US385018A

US385018A - wiswall

Info

Publication number: US385018A
Authority: US
Publication date: 1888-06-26
Anticipated expiration: 1905-06-26

Description

(No Model.)

H. STEWART 8v W. B. WISWALL. y

SPRING HAMMER POR BLAGKSMITHS.

No. 385,018. Patented June 26, 1888.

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WW1/maw@ 4HENRY STEVART AND WELLINGTON B. WISWALL, OF LONGMONT, COLORADO.

SPRlNG-HAIVIIVIER FOR BLCKSIVIITHS.

SPECIFICATION forming part of Letters Patent No. 385,018, dated J'une 2G, 1888.

Application filed April 30, 1888.

To @ZZ whom it may concern.-

Be it known that we, HENRY STEWART and WELLINGTON B. WrswALL, lof Longmont, county of Boulder, and State of Colorado, have invented a new and useful Spring-Hammer for Blacksmiths, and we do hereby declare that the following is such a full, clear, and exact description of the invention as will enable any person skilled in the art to which it belongs to make and use the same, reference being had to the accompanying drawings, forming part of this specification.

Our invention relates to spring-hammers or power-hammers for blacksmiths, and has for its object the production of a device that will greatly lessen the amount of physical exertion necessary to operate it; and it consists in combinations and devices that will be hereinafter fully specified.

Referring to the accompanying drawings, Figure l is a side view. Fig. 2 is a rear end view. Fig. 3 is a top or plan view.

The saine letters of reference refer to the same or corresponding parts.

G is a block or base supporting the anvil F.

M is a `base-piece, preferably a casting, se cured to the floor by means of lag-screws or by any suitable means. Upon this base is swiveled a block, M', which is also preferably a metallic casting, Lbeing the swivel-bolt. Into a mortise or slot in the block M sets the foot of the standard E, upon which are adjustably secured by means of bolts cl d the bearing-pieces DD, which are also preferably metallic castings. Material, however, is not of our invention, as this standard, the bearingblocks, and many other parts may be made of hard wood or any suitable material. The object of making these bearing-pieces adjustable vertically, as shown in Fig. l, is to adjust their height to that of the work, to anvils of different heights, and so on.

In the bearing-blocks D is pivoted the rod C, to which the hammer-handle B, carrying the hammer-head A, is secured in any well-known manner. Hammer-handle B and the rod C may be welded together, if of malleable iron, or they may be cast in one piece; or, if wooden, they may be united in any way common to a skilled workman.

The object of swiveling the standard E and Serial No. 272,251. (No model.)

at one end, while its other end is furnished with a short bend or arm; or it may be furnished with abutton or knob-like head, which fits into the aperture or slot K in the block K. This block K is firmly bolted to the anvilblock G. An arm, H', extends from thelever H to the lever J, to which it is pivoted, the lever J being itself pivoted to the block K; or it would answer, ifproperly shaped, to be pivoted to the swivelblock. The lever J is at its lower end furnished with several holes, as seen in Fig. 2. The motion of the upper end of said lever J will throw the standard E, and hence the hammer, from one position to another, and the turning of the standard will be greater or less, according as the arm H is pivoted in one or another hole in the lever J.`

It is our intention to adapt our device to be used with anvils already in use in workshops, and as these differ materially in size it is necessary to adapt the amount of swing of the hammer from side to side to the size of different anvils. This lever J may be furnished with a tooth to take into a rack fastened on the anvilblock; but we find that the friction between the lever H and the walls of the slot K is sufcient to retain the lever wherever it may be set.

O is the operating-lever. As shown, it is to be operated by the foot of the blacksmith,who holds the work upon which he is operating. Connecting the rear or projecting end of the hammerhandle with the hook N, which is preferably secured to the part M, is the spiral or coil spring I', and the spiral spring I connects as a pitman the hammer-.handle and the foot-lever O. Ve have shown these as coilsprings. Of course they might be iiat or leaf springs, as any spring in these two places would be within our invention; butwe find spiral or coil springs to answer our purpose best. Hitherto a spring has been used as we use the spring l to throw up a hammer after it has been thrown down by means of a pitman-rod ICO or chain; but we are not aware that prior to our invention any one has ever used aspringptman, and herein resides the great power of our hammer. lVhen once the hammer has been thrown down to give ablow, the recoil of the spring I, assisted by the retractile energy of the spring I' whichhas just been expanded by the descent of the hammer, starts the ham-- mer quickly upward again. This upward motion ofthe hammer extends fully the spring` l, and permits the other spring, l', to contract to its normal or even beyond its normal condition by reason of its elasticity and the mo inentum imparted to it, and hence their united force again throws the hammer down, striking a blow whose momentum exceeds anything that we have Yever known by any other than our invention. After the first two or three strokes of the hammer a man can, without4 lifting hs foot from the floor, but by simply working his toes up and down as his heel rests on the door, strike a tremendous blow, the springs by their rebound keeping the hammer in activity.

Having thus described our invention, what we claim as new, and desire to secure by Letters Patent of the Unit-ed States, is-

1. The combination of the support, the hammer, the operating-lever for the hammer, the spring to throw up the hammer after the blow has been struck, and the spring-pitman, all substantially as deseribed,and for the purposes set forth.

2. The combination of the hammer, the support therefor, its several connections with the floor, and means for adjusting the support so that the hammer may be thrown to strike on fuller or face of the anvil at will, as described.

3. The block M, the block M', swiveled therein, the standard or support E, secured in the block M' and carrying the hammer, the levers H and J, the block K K', and the footlever O, all in combination, substantially as described.

4. The combination of the standard E, earrying the hammer, the base-blocks M M', in

which the standard is swiveled, the adjusting-Y lever I-I J, and the block K K', with the footlever O and the springs I I', all substantially as described, and for the purposes set forth.

5. The combination ofahammer, an adjustable support for the hammer, so that the hammer may be swung to deliver its blow at different points in a horizontal plane, a springpitman to operate said hammer, and a recoilspring to throw up the ham mer aftereach blow is given, substantially'as described, and for the purposes set forth.

' In testimony that we claim the foregoing we have hereunto set our hands, this 23d day of April, A. D. 1888, in the presence of two witnesses.

Witnesses:

FRANK L. SMITH, B. L. CARR.