US361647A - Ors of one-thied to saeah l - Google Patents
Ors of one-thied to saeah l Download PDFInfo
- Publication number
- US361647A US361647A US361647DA US361647A US 361647 A US361647 A US 361647A US 361647D A US361647D A US 361647DA US 361647 A US361647 A US 361647A
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- US
- United States
- Prior art keywords
- valve
- slide
- steam
- piston
- balancing
- 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
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- 230000000694 effects Effects 0.000 description 4
- 230000003137 locomotive Effects 0.000 description 4
- 241000272519 Aix Species 0.000 description 2
- 210000001560 Chin Anatomy 0.000 description 2
- 229910000754 Wrought iron Inorganic materials 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000001105 regulatory Effects 0.000 description 2
Images
Classifications
-
- 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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
- F16K3/16—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with special arrangements for separating the sealing faces or for pressing them together
- F16K3/18—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with special arrangements for separating the sealing faces or for pressing them together by movement of the closure members
- F16K3/188—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor with special arrangements for separating the sealing faces or for pressing them together by movement of the closure members by means of hydraulic forces
Definitions
- WiLsoN W. PRIMM and JEAN B. PRIMM citizens of the United States, residing at the city of St. Louis, State of Missouri, have invented a certain new and useful Improvement in Balanced Slide-Valves for Steam-Engines, of which the following is a full, clear, and exact description.
- Our invention relates to improved means of balancing the slide-valves of locomotive and other steam engines, and it consists in the combination,with a slide-valve and its steam-chest and a balancing-piston connected with the slide-valve, of a pipe or passage communicating with the piston-cylinder and with the atmosphere, a pipe or passage communicating with the steam-chest and with the atmosphere, and
- Figure 1 is a longitudinal section of the slide-valve of a steam-engine fitted with our invention
- Fig. 2 a transverse section of the same
- Fig. 3, a part plan thereof
- Fig. 4 a transverse section showing additional features of our invention as applied to locomotive slide-valves, or where varying backpressure on the slidevalve has to be counteracted, like letters of reference denoting like parts in all the figures.
- a represents a slide-valve, and Z) the steam-chest, in the cover c of which is a cylinder, d, of suitable area, as hereinafter more particularly referred to, and opening at one end into the steam-chest b.
- a piston, e connected atits inner or under side, nearest the steam-chest b, to the top of the slide-valve a by a connecting-rod, f, the steam from the steam-chest b pressing against the under side of the piston e, and thereby counterbalancing the downward pressure on the slide-valve a.
- the rod or pin g which couples the slide-valve a to the connecting-rod f, extends entirely across the top of the slide-valve a and has its bearings in four lugs, 72, the bolts of which pass through the top of the slide-valve a, and are secured thereat by nuts screwed against packing-strips i, of wrought-iron or other suitable material, in- ⁇ terposed between the nuts and the under side of the slide-valve a, this arrangement being particularly intended for the application of our invention to existing slide-valves; but in the case of new valves the lugs h may be cast on the slide-valve a without the necessity of the bolts, nuts, and packing-strips, as shownv in Fig. 4.
- the outer or upper end of the cylinder d is closed by a cover, j, and communicates by means of a pipe, k, with branch 1 of a threeway cock, Z, or other suitable regulating threeway valve, branch 2 of which is open to the atmosphere, and branch 3 communicating with the steam-chest b by means of pipe m.
- the plug of the three-way cock Z may be 0perated by the hand-wheel n, or by levers and rods, as found most suitable.
- the three-way cock Z being adjusted so that branches 1 and 2 are in communication, and air thereby admitted from the atmosphere through pipe k into the cylinder d above the balancing-piston e, the engine is started, and as the slide-valve a reciprocates the balancing-piston e is also reci procated and adj usted to the varying positions of the slide-valve a by the connectingrod f, any resistance to the movement of the piston e by the expansion or compression of ⁇ the air on its other side being prevented by the free inlet or exit of the air through the three-way cock Z and pipe 7c.
- a valve, o is fitted in the exhaust-passage p and loaded to a normal back-pressure by means ot a spiral spring, q.
- the chamber of this valve o communicates with the space above the balancing-piston e by pipe 1 ⁇ , so that When the back-pressure on the-slide-valve a exceeds that to which the valve 0 is loaded the valve o opens, and, admitting steam above the balancing-piston e, causes the pressure on the latter to counterbalance the excessive back-pressure on the slide-valve a.
Description
(No Model.) 2 Sheets-Sheet 1.
W. W. 8v J. B. PRIMM.
BALANGED SLIDE VALVE..
(No Model.) 2 Sheets- Sheet 2.
W. W. 8v J. B. PRIMM v BALANOED SLIDE VALVE.
N0. 361,647. Patented Apr. 19, l1887.
Zay-1%. $95 f 7" WIFZWEAS//Z/S I [WIT/rfa? M @MGM/wm,
NITED STATES PATENT ENCE. i
VILSON W. PRIMM AND JEAN B. PRIMM, OF ST. LOUIS, MISSOURI, ASSIG- ORS OF ONE-THIRD TO SARAH L. PRIMM, OF SAME PLACE.
BALANCED SLIDE-VALVE..
SPECIFICATION forming part of Letters Patent No. 361,647, dated April 19, 1887.
' Application tiled December 30, 1886. Serial No. 223,009. (No model.)
.To all whom it may concern.-
Be it known that we, WiLsoN W. PRIMM and JEAN B. PRIMM, citizens of the United States, residing at the city of St. Louis, State of Missouri, have invented a certain new and useful Improvement in Balanced Slide-Valves for Steam-Engines, of which the following is a full, clear, and exact description.
Our invention relates to improved means of balancing the slide-valves of locomotive and other steam engines, and it consists in the combination,with a slide-valve and its steam-chest and a balancing-piston connected with the slide-valve, of a pipe or passage communicating with the piston-cylinder and with the atmosphere, a pipe or passage communicating with the steam-chest and with the atmosphere, and
l a three-way valve controlling both pipes or passages, whereby steam may be admitted to the piston-cylinder and air to both cylinder and steam-chest at will.
It also consists in the combination, with a slide-valve and balancing-piston, of a port or passage leading from the exhaust-passage to the cylinder of the balancing-piston and a loaded valve for counteracting the effect of varying back-pressure on the slide-valve.
It also consists in minor details of construction, which will hereinafter more fully appear.
On the accompanying drawings, Figure 1 is a longitudinal section of the slide-valve of a steam-engine fitted with our invention; Fig. 2, a transverse section of the same; Fig. 3, a part plan thereof; and Fig. 4, a transverse section showing additional features of our invention as applied to locomotive slide-valves, or where varying backpressure on the slidevalve has to be counteracted, like letters of reference denoting like parts in all the figures.
Referring particularly to Figs. 1 to 3, a represents a slide-valve, and Z) the steam-chest, in the cover c of which is a cylinder, d, of suitable area, as hereinafter more particularly referred to, and opening at one end into the steam-chest b. In the cylinder d is fitted a piston, e, connected atits inner or under side, nearest the steam-chest b, to the top of the slide-valve a by a connecting-rod, f, the steam from the steam-chest b pressing against the under side of the piston e, and thereby counterbalancing the downward pressure on the slide-valve a.
As shown in Figs. 1 to 3, the rod or pin g, which couples the slide-valve a to the connecting-rod f, extends entirely across the top of the slide-valve a and has its bearings in four lugs, 72, the bolts of which pass through the top of the slide-valve a, and are secured thereat by nuts screwed against packing-strips i, of wrought-iron or other suitable material, in-` terposed between the nuts and the under side of the slide-valve a, this arrangement being particularly intended for the application of our invention to existing slide-valves; but in the case of new valves the lugs h may be cast on the slide-valve a without the necessity of the bolts, nuts, and packing-strips, as shownv in Fig. 4.
The outer or upper end of the cylinder d is closed by a cover, j, and communicates by means of a pipe, k, with branch 1 of a threeway cock, Z, or other suitable regulating threeway valve, branch 2 of which is open to the atmosphere, and branch 3 communicating with the steam-chest b by means of pipe m. The plug of the three-way cock Z may be 0perated by the hand-wheel n, or by levers and rods, as found most suitable. The three-way cock Z being adjusted so that branches 1 and 2 are in communication, and air thereby admitted from the atmosphere through pipe k into the cylinder d above the balancing-piston e, the engine is started, and as the slide-valve a reciprocates the balancing-piston e is also reci procated and adj usted to the varying positions of the slide-valve a by the connectingrod f, any resistance to the movement of the piston e by the expansion or compression of `the air on its other side being prevented by the free inlet or exit of the air through the three-way cock Z and pipe 7c.
An equilibrium is obtained between the steam-pressure on the balancing-piston @and the pressure of steam less the back-pressure on the slide-valve a by observing the following formula: The area of the slide-valve in square inches multiplied by the pressure of steam per square inch, minus the area of the exhaust-space beneath the slide-valve multiplied by the back-pressure, is equal to the area of the balancing-piston e. When the ICO ) slide-valve a, steam may also be admitted Y comotive slide-valve, Where the Vback-pressure steam is' shut-off from the steam-chest b and I the slide-valve c is. being moved by the mo` mentum of the engine, air :may be admitted 'to the steam-chest b by moving the three-way cock Z so that branches 2 and 3 and pipe m are in communication.
In case of the lifting or displacement of the from the steam-chestb to the cylinder d, above the balancing-piston e, by moving the threeway cock Z so that branches l and 3 and pipes k and m are in communication, the effect of this being to return the slide-valve a to its proper position.
In the illustration of our invention shown in Fig. et, which is specially adapted to a loon the slide-valve a is constantly varying, a valve, o, is fitted in the exhaust-passage p and loaded to a normal back-pressure by means ot a spiral spring, q. The chamber of this valve o communicates with the space above the balancing-piston e by pipe 1^, so that When the back-pressure on the-slide-valve a exceeds that to which the valve 0 is loaded the valve o opens, and, admitting steam above the balancing-piston e, causes the pressure on the latter to counterbalance the excessive back-pressure on the slide-valve a. In this case the inflowing steam through pipe a" to the space above the balancing-piston e is prevented from escaping through the three-way cock Z into the atmosphere by a spring-Valve, s, which is itted Yat and closed over the mouth of branch 2 of the three-Way cock Z by the pressure of the steam unt-il the balance of pressure on the slide-valve a is restored, when'the valve s will be opened by its spring, and free passage of air given through the three-Way cock Z, as before.
We claim as our invention 1. The combination, with a slide-valve and a balancing-piston, of a port or passage leading from the exhaust to the cylinder of the balancing-piston, and a loadedvalve, substantially as and for the purposes specified.
2. Ihe combination, with a slide-valve and its balancing-piston, of the lugs h, provided with bolts, packing-strips '13, rod or pin g, and connecting-rod f, substantially as and for the purposes specified.
3. In a steam-engine balancing slide-Valve, the combination of balancing-piston e, connected with slide-valve a and Working in cylinder b, a pipe or passage leading to the cylinder of the balancing-piston, a pipe or passage leading to the steam-chest, and three-Way cock communicating with the atmosphere, substantially as shown, and for the purpose described.
4. In a steam-engine balancing slide-valve, the combination of balancing-piston e, connected with slide-valve a and Working in cylinder b, Valve o, pipes i k, three-way cock Z, and spring-valve s, substantially as shown, and for the purpose described. y
In testimony whereof we aix oursignatures,
in presence of ltwo witnesses, this 13th day of December, 1886. l
WILSON W. PRIMM. JEAN B. PRIMM. Witnesses:
S. L. SCHRADER, Louis D. PICOT.
Publications (1)
Publication Number | Publication Date |
---|---|
US361647A true US361647A (en) | 1887-04-19 |
Family
ID=2430681
Family Applications (1)
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US361647D Expired - Lifetime US361647A (en) | Ors of one-thied to saeah l |
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US (1) | US361647A (en) |
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