US88980A - Improved power-hammer - Google Patents

Description

T. T. PROSSER. POWER HAMMER.

No. 88,980! Patented Apr. 18, 1869.

TREAT T. PROSSER, OF CHCF'GO, ILLINOIS. Letters Patent No. 88,980, dated April 13, 1869.

IIEPRO'VED POWER-HAJMME The Schedule referred to 1n these LettenPatenrand makinpart Tthe same.

To-all whom'. fit/m14] com-em:

Be it known Athat I, TREAT T. Pnossnr., of the city of Chicago, in the county of Cook, and State of Illinois, have invented a new Mode of Constructing and Operating Power-Hammers; and I do hereby declare that the following is a full and exact description thereof', reference being had to the accompanying drawings, and tothe letters of reference marked thereon, and the drawing making a part of this specification.

Figure 1 is a. side elevation of my improved power# hammer.

Figure 42 is a top view of the same.

Figure 3 is a vertical longitudinal section on line y y of iig. 4.

Figure 4 is a horizontal section on line :tx of fig. 1.

Figure 5 is a horizontal -section on line zz of fig. 1.

The same letters of reference, where they occur in the drawings, .denote identical parts.

My invention relates to that class of machines known as power-hammers, and consists in a combination and arrangement of devices for 'communicatingthe power to the hammer; also, in the arrangement for hanging, operating, and controllingthe hammer, and the changing of the hammer-dies, both in the hammerfhead and in the anvil; also, in the mode of constructing the frame, and of attaching the working-parts thereto.

To enable others skilled Ain the art to make and use my invention,`I will proceed to describe its construction and operation.

In order to obtain the greatest durability and economy, I construct the frame in the manner shown in iig. 1. A A are two cross-pieces, or sills, which form v the base of the machine-frame.

B B, in the same figure, are two posts, which are both tenoned on the lower end, and are inserted into a mortise in the-centrepof the sills, so as to occupy an upright position, and to be in place to receive the balance of the timbers composing the frame.

'.Bolted on to each side of the posts B B are two longitudinal pieces, O C, forming the side timbers to the frame.

It will be seen that I construct the rear post longer than the front one, so as to receive the cap,or crosspiece D, on its upper end. By thus arranging the frame, it will be seen that all parts are in position to receive the ,working-parts of the machine, andform a durable and most perfect arrangement therefor.

On the upper end of the front post, and attached thereto, is` my anvil-block F, containing the die E, which, it will be seen, is'made adjustable, 'and is easily removed.-

Upon the upper and lower side of each end of the cap, or cross-piece D, are fulcrum, or pivot-boxes G G G G, to VAreceive the pivots H H, passing through the vibrating arms I and I, which are connected together and held in position by the springs .Il J and boltsKKKK.

Itwill be seen that the arms I I are in pairs, and

that the lower pair of armsi's shorter than 'the upper pair. And it will b e also seen that the arms'are in each pair much further apart at the rear end than at the other, or front end; and also, that the rear ends of each pair are not connected, whilst the front ends are.

The lower pair of arms is connected at the front end by a noddle p'in, l, and thevbolts m.

In the middle of the noddle-pin l is a box, n, to which the pitman or eccentricrods are attached that vibrate the arms I' and I, by means of the eccentric O, ori the shait P, which is connected to the short arm of the levers q q, wbichlevers are pivoted at R, and, as 'the eccentric is driven by the friction-wheels Srs S S,it will 'be evident that, as the foot `is placed on the footboard-T, the shaft P will be 'caused to vibrate, and to bring the wheels in contact with those driven by the belt u, and as the pressure of the foot on the foot-board T causes an increase of friction, the vibrations are caused to correspond therewith, and as the hammer is moved up and down by these vibrations, it will beevi-- dent that the faster the vibrations `are the 'harder the hammer will strike, and the slower they are the lighter blow the hammer will strike. And asthese motions are under the control of the operator, by means of the footboard Tand lever q, the machine can be make to strike j ustsuch a blow as the operator may desire.

It will be seen that the 4upper pair of arms is longer thanthe lower arms, and their front ends are permanently attached together by means of two plates, u u, through which the hammer-shank passes, and to which it is attached, bym ans of the nut,.V, on the upper end of the hammer-sha k. p

The hammer-shank, near the hammer W, is square, and thc hole in the plate, on the under side of the arms, through which it passes, made to correspond therewith, whilst the hole in the upper plate is or may be round.

The object of making the hole in the lower plate square, and the hammer to correspond, is to prevent the hammer turning when in use.

By connecting the lower arms to the upper arms, by means of the springs, it will be evident that the inertia of the hammer, when at rest, and the recoil, when at work, are overcome iny such a manner as to relieve the machine from those violent shocks incident to the common tilt-hammer, and to convert them into useful effect; for as the hammer is thrown up by its momentum to a greater distance than the movement ofthe eccentric, an increased amount of tension is imparted to the forward springs, and when the' hammer descends, the increased tension causes it to descend with an increased velocity and additional force, thus being enabled to strike a much quicker and harder blow than can be done by the machines now in use. And as the springs admit of a ready adjustment', by means of the bolts and nuts, it can be readily adj usted to a rapid or slow motion, as desired. And as the'shock consequent on a vibrating motion caused by a reverse movement is all-taken up'by the springs, its motions are all easy, and cannot fail to be durable, the importance of which must be evident to all who are acquainted with the vast amount of labor performed by this cin-ss of ma.- chines.

Having thus described my invention,l

What I claim, and desire to secure by Letters Perf ent, is Y v 1. The'combination and arrangement. of the two pairs of arms, l I', springs J, and hammer W, with the fulcrum D, or it-s equivalent, substantially es shown and described, as a consequence of which arrangement the vhammer is carried from the anvil by one pair of the springs, and returned thereto by means of the other pair.

2. In ycombina-tion Wi'fh the vibrating arms of a power-hammer, the eccentric O, with its connectingstraps and rods, the friction-wheels S S, and levers q q, for the purpose of regulating the blows of the hammer W, substantially in the manner described and shown.

' TREAT LYPROSSER.A

Witnesses:

- HENRY WALLER, Jr.,

R. N. EAGLE.

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