US519706A

US519706A - Steam-actuated valve

Info

Publication number: US519706A
Authority: US
Publication date: 1894-05-15
Anticipated expiration: 1911-05-15

Description

(No Model.) 7

J. B.,.GORRELL.

STEAM AGTUATED VALVE.

N 519,706. Patented May 15,1

ATTORNEY.

Na cuMPANv.

To a. whom it may concern.-

UNITED STATES PATENT OFFICE.

JOHN B. GORBELL, OF LA OTTO, INDIANA.

STEAM-ACTUATED VALVE.

SPECIFICATION forming part of Letters Patent No. 519,706, dated May 15, 1894.

Application filed January 12, 1894. Serial ITO-496,617. (No model.)

Be itknown that 1, JOHN B. GORRELL, a citizen of the United States, residing at La Otto, in the county of Noble and State of Indiana, have invented certain new and useful Improvements in Steam-Actuated Valves;

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, which form part of this specification.

My invention relates generally to steam actuated valves and especially to theimprovements in double acting, independent steam pumps, in which the steam and water pistons are connected directly by means of the piston rod.

The object of myinvention is to so improve this class of pumps that they may have no dead center, and produce a steady and evenly reciprocating movement of the pistons. I attain these objects by the mechanism herein described and illustrated in the accompanying drawings, in Which- Figure 1 is a vertical section of the mechanism showing the position of the moving parts when the slide valve has been moved far enough to cover half of the ports j y". Fig. 2 is a top view of the mechanism with the lid of the steam chest removed, exposing to View the slide valve.

Similar letters refer to similar parts in both figures.

A is the steam cylinder; B the floating valve cylinder; 0 the floating valve. This floating valve is usually cast solid out of brass and has twopistons f and f, one set at each end, and arranged with respect to the ports, as shown in the drawings.

D is the steam chest and E the slide valve. This slide valve is usually slotted as shown in both figures, to allow the portion of the actuating rod H, between the lock nuts b, b,

, to pass freely through it.

F is the steam piston.

G is the piston rod; H the slide valve or actuating rod; I the bar or link connecting the slide valve rod to the upper end of the lever J 5 K the fulcrum standard; L the piston rod collar or block adjusted to the piston rod bya set screw and having on its side a pin which engages the fork on the lower end of lever J.

P, P are floating valve cylinder heads.

Q, Q are cast connections between the steam and water cylinders, when used in connection with a water cylinder.

b, b are look nuts screwed upon'the slide valve rod to limit the longitudinal movement of the slide valve.

0 is the steam cylinder head; at the steam y, y are ports near the ends of the floating valve cylinder and connecting the same with the steam cylinder A, and being arranged as shown.

Any approved manner of connecting the ports will answer the purpose. The manner of arranging theseports and the floating valve pistons will be more fully explained hereinafter when showing the manner of operating the pump, which is as follows: Steam is admitted through the pipe d, when, supposing the parts to be in the position shown in the drawings, the slide valve is on a center covering only half the openings made by ports j,j', as shown in Figs. 1 and 2. The slide valve being in the position shown, allows steam to fill both ports j, j, but subjecting only the inner end of the floating valve cylinder (B) to the full steam pressure. Steam passes through port j, through the inner end of the floating valve cylinder B, through port y into the steam cylinder and acts on the steam piston F and drives it to the outer end of its cylinder the exhaust steam passing through an into the shifting exhaust chamber between the pistons f, f through the outlet upon the inner end of the floating valve cyl inder until the piston F is caused to move toward the outer end of its cylinder, and the slide valve, by means of the connecting mechanism, is caused to move in the opposite direction until port j is closed and steam is shut 0E. The slide valve, by the expansion of the steam in the cylinder A, continues to move toward the inner end of the steam chest until the hollow space in the under side of the valve is connected with the port j. The pressure is then relieved from the inner end of the floating valve, and the pressure at the outer end causes the valve to move toward the inner end of the cylinder 13; the steam in the extreme ends acting asacushion preventing the pounding of the heads P, P. The exhaust steam passes out through the port j, through the space underneath the slide valve, through this opening it, which may be of any convenient size, into the shifting exhaust chamber and thence into the air through outlet pipe '6. When the floating valve has been driven to the inner end of the cylinder, port m is connected with the shifting exhaust chamber, and a passage is opened to allow steam to exhaust from the inner end of the main cylinder on the backward movement of the piston F. Steam is also allowed to pass through ports j, and y, and piston F is forced back again. During the backward movement of the piston F, the slide valve remains in the same position, covering port j, being held firmly in place by the pressure of the steam in the chest, until piston F moves far enough to cause the slide valve, by means of the mechanism connecting the main piston rod with the slide valve rod, to move toward the outer end of the steam chest, thus covering portj and connecting it with the exhaust chamber by means of the hollow space on the under side of the slide valve. Thus the floating valve is made to admit, cut-off and release steam alternately as the piston F is forced from one end to the other of the cylinder A.

In the practical construction of the steam valve thus described, I usually make a single casting of the steam cylinder A, water cylinder, when one is used, connecting bars Q, Q, thus giving a solid framework for the pump. The steam cylinder head 0 and the heads P, P, of the floating valve cylinder, are screwed into their respective cylinders. The steam chest D, and its lid D, floating valve cylinder B, are likewise separate castings, the several parts being held in position by bolts.

Having thus described my invention, what I claim to be new and useful, and desire to secure by Letters Patent, is as follows:

1. In a steam actuated valve the combination with the steam cylinder A, of the piston F, the floating valve 0, provided with two pistons, one at each end, the floating valve cylinder B, ports j, j, m, m, h, 3 3 exhaust pipe i, the steam chest D, slide valve E, nuts I), 1), rod H, connecting bar I, valve lever J, standard K, piston rod collar L, piston rod G, substantially as described.

2. In a steam actuated valve the combination and arrangement of the opening h. and the portsj, j, with the chest D, slide valve E, actuating rod I-I, nuts 12, b, with the floating valve cylinder B, its floating valve O,having pistonsfif', of the steam cylinder A, its piston F, steam ports y, y, exhaust ports m, m, with the mechanism for operating the slide valve rod by the main piston rod, the whole being substantially as specified.

3. The arrangement and combination of the openings or ports d, h',j,j', m, m, 2', y, y, with the steam chest D, the slide valve E, the floating valve cylinder B, its floating valve O, steam cylinder A, main piston F, together with the mechanism for operating the slide valve E by the main piston F, the whole being substantially as specified.

Signed at Avilla, county of Noble, State of Indiana, this 14th day of November, 1893.

JOHN B. GORRELL.

\Vitnesses:

C. H. WERDAR, JEAN MCLACHLAN.