US233188A - William o - Google Patents

Description

(No Model.)

W. 0. BABE. Valve Gear for Steam Hammers. No. 233,188. Pateyted Oct. 12, I880.

I L? y 5 if MPETEHS, PHOTO-LITHOGRAPNER. wMmmGmNv D c.

UNITED STATES PATENT Farce.

WILLIAM 0. BABE, OF JERSEY CITY, NEW JERSEY.

VALVE-GEAR FOR STEAM-HAMMERS.

SPECIFICATION forming part of Letters Patent No. 233,188, dated October 12, 1880.

Application filed September 14, 1880. (N 0 model.)

To all whom it may concern:

Be it known that I, WILLIAM C. BARR, of Jersey City, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Valve-Gear for Steam- Hammers, of which the following is a specification.

My invention relates to that class of steamhammers in which is comprised a rock-shaft provided with an arm connected with the valve for working the same, and with a slotted arm or lever which engages with a pin or projecjection upon a reciprocating part of the hammer; and its object is to adapt the piston of the hammer for working with a short stroke in either the lower or upper part of the cylinder, so as to provide for delivering blows rapidly upon either thin or thick work.

To this end the invention consists in the combination, with the valve and a reciprocating part of the hammer, such as the hammerhead or piston-rod, of a rock-shaft for operatin g the valve, devices for oscillating said rockshaft from the said hammer-head or piston-rod, and a hinged bracket containing the bearing for said rock-shaft, which enables the rockshaft to be moved upward and downward to raise or lower the valve in the valve-chest, so as to cause the supply of steam below the piston to be cutoff more quickly than the supply above the piston, or vice versa, whereby the desired result is attained.

The invention also consists in details of construction to be hereinafter described.

In the accompanying drawings, Figure 1 represents a central vertical section of a cylinder and valve-chest and a side view of the valve-gear of a steam-hammer embodying my invention. Fig. 2 represents a side view, at right angles to Fig. l, of the lower portion of the hammer, including the valve-gear. Fig. 3 represents a horizontal section upon the dotted line a: m, Fig. 1; and Figs. 4 and 5 represent, respectively, aplan and side view of the hinged bracket, the rock-shaft, and their appurtenances, upon a larger scale.

Similar letters of reference designate corresponding parts in all the figures.

A designates the cylinder, B the piston, and B the piston-rod, of the hammer, which is adapted to be secured to the side of a post or other support, the cylinder being provided with a bracket, A, for that purpose.

0 designates the valve, which is here represented as consisting of a double pistonvalve, though any other valve adapted to the situation might be used.

D designates the live-steam chest, which is supplied by an inlet, a, and D designates the exhaust-chest, provided with an exhaust-outlet, b.

From opposite ends of the cylinder extend passages c, which communicate, by means of ports d, with the live-steam chest D, and by means of other ports, 6, with the exhauststeam chest D.

It is obvious that if the valve be placed centrally and perform its full movement above and below the central position the steam will be admitted equally above and below the piston, and that if the valve be raised and still perform its full movement, steam will be admitted in greater quantity above the piston, and will be cut off from below the piston early in the upward stroke thereof, thus causing the piston to reciprocate in the lower portion of the cylinder. If, on the contrary, the valve be lowered, the steam will be admitted in greater quantity below the piston and be cut 05 from above the piston early in the downward stroke thereof, thus causing the piston to reciprocate in the upper portion of the cylinder.

Turning, now, to other parts, E designates a rook-shaft provided with an arm, f, which engages With and reciprocates the valve-stem g, and having fixed upon it an arm or lever, F, which is slotted for the greater portion of its length and engages with a pin or projection, G, upon the hammer-head G.

By the reciprocation of the piston the arm or lever F is moved back and forth, the rockshaft is oscillated and the valve reciprocated. Commonly the rock-shaft E is fitted in a stationary or rigid bearing; but I provide a bearing for it in a bracket, H, which is hinged or pivoted at h to a support, I, projecting from the cylinder A.

It is obvious that if the rock-shaft E be raised or lowered the valve will perform its movement higher up or lower down in the chest, with the results previously described.

To provide for conveniently moving the bracket H and raising and lowering the rockshaft, I employ an arm or lever, J, rigidly attached to the bracket, and of suilicient length to be grasped in the hand and afl'orded leverage to operate conveniently.

To hold the rock-shaft in any position to which it may be adjusted, I employ a clamping'bolt, 1', passing through the arm or lever J and engaging with an arc-shaped guide, K, rigidly connected with the bracket-support I, and in the present instance provided with an arc-shaped slot, j, through which the bolt passes.

\Vhen the bracket II is shifted and secured in any position by tightening the clampingbolt 2' the hammer will operate automatically; but when the said clamping-bolt is loosened the hammer may be operated intermittently by hand by shifting the arm or lever J.

By my invention I provide, in a very convenient manner, for causing the piston of a steam-hammer to reciprocate quickly and with the full power due to the pressure of the steam in either the lower or upper part of the cylinder, and thus afford facility for operating either upon thin or thick work.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination, in asteam-hammer, with a rcciprocatin g valve and a reciprocating piston-rod and hammer-head, of a rock-shaft for operating the valve, devices for oscillating said rock-shaft from the said piston-rod or hammer-head, and a hinged bracket comprisin g a bearing for said rock-shaft, substantially as and for the purpose specified.

2. The combination, in a steam-hammer, with a reciprocating valve and a reciprocating piston-rod and hammer-head, of a rock-shaft for operating said valve, devices for oscillating said rock-shaft from the said piston-rod or hammer-head, a hinged bracket comprising a bearing for said rock-shaft, a hand-lever for adjusting said bracket, and a device for clamping said bracket when so adjusted, substantially as and for the purpose specified.

3. The combination of the valve (1, the rockshat't E, provided with the armfand the slotted lever F, the projection and hammer-head G G, the hinged bracket H, the hand-lever J, and a device for clamping said hand-lever in position, all substantially as specified.

WILLIAM C. BARR. Witnesses FREDK. HAYNES, Tnos. E. BIRCH.

Images