US588533A

US588533A - Territory

Info

Publication number: US588533A
Authority: US
Publication date: 1897-08-17
Anticipated expiration: 1914-08-17

Description

(No Model.)

D. W. ROY.

REVERSING VALVE FOR ENGINES.

Patented Aug. 17, 1897.

INVENTOI? A TTOHNEYS.

WITNESSES m: W n15 PETERS c0, wuo'rcnl'ma, WASHINGTON, n. c.

UNITED STATES 1 ATENT Fries.

DAVID W. ROY, OF TUCSON, ARIZONA TERRITORY.

REVERSlNG-VALVE FOR ENGINE.

SPECIFICATION formingpart of Letters Patent No. 588,533, dated August .17, 1837.

Application filed April 16, 1897.

To all whom it may concern.-

' Be it known that I,'DAVID W. ROY, of Tuc-. son, in the county of Pima and Territory of Arizona, have invented a new and Improved Reversing-Valve for En gines,of which the following is a full, clear, and exact description.

The object of the invention is, to provide a new and improved reversing-valve for engines, which is simple and durable in construction, not liable to get out of order, and at all times under the easy control of the engineer.

The invention consists of certain parts and details and combinations of the same, as will be fully described hereinafter and then pointed out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 isasectional side elevation of the improvement on the line 1 1 of Fig. 3. Fig.

2 is asimilar view of the same on the line 2 2 of Fig. 3. Fig. 3 is a transverse section of they improvement on the line 3 3 of Fig. 1, and

Fig. 4c is a sectional side elevation of the im-- provement with the reversing-valve in a neutral or cut-off position. I

The engine on which the improvement is applied is provided with a cylinder A, in which reciprocates the piston B, connected in the usual manner with the main drivingshaft of the engine. Into the ends of the cylinder A open the cylinder-ports a and b, of which the port a. connects at its outer end with the two ports 0 and cl, arranged in the reversing-valve chest 0, containing the reversing-valve D in the form of a plug-valve, as illustrated in the drawings. The other cylinder-port b connects at- .its outer end with the two ports 6 and f, likewise arranged in the chest. 0, and leading to the bore 0, in which the valve D is mounted to turn. The ports cand e are arranged opposite each other on opposite sides of the valve D, and the ports d and f are similarly arranged relative to each other, but in a different vertical plane relative to the ports 0 and e. The ports a and e are adapted to connect with a port g, formed on the face of the plug-valve D, and this port 9 is adapted to connect with the port j, leading to the steam-chest F, containing the slider Serial No. 632,500. (No model.)

' valve G, operated from the main drivingshaft of the engine in the usual manner. The ports 61 and f are adapted to register with the ports h and/i, arranged opposite each other on the face of the plug-valve D, and the said ports h and z' are adapted to register with the port it, leading to the steam-chest F and controlled similarly to the port jby the slidevalve G. V e I Between the ports j and 75 is arranged an exhaust-port Z, leading to the outside and adapted to be connected by the slide-valve G alternately with the ports and it. On the outer end of the plug-valve, D is secured a handle E, under the control of the ope'rator, for turning the said plug-valve for, re.- versing the engine or for cutting off the steam from the cylinders, as hereinafter more fully described, the swinging movement of the said lever being limited by stop pins E, projecting from the chest O.

The operation is as follows: YVhen the severalparts are in the position as illustrated in Figs. 1, 2, and 3, the live steam from the steam-chest F can pass alternately through the portsj, g, o, and a and the ports 70, if, andb into'the right and left hand ends of the cylinder'A to move the piston forward and backwardtherein in the usual manner, it being understood that the slide-valve G controls the inlet of the steam to the said ports j k and the exhaust from the cylinders to the exhaust-port Z the same as in ordinary engines. When it is desired to reverse the engine, the operator swings the lever E over to the right, so as to move the plug-valve D into the position indicated in dotted lines in Figs. 1 and 2, whereby the steam from the steamchest F can pass through the uncovered port j, the ports g, e, and E) into the right-hand end of the cylinders to move the piston B to the left, and when the. port 70 is uncovered steam passes from the steam-chest through the said port It, the ports h, d, and a, into the left-hand end of the cylinder to move the piston B to the right. The exhaust takes place through the connected ports and the slidevalve G to the port Z, leading to the outside. When it is desired to cut off the steam from the engine, the operator moves the arm E into a vertical position, so that the plug-valve D closes the upper ends of the ports 0, d, e, and

f to prevent steam passing from the cylinder.

(See Fig. 4.)

Now it will be seen that by the arrangement described the reversing-valve chest is interposed between the ordinary cylinder A and the ordinary steam-chest F, and said reversing-valve chest contains the reversingvalve D and several port-s, as above described.

Thus the device may be readily applied to any ordinary engine by interposing the reversing-valve chest between the cylinder and the steam-chest F.

For new engines the reversing-valve chest 0 may be made integral with the cylinder A or the steam-chest F.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. A reversing-gear for engines, comprising a slide-valve operating over two inlet-ports and an exhaust-port, and a plug-valve having three ports one of said ports being formed on the face of said valve and adapted to connect one of the said inlet-ports with either of the cylinder-ports, the other two ports being arranged opposite each other on the face of the valve and adapted to connect the other inletport with either of the cylinder-ports, substantially as described.

2. A reversing-gear for engines, comprising a reversing-valve chest provided with a set of ports arranged opposite each other and connected with the respective cylinder-ports, the said valve-chest being provided with a second set of ports also connected with the cylinder-ports and arranged opposite each other but in a different Vertical plane relative to the first set of ports, the valve-chest being further provided with two inlet-ports connected with the steam-chest, a plug-valve adapted to be turned in the said valve-chest and formed with a port on its face adapted to connect one of said inlet-ports with either of the first set of ports in the reversing-valve chest, the said plug-valve being also formed with two ports arranged opposite each other on the face of the valve and adapted to connect the other inlet-port with either of the second set of ports in the valve-chest, whereby the steam can pass from either of said inlet-ports to either end of the cylinder, substantially as shown and described.

3. A reversing-gear for engines, comprising a reversing-valve chest provided with a set of ports arranged opposite each other and connected with the respective cylinder-ports, the said valve-chest being provided with a second set of ports, also connected with the cylinder-ports and arranged opposite each other but in a different vertical plane relative to the first set of ports, the reversing-valve chest being further provided with two inlet-ports connected with the steam-chest, a plug-valve adapted to be turned in the said valve-chest and formed with a port on its face adapted to connect one of said inlet-ports with either of the first set of ports in the reversing-valve chest, the said plug-valve being also formed with two ports arranged opposite each other on the face of the valve and adapted to connect the other inlet-port with either of the second set of ports in the reversing-valve chest, whereby the steam can pass from either of said inlet-ports to either end of the cylinder, and a slide-valveover the said inlet-ports and over the exhaust-port to allow the steam to pass from the cylinder to the outside, substantially as shown and described.

4. A reversing-gear for engines, comprising a reversing-valve chest provided with tn 0 sets of ports connected with the cylinder-ports and two inletports connected with the steamchest, a plug-valve mounted to be turned in the said valve-chest and having three ports, one of said ports being formed on the face of said valve and adapt ed to connect one of the said inlet-ports with either of the cylinderports and the other two valves being arranged opposite each other on the face of the valve and adapted to connect the other inlet-portwith either of the cylinder-ports, means for turning the said plug, and means for limiting the turning movement of the plug, substantially as shown and described.

DAVID W. ROY. Witnesses:

RAY JOHN. WELCOME, JOHN G. Rov.