US433853A - Slide-valve - Google Patents
Slide-valve Download PDFInfo
- Publication number
- US433853A US433853A US433853DA US433853A US 433853 A US433853 A US 433853A US 433853D A US433853D A US 433853DA US 433853 A US433853 A US 433853A
- Authority
- US
- United States
- Prior art keywords
- valve
- steam
- slide
- chest
- seat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 230000001154 acute Effects 0.000 description 6
- 238000005461 lubrication Methods 0.000 description 2
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
- F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
- F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
- F16K11/0655—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with flat slides
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/86493—Multi-way valve unit
- Y10T137/86574—Supply and exhaust
- Y10T137/8667—Reciprocating valve
Definitions
- Thepurpose of this invention is to construct the slide-valve arranged in the steam-chest, and, as well known, adapted to be reciprocated on its seat, so as to obviate to a very considerable degree the loss of power required in moving the valve when the machine is in operation, and also otherwise to improve its working, all substantially as hereinafter described.
- Figures 1 and 2 are central longitudinal sections of the slide-valve of this invention and of the steam-chest and pistoncylinder.
- Fig. 3 is a section, line 3 3, Fig. 1.
- Fig. 4 is a view of the face of the valve, Fig. 2.
- A is the steam-chest.
- B is the piston-cylinder, having piston- C and steam-ports b b at its opposite ends and exhaust-port b midway of its length, severally opening to the steam-chest A, and which is adapted at A for admission of steam and at A as a seat for a slide-valve, all as ordinary and well known, and therefore needing no more particular explanation herein.
- valve D is the slide-valve, located in the steamchest A, and, as well known, adapted to be reciprocated on the seat A
- This valve D in section in the direction of its stroke is of V shape, and each of its legs (1 d has inner and outer faces (1 d respectively meeting each other at more or less acute angles d d and severally forming the front and rear walls of the valve,with a chamber between them closed at its sides (1 but open at (1 opposite the angles (1 d of the walls.
- the valve at its open side (1" seats on the valve-seat A of the steam-chest, and as to the seat the V-valve is inverted.
- the open side of the.valve in the direction ofthe valve-stroke is suitable to establish on each stroke of the valve communication between the exhaust-port and one steam-port of the cylinder and at the other steam-port between the piston-cylinder and steam-chest, as well-known in slide-valves.
- the inverted V-valve at its opposite ends has parallel perpendicular walls D D, knife-edged at top, making part of it.
- the inner faces of the perpendicular walls D and the outer faces of the inclined walls of the valve are ports D D at each end of the valve, for communication to be made through steam-chambers D D at opposite ends of the valve with the steam-ports of the piston-cylinderand the steam-chest.
- the perpendicular walls D are necessary and essential to the operation of the valve, as explained, and are only advantageous to the extent that they help protect the valve against the action of the steam to upwardly cant it on its seat, which is more or less liable to occur if the steam is allowed to act laterally directly on the outer faces of the inclined walls of the valve, and more perfectly directs the steam to the open steam-ports of the valve.
- each inclined end wall of the inverted V-valve at its contactface has a chamber or space c1 to receive live steam on each stroke of the valve and to inclose it at certain portions and to set it free at other portions of the valve-stroke, and thus secure to a greater or less extent pressure of steam on the valve to counterbalance its weight, and the pressure of steam exerted on the valve to press it to its seat and to assist in the lubrication of the valve-seat, all obviously advantageous.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Multiple-Way Valves (AREA)
Description
(N0.M0del.)
, G. W. DE GEOFF.
SLIDE VALVE.
No. 433,853. Patented Aug. 5, 1890.
WITNESSES.
UNITED STATES PATENT OFFICE.
GEORGE IV. DE GROFF, OF BOSTON, MASSACHUSETTS.
SLIDE-VALVE.
SPECIFICATION forming part Of Letters Patent No. 433,853, dated August 5, 1890. Application filed July 13,1888. Serial No, 279,864. (No model.)
To all whom it may concern.-
Be it known that I, GEORGE \V. DE GEOFF, of the city of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Slide-Valves for Steam-Engines, &c., of which the following is a full, clear, and exact description.
Thepurpose of this invention is to construct the slide-valve arranged in the steam-chest, and, as well known, adapted to be reciprocated on its seat, so as to obviate to a very considerable degree the loss of power required in moving the valve when the machine is in operation, and also otherwise to improve its working, all substantially as hereinafter described.
In the drawings forming part of this specification, Figures 1 and 2 are central longitudinal sections of the slide-valve of this invention and of the steam-chest and pistoncylinder. Fig. 3 is a section, line 3 3, Fig. 1. Fig. 4: is a view of the face of the valve, Fig. 2.
In the drawings, A is the steam-chest.
B is the piston-cylinder, having piston- C and steam-ports b b at its opposite ends and exhaust-port b midway of its length, severally opening to the steam-chest A, and which is adapted at A for admission of steam and at A as a seat for a slide-valve, all as ordinary and well known, and therefore needing no more particular explanation herein.
D is the slide-valve, located in the steamchest A, and, as well known, adapted to be reciprocated on the seat A This valve D in section in the direction of its stroke is of V shape, and each of its legs (1 d has inner and outer faces (1 d respectively meeting each other at more or less acute angles d d and severally forming the front and rear walls of the valve,with a chamber between them closed at its sides (1 but open at (1 opposite the angles (1 d of the walls. The valve at its open side (1" seats on the valve-seat A of the steam-chest, and as to the seat the V-valve is inverted. The open side of the.valve in the direction ofthe valve-stroke is suitable to establish on each stroke of the valve communication between the exhaust-port and one steam-port of the cylinder and at the other steam-port between the piston-cylinder and steam-chest, as well-known in slide-valves.
As shown, Fig. 1, the inverted V-valve at its opposite ends has parallel perpendicular walls D D, knife-edged at top, making part of it. The inner faces of the perpendicular walls D and the outer faces of the inclined walls of the valve are ports D D at each end of the valve, for communication to be made through steam-chambers D D at opposite ends of the valve with the steam-ports of the piston-cylinderand the steam-chest. The perpendicular walls D are necessary and essential to the operation of the valve, as explained, and are only advantageous to the extent that they help protect the valve against the action of the steam to upwardly cant it on its seat, which is more or less liable to occur if the steam is allowed to act laterally directly on the outer faces of the inclined walls of the valve, and more perfectly directs the steam to the open steam-ports of the valve.
As shown, Figs. 2 and at, each inclined end wall of the inverted V-valve at its contactface has a chamber or space c1 to receive live steam on each stroke of the valve and to inclose it at certain portions and to set it free at other portions of the valve-stroke, and thus secure to a greater or less extent pressure of steam on the valve to counterbalance its weight, and the pressure of steam exerted on the valve to press it to its seat and to assist in the lubrication of the valve-seat, all obviously advantageous.
An advantage which comes from the peculiar V shape of the valve may be described as follows: When the steam commences to flow from the steamchest through a partiallyopen port, there is a wedging force applied against the sloping side of the V-shaped projection of the valve which tends to start it in its forward course.
Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is
1. The combination, with a steam-chest havinga valve-seat with steam and exhaust ports, of an inverted V slide-valve located in said steam-chest and having inclining end walls with inner and outer faces meeting at acute angles and opposite thereto open and seating on the valve-seat of the steam-chest, substantially as described, for the purpose specified.
2. The combination, with a steam-chest havsteam-chest and having" inclining Walls with inner and outer faces meeting at acute angles 15 and opposite thereto open, and provided with steam chambers or spaces, and seating on the valve-seat of the steam-chest, substantially as described, for the purpose specified.
In testimony whereof I have hereunto set 20 my hand in the presence of two subscribing witnesses.
GEO; WV. DE GEOFF.
Witnesses:
ALBERT W. BROWN, EDWARD HAMILTON.
Publications (1)
Publication Number | Publication Date |
---|---|
US433853A true US433853A (en) | 1890-08-05 |
Family
ID=2502756
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US433853D Expired - Lifetime US433853A (en) | Slide-valve |
Country Status (1)
Country | Link |
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US (1) | US433853A (en) |
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- US US433853D patent/US433853A/en not_active Expired - Lifetime
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