to clear the plate after each stroke, to avoid. the'neccssity-of-raising it off. the punch, thereby permitting continuous operation of the apparatus, while heretofore the machine had to be stopped to give time for taking off and readjusting the plate.'

A represents the standard, made of cast iron or other suitable material, in the ordinary or suitable form. B is the bed, in which the punch C is held. D is the shaft, in the upper part of the standard, carrying an eccentric, a, by means of which the slide E is moved up and down, the said slide E being tubular at its lower end to receive the die F, as is clearly shown in figs. 1 and'2. The punch C, which is of cylindrical or prismatic form, is fitted in a tubular holder, G, and rests on the end of a screw, 6, fitted into the lower end of the holder G. The holder is fitted through a hole in the bed-plateB, and base. shoulder, c, by which it is supported upon the bed-plate, and through which screws (2 are fitted into the bed plate, to prevent the holder from turning. The punch, if of cylindrical form, is prevented from turning in the holder Gby means of a pin or; screw, e, as shown in fig. 1. The punch, when secured in place in the manner above described, can be refitted and refiled when worn, and raised to the proper heightby the screw 6, audthus it can be almost completely used up. The die F is made tubular, if holes are to be punched through the plates, to receive the pieces punched out, but if marks orindentations are to be stamped upon the face of the plate, the die can be solid, its lowerend being counter sunk, as required. The tubular die can be fastened inthe slide E by means of a screw, f, fitting through the side of the slide into a notch in the upper part of the die. The'solid die should be made long enough to reach to the upper end of the hole in the slide E, so that the upper end of the die will receive the pressure and not a shoulderon the lower part of the same, such shoulder being provided on the hollow die. Upon the shaft 1) is mounted a small eccentric 'cam, g, which acts upon a nearly or quite vertical bar, it. The lower cnd of the bar It is pivoted to one end of a lever, 2', the said lever being at or near its centre pivoted to a stud, j, projecting from the ied-plate B, as shown in fig's. land 2. The free end of the leveri is bifurcated, as shown in fig. 3,

and embraces the punch 0.. The bar It is guided in suitable slotted arms projecting from the standard A, or in slots formed in the standard. A

When the plate to be punched is placed upon the punch, as shownby red lines in fig. 1, the eccentric g is not in contact with the upper end of the bar it, and the free or bifurcated end of the lever 11 is then held down upon a shoulder in the holder G by means of a suitable spring, 70, so as to be flush with the face of the holder.

The plate rests upon the punch, (all as shown in' fig. 1,) and, when the die is brought down, by turning the shaft C the plate iiI fcrceddown upon the face of the holder, and the punch projects into or through it. Then the bar It is, by the cam g, depressed, whereby the bifurcated end of the lever c' is raised, as in fig. 2, and the plate is thus, by means of this lever z, lifted off the punch, and can be readjusted over the same before the die comes down again. i

If the plate to be punched is secured upon a'perforated gauge, to facilitate the accurate setting, and to do away with the marking of the plate, the punch must project so much more from the face of the holder G- as the gauge is thick.

is kept clean and sharp.

Having the die above the punch is of great importance, especially for indenting plates, as thereby the die The machine is intended to be generally workcdin connection with a gauge, as above stated, but can also be used without, if desired. V

' By means of the screw 6 the punch can be raised or lowered, so t'hat where indentations are to be made the same can be of any suitable depth, according to the position of the punch, It-is evident that holes, notches, or indentationsof any suitable shape or form can be made with this machine, the punch and die being formed in accordance with the desired form of hole, notch, or indentation.

Having thus described my invention, what I claim as new, and desire to secure by LettersPatent, is-

1. Securing the unch 0 in the bed-plate Bby means of the holder Grand screw a, and making it adjustable up and down by means of the screw 6, substantially as herein showffand described 7 2. The application to the punching machine herein described of the automatic lifter 1', by which the plate is raised off the punch, substantially as and for the purpose herein shown and described. 7 r

3. The bar It, lever 2', and spring is, in combination with the cam g on the shaft D, and with the stationary punch C, all made and operating substantially as herein shown and described.

MORRIS 'SEIFERTH.

Witnesses:

WM. F. McNAMLiRA, ALEX. F. Runners.

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