US1321765A - lynne - Google Patents

Description

I. A. LYNNE.

REVERSE VALVE` FOR STEAM ENGINES.

APPLICATION FILED JuLY2o.1911.

1,321,765. PatentedN0v.1l, 1919.

APPLLCATIQN FILED JUN/2011917.

11116112911 Nov. 11, 1919.

2 SHEETS-SHEET 2.

IVER A. LYNNE, OF HIBBING, MINNE.SO'JMLv REVERSE-VALVE FOR ST'E'AMPENGINES.'

Specicaton of Letters Patent.

BatentedNov.` 11., 1919.

Application led July20,y 1917. Serial No. 181,846.

To all 'whom 1f/may concern.'

Be it known that I, IVER A. LYNNE, a,

citizen orP the United States, residing at Hibbing, in the county of St. Louis and State of Minnesota, have invented certain new and useful Improvements inReverse- Valves for Steam-Engines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled inthe art to which it ,appertains to make and use the same- This invention relates toa new and useful reverse valve for usein connection with the steam pressure cylinder of a locomotive and the primary object of the inventionis to provide a valve of this character which will eliminate the usual expensive and com plicated link motion valve gear mechanism. Another obj ect of the invention is to provide a simple, durable and ellicient reversev valve adapted to be manually operated to position it for either outside or inside admission vto control the admission of fluid pressure to either side of the steam cylinder piston to reverse its normal direction of travel without changing the normal direction of travel of the piston valve in the steam chest of the pressure cylinder.

With these and other objects in view as will appear as the description proceeds, the invention comprises the various novel features of construction, combination and arrangement of parts as will be more fully described hereinafter and afterward speciiically claimed.

Referring to the drawings,

Figure 1 represents a side elevation of the reverse valve.

Fig. 2 represents a horizontal sectional view taken on the plane indicated by the line 2 2 on Fig. l.

Fig. 3 represents an end view of the valve structure.

Fig. 4 represents a vertical sectional view taken on the plane indicated by the line 4-4 on Fig. 3, and showing a diagrammatic proj ection of the steam engine cylinder to illustrate the relative relation of it to the reverse valve.

Fig. 5 represents a. transverse sectional view taken on the plane indicated by the line 5--5 on Figft, showingthe valve inneutral position.,

Fig. 6 is a similar view showing thevalvein positionfor outside admission.l

Fig. 7 is asimilar viewfshowing the valvevr inrposition for inside admission, and:

Figy 8y is a vertical sectional elevation taken onf the plane indicated by the line 8 8 on Fig. 5.

Fig. 9 is a transverse section through the valve andcasing showing the intermediate ports with the valve in neutral position.

Similar characters of reference are used to. denote corresponding parts throughout the accompanyingdrawings and the following description.

In order that the construction and operation of the inventionmay` be readily comprehended, Il have illustratedan approved embodiment thereof` in the accompanying drawings and will now proceed to fully describe the same, in connection with said drawings, in whichl indicates asteam pressure cylinder whichfis of the usual and well known construction, and 2 the drive piston which` is `slidably mounted therein.

A steam chest 3 is arranged at one side of the steam cylinder and is provided with a bore 4 in which is slidably mounted a piston valve 5 carried by one end of a valve rod G extending through the end 7 of the steam chest, said end beingV provided with a sui*- able stuffing box 8. This pistonvalve consists of: a pair of spaced heads 9, each` of which is provided circumferentially with a. packing ring 10. Distributing ports 11 and 12 extend transversely through the connecting wall of thefsteamcylinder and the steam chest and establish communication between the steam cylinder and the steam chest.

A valve casing 13 is disposedimmediately below and in vertical alinement with the steam chest and Vis provided with a longitudinally disposed bore 14 in which is rotatably mounted a` plug valve 15. This valve 15 is pro-vided with three- way passages 16, 17, and 18 which extend transversely through it. Each of these threeway passages consists of a transverse passage intersecting the axis of the valve 15 and an outwardly flared branch passage disposed at an angle to the passage intersecting the valve axis whereby communication between the steam chest and the inlet and exhaust ports may be'maintained at all times irrespective of'whether the .valve is positioned for outside or inside admission. It is to be further noted-1 that thethree-,wayL passages on opposite ends of the block valves are arranged in longitudinal alinement while the intermediate three-way passage is relatively olf-set so that the valve may be positioned for' either outside or inside admission. The front wall of the valve casing is provided with inlet Y ports 19, 20, and 21, while the wall connecting the valve casing with the steam chest is provided with fluid passages 22, 23,.and 24 which establish communication between the plug -valve and the steam chest. The `valve casing is also provided in its rear side with exhaust ports 25, r26, and 27 which lead to a common exhaust port 28, and the inlet ports 19, 20 and 21 are fed from a common supply 21a'. rlhe ports and passages are correlated. Thus, the passages 22, 23 and 24'are in a longitudinal line, and the flared branches of the three-way passages of the valve 15 are always in communication with the respective passages 22, 23 and 24. The ports 19, 20 and 21 are at one side of the casing 13 andthe ports 25, 26 and 27 are at the opposite side, with the passages 22, 23 and 24 between said opposite sides. vrThe relation of the passage 16 with the ports 19 and 25 is the same as the relation of the passage 18 with the ports 21 and 27, while the relation of the passage 17 with the ports 20 and 26 is reversed. Thus, when the valve 15 is in neutral position, as seen in Figs'. 5 and 9, the ends of the passage 18 are at those sides of the ports21 and 27 opposite to the passage 24, and likewise, the ends of the passage 16 are at those sides of the ports 19and 25 opposite to the passage 22, while the ends of the passage 17 are at those sides of the ports 20 and 26 nearest the passage 24, as seen iii-Fig. 9. Therefore, when the valve 15 is turned in one direction, the passages 16 and 18 will be brought into registration with the respective ports 19 and 21 at one side of the casing 13, while the intermediate passage 17 will be brought into registration with the port 26 at the opposite side of the valve casing, thus providing for the flow of steam inwardly through the passages 16 and 18 and out through the passage 17. When the valve 15. is turned in the opposite direction, the passages 16 and 18'will'be brought into registration with the respective ports 25 and 27 at the side opposite to the ports 19 and 21, while the passage 17 is brought into registration with'the port 20 for the inward flow of steam through the passage 17, and the outward flow through the passages 16 and 18. The ports 19, 20 and 21 are in a longitudinalfline at one side of the passages 22, 23 and 24 and the ports 25 and 27 are in a longitudinal line at the opposite side and equal distance from the passages 22, 23 and 24, vwhile the port 26 is farther away from said passages than the ports 25 and 27. For this reason, the'diametrieal portion of the passage 17 isarranged at an acute anglel with respect to the diametrieal portions of the passages 16 and 18 with respect to the axis of the valve 15.

The plug valve is provided at opposite ends and at points intermediate the threeway passages with packing rings 29hwhieh serve to prevent the fluid from working its way from one passage to another around the circumference of the valve. In order that the valve may be rotated, a. stem 30 1s attached to one end and extends through a suitable stuiiing box 31 in the end of the valve casing 32, the outer end of the stem being provided with a suitable handle The casing end 32 is provided with a pair of spaced laterally projecting lugs 34 between which operates an ear 35 carriedby the handle 33, said ear serving to limit the rotation of the valve in either direction when said three-way passages have been moved 85 into registration with the respective inlet and outlet ports.

ln practice, the piston 2 is connected to the locomotive drive wheels by the usual pitman, while the piston valve 10 is connected to the usual eccentric and operates in the usual and well known manner.

In the operation of the device and when it is desired to drive the locomotive forward, the valve 15 is positioned for outside admission by rotating it until the threeway passages 16 and 18 register with the inlet ports 19 and 22, and 21 and 24 respectively. At the same time the passages 16 and 18 establish communication between the inlet ports and the steam chest, the, three way passage 17 establishes communication between the ports 23 and 26 to provide an exhaust for the steam chest.

When the valve has been thus set, steam or other fluid pressure will pass in the ports 19 and 21, through passages 16 and 18, ports 22 and 24, and into the steam chest 3 and counter-balance the piston valve. The steam will then pass through the distributing port 110 11 and into the steam cylinder 1 for action against the piston 2. As the piston 2 is moved lengthwise ofthe cylinder, the air or fluid pressure which may be on the opposite side of it will exhaust through the port 12, 115 through the steam chest between the piston valve heads 10 to port 23, through the threeway passage 17 and out through port 26. When the eccentric shifts the piston valve 5, the steam will pass from the steam chest 120 3 through the distributing port 12 into the steam cylinder while the exhaust from the steam cylinder on the opposite side of the piston 2 will pass through the distributing port 11, piston valve 5, port 23, three-way 12a passage 17 and out through port 26.

VWhen it is desired to reverse the normal direction of travel of the piston 2 to reverse the direction of travel of the locomotive or other engine, the valve 15 is positioned for 130 inside admission by rotating it until the three-way passage 17 establishes communication between the ports 20 and 23, and the passages 16 and 18 establish communication between the ports 22 and 25, and 2-/l and 27 respectively thus changing the inlet passages to exhaust passages and the exhaust passage to an inlet passage.

With the valve 15 reversed as just described, steam or fluid pressure will enter the port 2O and pass through the passage 17 of the valve, port 23, piston valve 5, port 12 and into the steam cylinder, whereby its expansive force will act to drive the piston 2 in the opposite direction, thus reversing its normal direction of travel. The fluid pressure that is exhausted fro-m the steam cylinder in this instance will exhaust alternately through the ports 11 and 12, 22 and 2li, and 25 and 27.

rIhe admission of fluid pressure to the steam chest may be controlled by the valve handle 33 and when the latter is arranged in a neutral position between the stop lug 234-, fluid pressure will be prevented from entering the steam chest, as clearly shown in Fig. 3.

I claim:

1. The combination of a fluid pressure cylinder', a piston working therein, a fluid pressure chest having port-s communicating with the opposite ends of said cylinder, a valve casing having ports near its ends communicating with the end portions of said chest and an intermediate port communicating with said chest between the first named ports, a piston valve in said chest for alternately establishing communication between the first named ports and the second and third named ports, said valve casing having inlet and exhaust ports, and a cylindrical valve rotatable in said casing and having a plurality of three-way passages extending transversely therethrough and arranged to lalternately establish communication between the last named ports and'second and third named ports.

2. The combination of a fluid pressure cylinder, a piston working therein, a fluid pressure chest having a pair of ports communicating with the opposite ends of the cylinder, a valve casing having an intermediate port communicating with said chest intermediate with its ends, and also having end ports near the ends thereof communicating with the end portions of the chest, a piston valve in the chest for alternately establishing communication between said intermediate port and first named ports, and connecting the end ports with the first named ports alternately with respect to the intermediate port, said casing being provided at three longitudinally spaced positions corresponding to the end and intermediate ports with an inlet and an exhaust port for each of said end and intermediate ports, and a cylindrical valve rotatable within the valve casing and having longitudinal spaced three-way passages extending transversely therethrough for alternately establishing communication between the intermediate port and its inlet and exhaust port, and between the end ports and their inlet and exhaust ports alternately with respect to the intermediate port.

3. The combination of a fluid pressure cylinder, a piston working therein, a liuid pressure chest having a pair of ports communicating with the opposite ends of the cylinder, a valve casing having an intermediate port communicating with the intermediate portion of the chest, and having end ports near the ends thereof communicating with the opposite end portions of the chest, a piston valve working within the chest for alternately establishing communication between the intermediate port and first named ports, and between the end ports and first named ports alternately with respect to the intermediate port, said casing being provided at one side of the intermediate and end ports with inlet ports at longitudinal positions corresponding with the intermediate and end ports, said casing being provided at the other side of the intermediate and end ports with exhaust ports in the longitudinal positions corresponding to the intermediate and end ports, and a cylindrical valve rotatably mounted in the casing and having three-way passages therein communicatingl with said intermediate and end ports and adapted to register alternately with the inlet and exhaust ports to establish communication between the intermediate port and either the inlet or, exhaust port corresponding thereto, and establishing communication between the end ports and the corresponding inlet and exhaust ports alternately with respect to the intermediate port.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

IVER A. LYNNE.

Witnesses:

N. l?. READ, A. F. YOUNG.

Copie: ot this patent may be obtained for fve cents each, by addressing the Commissioner of Patents.

Washington, D. G.

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