US79182A - ashqroft - Google Patents
ashqroft Download PDFInfo
- Publication number
- US79182A US79182A US79182DA US79182A US 79182 A US79182 A US 79182A US 79182D A US79182D A US 79182DA US 79182 A US79182 A US 79182A
- Authority
- US
- United States
- Prior art keywords
- valve
- steam
- primary
- diaphragm
- spring
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 210000000088 Lip Anatomy 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 206010010254 Concussion Diseases 0.000 description 2
- 241001631455 Opeia Species 0.000 description 2
- 241001274197 Scatophagus argus Species 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 238000004326 stimulated echo acquisition mode for imaging Methods 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
- F16K17/0433—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with vibration preventing means
-
- 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
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7738—Pop valves
Definitions
- Figure l is a vertical-,and centralrsection of my invention.
- One purpose of my present invention is to remedy this defect, and to this end I provide the lower part of the opening or steam-chamber a of the hollow base, b, of' the valve with a foraminous diaphragm, c, suitably fixed therein, and through which the steam passes i'rom the boiler to Ithe valve.
- Another portion of my invention is to provide a means whereby, upon fracture or failure of the spring of the valve, the escape of steam therefrom is out oi. p
- the said auxiliary valve e is designed to perform two oirices, viz, first, ⁇ to break a current 'of' water being drawn by and with the escaping steam into the open air, upon the sudden action of the steam upon the primary valve g; second, to act as a stop safety-valve, in the event of the fracture or breaking of thc springt' of the valve g. 4 p l
- the spring z' which serves to depress the 'primary valve, become broken or '(iisabled, thc upward pressure of the steam upon the'lowcr and auxiliary valve e, ⁇ will force such valve tightly up to its seat, and by this means prevent the escape and loss of steam, which would otherwise find free vent into the open air, and perhaps lead to fatal results.
- the primary valve g is formed with a surA roundingdip or ledge, c, the valve thus provided being enclosed by a second lip or ledge, Z, formed upon or around its valve-seat, as vshown in the drawing.
- the ledge k has thc effect, upon the raising of the valve, of causing an accumulation of steam within the enclosure, m, formed by it, 'until such accumulation has acquired the power of lifting the valve, which it does with a sudden concussion or snap.
- the lip lor ledge l serves the purpose of preventing too great lateral spreading of the steam as it escapes in It will further be perceived, on referring to the drawing, that I form in the bearing-face of the primary valve iq, an annular groove or recess, n. The water resulting from the condensation of steam collects within this recess or groove, and serves as a packing between the valve and its scat, when closed.
- valves g and c The construction of the valves g and c, valv@l e, openingf, spring i, and diaphragm c, su
- valve g stem d, with the base, Z); and spring i', substantially and the arrangement caf-the recessesr n, and ⁇ fm, ledges lc and Z,
Description
uiten tstrs .gstrat ffies.
Letters Patent No. 79,182, dated June 23, 1868.
IMPROVEMENT tu STEAM SAFETY-Vanves.
@ige tgemrle entre te it tlgcse trttets ttrnt mrt ranting wat nf tte Smic.
TO ALL WHOM IT MAY CONGERN:
Be it known that I, EHlAsHcROFT, of Lynn, county ofEsscX, and State ofMassachusetts, have invented a new and useful Improvement in Steam Safety-Valves; and'I do hcrebyvdeclare that the following is a full and exact description thereof, reference being had to the accompanying drawing, and to the letters of reference marked thereon,l in which like letters represent like parts.
Figure l is a vertical-,and centralrsection of my invention. I
` To enable others skilled inthe art to make and use my invention, I will proccedto describe its construction and operation. A i i My present invontion'hmay be considered as an vimprovement upon that for which Letters Patent ot' the United States were issued to me on the 21st day of April, 1868.
Intlie practical opeia'igionof the safety-valve referred to in said patent, above referred to, it was found that the sudden action of the valve had the tendency of drawing or lifting'a considerable quantity of water, and carrying it from the boiler with the escaping steam.
One purpose of my present invention is to remedy this defect, and to this end I provide the lower part of the opening or steam-chamber a of the hollow base, b, of' the valve with a foraminous diaphragm, c, suitably fixed therein, and through which the steam passes i'rom the boiler to Ithe valve.
In its passage through the diaphragm c, the steam is wirc-drawn, as it is termed by engineers, or caused to separate from any great quantity of moisture or water takenup by it, which will not pass through such diaphragm. l v
Another portion of my inventionis to provide a means whereby, upon fracture or failure of the spring of the valve, the escape of steam therefrom is out oi. p
In carrying out this part of my invention, I screw or otherwise secure to the lower end of the valvestem d ofthe primary valve g, an auxiliary valve, e, and I also form in the base ofthe steam-chamber or passage, a, of the valve anl auxiliary valveseat,f, disposed below the primary valve, and valve-scat g or L, as represented, the two valves being so arranged, with respectl'to each other 'and their seats, that when the primary valve g is controlled and operated as designed by the valve=spring z', the auxiliary valve e shall be and remain open, so as not to obstruct the action of' the steam upon the primary and acting valveg.
The said auxiliary valve e is designed to perform two oirices, viz, first,` to break a current 'of' water being drawn by and with the escaping steam into the open air, upon the sudden action of the steam upon the primary valve g; second, to act as a stop safety-valve, in the event of the fracture or breaking of thc springt' of the valve g. 4 p l Should the spring z', which serves to depress the 'primary valve, become broken or '(iisabled, thc upward pressure of the steam upon the'lowcr and auxiliary valve e,`will force such valve tightly up to its seat, and by this means prevent the escape and loss of steam, which would otherwise find free vent into the open air, and perhaps lead to fatal results. i Y Y v By referring to the accompanying drawing, it will be seenthat the primary valve g is formed with a surA roundingdip or ledge, c, the valve thus provided being enclosed by a second lip or ledge, Z, formed upon or around its valve-seat, as vshown in the drawing. The ledge k has thc effect, upon the raising of the valve, of causing an accumulation of steam within the enclosure, m, formed by it, 'until such accumulation has acquired the power of lifting the valve, which it does with a sudden concussion or snap. -v
The lip lor ledge l'serves the purpose of preventing too great lateral spreading of the steam as it escapes in It will further be perceived, on referring to the drawing, that I form in the bearing-face of the primary valve iq, an annular groove or recess, n. The water resulting from the condensation of steam collects within this recess or groove, and serves as a packing between the valve and its scat, when closed.
Having thus described my invention, what I claim, as new, and desire to secure by Letters Patent of the United States, is-
1. The combination of the diaphragm c, valve e, as herein set forth.
2. The construction of the valves g and c, valv@l e, openingf, spring i, and diaphragm c, su
valve g, stem d, with the base, Z); and spring i', substantially and the arrangement caf-the recessesr n, and` fm, ledges lc and Z,
bstantially as herein setforth. v y
' E. H. ASHCROFT.
- Witnesses:
EDWIN J. WRIGHT, CHARLES E. As-nenonr.
Publications (1)
Publication Number | Publication Date |
---|---|
US79182A true US79182A (en) | 1868-06-23 |
Family
ID=2148681
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US79182D Expired - Lifetime US79182A (en) | ashqroft |
Country Status (1)
Country | Link |
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US (1) | US79182A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3677286A (en) * | 1970-11-25 | 1972-07-18 | Bloomfield Valve Corp | Valve |
-
0
- US US79182D patent/US79182A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3677286A (en) * | 1970-11-25 | 1972-07-18 | Bloomfield Valve Corp | Valve |
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