US588422A

US588422A - gruber

Info

Publication number: US588422A
Authority: US
Publication date: 1897-08-17
Anticipated expiration: 1914-08-17

Description

MECHANICAL 0R DROP HAMMER.

No. 588,422. Patented Aug. 1.7, 1897.-

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C. GRBER. lvLLGHANICAL 0R DROP HAMMER.

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C.- GRUBER. MECHANICAL 0R DROP HAMMER. No. 588,422. Patented Aug. 17, 1897.

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PATENT Fri-cn.

CARL GRBERQOF SCHVERTE, GERMANY.

MECHANICAL OR DROP HAMMER.

' SPECIFICATION forming part of Letters Patent No. 588,422, dated August 1'7, 1897'.

` Application filed May l1, 1895. Serial No. 548,922. (No model.) Patented in England March 22, 1895, No. 6,014, and in i Germany December Z8,1895,N0. 84,637.

To all whom it may concern/,-

Be it known that I, CARL GRBER, manufacturer, residing at No. 10 Speckelbruch, Schwerte, Westphalia, Germany, have invented a Mechanical or Drop Hammer, (for which I have obtained a patent in Great Britain,'No. 6,014, dated March 22, 1895, and a patent in Germany, No. 84,637, dated December 28, 1895,) of which the following. is a specilication, reference being had therein to the accompanying drawings.

The present invention relates to a mechanical hammer or apparatus designed chieiiy for forging small work of varied section and certain articles made in large quantities, such as screws, horseshoes, snaftles or bits, stirrups, or the like.

The invention is illustrated in the accompanying drawings, in which- Figure 1 is a side elevation, Fig. 2 a front elevation, and Fig. 3 a plan, ofthe mechanical hammer. Y Y

A framing or support a carries, by means of columns b, a frame c, the horizontal parts of which carry adjustable sleeves e, in which the gravity-hammers ol are guided.

The machine comprises a greater or less number of hammers loperated by one and the same mechanism, according to the size of the work and the articles to be produced. In the apparatus illustrated inthe annexed drawings eight hammers are employed, the tops .or heads of which are provided with removable dies g, to which correspond suitable removable dies g', which are let intoa common anvil and are carried by the framing or support a. I

The cavities in or formation of the dies clorrespond with the articles to be produced and are so arranged' that the article is merely roughed out by the first hammer-that is to say, is forged ou t in mere ou tlines-and is then forged by the second hammer more nearly to its finished form, and so on till the article is finished. off by the last hammer, and it may be also cut off thereby. A

Articles forged with these hammers and according to this method have many advantages-for instance, they are finished or made without any ridges. This mode of working necessitates a mechanism for controlling the hammer which can be easily and securely operated by the person holding or manipulating the article or work under treatment. is effected according to the present invention in an extremely simple manner.

Mounted on the frame c and keyed fast on a shaft k is a wide drum c', (the width being proportionate according to the mechanical hammer,) which is kept continuously revolvingby means of fast and loose pulleys l or in small-sized plants by means of a crankhandle., y

Foreach hammer there is placed on the drum a strap, belt, or rope or equivalent h, one end of which is connected at m to the ham mer and the other end atn to a verticallyguided rod o, which is connected to a bent lever p, pivoted to the framing o.. This lever p is operated by means of a rod q and a bent foot-lever or treadle r, whereby the rod is raised or depressed. A spring s or similar device serves to keep the rod o normally in its highest position and consequently the belt h loose on the drum. The drum rotates contin uously in the direction indicated by the arrow in Fig. 1.

By treading upon r the corresponding rod ois drawn down and the respective belt or equivalent h, attached thereto, thereby drawn tight, so that it bears rmly upon the drum c', and thus raises the hammer. After the treading has taken place the spring s raises the rod o again, whereby the belt h is rendered loose, and the respective hammer d falls down.

That end of the rod q which is nearest to the bent lever p is provided, as is also the bent lever p, with a number of holes to enable thestroke of the said lever to be varied 'with the same height of tread, so that the stroke of the rod o can be lengthened to a greater or less extent and the height of fall of the hammer be varied more or less, as desired.

There is advantageously provided on one side of the machine a .heavier hammer, such as t, which is employed for rough forging and for other heavy work. This hammer tin the example illustra-ted is mounted by means of a frame u on the frame c and is driven from a special counter-shaft o with fast and loose pulleys w.

This l IOO For this purpose a cam or tappet fr is Ixed on the shaft yz; and takes under an antifriction-roller fy, carried on the guide-rod of the hammerl t.

In order to increase the action of this hammer, there is provided at the end of the hammer guide-rod a springI z, which is placed under strain when the hammer is raised, and which, as soon as the roller y is clear of thc tappet, forces the hammer downward with greatly-increased force.

A locking-bolt K, which is held by a hook K2 while the hammer is working, is adapted to be passed through a slot in the hammer guiderod and to take into a suitable recess K in the frame u for the purpose of holding this hammer in its highest position when desired.

That I claim, and desire to secure by Letters Patent of the United States, is-

l. A mechanical hammer comprising a frame, a hammer-rod 1f, movable vertically in bearings in said frame and having a sleeve at its upper end, the double spring 2, having one of its arms connected to the frame above the rod i, and its other arm extending loosely7 through the sleeve on said rod, the antifrietion-roller carried by the rod the shaft n, and the tappeton said shaft for engaging the antifriction-roller, substantially as specified.

2. A mechanical hammer comprising a frame having the recess K', the hammer-rod 1f, movable vertically in bearings in said frame and having a sleeve at its upper end and the hook K2, at an intermediate point of its length, the double spring .2', having one of its arms connected to the frame above the rod l, and its other arm extending loosely through the sleeve on said rod, the antit'riction-roller carried by the rod i, the shaft i', the tappet on said shaft, for engaging the antiEriction-roller, and the hook K, loosely connected to the hammer-rod '15,' said hook being adapted to enter the recess K', in the frame and thereby hold the rod against vertical movement and being provided withl a ring for engagement with the hook K2, when the hammer is in operation, substantially as specilied.

In a mechanical hammer, the combination of the frame, the continuously-rotating drum mounted on a shaft journaled in said frame, a vertically-movable hammer-rod arranged in bearings in said frame, a flexible strap connected tothe upperend of the hammer-rod and extending over the drum, the bell-crank, pedal-lever r, fulcrumed on the frame at the base thereof, the bell-crank lever p, also fulcrumed on the frame, and having one of its arms connected with the ilexible strap, the link connecting the other arm ot the lever 2J, and one arm of the pedal-lever r, and the spring connected at one end to said link and at the other end to the frame, substantially as specified.

In witness whereof I have hereunto set my hand in presence of two Witnesses.

CARL GRBER.

Witnesses:

F. II. STRAUss, A. STRAUss.