US5051A - Valve of steam-engines - Google Patents

Description

UNITED sTATEs PATENT oEEIoE. i

J. D. BEERS, OF PHILADELPHIA, PENNSYLVANIA.

VALVE Oll STEAM-ENGINES.

Speccation of Letters Patent No. 5,051, dated April 3, 184:7.

To all whom t may concern:

Be it known that I, JOHN D. BEERS, of the city of Philadelphia, in the State of Pennsylvania., have invented a new and improved manner of constructing and arranging slide-valves and steamways of locomotive and other steam engines, by which arrangement they are rendered more etlicient and the motion of the engine is more readily reversed than under the modes of construction heretofore adopted; and I do hereby declare-that the following is a full and exact description thereof.

In the accompanying drawings, Figure l, is a perspective view of three valve seats with the steam-tubes by which they are connected together. Figs. 2, and 3, are the steam chests of the two outer valve seats,

and Fig. 4, that of the inner, or middle, seat.

Within each of these the slides of said valves are also shown. S

As represented in Fig.- 1, the apparatus is adapted to a combination with the two cylinders of a locomotive, or other, engine; but it is not necessary to show these cylinders, the valve seats, A, and B, being connected with them in the ordinary mannen The steam chests, A, and B, are to be secured by screw bolts on their respective seats, as usual, and the steam chest C', on the middle seat, C.

Fig. 5, is a sectional view of the outer valves, A, and B, in a vertical plane through their middles, and Figs. 6, and 7 a like sectional view of the valve, C. It will be seen that in the valve seats, A, and B, there are iive openings in one range, all equal in size; there is, also, a sixth, a, which is small, and which communicates with the small tubes, b, 40 b, which are for the purpose of supplying steam to the steam chests, so as to press upon the slides, D, D, contained in those chests; the projecting cavities, c, c, on the steam chests, embrace these openings, and thereby admit steam to press constantly on the slides. The slides, D, D, embrace, and eX- tend beyond, the five openings first named,

but are unconnected with the small ones, a.,

a, there never being any communication between the steam contained in the steam chest above the slides, and that supplied to the cavities, or steam passages, below the slide.

T he slides of these valves are furnished with three steam cavities, these being necessary to their action, under my arrangement.

The steam seat, C, has three principal and B; the slide, E, has two projections, Y e, e, upon 1t, which close the openings, d, d,

when situated directly over them. The

valve C, receives the steam from the boiler through the top of the steam chest, as shown at C, Figs. 6, and 7. E, E, are the tubes that convey1 the steam into the valves, A,

and B, from which it passes into the cylinder; ,and F, F, those that convey the exhaust steam from the valves A, and B, into C.

whence it passes through the escape pipe l Figs. 1, 6, and 7. Immediately before the steam passes into the tubes, E, E, it passes throughthe tubes, t, b, 4and thence into the steam chests of A', and- B, and presses on the slides D, D, in said chests, which it holds firmly on their seats. v The valves A, and B, are precisely alike, and the sectional view of that marked A, in Fig. 5, will, therefore, serve to explain "the operation of both. The cavities in the slide D, are marked f, g, and z.; those in the seat, I'I, I, J K, and L. The cavities L, and H, com-k municate with the tube E. The steam way J, communicates with the pipe F; and the dotted lines at z', and j, represent steam ways communicating with the cylinder.

Figs. 6, and 7, are sections of the valve C,

Fig. 1, showing the slide E, in different pon sitions; c, is the cavity in said slide.

M, is a steam way communicating with the pipe E, and N, a steam way communicating with the pipe F.

In the operation of the engine, steam is allowed to pass into the steam chest, C, C',

Fig. 6, and the slide E', being so situated as to allow it toenter the steam way M and the tube E, it is conveyed to the outer valves, and enters them as at E, Fig. 5, and is conveyed through L, and K, to the opening j, communicating with the'cylinder. The escape steam is at the same time passing out from the opposite end of the cylinder into the valve seat at z', and through I, andJ, into the tube F, and thence alongy said tube to the middle valve C, Fig. 6, which it enters at F, and passes through the way N, to the escape pipe G, G.

The slide D, D, Fig. 5, when steam is to pass into the opposite ends of the cylinders the steam tube. For this purpose the rod, or`

stem, 0, is furnished with a lever by which the position of the valve can be changed, and made to assume that shown in Fig. 7 Vhen in this situation, the steam will pass from the chest C', through the passage N, and intothe tube F; from said tube it will enter the valve A, Fig. 5, at F, and passing through J, and I, will enter the cylinder through the opening indicated by i. 'Ihe escape steam will at the same time pass from the cylinder through the opening i,-and through K, which it will enter the middle valve at E, Fig. 7 and passing up M, .will be conducted to the escape pipe Gr, G. It will be seen that under this arrangement, the motion lof the engine may be instantaneously reversed and that with unerring certainty.

I have represented the three valves, A, B and C, Fig. 1 as in a right line, but the place of the middle valve may be variedin numerous ways; my improvement, however, is independent of any particular positionof and L, into the tube E, from this part which may be arranged according to the fancy, or the judgment of the builder of the engine.

Having thus fully described the nature of my improvement inlthe manner of con- Y struct-ing and arranging the slide valves and steam ways of locomotive and other steam engines, what I claim therein as new, and desire to secure by Letters Patent is- The manner of arranging their respective steam ways and the cavities in their slides, as herein set forth, and represented in the accompanying drawings; that is to say, I claim the employment of the ve openings, or steam cavities, in the valves A and B, in combination with the three cavities in the slides D, and with the tubes E and F, connecting the valves A and B with the valve C under an arrangement of the respective steam passages -as represented, and for the purpose set forth; by which the respective parts thereof are made to operate, and the action of theA engine; may be reversed substantially as described and this I claim whether the arrangement made, be precisely the same with those of which exempliflcations are herein given, or be varied therefrom, while the same end is attained by means substantially the same. A

v JOHN D. BEERS.

Witnesses:

Trios. P. JONES, LEML. WILLIAMS.

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