US111306A - Improvement in apparatus for opening the eyes of picks - Google Patents

Description

anni Yfila,

ROBERT BLAKEfOF SCRANITON, PENNSYLVANIA.

LettersvPatent No. 111,306, dated January 3x1, 1871.

IMPROVEMENT IN APPARATUS FOR OPENING THE EYES OF PICKS.

The Schedule referred to in these Letters Patent and making part of the same.

I, ROBERT BLAKE, of Scranton, Vin the-couuty of Luzerne and State of`Iennsy1vania, have invented certain Improvements in Dies and lPunches for Opening the eyes of Picks and other tools, and in the method of treating the prepared and punched blank, whereof the following is a specification.

Nature and Object of my Invent/ion.'

The object of. myinvention is to take the blank already punched with what is called a at eye, and open or expand the eye, giving a beveled shape to -the inside of the same from without inward, to facilitate wedgingthe handle; and to accomplish the same at one heat and one handling, iu place of the two heats and twol handllngs required in the present state of the art.

Description of the Drawing.

Figure l represents avertical section of the punch, die, and a drop.

Figure 2 represents a topview of solid block and die.

Figure 3 represents an elevation of the punch, die, and drop.

Figure 4 represents the punched blank in position. Figure 5 represents section of my die, with a punched blank in position. l

Figure 6 represents atop and side view of the punched fiat-eye blank which the m achinev is intended to treat.

Figure 7 represents a top and a side view of the opened eye after it has been treated according to 'my invention.

B designates thev dic-block.

O, the cross-head of the drop.

F, the frame' of the machine.

l, the eye part of the blank.

.0, the straight part of the opening in thedie-block, into which the punch P descends. j

v R, the recess or recesses in the die-block into which the arms of' the blank, iig.(5, are placed.

.The dottedV lines l) b, iig. 4, indicate the depression and defective' results of the present or .common methpresent rude die, with a od; and

l1 l), g. 5, the improved results of my method.

d, iig. 1, designates the point where the die proper terminates.

e e, figs. 2 and 5, the shouldered part ofthe die on which the parts ff of the flat-eye blank, iig. 6, rest when placed to be opened.

General Description. The die proper is an oval-shaped cavity made in a solid block of metal, with daring walls, and of depth slightly greater than that of the eye to be-operated on.

At each of,the two opposite extremities of the die is a notch or" recess in the sloping walls, extending v down tolwithina short distance of the bottom of the same, through which to project the arms ofthe blank; l and from the bottom of the die au opening, of" a size equal to or greater than the die at the bottom d, is continued downthro'ughthe block.

The tapered punch is, in cross section, of an oval shape, corresponding to the oval .shape of the cavity; but its-:taper is much .longer and more gradual than the Hare ot the die-walls, so that when passed down into the die its nearest point of approach to the walls Jthereof will be at the extreme bottom d of'. the die, as

shown at fig. 1. t

The mode of adjusting the blank, and Athe operations ofthe punchand die, are as follows, Viz:

'lhe blank is tion of the eye in contact with and resting on the shoulders e e, gs. 2 and ronly of the die, and the arms projecting'through the notches R, the walls ot' which prevent the eye from turning when the punch descends, but which arms areslightly elevated above the bottoms of said notches, see iig. 5.

The blank being thus placed and supported, the punch, on being dropped orforeed down, will in its' descent gradually open out the eye, impart a downward curvature to the arms by reason of itswedgerlike action against the wallsvof the eye at the two entrem-y ities of the upper and unsupported portion., and` perhaps slighly 'depress the eye, until finally its further descent is arrested by its being wedged at the bight-fl' ot' the die,.or by the cross-bar O reaching a bearing on the die-block.

In the drawing, andpso far in the description, the

opening has been represented as being done before the points are welded on; but it may be donc afterward, and perhaps with increased advantage from the curving'and shaping effect upon the -arms, and from the further consequence that thereupon the implement may be passed, still heated, immediately to the final Shaper, who speedily finishes his part of the work thereto.

As represented, lthe ,punch is fperated'by a drop. It may be operated by-a cam, or any of tle other weil-known devices; but the method ot' actuating the punch forms no part of my present invention.

l, The die and punch respectively, of the form and of the dimensions relative to one 'another andv to the blank to be opcrated'on, herein 'describedand shown.

placedin the die,'the' elongated porl 2. The method. of adjusting the blank in the die to scent, open out the eye transversely and give to it be operated on by the punch, that is to say, its l(t1-.ms the proper forni, :tml at the same time impart tot-he lying in and supported laterally by the walls of the arms a, downward curvature, all as set forth.

notches, but free from Contact with the bottoms there- ROBT. BLAKE. of, and the eye in Contact with the die at two points \Vitnesses: only, (the rounded shoulders at its two extremities,) A. O. BALL,

in virtue of which the tapered :punch will, in its de- ROBERT PRESTON.

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