US262155A - Drop-hammer - Google Patents

Description

l (No Model.)

A. VUILLIBR.

DRU? HAMMER.

Patented Aug. l, 1882.

UNTTnn STnTns PaTnNT @errent AIM VUILLIER, OF PORTLAND, CONNECTICUT.

SPECIFICATION forming part of Letters Patent No. 262,155, dated August 1, 1882.

Application filed April 24, 1882.

To all whom it may concern Be it known that I, Anni; VU1LLIER,of Portland, in the county of Middlesex and State of Connecticut, have invented a new Improvement in Drop-Hammers5 and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description ot' the same, and which said drawings constitute part ot' this specication, and represent, in-

Figure l, a front view, and in Fig. 2 a side view, of the device hereinafter described.

This invention relates to an improvement in that class of drophammcrs such as are used for stamping purposes. This class ot' drops employs a lil'ting mechanism, which operates a crank connected by a strap to the hammer, the crank raising` the hammer, then, as it throws over, leaves the hammer free to drop on the descent ot the crank. The mechanism is arranged so as to catch the crank in its up position. This mechanism is too well-known to require any detailed description in this application. In the use of this class ot' drops serious accidents occur to the workmen because of the accidental descent of the hammer. The mechanism is operated usually by a treadle, or may be by a hand-lever, audit by accident this mechanism be disengaged the hammer drops lo its full extent, and nothing can arrest it until it strikes its blow.

The object ot' my invention is to provide this class ot` drop-hammers with a sat'ety device which will prevent the hammer accidentally dropping; and it consists in a stop-lever hung below the hammer, so as to be turned into the path ofthe hammer, so that when the hammer rests upon it it will be supported in that position, and from which it can only be relieved by the removal ot' the lever, combined with mechanism for operating the said stop, as more fully hereinafter described.

A represents the hammer, ot' usual form, arranged to move up and down between guides B B; U, the strap which connects the hammer to the crank or lifting device above.

D I) are two stop-levers, one arranged at each side, hung upon a pivot, a, below and near the anvil. They extend up so as to swing out and in-that is, toward and from the hammer-as (No model.)

indicated in broken lines, Fig. 2. The upper ends ot' these levers, when turned inward, as seen in Figj2, stand in the path ofthe descendinghammer, and so that a shoulder or projection, l), thereon will strike upon the upper end ot' the stops and be there held; but when turned outward, as seen in broken lines, Fig.

2, then the stops are free from the hammerV and permit it to fall. To thus operate the stoplevers D, a short shaft on which is a hand-lever, E, is hung to the frame, as at e, and from this shaft an arm,f, extends up into engagement with the lever D at one side, as seen in Fig. l. Hence pressing down the hand-lever E, as seen in broken lines, Fig. 2, will force the stop-lever D outward, as also indicated in broken lines.

Beneath the heel ot' the stop-levers D, and outside the pivot, a spring, h, is arranged, the tendency ot' which is to force the levers inward, so that as the hammer rises, it1 otherwise tree, the stop-levers will. be automatically forced inward and beneath thc hammer. In order that the one lever may operate the two stops, I arrange a rock-shaft, F, above, from which an arm, t', extends down into connection with the levers, as shown. Hence as the handle is pressed down at one side and the lever upon that side turned outward it correspondingly turns the arm 1', and with it the shaft F, and through the corresponding rod i upon the opposite side the other stop-lever D is given a corresponding movement. One stop, however, may answer the purpose in light hammers; but I pret'er two in all weights of hammers, but especially in hammers of heavy weight.

It often occurs that the hammers are required to be suspended for change, repair, or arrangement ot' dies, and in order to lock the hammer in its up position while such work is being done, that no accident can possibly occur, I provide a catch for the hand-lever E, (here represented as a rod, m, hung to the frame, as at 11,) so as to be hooked into or beneath the handle, as at 'r. Thus secured, the hammer cannot be disengaged. y

The upper end ot` the stops must or should be held below the highest point of elevation ot' the hammer, as indicated in Fig. 2, so that the weight ofthe hammer may be taken from the stops by the lifter before the stops are Withdrawn. Otherwise the withdrawal ot' the stops would require considerable power.

The hand-lever E may be the lever by which the lifting mechanism is engaged. In this case the usual rod, H, is attached directly to the handlever, as seen in Fig. 2.

I claim- 1. In a drop-hammer, the combination therewith of the hinged stop-lever D, arranged to be turned into or away from the path of the hammer, the hand-lever E, in connection with said stop, and a catch to hold the stop in its active position, substantially as described.

2. In a drop-hammer, the combination of the two stoplevers D D, one arranged at each side,

AIME VUILLInn. 4

'itnesses:

VVV. \V. Con, H. J. HILLIARD.

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