US524691A - Metal-punching machine - Google Patents

Description

(No Model.) 2 Sheets-Sheet 1.

J. B. MoLANE.

METAL PUNCHING MACHINE.

No. 524,691. Patented Aug. 14, 1894.

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(No Model.) 2 Sheets-Sheet J. B. MGLANE. v

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UNITED STATES JARED B. MCLANE, NORTH READING,-MASSACHUSETTS.

METAL-PUNCHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 524,691, dated August 14, 1894.

Application filed June ll 1894- T0 aZ Z whom it may concern.-

Be it known that I, JARED B. McLANE, of

North Reading,in the county of Middlesex and State of Massachusetts, have invented cerpunching sheet-metal and particularly designed for blacksmi'ths use.

The principal objects in view are to secure a powerful machine, to provide for punching one or more holes by one operation, and to provide for adjustment of each punch of a gang employed so as to adapt the machine for a special work. To the above ends the invention consists 1n certain novel features of construction and combinations of parts recited in the appended claims.

The accompanying drawings, which form part of this specification, illustrate embodiments of the invention.

Figure 1 shows a side elevation of a machine embodying the invention, a portionof a certain lever being broken out to disclose Fig. 2 shows a section on line 2-2 of Fig. 1. Fig. 3 shows a'section on line 3-3 of Fig. 1. Fig. 4 shows a modified form of machine in side elevation. Fig.5 showsa section on line 5-5 of Fig. 4.

The supporting frame of the machine as shown in Figs. 1 to 3 comprises a base, a, two uprights, a and a rising therefrom and a horizontal bar, a extending between the said uprights at a suitable distance above the base. Said horizontal bar is provided with a number of vertical bores, 12, which constitute slide ways for plungers, c, carrying the punches, 0. Three plungers are here shown but the number may be more or less accordmg to requirements. The upper ends of the plungers are flattened and are received in a channel, 0 formed in a lever, d, the base of the channel arranged to bear on the upper ends of the plunger so that upon depress ing the lever the plungers will be lowered". The plungers are pivotally connected with the lever by pins, 01', passed through the latter and the plungers, and the upper ends of the'latter are rounded so that the lever can rock thereon to the extent required by its arc Serial No. 514,177. (No model.)

movement. Provision may be made in different ways for taking up the arc movement of the lever to prevent any binding of the plungers in their slide-ways. For example, the lever may be pivoted to a movable sup port, as the links or radius bars, e, shown in Figs. 1 and 2, said links being pivoted to the base, a, and free to swing sufficiently to permit free rectilinear movement of the plungers. Another way of accomplishing the same result is by slotting the plungers where the pins, 01', engage them, as shown at 01 In this case the radius bars can be dispensed with and the lever pivoted to a stationary support, as in the form of machine shown in Fig. 4.

The lever, 01, is depressed by a cam-disk, f, of circular form, journaled eccentrically on a bolt,f, which is supported between the upright, Q of the supporting frame, and an auxiliary standard, The cam-disk is formed in one side with an annular groove, f concentric with its periphery and the outer side of said groove forms ashoulder for lifting the lever, a hook or linlnf, forming the'connection by engagement of a lug, f on its upper end with the annular groove in the cam-disk and engagement of a lug,f"', on its lower end with an offset, (1 in the lever. It will be understood that the liftingof thelever through the means just described, raises the plungers through the medium of the pins, 01'. The cam may be operated by hand or by power and is here shown arranged to be operated by hand through the medium of adetachable lever, g. The latter has one end constructed for insertion in a socket formed radially in the disk,

and a spring latch, g, is fastened to the lever and adapted to take over the flange formed by the groove, f and hold the lever in place.

It will be seen that the devices described provide very powerful means for depressing the punches. A die-bed, h, is mounted on the base, a, below each plunger and each die-bed is adjustable so as to accommodate different punches which may be fitted to the plunger.

The base, a, is formed with an upstanding back-flange, a and set-screws, 7b, are entered through'said flange so as to bear against the rear-sides of the dies. Flanged clamping plates, 71. are fitted against the front side of the base, a, and bear against the front sides work but one after the other, which does not require so great expenditure of power.

. Of course it is not necessary to use all the punches at once, but any one of them can be used independently and if the plungers of those not used are located so near the one in use as to encounter the work, these punches can be removed from theirplun'gers.

A modified construction is illustrated in Figs. at and 5, in which provision is made for adjustment of the plungers as to their distance apart.- The supporting frame and devices for operating the plungers are of substantially the same form and arrangement as previously explained. In this case, however, the lever is pivoted to a rigid arm, a of the supporting frame, and is formed with a longitudinal slot, 01 which receives the pivot pins, (1 of the plungers, said slot being of suff cient extent to allow for lateral adjustment of the plungers and also for the arc movement of the lever. Each plunger fits through a separate guide, 0, and these guides araadjustably supported on the horizontal bar of the supporting frame, the said guides each having a square shank, 0", engaging a slot, 0 extending longitudinally of the bar. Bolts, 0 entered through the guides and their shanks carry washers, 0 extending over the supporting bar, and nuts, 0- beyond said washers.

clamped at difierent positions. A machine By this means the guides may be scribed may be variously modified within the scope of the invention.

In Figs. 1 and 2 I have shown shearing blades, p and p, affixed to the lever, d, and bar, a, respectively.

What I claim as my invention is as follows: 1. A metal-punching machine comprising in its construction, a base supporting one or more dies, uprights at opposite ends of said base, a lever pivoted at one end to one of said uprights and extending alongside theother upright, a cam pivoted to said latter upright and coacting with the lever, one or more plungers connected with said lever, and a suitable guide for the plungers.

2. A metal punching machine comprising in itsconstruction, a base supporting one. or more dies, an upright pivoted to one end of said base, a rigid upright at the opposite end of the base, a tever pivoted at one end to the upright, a cam pivoted to said latter upright and designed to bear with its periphery uponthe lever, said cam having a lifting shoulder, a link having a lug at one end taking over the said shoulder, and a lug at the other end extending under aportion of the lever, one

or more plungers connected with the lever,

and a guide for said plungers.

4. In a metal punching machine, the combination of a lever, a gang of plungers independently and adj ustably connected with said adjustable on a suitable support.

In testimony whereof I have signed my name to this specifioatiomin the presence of two subscribing witnesses, this 7th day of June, A. D. 1894.

JARED B. MOLANE.

Witnesses:

O. F. BROWN, A. D. HARRISON.

lever, and a separate guide foreach plunger

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