US204640A - Improvement in balanced valves for steam-engines - Google Patents

Improvement in balanced valves for steam-engines Download PDF

Info

Publication number
US204640A
US204640A US204640DA US204640A US 204640 A US204640 A US 204640A US 204640D A US204640D A US 204640DA US 204640 A US204640 A US 204640A
Authority
US
United States
Prior art keywords
valve
steam
seat
cap
engines
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
Application number
Publication date
Application granted granted Critical
Publication of US204640A publication Critical patent/US204640A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00Fluid handling
    • Y10T137/8593Systems
    • Y10T137/86493Multi-way valve unit
    • Y10T137/86574Supply and exhaust
    • Y10T137/8667Reciprocating valve
    • Y10T137/86694Piston valve
    • Y10T137/8671With annular passage [e.g., spool]

Definitions

  • the object of my invention is to produce a perfectly-balanced valve, the wear of which may be taken up by an ordinary machinist without moving the engine to a machine-shop, and one that will have a large bearing-surface in proportion to its weight and capacity.
  • Figure l is a perspective view of so much of the steam chest and cylinder of an engine and of the valve as is necessary to illustrate my invention.
  • Fig. 2 is a transverse vertical section of the same, taken through the inductionpipe.
  • Fig. 3 is a plan view of the lower part of the valve-seat.
  • Fig. 4 is a detached view of the valve.
  • the valve is composed of the two square blocks A A, connected by a shank, A, and provided with a clamp or look, L, with which the valve-stem L engages.
  • the lower part of the valve-seat (represented in Fig. 3) is preferably formed in one piece with the cylinder and steam-chest.
  • the upper part 0 of the valve-seat is secured to the lower part by means of bolts or set-screws S, three, more or less, of these set-screws being used upon each side.
  • the dividing-line between the cap 0 and the lower part of the valve-seat is at the opposite horizontal corners of the valve; and the throats or passages c in said cap form, with the corresponding passage-ways b in the seat and cylinder, steam ports, which are alternately opened and closed by the valves A, as will be readily understood without further explanation.
  • P P represent dowel-pins, projectingupward- 1y from the valve-seat, these pins entering corresponding holes in the cap 0.
  • c 0 represent thin strips of copper or other similar soft metal
  • valve-seat interposed between the upper and lower parts of the valve-seat.
  • both the upper and lower parts of the seat consists of the V-shaped grooves, which fit accurately the angular sides of the blocks A of the valve; and, from the fact that each of the four sides of each block has the same sized and shaped bearing-surface, the wear produced by the friction will be uniform upon each of the sides, and will reduce the blocks in size, but not in shape, for which reason such wear may be readily compensated for by tightening the set-screws or bolts S and slightly compressing the packing-strips c 0'.
  • a large extent of port is provided for, While at the same time the joint between the seat and the valve is easily kept tight.
  • dowel-pins P preventtheloweredgcs of the cap 0 from being sprung outwardly between the set-screws S by the pressure of the steam within.
  • arib might be formed upon the edge of the lower part of the valve-seat, with which the lower edge of the upper part 0 should engage, forthe purpose of supportin g the partC against this outward pressure of the steam.
  • cap 0 separate and apart from the cap of the steam-chest greatly facilitates grinding down the joints between the cap 0 and the lower part of the seat, from the fact that these joints consist of two straight sides.
  • the dowel-pins P and the yielding packing are constructed and arranged substantially as set forth.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lift Valve (AREA)

Description

J. C. WELLS. Balanced Valve for Steam-Engines.
No. 204,640. Patented .lune 4,187. 8.
Witnsses'. Inventor cfwm MPETERS, PHDTO LITHOGRAFHER, WASHINGTON. D C.
UNITED PATENT QFFICE.
JAMES C. WELLS, OF WARREN, PENNSYLVANIA.
IMPROVEMENT IN BALANCED VALVES FOR STEAM-ENGINES.
Specification forming part of Letters Patent No. 204,640, ted June 4, 1878 application filed August 23,1876.
To all whom "it may concern:
Be it known that I, "JAMES C. 'WE'L'Ls, of Warren, in the county of Warren and State of Pennsylvania, have invented a new and Improved Valve for Steam-Engines; and I hereby declare that the following-is a clear and complete description thereof, reference being had to the accompanying drawings, forming part of this specification.
The object of my invention is to produce a perfectly-balanced valve, the wear of which may be taken up by an ordinary machinist without moving the engine to a machine-shop, and one that will have a large bearing-surface in proportion to its weight and capacity.
Figure l is a perspective view of so much of the steam chest and cylinder of an engine and of the valve as is necessary to illustrate my invention. Fig. 2 is a transverse vertical section of the same, taken through the inductionpipe. Fig. 3 is a plan view of the lower part of the valve-seat. Fig. 4 is a detached view of the valve.
B is the cylinder. D is the steam-chest. b c b c are the ports through which the steam passes to and from the cylinder. The valve is composed of the two square blocks A A, connected by a shank, A, and provided with a clamp or look, L, with which the valve-stem L engages.
The lower part of the valve-seat (represented in Fig. 3) is preferably formed in one piece with the cylinder and steam-chest. The upper part 0 of the valve-seat is secured to the lower part by means of bolts or set-screws S, three, more or less, of these set-screws being used upon each side.
The dividing-line between the cap 0 and the lower part of the valve-seat is at the opposite horizontal corners of the valve; and the throats or passages c in said cap form, with the corresponding passage-ways b in the seat and cylinder, steam ports, which are alternately opened and closed by the valves A, as will be readily understood without further explanation.
P P represent dowel-pins, projectingupward- 1y from the valve-seat, these pins entering corresponding holes in the cap 0. c 0 represent thin strips of copper or other similar soft metal,
interposed between the upper and lower parts of the valve-seat.
Steam is introduced through the opening 1 into the space within the valve-seat and between the blocks Aof the valve, passing thence into opposite ends of the cylinder through the ports, and from the cylinder into the space within the steam-chest, but outside of the valveseat and valve. As the valve is shifted backward and forward by the valve-gear, it will, of course, be understood that the blocks A of the valve fit steam-tight within the valve-seat; and in case of wear of the seat and valve the upper part or cap 0 of the said seat may be screwed down, so as to compensate for such Wear, as the strips 0', of comparatively soft metal, will yield sufficiently for that purpose.
There are some advantages incident to my construction of the valve-seat, as follows: From an examination of the drawings it will be seen that both the upper and lower parts of the seat consists of the V-shaped grooves, which fit accurately the angular sides of the blocks A of the valve; and, from the fact that each of the four sides of each block has the same sized and shaped bearing-surface, the wear produced by the friction will be uniform upon each of the sides, and will reduce the blocks in size, but not in shape, for which reason such wear may be readily compensated for by tightening the set-screws or bolts S and slightly compressing the packing-strips c 0'. Thus it will be seen that a large extent of port is provided for, While at the same time the joint between the seat and the valve is easily kept tight.
Another advantage which grows out of making the blocks A square is the increased strength of the upper part 0 of the valve-seat, as it will be readily understood that the central part of this cap 0 is not so liable to be sprung out from the valve, as it would be if it (the cap) were flat, while at the same time the valve may be packed tightly by means of the set-screws S, which would not be the case if the valve and seat were cylindrical in form.
It will also be seen that the dowel-pins P preventtheloweredgcs of the cap 0 from being sprung outwardly between the set-screws S by the pressure of the steam within.
It is also apparent that some of the advantages growing out of the use of the square valve may be enjoyed without the use of the strips 0' 0, because the valve might be packed by simply grinding down slightly the valve-seat at the point where the upper and lower portions are screwed together.
It is apparent that, instead of the dowel-pins P, arib might be formed upon the edge of the lower part of the valve-seat, with which the lower edge of the upper part 0 should engage, forthe purpose of supportin g the partC against this outward pressure of the steam.
From an examination of the drawings it will be seen my construction possesses some important advantages over those now in use. For instance, by forming the cap 0 separate and apart from the steam-chest D, I provide a free passage for the steam from the cylinder to the exhaust-pipe outside of the valve-seat and within the steam-chest, whereas it the cap constituted the cap of the chest, it would necessitate a steam-passage through the shank A or else a branching pipe connecting with the chest at both ends of the valve.
Again, making the cap 0 separate and apart from the cap of the steam-chest greatly facilitates grinding down the joints between the cap 0 and the lower part of the seat, from the fact that these joints consist of two straight sides.
What 1 claim isp 1. The herein-described balanced valve, consisting of the blocks A A, united by the shank A, in combination with the valve-seat provided with the ports I) c b c, the cap 0 being formed of a piece separate and apart from the steamchest D, substantially as set forth.
2. In combination with the upper and lower parts of the valve-seat, the dowel-pins P and the yielding packing, all constructed and arranged substantially as set forth.
JAMES C. WELLS.
Witnesses:
F. B. RICE, A. H. MCKELVY.
US204640D Improvement in balanced valves for steam-engines Expired - Lifetime US204640A (en)

Publications (1)

Publication Number Publication Date
US204640A true US204640A (en) 1878-06-04

Family

ID=2274044

Family Applications (1)

Application Number Title Priority Date Filing Date
US204640D Expired - Lifetime US204640A (en) Improvement in balanced valves for steam-engines

Country Status (1)

Country Link
US (1) US204640A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3225784A (en) * 1963-02-25 1965-12-28 George R Call Low pressure warning device
US20060007320A1 (en) * 2004-07-09 2006-01-12 Pentax Corporation Stage apparatus and camera shake correction apparatus using stage apparatus
US20060291679A1 (en) * 2005-02-25 2006-12-28 Burns Thomas H Microphone placement in hearing assistance devices to provide controlled directivity

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3225784A (en) * 1963-02-25 1965-12-28 George R Call Low pressure warning device
US20060007320A1 (en) * 2004-07-09 2006-01-12 Pentax Corporation Stage apparatus and camera shake correction apparatus using stage apparatus
US20060291679A1 (en) * 2005-02-25 2006-12-28 Burns Thomas H Microphone placement in hearing assistance devices to provide controlled directivity

Similar Documents

Publication Publication Date Title
US204640A (en) Improvement in balanced valves for steam-engines
US149019A (en) Improvement in balance slide-valves
US1226380A (en) Gate-valve.
US201151A (en) Improvement in balanced slide-valves
US677982A (en) Piston-valve.
US669284A (en) Reciprocating valve.
US599922A (en) Balanced valve
US319649A (en) Balanced slide-valve
US34310A (en) Improved valve for hydraulic engines
US56946A (en) Improvement in steam-engine valves
US166758A (en) Improvement in rotary balanced valves
US990305A (en) Engine-valve.
US189400A (en) Improvement in circular valves for steam-engines
US860255A (en) Piston-pump.
US312488A (en) Steam-valve
US434367A (en) Slide-valve for engines
US183909A (en) Improvement in balanced slide-valves
US1004395A (en) Steam-engine.
US200728A (en) Improvement in rotary valves
US152653A (en) Improvement
US394930A (en) Valve for steam-engines
US136985A (en) Improvement in balanced valves
US132649A (en) Improvement in valves for compound steam-engines
US229773A (en) Balanced valve
US154529A (en) Improvement in balance slide-valves