US405072A - Steam-hammer - Google Patents

Description

Patented June'll, 1889.

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ITI/newton (No Model.)

J.H. 1BLA'KE. STEAM' HAMMER.

winesses N4 PETERS, Phololilhogrzphor. Washinginn. D. C.

UNITED STATES- PATENT UEEICE.

JOHN H. BLAKE, OF DEERING, MAINE.

STEAM-HAMMER.

SPECIFICATION forming part of Letters Patent No. 405,072, dated .Tune 11, 1889.

Application filed March 9, 1889.

To @ZZ whom, t may concern:

Be it known that I, JOHN II. BLAKE, of Deering, in the county of Cumberland and State of Maine, have invented certain new and useful Improvements in Steam-Hammers; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

My invention relates to improvements in steam-hammers, and pertains more especially to mechanism for regulating the operation of the valve in the steam-chest, for regulating the supply of steam on top of the piston and thereby the force of the blow, and for preventing the breaking of the bed-plate.

In the drawings herewith accompanying, Figure l is a side elevation of my improved hammer, certain parts being removed; Fig'. 2,-

a cross-section of Fig. l on line l l. Figs. 3 and 4 are details showing nut-lock, and same letters refer to like parts,

The helve a is mounted on a trunnion c, either directly or in a husk or sleeve awhich is mounted on the trunnion. The trunnion c is journaled in the standards bgupon the bedplate Z). Upon thebed-plate at the end is the anvil f, and over the anvil and attached to the helve is the hammer propere. The block g, behind the standards b2, serves to limit the upward movements of the hammer.

In front of the standards and beneath the helve is a cylinder t, having piston d and piston-rod c. The piston-rod is connected with the cross-head b, and said cross-head is attached to the helve or husk, as seen in Fig. 2. At the side of the cylinder is a steam-chest u, in which is valve x and valve-stem w. From the steam-chest ports y and z lead into the cylinder, port y above the piston and port 5 below. The steam-chest has also-the supply-pipe o and the exhaust s. The valvestem w extends upwardly, passing through the vertical hole n in the block o', and has the horizontal slot p and the bolt e passing through stem and slot p. The block o has a horizontal groove f. In groove fdruns a horizontal slide p, having therein a slot r.

Serial No. 302,696. (No model.)

The slide p passes through the slot p in the stem fw, and the bolt e passes through the slot r in the slide, as seen in Fig. The slot r is horizontal at each end and inclined in the middle. In the end of slide p is a slot q. Attached to slide p by a bolt free to move up and down in slot q isl a lever o. The lever o is pivoted at its lower end on a rod n, having the arm m. Pivoted to the end of the arm 'In is an upright rod h, with a screw-thread cut on its upper end. An arm d is rigidly attached to the trunnion c, having on its outer end a pivoted clasp z', through which the vertical rod h passes. On the rod 71, is a nut j above the clasp and a nut Z below said clasp. The nut la below the clasp should have a nutlock to hold it securely in any given position. This lock may have the form shown in Figs. 3 and 4t, in which o" is a groove in the rod, k the nut, Z the lock having linger Z adapted to enter groove i', and j a spring constantly tending' to hold the iinger clutched in the groove o". Vhen the bed-plate is made solid, it requires a great amount of metal to prevent it from breaking. In order to secure lightness combined with strength, I make the bedplate with one or more hollow places h', extending longitudinally, as shown in Fig. 2.

My invention having now been fully described, I will proceed to explain its operation.

The hammer being in the position shown in Fig. l, the steam enters the steam-chest, passes through port into the cylinder, and forces the piston upward, the piston-rod driving the hammer upward until it reaches the position shown by dotted lines in Fig. 1. The upward movement of the hammer turning on the trunnion c raises arm d, and with it the rod 7L, an d thus throws forward the lever o and the slide .p through slot f in block o. The inclined slot r, in which bolt c of the valvestem runs, raises the said stem and the valve cc the distance between the two horizontal ends of the slot r, which distance should be just sufficient to open and shut the ports y and .e alternately. This means of operating' the valve c prevents any strain onthe valve, and also prevents the valve from getting too far below or too far above the ports, because as soon as the hammer is raised sufficiently to open the ports the valve ceases to rise, in-

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asmuch as the end of slot fr is horizontal. In order to regulate the downward blow of the hammer, I introduce into the port y, through which steam enters the cylinder on top of the piston, a shut-ofi valve a2, which should be adapted to shut oit the port f z/ gradually to any desired extent. The form or shape of valve a2 is not essential so long` as it will Vclose to a greater or less extent, as desired, the port y. To regula-te the length of each stroke of the hammer, I place nutsj and 7u the one above and the other below the clasp 'L' on rod L.

IIavin g thus described my invention and its use, what I claim, and desire to secure by Letters Patent of the United States, is

l. In a steam belve-hammer having a bedplate and supporting-standards, a belve-hainnier mounted on a trunnion journaled. in said standards, a stean'i-cylinder with piston and piston-rod, a cross-head connecting piston-rod and helve, a steam-chest with ports opening into the cylinder one above thc other below the piston, a valve adapted to open and close the ports alternately, and a valve-stem adapted to move up and down in a stem-hole in a fixed block, said stein having a vertical slot therein, the combinatioinwith said stem,oi` a horizontal slide moving in said block and passing through the slot in the valve-stem, said slide having a slot therein, as described,

to operate the valve, a lever attached to said slide, and a vertical rod attached to an arm on the lever, said rod being operated by an arm rigidly fixed on the trunnion, all substantially as and for the purposes hereinbe'tore set forth.

2. In a steam -hammer having cylinder` piston, piston rod, cross -head connecting helve and piston-rod, a steanrchest with ports opening one above the piston the other below, a valve adapted to open and close said ports alternately, a valve-stem running in a lixed block 0, as described, the combination, with horizontal slide j), having. slot r, lever o, attached to slide p in slot q, rigid arm m, attached to lever o, vertical. rod 7L, attached to arm m and having a screw-thread at the top, and arm (l, rigidly set on trunnion c and having the pivoted clasp i', of nuts j and It, the one above the other below the clasp t, substantially as and for the purposes hcrcinbefore set iorth.

In testimony that I claim the foregoing as my own I affix my signature in presence of two witnesses.

JOHN ll. BLAKE.

lVitncsses:

LEVI O, VERRILL, ELGIN C. VERRILL.

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