US495213A - Valve - Google Patents

Description

(No Model.) 4 Sheets-Sheet 1. W. G. ADAMS 8; J. S. FORBES.

VALVE.

Patented Apr. 11, 1893.

INVENTORS,

4 Sheets-Sheet 2.

(No Model.)

W. G. ADAMS 8v J. S. FORBES. VALVE. No. 495,213. Patented Apr. 11 1893.

(No Model.) 4 Sheets-Sheet 3.

W. GQADAMS & J. s. FORBES.

VALVE.

No. 495,213. v PatentedApr. 11, 1893.

(No Model.) '4 Sheets-Sheet 4.

w. G. ADAMS & J. s. FORBES. VALYE.

No. 495,213. Patented Apr. 11, 1893.

INVENTORH,

UNIT D STATES PATENT OFFICE.

WVILLIAM G. ADAMS AND JOHN SIMS FORBES, OF PHILADELPHIA,

PENNSYLVANIA.

VALVE.

SPECIFICATION forming part of Letters Patent No. 495,213, dated April 11, 1893.

Application filed May 27, 1892.

valve as is therein described, without departure from the general principle of its operation.

In the accompanying drawings, Figure 1 represents a vertical central section through a valve embodying our improvements, the Valve being in a position intermediate between a closed and an entirely open one. Fig. 2 is a similar sectional view, the valve being entirely open. Fig. 3 is a central vertical section on a plane at right angles to that of Fig.

1. Fig. 4: is a partial vertical section showing a modified arrangement of the actuating devices, and Fig. 5 is a top or plan view of such modified form.

The fundamental feature of invention, which characterizes this valve and that of our previous application referred to, lies in the fact that the movements of the valve proper are derived from the oscillation or rocking of the diaphragm portion of a continuous closed casing, whereby We not only avoid the danger of leakage and other inconveniences attendant upon the use of stuffing boxes and similar devices, but also overcome the difficulties whichare incident to the employment of diaphragm valves, or those where the movement of the valve is effected by forcing a diaphragm in a direction perpendicular to its normal plane.

In our present improvement the rocking member is modified in form, in such manner that the valve as a whole is simpler and more compact and its construction is greatly cheapened.

Serial No. 434,588. (No model.)

The type of our device shown in Figs. 1, 2, and 3 of the drawings will now be described.

A represents the valve body, having an inlet orifice, a, and outlet, 19, which latter is provided on the inside with a valve seat, G. The body terminates at its upper end in an enlarged annular head, B, whose inner periphshoulder, D the vertical portion of the 'periphery above said shoulder being threaded, as shown, to receive an annular nut, O.

The valve, E, is pivoted at e to the horizon: tally projecting lower end of a vertical lever arm, F; the position of the valve with reference to the seat, G, being such that the swinging or rocking motion of the said lever F, shall throw the valve into close contact with, or force it away from said seat. Said lever arm, F, is suspended from the rocking member, which in this our improved form consists of a plate, H, preferably of thin metal, and of such size as to fit snugly upon the shoulder D and be clamped in position by means of the annular nut O. The lever, F, is provided with a shoulder, I, and upwardly projecting cylindrical stem, J, which latter passes through a hole formed in the plate, H, and terminates Washers, h, h, of

in a threaded portion j. graded diameters, as shown, are interposed between the shoulder, I, and the plate 11, and similarly graded washers, 71. If, are arranged above the plate and between it and the cappiece, K, which is'clamped down upon said washers so as to form a tight joint, by means of the nut, L, engaging with the threaded portion, j, of the stern, J. This cap-piece is substantially circular in outline and is provided with a downwardly depending flange, M,

which overhangs and surrounds the top of the valve body. It is pivotallyconnected with said body by means of screws, on, m, (see Fig. 3) having their axes in a line which coincides with the plane of the plate H. Said axis is indicated at N, N, in Figs. 2 and 3, and it is, as will be seen hereinafter, the fulcrum upon which the lever, F, oscillates. At one side of the cap-piece, preferably that which overhangs the outlet, b, its periphery my is provided with a horizontal offset or is extended into an upwardly and outwardly projecting horn, Q. Beneath said horn, a rigid bracket, S, projects out from the top of the valve body and carries a pivoted latch, 0, which projects upwardly through an opening in the horn and is provided with a shoulder, 0, adapted to engage above the horn when the latter is depressed. A spring, P, is mounted in the lower end of the latch and bears upward against the under side of the horn, Q, normally tending to throw it to the left in Figs. 1 and 2.

In the position shown in Fig. 1, the parts are in what may be termed a neutral position.

That is to say, the plate His in its normal plane throughout; the lever, F, is perpendicular, and the valve, E, is half open. To completely open the valve, the horn Q is depressed, as is shown in Fig. 2. This movement causes the cap-piece, K, to turn upon its pivots, m, m, and to rock the plate and with it the lever F. The axis upon which the rocking movement takes place is, as above stated,the line N, N, and upon one side of this line the plate, H,is raised or bent upward,while upon the other side it is depressed or bent downward to a corresponding degree, as shown in Fig. 2. A very slight rocking of the plate will suffice for the purpose, since the movement is multiplied by reason of the length of the lever arm, F. The downward movement of the horn suffices to throw the edge of its opening below the shoulder, 0, upon the latch, O, which then springs over and engages, as shown in Fig. 2, so as to hold the valve permanently open.

When it is desired to close the valve, the latch, O, is depressed so as to throw its shoulder clear of the horn, whereuponthe spring, P, forces the horn upward and throws the cap-piece over in the opposite direction, rocking the plate past its normal plane into a position the converse of that shown in Fig. 2, so that the lever arm, F, and the valve, E, are thrown toward the seat, G, to close the valve. In this extreme position the plate, II, will be depressed upon one side of the axial line, N, N, and raised upon the other side thereof, in a manner similar to that above described, but of course in the opposite direction. By thus making the normal plane of the plate, H,intermediate between the two extreme positions of the lever, we obtain the necessary range of movement with a minimum of departure in each direction from the normal position of the plate.

In comparing the action of the diaphragm portion of our continuous closed casing with the action of the diaphragm in the ordinary diaphragm valves, it will be seen that the diaphragm distortions, so to speak, in our structure, which occur each side of the axis, are by the rocking movement of the diaphragm on its axis rolled away from each other, so that unnecessary compression is avoided, while in the ordinary diaphragmatic valves, which are operated by a movement perpendicular to their normal planes, there is no rolling action, but on the contrary the distortions each side of the center resist each other and produce actual compression of the plate.

In the forms of our invention indicated in Figs. land 5, the essential principle is precisely similar to that already described, and consequently the valve and lower portions of the apparatus are not shown, the corresponding parts to those indicated in Fig. 1, being noted in Figs. 4 and 5 by similar letters with the prime mark. Thus the casing in Figs. 4 and 5 is indicated by A, the lever by F, the plate by H, &c. The actuating devices alone are modified.

In the form shown in Fig. 4, the cap-piece, K, (pivoted at m m to the body A is provided at one side with a depending boss, T, in which is rotatably supported a cylinder U. Said cylinder has a cam incline, 71., upon its periphery which engages with a lug, 25, projecting from one side of the upper portion of the body. A handle, U, is connected with the cam cylinder, U, whereby it may be turned in one direction or the other, and a spring, R, engages between the top of the cylinder and the under side of the boss T. By

.the rotation of the handle, U, in one direction or the other, the cam-incline upon the cylinder, U, will raise or lower the side of the cap-piece and produce the rocking movement of the plate, H, by which the lever, F, is shifted.

Having thus described our invention, we wish it to be understood that the alternative form of actuating device is only given as indicating one of many types which it may be convenient to use in connection with our improved valve, but such forms have of course no essential relation to the invention, and hence we do not limit ourselves to the use of these, or any particular details of the actuating device. Furthermore, although we have described the rocking plate, H, as a flat disk, provided with washers on either side, (since that is the form which we prefer) we donot limit ourselves to such form or arrangement. Thus, if a corrugated plate were used, the rocking movement would still take placeabout an axis diametric of the plate, or substantially coincident with what may be termed a line, its general plane considered as a whole. Obviously, therefore it is only essential that the plate should be capable of a true rocking movement about such an axis and have a range of movement sufficient to afford the necessary amount of oscillation for the valvecarrying lever.

We claim- A valve embodying in its organization a valve body provided with a suitable valve seat avalve arranged adjacent to the valve seat;a

plate forming a continuous closed portion of the valve body said plate being rigidly connected around its periphery with the valve body and arranged to rock upon an'axis 0oincident substantially with a line in the general plane; a. lever connected with the valve and the aforesaid plate, and means for actuating the plate, whereby the valve may be opened and closed, substantially as hereinbefore set forth.

W. G. ADAMS. JNO. SIMS FORBES.

Witnesses:

J AMES H. BELL, G. HERBERT JENKINS.

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