US29231A - Punching-machine - Google Patents

Description

narran stares raras@ carica J OHN A. BRADSHAY AND A. FRANK COLBY, OF LOWELL, MASSACHUSETTS.

PUNCHING-MACHINE.

Specification of Letters Patent No. 29,281, dated July 2,4, 1860.

T o all whom it may concern.'

Be it known that we, JOHN A. BRADsHAw and A. FRANK COLBY, both of Lowell, in the county of Middlesex and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Punching-Machines; and we do hereby declare that the following is a full, clear, and exact description of the construction and operat-ion of the same, reference being had to the accompanying drawings, making part of this specification, and to the letters of reference marked thereon.

Figure l, is a plan or top view of our machine. Fig. 2 is a side elevation. Fig. 3 is a longitudinal vertical section of the same, through ai, y.

Similar letters of reference in each of the several figures, refer to like parts.

A, is the bed piece or frame, to which the working parts are attached.

B, is the main shaft. The cam O, on the main shaft operates the lever D, which lever, moves the sliding plate E, carrying the con centric punches F and G, up and down. The cam C, is a double cam having one of its throws greater than the other, and as it revolves, the lesser throw operates the small punch F (in manner hereafter described) which punches the hole in the nut or washer. Then comes a rest in the cam, which allows time to move the die plate H, forward, so that the matrice J, shall come under the punch G. The larger throw in the cam then forces this punch down and cuts out the external shape of the nut or washer, at the same time stripping the nut or washer from the small punch. There are two necessary adjuncts to make this operation complete. l One is the wedge L, operated by the lever M. This wedge is inserted at the right time over the top of the small punch so as to cause it to project through the large punch far enough to punch the small hole in the plate, without having the large punch come in contact with the plate. Then when the die plate moves forward, the lever M, being attached to it, withdraws the wedge, and leaves the punch F loose, while the punch G, is doing its duty. The other adjunct is the lever I, operated by the cam K. This lever holds the small punch F (after it has punched the core, and is slightly removed from the die, so as to admit of its passage) near to the surface of the die plate H, so that the plate which is being punched,

shall not be disengaged from F until the die plate has changed its position, and the large punch has begun to operate.

The apparatus that moves the die plate back and forth is as follows: N, is a connecting rod, which connects the die plate with a crank shaft O. The pinion P operated by the sectional gear Q turns this shaft, and the set plate R, attached to shaft O, prevents the shaft from turning when the pinion is out of gear. The sectional gear Q has two sections of teeth, which occupy the same number of degrees in the circumference that is occupied by the two resting spaces in the cam C, so that While the punches are at rest, the section of teeth in gear Q turns the pinion P, half round, and moves the die plate forth or back as the case may be, and then the set rim (vg) of the sectional gear, enters the concavity (c) of the set plate, and holds the die plate securely and exactly in its place while the punch is performing its duty.

The apparatus for feeding the bars or plate to be punched, is as follows: R', is another sectional gear having only one section of teeth; these are arranged so as to move the pinion S, just after the last punch is given to the nut or washer; and while the die plate is moving so as to bring the small hole under the-punch. The pinion S, communicates motion to the feed rolls T, T', by means of gear U, pinion V, cone pulleys X, Y, bevel gears Z, Z', and spur gears (a, The feed is regulated to 'suit different sizes of nuts or washers by adjusting the belt on the cone pulleys X, Y. The upper feed roll T', is held down by a weight or spring so that it may accommodate itself to the different thicknesses of iron.

The contrivance for separating the cores from the nuts or washers after they are punched, is as follows: is a double inclined plane connected to the die plate, between the two matrices, and the cores falling against one side of the inclined plane, shoot into the apartment (c), while the nut or washer falling against the other side of the inclined plane, shoot into the apartment Having thus described our invention what we claim as new and desire to secure by Letters Patent isl. The shifting die in combination with the concentric punches, operated in manner substantially as and for the purpose described.

2. The combination of the Wedge L, and out signatures this ninth day of May in the l0 punch Fin manner substantially as and for year of our Lord eighteen hundred and the pu'lpose set forth. d 1 sixty.

3. T e double incline p ane d or 1 5 equivalent, for the purpose and substantially 1 as described.

4. The feed rolls T, T, operated in the In presence of- Inanner and substantially as described. ALPHoNso DICKERMAN,

In Witness whereof We have hereunto Set O. E. CUSHING.

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