US160167A - Improvement in safety-valves - Google Patents
Improvement in safety-valves Download PDFInfo
- Publication number
- US160167A US160167A US160167DA US160167A US 160167 A US160167 A US 160167A US 160167D A US160167D A US 160167DA US 160167 A US160167 A US 160167A
- Authority
- US
- United States
- Prior art keywords
- valve
- boss
- steam
- safety
- improvement
- 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
- 238000010276 construction Methods 0.000 description 4
- 230000003247 decreasing Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000036633 rest Effects 0.000 description 2
- 230000000284 resting Effects 0.000 description 2
- 230000000630 rising Effects 0.000 description 2
- 230000000153 supplemental 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
- 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
-
- 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
- Y10T137/7741—Pop pressure reactor in branched released path
- Y10T137/7742—Separate relief valves or valves for each branch
-
- 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
- Y10T137/7744—Adjustable choke
- Y10T137/7745—Annular lip or baffle
- Y10T137/7747—Screw threaded
Definitions
- This differential pressure is obtained by means of an auxiliary steam-discharge, opened for escape of steam by the lifting ofthe main valve, and
- FIG. l is a perspective view of a safetyvalve embodying my improvements.
- Fig. 2 is a vertical central section of the same.
- Fig. 8 is a perspective view of the shell and valveseat, uncovered.
- A is the shell, of ordinary construction, except in the particulars hereinafter noted, formed at top with valve-seat a, and centerbearing b, for the valve-spindle B, which is compassed by the spring ⁇ C.
- the spring bears against the valve D below, and the compressing-nut c', above.
- This nut is hollow, for the passage of the upper end of the valve, and screws in the perforated head of a cylinder, E, which at its lower end screws on the valveshell, as shown in Fig. 2.
- the spring may be held and the spindle guided by a cross-head, adjustable on standards rising from the valve-shell, in the usual way.
- the boss in which the bearing b of the valve-spindle is formed has an upper face, c, which, when the valve is down, is covered by and in contact with said valve. From the upper face of the boss extend passages d,
- the sleeve is of cup shape, or has an upturned annular flange, which directs upward the escaping steam.
- valve arrangement described is advantageous in that I use but one valve for the two purposes of controllin g the main discharge and the auxiliary escape, the flat under face of the valve resting on and covering the upper face ofthe boss. This reduces the expense of manufacture, and simplifies the construction. I find, also, that the valve will, when thus arranged, open more readily.
- valve-shell valve, central boss, auxiliary steam-escape passages, and means for :increasing ⁇ or decreasing at pleasure the sizes of the outlet ends of said passages, 'under the arrangement and for operation as shown and set forth.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Safety Valves (AREA)
Description
Imaan/ll, .46am/w@ @fm/m? Patented feb.r23,1875.
GQ H. CROSBY.
Safety-Valve.
UNITED STATES PATENT @Errea GEORGE H. CROSBY, OF SOMERVILLE, MASSACHUSETTS.
IMPROVEMENT IN SAFETY-VALVES.
Specification forming part of Letters Patent No. 160,167, dated February 23, 1875; application filed February 2, 1875.
that at which the valve opened. This differential pressure is obtained by means of an auxiliary steam-discharge, opened for escape of steam by the lifting ofthe main valve, and
` provided with outlets adjustable in size with relation to the steam-inlet of said discharge. Such a valve is described and claimed in my Letters Patent dated January 26,1875, and my present invention is an improvement on said valve.
My improvements can best be explained and understood by reference to the accompanying drawing, in which- Figure l is a perspective view of a safetyvalve embodying my improvements. Fig. 2 is a vertical central section of the same. Fig. 8 is a perspective view of the shell and valveseat, uncovered.
A is the shell, of ordinary construction, except in the particulars hereinafter noted, formed at top with valve-seat a, and centerbearing b, for the valve-spindle B, which is compassed by the spring` C. The spring bears against the valve D below, and the compressing-nut c', above. This nut is hollow, for the passage of the upper end of the valve, and screws in the perforated head of a cylinder, E, which at its lower end screws on the valveshell, as shown in Fig. 2. In lieu of the cylinder E, the spring may be held and the spindle guided by a cross-head, adjustable on standards rising from the valve-shell, in the usual way. The boss in which the bearing b of the valve-spindle is formed has an upper face, c, which, when the valve is down, is covered by and in contact with said valve. From the upper face of the boss extend passages d,
through the supporting-arms e of said boss, and out through the shell A, as seen in Fig. 2. Steam entering these passages from the upper face of the boss will pass through said passages and out from the side of the shell. The size of the outlets in the side of the shell can `be controlled in various Ways; in this instance,
by an encompassing internally screw-threaded sleeve, F, engaging a screw-thread on the exterior of the shell. By the movement of this sleeve the outlets can be more or less closed, as desired. The sleeve is of cup shape, or has an upturned annular flange, which directs upward the escaping steam.
The boss, with its auxiliary steam discharge, answers to the supplemental chamber and its outlets described in my aforesaid Iletters Patent.
WVhen the valve -rests upon this boss, the steam-passages therein are closed, and the area of the valve upon which the initial pressure of steam exerts itself is reduced proportionately to the surface covered by the boss. When this initial pressure is sufcient to open the valve, the area of the valve exposed to the steam action is increased; but at the same time an additional and auxiliary steam-escape is also brought into play, and the difference in size between the outer and inner ends of the steam-passages constituting said escape, will determine the degree of differential pressure which Will be exerted on the valve, in addition to the pressure available to raise the valve in the irst instance.
The valve arrangement described is advantageous in that I use but one valve for the two purposes of controllin g the main discharge and the auxiliary escape, the flat under face of the valve resting on and covering the upper face ofthe boss. This reduces the expense of manufacture, and simplifies the construction. I find, also, that the valve will, when thus arranged, open more readily.
Having now described my invention, and the manner iu which the same is or may be carried into ei'ect, what I claim, and desire to secure by Letters Patent, is-V l. The boss for auxiliary steam-escape,i11 combination With the main valve, which, when in position on its seat, rests on top of, and in contact with, the upper face of said boss, and
4. The combination ofthe valve-shell, valve, central boss, auxiliary steam-escape passages, and means for :increasing` or decreasing at pleasure the sizes of the outlet ends of said passages, 'under the arrangement and for operation as shown and set forth.
In testimony whereof I have hereunto signed my name this 30th day of January, A. D. 1875.
G. H. CROSBY.
' VVlitnesses:
LYMAN B. MEsToN, SAML. W. CLIFFORD, Jr.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US160167A true US160167A (en) | 1875-02-23 |
Family
ID=2229577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US160167D Expired - Lifetime US160167A (en) | Improvement in safety-valves |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US160167A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140224337A1 (en) * | 2011-09-02 | 2014-08-14 | Aurotec Gmbh | Pipe comprising a pressure relief valve |
-
0
- US US160167D patent/US160167A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140224337A1 (en) * | 2011-09-02 | 2014-08-14 | Aurotec Gmbh | Pipe comprising a pressure relief valve |
| US9803763B2 (en) * | 2011-09-02 | 2017-10-31 | Aurotec Gmbh | Pipe comprising a pressure relief valve |
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