USRE4448E - Improvement in punching-presses - Google Patents

Description

4 4 4 8 REISSUED JUN 27 1871 UNITED STATES PATENT OFFICE.

MOSES G. WILDER, 0F WEST MERIDEN, CONNECTICUT.

IMPROVEMENT IN PUNCHIpNG-PRESSES.

Specification forming part of Letters Patent No. 65,143, dated May 28, i867 reissue No. 4,448, dated June 27, 1871.

To all lwhom it may concern:

Be it known that I, MOSES G.-WILDER, ofv

West Meriden, county of New Haven and State of Connecticut, have made an invention of certain new and useful Improvements in Presses for Working Metals and for other purposes; and that the following is a full, clear, and exact description and specification of the same.

The principal object of the invention is to enable the punch or moving die to be rapidly and conveniently adjusted to the exact position required relatively tothe stationary die 3 and this is effected, according to my invention, by the interposition, between the punch-holder and that part of the press which receives motion from the source of power by which the press is worked,

of an eccentric controlled by a worm-wheel and a tangent-screw. In the combinations of which these instrumentalities form part the turning of the eccentric varies the position attained by the punch-holder, and the tangent-screw and wormwheel are the means of effecting the turning of the eccentric, and of holding it securely in whatever position it may set.

There are many modes in which the invention may be carried into effect, according to the construction of the press to which it is applied and press embodying the invention in the irst form` in wliich4 it was applied by me.

In said drawing, Figure l represents a side ele-' vation of said press, and Figs. 2 and 3 represent views of, parts' of the press detached from the residue.

. The press, thus represented, has a stock, A, within a bed, B,to which the iixed die is secured. Above the bed is the punch-holder D, which car ries the punch or movable die, and is constructed to move toward and from the iixed die in a tubular guide', C, forming part ofthe stock. The power in this press is applied through a treadle-lever,

K, which is pivoted to the stockA and has a limited range of motion, the stock being constructed with a boss, d', against which a spur, d, secured to the treadle, strikes when the treadle-lever has moved the required distance, so that the further movement of thelever in that direction is stopped. The treadle-lever K is connected with the punchholder D-thrcugh the intervention of power-transmittin g mechanism, composed, in this case, of the lever E, the connecting-rod L, and the pivots or pins c e t' F,'whch connect the lever and the connecting-rod with each other, with the press-stock, with the die-carrier, and with the treadle-lever, the saidpins having` journals upon whichtheparts move. In a press thus constructed I prefer to apply the eccentric to the pin F, which connects the lever E with the press stock, and to this end the .,f

eccentric G is secured` to said pin byl means of a key, a, Fig. 2. So long as this eccentric is held fast in any position the punch-holder will always be depressed to the same point by the movement of the treadle-lever but if the eccentricbeturned, the point to which the punch-holder will be depressed will be varied. The turning of the eccentric, therefore, eii'e cts the adjustment of the punchv holder; and in order that the eccentric may be turned and held as required for the adjustment and operation of the punch-holder the eccentric pin F is fitted with a worm'wheel, H, and a tangent-screw, J, is provided to turn said wormwheel, and the eccentric with which it is connected, through the pin F. The journals of the tangent-screw turn in brackets I', and one of the journals is extended to form a handle,I, by means of which the tangent-screw can be readily turned.

Now, after the dies have been properly arranged and it is desirable to adj ust the action of the movable die or punch relatively to the lower die, it is only necessaryrst to place the foot upon the treadle and with one hand turn the handle I until the action of the eccentric upon the lever shall elevate or depress the movable die or punch to produce the desired relative position to the stationarydie, thus saving a great amount of time and irksome labor, and rendering the machine more desirable vand convenient for use.

I believe I have thus shown the nature, construction, and advantage of this improvement,

s o as to enable others skilled to make and use the same therefrom, and it must be evident to the skilled mechanician that, as the eccentric with being, ofcourse, applied to operate the eccentric its Worm-Wheel and tangent-screw are combined with the punch-holder and transmitting mechanism, the positionof the eccentric in the transmitting mechanismcan be varied Without varyin g its operation-thus, for example, the said eccentric might be 'applied to any one of the other pins or pivots i e e, the Worm-Wheel and tangent-,screw in its newposition, andthe turning of the eccentric will have the same operation in adjusting the position to which the punch-holder is depressed as it has when applied to the pin F; moreover, the Wormwheel and tangent-screw Will operate in the new position of the eccentric, as in the one first described, to move and to hold the eccentric as required. It must also be obvious that the form of the transmitting mechanism of the press can' be greatly varied, Without ceasing to embody the invention, so long as there be between the punchholder and the part of the press to which the power is applied a joint-pin or journal towhich the eccentric can be applied, in connection with the Worm-Wheel and tangent-screw for operating it.

What I claim as my invention, and desire to stock ofthe press, substantially as before set forth.

Witness A. D. 1870.

Witnesses:

J. S. GARLAND, A. E. HICKS.

my hand this 8th day of December,

MOSES G. WILDER.

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