US217745A - Improvement in safety-valves - Google Patents

Improvement in safety-valves Download PDF

Info

Publication number
US217745A
US217745A US217745DA US217745A US 217745 A US217745 A US 217745A US 217745D A US217745D A US 217745DA US 217745 A US217745 A US 217745A
Authority
US
United States
Prior art keywords
valve
safety
valves
improvement
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
Application number
Publication date
Application granted granted Critical
Publication of US217745A publication Critical patent/US217745A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • 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
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7904—Reciprocating valves
    • Y10T137/7922—Spring biased
    • Y10T137/7929—Spring coaxial with valve
    • Y10T137/7932—Valve stem extends through fixed spring abutment

Definitions

  • Figure 1 is a vertical sectional elevation of the valve.
  • Fig. 2 is a cross-section on line or .r, Fig. 1.
  • Fig. 3 is a plan of the device.
  • Fig. 4 is an enlarged sectional view of the groove in the overhang of the valve.
  • the object of this invention is to provide a more simple and efl'ective pop-valve, for locomotive-engines and steam-boilers generally, than any of those now in use.
  • the invention consists in changing the form of valve in common use, so as to make it extremely sensitive to any variations in steampressure, and so that the escaping steam shall assist in closing as well as in opening the valve, and in inclosing it in a case provided with a set-screw and jam-nut, in order to adjust and secure the valve at will.
  • valve-seat B that is provided with an annular groove, a, of semicircular cross-section on its upper surface, and is beveled on the edge at b, that forms the seat for the valve G, which has a corresponding bevel on its under side, as shown.
  • the valve is also provided with an annular groove, 0', on its face; and our improvement consists, in part, in making this groove one-thirty-second of an inch, or thereabout, larger in diameter than the groove in the seat, and in enlarging the groove sidewise by cutting in toward the rim of the valve, so as to create an inwardly-curving lip, d, extending around it.
  • the pin D which is socketed in the valve, is provided with a fixed lower plate, f, and a movable upper one, 9', held between which and encircling the pin is the spiral spring E, for holding the valve down against the pressure of steam.
  • the set-screw F Through the top of the case is entered the set-screw F, over'the head of the pin and against the upper plate, so that by turning the set-screw the tension on the spring E is regulated, while the jam-nut G secures the setscrew, and hooks or wires passed through the holes h h in the head of the screw and the case prevent any tampering with the adjustment.
  • H H are lugs on the valve, for the convenience of grinding it to the valve-seat, and I I are guides for the spring.
  • this valve On an engine standing still and with a heavy fire, this valve will open and close every few seconds, sometimes merely making a putt of steam, so readily does it yield to any pressure in excess of that for which it is adjusted.
  • valve-seat B provided with an annulargroove
  • valve 0 provided with an undercut annular groove, 0', and inwardly-curving lip d
  • pin D provided with plates f and g, spiral spring E, setscrew F, provided with holes h h, and jam-nut G, constructed substantially as and for the purpose described.
  • valve 0 provided with an undercut groove, 0, which forms an inwardly-curving lip, d, substantially as herein shown and described.

Description

R. M. PRINGLE & W. D. ROBB'.
Safety-Valve.
No. 217,745. Patented July 22,1879.
TTORNEYS.
UNITED STATES, PATENT QFFIGE.
ROBERT M. PRINGLE AND WILLIAM D. ROBE, OF ELIZABETHTOWN, KY.
IMPROVEMENT IN SAFETY-VALVES.
Specification forming part of Letters Patent No. 217,745, dated July 22, 1879; application filed June 2, 1879.
To all whom it may concern:
Be it known that we, ROBERT M. PRINGLE and WILLIAM D. RoBB, of Elizabethtown, in the county of Hardin and State of Kentucky, have invented a new and Improved Safety- Valve, of which the following is a specification.
Figure 1 is a vertical sectional elevation of the valve. Fig. 2 is a cross-section on line or .r, Fig. 1. Fig. 3 is a plan of the device. Fig. 4 is an enlarged sectional view of the groove in the overhang of the valve.
Similar letters of reference indicate corresponding parts.
The object of this invention is to provide a more simple and efl'ective pop-valve, for locomotive-engines and steam-boilers generally, than any of those now in use.
The invention consists in changing the form of valve in common use, so as to make it extremely sensitive to any variations in steampressure, and so that the escaping steam shall assist in closing as well as in opening the valve, and in inclosing it in a case provided with a set-screw and jam-nut, in order to adjust and secure the valve at will.
In the drawings, Arepresents the case, into the bottom of which is screwed the valve-seat B, that is provided with an annular groove, a, of semicircular cross-section on its upper surface, and is beveled on the edge at b, that forms the seat for the valve G, which has a corresponding bevel on its under side, as shown. The valve is also provided with an annular groove, 0', on its face; and our improvement consists, in part, in making this groove one-thirty-second of an inch, or thereabout, larger in diameter than the groove in the seat, and in enlarging the groove sidewise by cutting in toward the rim of the valve, so as to create an inwardly-curving lip, d, extending around it.
The pin D, which is socketed in the valve, is provided with a fixed lower plate, f, and a movable upper one, 9', held between which and encircling the pin is the spiral spring E, for holding the valve down against the pressure of steam.
Through the top of the case is entered the set-screw F, over'the head of the pin and against the upper plate, so that by turning the set-screw the tension on the spring E is regulated, while the jam-nut G secures the setscrew, and hooks or wires passed through the holes h h in the head of the screw and the case prevent any tampering with the adjustment.
H H are lugs on the valve, for the convenience of grinding it to the valve-seat, and I I are guides for the spring.
When this device is attached to a boiler the steam under pressure lifts the valve against the power of the spring, and at the same time entering the undercut groove of the valve tends in escaping from it to draw the valve down again to its seat, and thus the valve is kept vibrating up and down, as it were, on a cushion of steam, which renders it extremely sensitive to any change of pressure within the boiler, and prevents it from being violently seated by the action of the spring when the excess of steam has escaped, and prevents it also from sticking to its seat and hanging fire in the manner common to all other popvalves with which we are acquainted.
On an engine standing still and with a heavy fire, this valve will open and close every few seconds, sometimes merely making a putt of steam, so readily does it yield to any pressure in excess of that for which it is adjusted.
We are aware that pop-valves have been constructed with corresponding annular grooves both in valve and valve-seat, hence do not broadly claim them but,
Having thus described our invention, we claim as new and desire to secure by Letters Patent 1. The within-described valve, consisting of case A, provided with holes h h, valve-seat B, provided with an annulargroove, a, valve 0, provided with an undercut annular groove, 0', and inwardly-curving lip d, pin D, provided with plates f and g, spiral spring E, setscrew F, provided with holes h h, and jam-nut G, constructed substantially as and for the purpose described.
2. The valve 0, provided with an undercut groove, 0, which forms an inwardly-curving lip, d, substantially as herein shown and described.
ROBERT MARION PRINGLE. WILLIAM DONALDSON ROBB.
Witnesses:
JAMES C. POSTON, LUKE G. HAYS.
US217745D Improvement in safety-valves Expired - Lifetime US217745A (en)

Publications (1)

Publication Number Publication Date
US217745A true US217745A (en) 1879-07-22

Family

ID=2287147

Family Applications (1)

Application Number Title Priority Date Filing Date
US217745D Expired - Lifetime US217745A (en) Improvement in safety-valves

Country Status (1)

Country Link
US (1) US217745A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2740425A (en) * 1951-06-20 1956-04-03 Frick Co High capacity, gas tight seating, adjustable safety valve
US3018792A (en) * 1959-02-16 1962-01-30 Delavan Mfg Company Dual orifice valve
US3080144A (en) * 1959-12-24 1963-03-05 Blaw Knox Co Anti-scoring valve
US4945941A (en) * 1990-03-05 1990-08-07 Vilter Manufacturing Corporation Means to reduce vibration in check valves and stop/check valves caused by pulsating low fluid flow
US20160018824A1 (en) * 2014-07-18 2016-01-21 Industrial Technology Research Institute Flow regulator
US20220099201A1 (en) * 2020-09-30 2022-03-31 Schrader-Bridgeport International, Inc. Adjustable valve core

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2740425A (en) * 1951-06-20 1956-04-03 Frick Co High capacity, gas tight seating, adjustable safety valve
US3018792A (en) * 1959-02-16 1962-01-30 Delavan Mfg Company Dual orifice valve
US3080144A (en) * 1959-12-24 1963-03-05 Blaw Knox Co Anti-scoring valve
US4945941A (en) * 1990-03-05 1990-08-07 Vilter Manufacturing Corporation Means to reduce vibration in check valves and stop/check valves caused by pulsating low fluid flow
US20160018824A1 (en) * 2014-07-18 2016-01-21 Industrial Technology Research Institute Flow regulator
US9671035B2 (en) * 2014-07-18 2017-06-06 Industrial Technology Research Institute Flow regulator
US20220099201A1 (en) * 2020-09-30 2022-03-31 Schrader-Bridgeport International, Inc. Adjustable valve core
US11415234B2 (en) * 2020-09-30 2022-08-16 Schrader-Bridgeport International, Inc. Adjustable valve core

Similar Documents

Publication Publication Date Title
US217745A (en) Improvement in safety-valves
US1976796A (en) Valve
US1585479A (en) Automatic valve structure
US308479A (en) Safety-valve
US158389A (en) Improvement in gas-regulators
US391472A (en) Safety-valve
US489515A (en) Reducing-pressure valve
USRE15568E (en) a cobpobation of vibginia
US156312A (en) Improvement in safety-valves
US1816431A (en) Gas regulator
US1152733A (en) Safety-valve.
US564812A (en) Safety-valve
US675513A (en) Safety-valve.
US1214445A (en) Reducing-valve.
US585084A (en) Safety-valve
US944330A (en) Steam safety-valve.
US524208A (en) kunkle
US447523A (en) Safety-valve
US1800463A (en) Relief valve
US496058A (en) Safety-valve
US549987A (en) Safety-valve
US451210A (en) James t
US2026793A (en) Pressure regulator
US446782A (en) John loftus
US611486A (en) Swab-valve