US451210A - James t - Google Patents

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US451210A
US451210A US451210DA US451210A US 451210 A US451210 A US 451210A US 451210D A US451210D A US 451210DA US 451210 A US451210 A US 451210A
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Prior art keywords
valve
steam
safety
casing
auxiliary
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    • 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
    • F16K17/08—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 special arrangements for providing a large discharge passage
    • F16K17/082—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 special arrangements for providing a large discharge passage with piston
    • 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
    • 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]
    • Y10T137/7838—Plural
    • Y10T137/7839—Dividing and recombining in a single flow path
    • 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
    • Y10T137/7935—Head slides on guide-rod concentric with spring

Definitions

  • the objectof my invention is to provide an ample area or opening for the escape of steam when the valve is open and to insure the prompt and certain closure of the valve when the steam-pressure has been sufficiently relieved, and to make the valve sufficiently sensitive to confine the fluctuations of steampressure to a comparatively small range.
  • the further object of my invention is to provide a valve-exit for the steam from the casing, so that the parts within the casing may be protected from dirt and consequent derangement.
  • Figure l is a vertical section of a valve constructed in accordance with my invention.
  • Fig. 2 is a similar section showing the valve open.
  • Fig. 3 is a plan View of the valve proper separated from its casing.
  • Fig. 4 isan inverted plan of the same.
  • A is the valve-casing,which, so far as the first part of myinvention is concerned, may be of any well-known form. It is, as shown herein, however, closed except upon one side, where an exit a, to which the escape-pipe may be screwed, is provided, as shown in Fig. 2, while in Fig. l the exit is provided with a flap or valve, hereinafter more valve-body,
  • the other condition is that the liftminutely described, which makes the casing tight when not open for the escaping steam.
  • valve-seat B of the ordinary form, to which is fitted a valve C.
  • Said valve C is held to its seat by a spindle D, upon which rests a spring E.
  • the tension of spring E is adjusted by the screw-cap F, attached to the upper part of the r and an outer casing or shield G, which is fitted over the screw-cap F and the upper portion of thevalve-casing, shelters the parts and is customarily locked in place, so that unauthorized tampering with the adj ustment of the valve is prevented.
  • the valve C is provided with an extended face outside of the beveled bearing portion of the valve-seat B, and the outer edge of this extended face is bounded by a depending lip C, which, when the valve is closed, slightly overlaps the valve-seat. From this extended face a series of perforations c extend to the upper face of the valve C, as shown in Figs.
  • auxiliary valve H Resting upon said upper face of main valve C is an imperforate auxiliary valve H, for which the main valve forms a seat. Said auxiliary valve H is so fitted upon the main valve C as to close the perforations 0 when it is down. It is held in contact with the valve C by a spring I, Which spring is compressed by a nut J upon the upper por tion of the spindle K, forminga part of or attached to the main valve C. Said nut J is held, when adjusted, by a pin L, which is dropped into the opening formed by a notch cut into the spindle K, and one of the series of notches Z cut into the nut J, which is brought to coincide with the first-named notch.
  • valve C and its auxil- 5 iary valve H are obvious from the foregoing description and a comparison of Figs. 1 and 2.
  • WVhen the steam-pressure rises beyond the point to which the valve is set, the latter is raised and the escaping steam, entering the orifices c, raises the auxiliary valve H, there being thus provided an additional outlet for the escape of the steam.
  • the use of the auxiliary valve is found to insure the prompt closure of the main valve upon a slight fall of the steam-pressure, whether the valve be set for a high or a low pressure, thus adapting a single valve to use under a widely-varying working p ressure,it desired.
  • a clack-valve M is shown hinged to one side of the exit of the valve-case. It is held in contact with the valve-case by a light spring m, which allows the valve to open under. a very small pressure, but keeps the valve M snugly closed when the safety-valve is closed.

Description

(No Model.)
J. T. HAYDEN.
SAFETY VALVE.
Patented Apr. 28, 1891.
Q N N R 1 m we A w o W I w i TATES ATENT Price.
THE CRANE COM- PANY, OF ILLINOIS.
SAFETY-VALVE.
SPECIFICATION forming part of Letters Patent No. 451,210, dated April 28, 1891. Application filed January 31, 1891. Serial No. 379,764. (No model.)
To a, whom it may concern.-
Be it known that I, JAMES T. HAYDEN, of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Safety-Valves, of which the following is a specification.
The objectof my inventionis to provide an ample area or opening for the escape of steam when the valve is open and to insure the prompt and certain closure of the valve when the steam-pressure has been sufficiently relieved, and to make the valve sufficiently sensitive to confine the fluctuations of steampressure to a comparatively small range.
In the operation of safety-valves there are two conflicting conditions to fulfill, one condition being that the escaping steam shall so act uponthe safety-valve when lifting as to insure a wide opening, so that the steam may escape as rapidlyas it is generated within the boiler. ing force of the steam shall not be so great as to prevent the seating of the valve when the pressure of steam within the boiler has been reduced to the desired Working pressure. In the presentinvention I have provided for the fulfillment of these two conditions by the use of an auxiliary disk or valve combined with the main Valve in a manner which will hereinafter be described.
The further object of my invention is to provide a valve-exit for the steam from the casing, so that the parts within the casing may be protected from dirt and consequent derangement.
In the accompanying drawings, Figure l is a vertical section of a valve constructed in accordance with my invention. Fig. 2 is a similar section showing the valve open. Fig. 3 is a plan View of the valve proper separated from its casing. Fig. 4 isan inverted plan of the same.
In the drawings, A is the valve-casing,which, so far as the first part of myinvention is concerned, may be of any well-known form. It is, as shown herein, however, closed except upon one side, where an exit a, to which the escape-pipe may be screwed, is provided, as shown in Fig. 2, while in Fig. l the exit is provided with a flap or valve, hereinafter more valve-body,
The other condition is that the liftminutely described, which makes the casing tight when not open for the escaping steam.
Within the casing is provided a valve-seat B, of the ordinary form, to which is fitted a valve C. Said valve C is held to its seat by a spindle D, upon which rests a spring E. The tension of spring E is adjusted by the screw-cap F, attached to the upper part of the r and an outer casing or shield G, which is fitted over the screw-cap F and the upper portion of thevalve-casing, shelters the parts and is customarily locked in place, so that unauthorized tampering with the adj ustment of the valve is prevented.
The devices for retaining and housing the valve just described are not claimed to be novel, and, so far as my present invention is concerned, may be modified indefinitely without departing from my invention, which relates especially to the portions hereinafter described.
The valve C is provided with an extended face outside of the beveled bearing portion of the valve-seat B, and the outer edge of this extended face is bounded by a depending lip C, which, when the valve is closed, slightly overlaps the valve-seat. From this extended face a series of perforations c extend to the upper face of the valve C, as shown in Figs.
1, 2, and 4:. Resting upon said upper face of main valve C is an imperforate auxiliary valve H, for which the main valve forms a seat. Said auxiliary valve H is so fitted upon the main valve C as to close the perforations 0 when it is down. It is held in contact with the valve C by a spring I, Which spring is compressed by a nut J upon the upper por tion of the spindle K, forminga part of or attached to the main valve C. Said nut J is held, when adjusted, by a pin L, which is dropped into the opening formed by a notch cut into the spindle K, and one of the series of notches Z cut into the nut J, which is brought to coincide with the first-named notch.
The operation of the valve C and its auxil- 5 iary valve H is obvious from the foregoing description and a comparison of Figs. 1 and 2. WVhen the steam-pressure rises beyond the point to which the valve is set, the latter is raised and the escaping steam, entering the orifices c, raises the auxiliary valve H, there being thus provided an additional outlet for the escape of the steam. The use of the auxiliary valve is found to insure the prompt closure of the main valve upon a slight fall of the steam-pressure, whether the valve be set for a high or a low pressure, thus adapting a single valve to use under a widely-varying working p ressure,it desired. The resistance of the valve to closure is diminished by the rise of the auxiliary disk, and there is available a greater force for opening the valve than subsequently exists to prevent its closu re. Its speedy and complete closure thus ensues after a comparatively small reduction of the steam-pressure.
In Fig. l a clack-valve M is shown hinged to one side of the exit of the valve-case. It is held in contact with the valve-case by a light spring m, which allows the valve to open under. a very small pressure, but keeps the valve M snugly closed when the safety-valve is closed.
Having fully described my invention, what I claim, and desire to secure by Letters Patent,
1. The combination, in a safety-valve, of a perforated main valve and an imperforate auxiliary valve seated upon the main valve, substantially as described.
2. The combination, in a safety-valve, of a main valve having an extended surface beyond the portion in contact with the valveseat and a lip surrounding said extended surface and overlapping the raised portion of the valve-seat, said main valve having perforations extending from the extended surface to the upper side of the valve, and an imperforate auxiliary valve seated upon said main valve, substantially as described.
3. The combination, in a safety-valve, of a valve-casing having its escape-orifice beyond the safety-valve proper provided with a valve which closes the valve-case tightly when the main valve is notin operation, substantially as described.
4. The combination, in main valve having an extended surface beyond the portion which makes contact with the valve-seat, and having perforations from said extended surface to the top of the valve, and an imperforate auxiliary valve adapted to close said orifices and to be raised by the escaping steam when the main valve is lifted, substantially as described.
JAMES T. HAYDEN.
Witnesses:
IRWIN VEEDER, 'Fonn MASON.
a safety-valve, of a-
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2727529A (en) * 1951-02-02 1955-12-20 Borg Warner Relief valve
US3039292A (en) * 1957-08-09 1962-06-19 Gen Dynamics Corp Apparatus for controlled release of pressurized fluid

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2727529A (en) * 1951-02-02 1955-12-20 Borg Warner Relief valve
US3039292A (en) * 1957-08-09 1962-06-19 Gen Dynamics Corp Apparatus for controlled release of pressurized fluid

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