US519843A - James t - Google Patents

Description

(No Model.)

' J. T; HAYDEN.

STEAM AGTUATED VALVE IOR- PUMPS. No. 519,843. Patented May 15,1894.

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JAMES T. HAYDEN, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE CRANE COMPANY, OF SAME PLACE. I

SPECIFICATION forming part of Letters Patent No. 519,843, dated May 15, 1894.

Application filed October 2.1893. Serial No. 486,997. (No model.)

To all w/tom it may concern-.-

Be it known that 1, JAMES T. HAYDEN, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Steam-Actuated Valves for Pumps, which are fully set forth in the following specification, reference being had to the accompanying drawings, in which- Figure 1 represents a vertical section of a pump embodying my invention, the pump cylinder proper and its piston being mainly broken away, taken on the line 1.1 of Fig. 3; Fig. 2, a front elevation of the valve chamber, partly broken away; Fig. 3, a detail vertical section, taken on the line 3. 3 of Fig. 2; Fig. 4., a plan section taken on the line 4. 4 of Fig.

' 1; Fig. 5, a front elevation of the valve detached; Fig. 6, a detail cross-section, taken on the line 6. 6 of Fig. 5; Fig. 7, a front elevation of the port-slide detached; and Fig. 8 a rear elevation of the same.

In the drawings, Figs. 1 to 4 inclusive are upon one and the same scale; and Figs. 5 to '8 inclusive are upon one and the same en- In the drawings I have shown the inven-- tion applied to an air-pump, such as is used on locomotives for supplying air to the main reservoir of an air-brake apparatus; but this is for illustration only and I do not in any Way limit my invention to this particular application. Only so much of the structure is shown as is necessary to an understanding of the present improvements, as the main parts of the pump are of any ordinary construction, and are not necessary to beshown and over the cap, upon which is seated a valve chest, D, being secured thereto by screw-bolts, as seen in Figs. 3 and 4. On this raised portion, I), there is also a second raised section. Z), lifted a little above the level of b, and forming the seat for the controlling valve, as will presently appear. Ports are provided in this raised section as follows: About the center thereof is sunk a large port, b on one side of which is a similar sunken port, 11 and on the other side a through port, I), extending entirely through the cap and opening into the upper end of the cylinder. The port, 5 is the exhaust port, and the exhaust pipe, E, connects directly with this port and extends thence outward radially to the edge of the cylinder and then is bent downward and carried on the side of the latter, as seen in Figs. 1 and 4t. Aconductor or delivery-pipe, E, connects immediately with the sunken port, b and extends thence outward radially and at an angle to the pipe, E, to the edge of the cylinder and then down the outside of the latter tothe bottom thereof, where it again enters the extreme lower end of the cylinder, as seen in Figs. 1 and 3. The valve-chest, D, is of circular shape, but at the back has an outward extension, (1, thus enlarging the chamber and extending it well back over the valve-seat, as seen in Fig. 3. A large aperture or port, (1, opens from the exterior into this rear portion of the chamber,

as seen in Fig. 3, and the main feed-pipe is 5 A recess, f, is cut out in the un- I00 der side of thisseat portion of the valve and abont'central thereof, as seen in Figs. 1 and 6, and at the front side of the valve there is a central port, f extending inward horizontally a slight distance and then turning down at right angles and opening into the said re cess, as seen in Figs. 5 and 6.

The body or seat portion of the valve is provided with cylindrical extensions, f at its respective ends, on each of which is mounted a small piston, F and F the formerbeing seen at the right hand and the latter atthe left hand ofthe valve in the section shown in Fig. 1, looking from what may be called the front of the structure. These pistons are fitted to the circular ends of the valve chest which form suitable cylinders therefor, as seen in Figs. 1 and 4, and the entire valve is somewhat shorter than the chest, so as to allow its reciprocation to a limited extent.

Aport,f leads into the body of the valve at the side thereof just at the right hand of the central exhaust port, as seen in Fig. 5, and then is bent at right angles outward and extends out entirely through the piston, F, as seen in Fig. 1. A like port, f, is let into the valve at the left of the exhaust port and then is bent at right angles and extends straight outward through the valve and its piston, F", as also seen in Fig. 1. All three ports are in a plane face on one side of the valve.

A port controller or supplementary valve, G, is mounted on the front face of the valve, F, and adapted to slide vertically thereon. This valve is a plain rectangular plate providedon its inner face with vertical grooves,

g, at its respective ends, which are adapted to receive similar splines or ribs, J, on the front of the valve, as seen in Figs. 4, 5 and 8, thereby providing guides for'this supplementary valve on which it is free to slide up and down. This supplementary valve is provided with a port, g, located near the lower right hand corner, as seen in Fig. 7, and in a vertical line With the port, f, in the main valve, when the slide is mounted. in place upon its guides. It is also provided with a similar port, 9 located in the upper left hand corner thereof, and arranged in the same ver-.

tical line with the left hand port, f when mounted in position. In the back of this supplementary valve there are also'provided two recesses, g and 9 the former commencing near the upper right hand corner of the plate and extending lengthwise of the same nearly to the port, 9 and the latter commencing near the lower left hand corner of the same and extending inward nearly to the right hand port, g, as seen in Figs. 7 and 8. Ifthe supplementary valve is slid up and down when mounted on its guides at the front of the main valve, it is obvious that the ports therein will be brought alternately into register with the respective side ports in the front of the main valve, and the recesses at the back of this slide will at the same time alternately register with the exhaust port in the main valve. This reciprocation of the supplementary valve is eifected by means already known and in use, consisting of a sliding carr1er, H, on the cylinder cap, its lower end passing down throughlthe' latter loosely, as seen in Fig. 3. This vertically sliding carrier is provided with lips, h, upon its inside which receive and embrace the supplementary slide, as seen in Figs. 2 and3, so that the latter Wlll be moved upand down by the vertical movement of the carrier, and also slide laterally therein as carried by the main valve. The lower end of the carrier inside the cyllnder is connected to-.the upper end of arod, L arranged within the cylinder and provided at this upper end with a button, 2. The rod passes down within the cylinder and 1S fitted loosely through a cap, a, 0n the piston, O, closing the upper end of the piston rod, a, which is hollow, as seen in Fig. 1. I of the rod, I, is provided with a head, t by which it is prevented from passing up through the cap, a, but at the same time the latter s free to slip upon the rod, as the piston is moved upward, the hollow piston rod, 0, accommodating this movement. But when the piston nearly reaches the end of its upward stroke, this cap strikes the buttonon the upper end of the rod, 1, thereby lifting 1t, and with it the carrier, which will, of course, ra se the sliding supplementary valve. Themaga in the downward movementof the piston near the end of its stroke, it strikes the head on the lower end of the rod, I, thereby pulling it port. Thus alternately connection is opened and closed between the steam chamber ofthe valve chest and the respective cylindrical ends thereof and with the exhaust passages for the respective ends of the steam cyl nder.

Referring to the drawings, in illustration of the operation of the device, Fig. 1 shows the piston at the end of its downward stroke, and the downward pull on the rod, effected as described above, has brought the supplementary slide into the position seen in Fig. 2 with the upper left hand port brought into register with the left hand port, of the valve. This admits steam at once to the cylindrical end of the valve chest at the left thereof and opens the exhaust to the cylinder at the opposite end, as seen in Fig. 4, and the valve will immediately be thrown over to the right The lower end it is connected;

I r 5 upper'recess, g will register with the exhaust r into the position seen in Fig. 1, carrying the supplementary valve with it. This movement of the valve opens the port, b thereby providing for passage of steam through the the port, f and raising the lower right hand port, 9, into register with the port, f when the valve willrat once be shifted again and a reverse operation will take place.

In the special details of construction there may be modifications without destroying the main features of the invention, so that I do not wish to be understood as limiting the invention to the precise details herein described and shown.

Having thus described my invention, what I believe to be new, and desire to secure by Letters Patent, is

1. In a steam pump, the cylinder provided with delivery and exhaust ports, in combination with a valve chest mounted thereon and having a cylinder chamber at each end, a sliding valve Within said chest adapted to control said ports and having a piston at each end, fitting the respective end cylinders of the chest, a port leading to the exhaust and two ports separate from the said exhaust port leading to and through the respective end pistons, a supplementary slide mounted on and movable with the valve over the said ports and provided with ports adapted to be inders at each end, in combination with a valve, F, provided with recess, f, in its under side, and a port f leading to the'exhaust and separate ports, f and f leading to the respective cylinders, and arranged at one side of the valve, pistons, F and F mounted on the respective ends of the valve and fitted to the end cylinders inthe chest, sliding supplementary valve, G, mounted on and carried with the valve to cover and slide over the ports therein and provided with ports, g-g adapted to register with the ports leading to the respective cylinders and back recesses, 9 -9 adapted to register with the exhaust port, and mechanism for reciprocating this supplementary valve by the movement of the main valve, substantially as described.

3. The cylinder, B, provided with cap, B, having exhaust port, b sunken port, b and through port, 17 all opening into the valvechamber, a delivery pipe, E, connecting the sunken port, 19 with the lower or opposite end of the cylinder, exhaust pipe, E, connecting directly with the exhaust port, 11*, valve chest, D, mounted on said cylinder head and provided with a cylinder at each end, valve, F, provided with recess, f, and ports, f f and f pistons, F and F fixed on the respective ends of the valve and fitted to the end cylinders of the valve chest, sliding supplementary valve, G, mounted on ways on the side of the main valve immediately over the ports therein and provided with ports, g-g and back recesses, g -g sliding carrier, H, connected to said supplementary valve, rod, I, connected to said carrier, and piston, 0, adapted to operate said rod at the end of its respective strokes, substantially as described.

JAMES T. HAYDEN.

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