US1030167A - Oscillating valve. - Google Patents

Description

J. W. DAVIS.

OSCILLATING VALVE.

APPLIOATION FILED JAN. 9, 1912.

1,030,167, l Patented June 18, 1912.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

JOHN w. DAvIs, or WHITEFISH, MONTANA, AssIGNOR or ONE-HALE` To CHARLES e. HALL, or wHITHrIsH, MONTANA.

OSCILLATING VALVE.

Specification of Letters Patent.

` Patented June 18, 1912.

Application led January 9, 1912. Serial No. 670,165.

To all whom it may concern;

Be it kno-wn that I, JOHN W. DAVIS, a citizen of t-he United States, and a resident of Whiteiish, in the county of Flathead and State of Montana, have invented a new and Improved Oscillating Valve, of which the following is a full, clear, and exact de` scription.

This invention relates particularly to improved oscillating valves for locomotives, and has for'an object the construction and arrangement of improved means for permitting the engine to run free when the valve is shut off.

Another object of the invention is the arrangement of an improved valve structure which will automatically connect the intake ports and exhaust ports of the cylinder when the steam is shut olf so that the Vpiston may freely move without creating anyback pressure.

In carrying out the objects of the invention, a housing is connected to the cylinder so that the ports of the cylinder will regis ter with simi-lar ports in the housing. Mounted in this housing is an oscillating valve member formedas a cylinder open at one end with the exhaust ports arranged to register at predetermined times with the ports of the cylinder. Connected with the valve member is an operating mandrel or shaft which is connected to the usual link block on the engine through a lcrank and connecting rod, so that the valve1 member will oscillate in proper timed relationship to the other moving parts of the engine. This structure permits the valve to remain stationary when the engine is drifting provided thereversing lever is set on the balance or center.

. yA practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters' of reference indicate corresponding party in all the views.

Figure' 1 is'a transverse vertical section through avalve formed according to the present invention, the same being taken on the line 1 1 of Fig. 5; Fig. 2 is a section through Fig. 5" on the line 2 2, the same j being shown'in an enlarged scale g' Fig. 3 is a section through Fig. 2 on the line 3 3; Fig. 4t is a similar section to Fig. 3, exceptl that the parts are shown in their inoperative positions assumed when the engine is drifting; and Fig. 5 is a longitudinal vertical section through Fig. 1, partially on the line 5 5.

Referring to the accompanying drawings by numerals,` 1 indicates a cylinder in which the usual piston of a locomotive moves. The cylinder 1 is provided with an exhaust port 2 and intake ports 3 and 4f. All of these ports register with similar ports 2, 3, and L1', in the housing 5 of the valve.

Arranged in the housing 5 is a rotating valve member 6 which is mounted upon a mandrel or operating shaft 7, supported in bearings 8, 9, and 10. The bearing 8 is part of a spider 1 formed integral with the intake end of the housing 5; the bearing 9 is formed integral with the removable end plate or head 12 of the housing 5, While the bearing 10 is formed integral with the bracket or projection 13 extending from the head 12. The head 12 is bolted or other- -wise rigidly secured to the housing 5, whereby the rotating valve member 6 may be applied and removed whenever desired. From Fig. 5 it will be seen that the bearings 9 and 10 are spaced apart for accommodating the enlargement 14 of a crank 15. The crank 15 is connected to the usual valveshifting rod of a locomotive so that when the crank 15 is oscillated back and forth the valve member 6 will be also oscillated and caused to allow steam to enter the respective ports 3 and 4, and to alternately exhaustout port 2. The shaft 7 is rigidly keyed tothe valve member 6 at both ends of the valve member for insuring a proper back `and forth movement of the vvalve member. A spherical bearing member 16 is also keyed to the shaft 7 and adapted to bear against the hollowed out portion 17 formed in the head 12. The spherical bearing member 16 is designed to press Vtightly against the end 18 of the valve member 6, and to slidingly Contact with the bottom of the socket 17.

From Fig. 5 it will be noted, however, that the spherical bearing member 16 is made of such a size as to'provide an opening 19 in the end 18 and head 12. A similar opening 20 is providedbetween a spider 21 and the spider 11 at thefintake end of the valve member 6.

The valve member 6 is made cylindrical in shape with the intake end formed as a spider 21, so as to permit steam to freely enter from a pipe 22 as long as the throttle is open. In addition to the spaces 19 and 110 can enter 2() at the ends of the valve member 6, a space'23 is provided around the circiimference of the valve memberV 6 between the same and the housing 5. Packing rings Q4 and 25 are provided for preventing steam from entering the opening 23 unless per initted to do so by bearing plates 27,28, 29,

30, 31, Vand 32. However, the ends of the valve member are in continuous communication with the steam within the valve mem ber so that the' valve member is balanced and thus reduces the friction to a minimum. kThe valve member 6 is provided with ports 33 and 34 which supply live steam to the ports 3 and 4, and is also provided with a single comparatively large port .35 designed to alternatelyl exhaust ports 3 and 4. The bearing plates 27 and QSVare arranged on each side of the port 33 and are designed to pressagainst the housing 5 when live steam is being supplied to the interior of the valve member 6. This is also true of the remaining bearing plates so that none ofthe steam the opening 23. The respective 'bearing plates are held to the position shown in Fig 1 by pistons 36 connected with piston rods 37, which in turn are connected with an extension 38 formed preferably integral lwith the respective bearing plates.

A guiding .slot is provided for the extension 38, and also a` guiding slot is provided for the bearing plate proper, whereby when live steam is pressing on the piston 36 the respective. bearing plates will be depressed as shown in Figs. 1, 2, and 3. When the steam has been shut ott' from the valve, a spring 39 associated with each of the pistons 36 will act on the respective pistons and .upon a shoulder 40and raise the bearing plates to the position shown in Fig. 4. This will permit a free communication between both. the ports 3 and 4 and the exhaust port 2', so that when the engine is running free or kdrifting the piston in the cylinder l will not create any back pressure. Also it will be noted that by reason of the fact thatv the crank 15 isipositioned opposite a point midway between ports 33 and 34, the valve mem'- ber 6 will beheld stationary if the reversing mechanism of the engine is placed on the balance or4 center. The reversing mechanism of the engine-is designed to be placed in this position whenever the Vengine is'drift- Y ing so that there will be no wear on thevalve.

By the arrangement of the ports described, ample openings are provided orthe free admission and exhaustion of theV steam as the valve may be made of any desired length and the ports made .for substantially the full length of the valve.

`Having thus 'j described my invention, I

claimas new and desire to secure by Letters Patent:

f ,i 1. In an oscillating valve, the combination with a cylinder and operating means for the valve, of a valve structure formed with a housing having ports registering with the ports of the cylinder, an oscillating valve member in said housing connected with said operating means, said valve member being smaller than said housing and thereby providing a space between the hous-u ing and the valve member, means mounted on said oscillating valve member for making a tight joint on each side of each of said ports when the steam pressure is applied, springs for-actuating said means for raising thes ame when the pressureA has been re-` moved whereby all of said ports are in communication through the space between said `30 valve structure and said housing.

'2. In an oscillating valve the combination with a cylinder and operating means for the valve, of a valve structure formed with a housing having ports registering with the 'g5 ports of said cylinder, an oscillating valve Vmember arranged in said housingl and spaced therefrom, a radially movable plate y arranged on each side of eachof the ports in said valve member, a spring for normally holdingV said valve member `out of contact with said ho-iising, and a piston construction connected with each of said platesfor being actuated by pressure when the same has been turned on to said valve member whereby Y there will be a tight joint on each side of each of said ports whenV the steam pressure4 is applied and a passageway will be provided between all of said valvesV and all of said ports when said pressure has been relieved.

3. In a valve, a housing formed with a plurality otl intake ports and an exhaust port, a rotating valve member arranged in said housing ports designed to register `with said intake ports and an exhaust arranged to register alternately with said intake ports, a bearing plate on each side of each of the ports in said valve member normally held against said housing by the steam pressure in the valve member, and means for automatically raising the bearing plates from contact with said housing for providing a path from both of said intake ports to said rst mentionedli exhaust port when the steam pressure is'relieved.

4. In an oscillating valve, the combina# tion with a cylinder, of a Valve casing mounted on said cylinder formed with lports registering with the ports of thecylinder, a cylindrical valve member arranged in said' casing formed with a pair of ports register- 4 ing with the intake ports of said cylinder n, and an exhaust port registering alternately with said intake ports and continuously with; the exhaust port, av bearing platearrangedl on each side of Veach of the ports in said" valve member, means` connected with each I of said plates extending to a position in 130 formed with a plurality of 16S communication with the interior of said valve member for being operated by the pressure therein for holding said plates in a predetermined lowered position, and a spring for each of said plates for raising the plates when said pressure has been removed.

5. In an oscillating valve, a housing formed with a plurality of intake ports and a single exhaust port, an oscillating cylindrical valve member arranged in said housing and spaced from said housing for deining an annular opening, said valve member being formed with an exhaust passageway and a pair of ports registering alternately with said intake ports, a bearing plate arranged on each side of each of the ports in said valve member for preventing communication between said ports and said annular opening between the housing and the valve member, and a spring for each of said plates for retracting the plates, whereby all of said intake ports and all of said exhaust portsare thrown into free communication.

6. An oscillating valve comprising a cylindrical oscillating valve member formed with one end substantially open for receiving fluid under pressure, said valve member being formed with a pair, of outlet ports and an exhaust passageway, a bearing plate arranged on each side of each of said ports ing said valve member and spaced therefrom plates being positioned in sockets formed in said valve member, a piston in free communication with the interior of said valve member connected with each of said bearing plates whereby when a fluid under pressure is admitted to said valve member, said bearing said valve member and spaced therefrom their retaining sockets, a housin surrounding said valve member and spaced therefrom adapted to have said bearing plates pressed against the same, a spring for each of said bearing plates for retracting the bearing plates when the Huid pressure is shut on?, said housing being formed with a pair of intake ports and an exhaust port, said ports being in free communication through the annular space between said housing and said valve member when said springs have retracted said bearing plates.

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

JOI-IN W. DAVIS.

. Witnesses J. T. LINDBE, H. T. SENAY.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.

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