US244945A - Venson - Google Patents

Description

(No Model.)

* WgHfH. STEVENSON 8v J. SOLTER.-

GUT'IINGrA AND PUlIG'HINGr PRESS. No. 244,945. Patented July 26,1881..

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' WILLIAM H. H. s'rEvENsoN AND4 JOHN soLfrEE, 0E BALTIMORE, MARYLAND, 1 AsgsIeNoEs To sTEvENsoN a PLU-NKETT, 0E sAME PLACE.

CUTTING AND Purim-imc PRESS.

Y SPECIFICATION forming part f Letters :Patent N0.\244,945, dated July 26, 1881.

Application filed April 7, 1881. (No model.)

To all whom tt may concern Be it known that we, WILLIAM H. H. STE- VENSON and JOHN SOLTER, ot' Baltimore, and State of Maryland, have invented a new and useful Improvement in Guttinga'nd Punchin g Presses; and we do hereby declare that the following is a l'ull, clear, and exact description of the same.

Our invention is an improvement upon machines for cutting, pressing, drawing, or punching metal plate'of that class .in which the reciprocating head is operated by a lever, and is connected generally to a treadle.

The principal object of our invention is to secure adj ustability in the sliding head or plunger which carries the upper die or punch.

It also has for its object to furnish inexpensive and conveniently operating adjustable connections and stops for the operating-levers Vby which the sliding head is moved. Y

In the drawings, Figure l shows a side elevation of the press. Fig. 2 shows a front view of the adjustable plunger detached.

rIn these drawings, Fig. 1 shows an ordinary form of machine in its general construction, which general construction, therefore, need not be particularly described.

The first part of our invention relates particularly to the construction of the plunger A, which carries the upper die or punch. Heretofore this head or plunger hasbeen made of one piece, and could be moved toward the lower or iixed die only by means of the lever by which it was operated. This improved part of the machine is shown more clearly in Fig. 2. In this ligure the main body of the plunger is represented at A. It may be cast in one piece, and externally is of the ordinary shape, being provided with flanges, preferably of V shape in crosssection, by means of which it is accurately held in guides which permit free vertical movement. This plunger is chambered, as shown at a a, the chamber extending from front to rear. Within this chamber is fitted a yoke, B, fitting accurately, but loosely, at the sides, but made shorter than the chamber of the plunger in which it is placed. The yoke B is recessed also fromfront torear, as shown in Fig. 2 in full lines b b, and in dotted lines c c in Fig. 1. This recessreceives theend of the lever C,

with or without its friction-'wheel d. The wheel d is pivoted between two prongs, e e, of the lever C, and bears against the inner surface'of the block above and below, being iitted accurately thereto. The pronged end of the lever, 55 as shown in dotted lines in Fig. l, is reduced in depth, so as to be less than the vertical measurement 0I" the recess in theA yoke, in or der to prevent the lever from binding against the top and bottom of the recess in its move- 6o ment.

Fixed to the sliding yoke B are two rods, f g. The rod fis iixedin the upper end of the yoke, and extends through a sleeve, h, in the upper cross-bar of the plunger, through which it slides freely. It is threaded, and is provided with nuts it', which, when turned to bear against the ends of the sleeve h, hold the yoke B in any required position within the plunger, or the position of the yoke may be shifted at pleas- 7o u re, within the limits of the chamber of the plunger, by movement ot' the nuts i i. The rod g is iixed in the lower part ot' the yoke B and passes through a hole in the lower part of the plunger, serving simply as a guide for the yoke and may be dispensed with.

It will be understood that the plunger A may receive any suitable die, such as are ordin-arily used on this class of machines, and when ever, for any reason, it be desired to raise the plunger or to lower it, in order to increase or diminish the space between the lower limit of its motion and the lower die or bed-plate, it canbe readily accomplished by turning the nuts i t'.

In machines of this class, in which the lever directly operating the plunger is moved by a treadle-lever, such as that shown at l), it is necessary to have an adjustable stop with a leather or rubber bumper for the treadledever, and adjustable connection between suchv treadle-lever and the lever directly operating the plunger, in order that the movement of the upper die may be accurately determined. We have provided special devices for this purpose, as shown in Fig. 1. The adjustable stop com sists of a piece, E, formed substantially of T shape, as shown in the ligure. It is attached to the lever by vmeans of the pivotal bolt which passes through its longer arm l, while the up- Ico per arm, k, rests against the flange of the leg. A horizontal arm, m, extends directly over the treadle-lever D, and is provided with a rod, n, which passes freely through a vertical hole in the said horizontal arm. The rod u isthreaded, and is held in any position by nuts o o, and is provided with a head,p, with a leather or rubber bumper, which bears directly against the treadle-lever and limits its upward movement. Connection between the levers C and D is formed by a bar, F G, the two parts of which F G are provided with right and left hand screws q r, which work in nuts s s xed upon a hollow sleeve, t. The sleeve t is provided with a hand-wheehfu, and by turning this handwheel the connecting-bar F G may be readily lengthened or shortened.

XVe are aware that adjustable connectingrods are commonly used for various purposes, as well as adjustable stops, and upon these points we desire to have it understood that we limit our claims to the precise devices shown.

Having thus described our invention, what we claim is l. In a metal press, the combination of the z5 sliding head A, carrying a die, the operatinglever C, and the block B, adjustable within said sliding head A, substantially as described.

2. The combination, with a reciprocating slotted head, A, carrying a die, and with the lever C, of the yoke B, having the screw-rod f and the adjusting-nuts h i, as described.

The adjustable stop E, in combination with the rod n, nuts 0 o, and ireadle-lever D, substantially as described.

4. The combination ot' the reciprocatinghead A, the adjustable yoke B, the operating-lever C, and the friction-roller d, as described.

In testimony whereof we have signed our names to this specification in the presence of 4o two subscribing witnesses.

WILLIAM H. H. STEVENSON. JOHN SOLTER.

Witnesses:

JNO. T. MADDOX, D. H. MEAD.

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