US243070A - Milton - Google Patents

Milton Download PDF

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US243070A
US243070A US243070DA US243070A US 243070 A US243070 A US 243070A US 243070D A US243070D A US 243070DA US 243070 A US243070 A US 243070A
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Prior art keywords
valve
water
steam
milton
gage
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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
    • F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
    • F16K17/38—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature
    • F16K17/383—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature the valve comprising fusible, softening or meltable elements, e.g. used as link, blocking element, seal, closure plug
    • 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
    • Y10T137/1624—Destructible or deformable element controlled
    • Y10T137/1797—Heat destructible or fusible
    • Y10T137/1812—In fluid 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
    • Y10T137/8158—With indicator, register, recorder, alarm or inspection means
    • Y10T137/8342—Liquid level responsive indicator, recorder or alarm

Definitions

  • My invention consists in combining in a single appliance a low-water alarm provided with a fusible metal plug, and a gage-cock provided with doubleseated valve, the whole being constructed and arranged to operate as hereinafter described.
  • A is the valve-casing, which, with the neck-piece A', forms a chamber containing the valve-seats a and a';
  • B the valve, provided with two bearing-faces arranged in opposite directions, one being adapted to t into the seat a and the other into the seat a.
  • Said valve is also provided with the stem b, having a screw-thread, b', formed thereon that lits into a counterpart thread in the neck-piece A 5 C, a stuffing-box at the outer end ofthe neck-piece A for forming a steam-tightjoint around the stem b; D, a hand-wheel fixed on the outer end of the stem b for operating the valve B E, a vertical metallic tube secured to the top of the casing A, so as to form an open communication with the chamber of said casing. It is provided with a detachable head, F, containing a plug or disk, G, of fusible alloy that is compounded to melt at a temperature of about 2120 Fahrenheit.
  • valve B In attaching this device to a boiler itshould be placed on the line of the lowest water-level.
  • the valve B when drawn back against the seat a', permits the water to flow into and fill the chamber of the casing A and tube E, and so long as the water continues to fill these parts it will serve as a protection for the fusible plug G and prevent it from being melted, and while this condition is maintained the device may be used as an ordinary gage-cock lfor testing the height of water in the boiler.
  • the stem b To use it for that purpose the stem b must be turned to force the valve B clear from the seat a', when the water from the boiler will flow out through the opening in the nipple a2.
  • the tubeE will become empty by reason ofthe greater gravity of the water as against steam, and the device will then be opened for the iniiow of steam from the boiler.
  • the heat of the steam will melt the fusible plug G, thereby leaving the end of the tube open, permitting the steam to escape to give warning of the danger.
  • the valve Bv may then be closed against the seat a., as indicated by the dotted lines in the drawing, to stop the iiow of steam from the boiler until a new fusible plug is inserted to restore the device to a proper condition for performing its functions.
  • the tube E and head F By closing the valve B against the seat a the tube E and head F, or either of them, may be removed at any time for the purpose of making an examination into the condition of those parts.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Examining Or Testing Airtightness (AREA)

Description

(No Model.)
- M. O. JONES.
Combined Low Water Detector and Gage Cock.
110,243,070. I Patentedjune 21,1881.
mmmmm N. PETERS Plmlhomplwr. Washington. DC.
UNITED STATES PATENT OFFICE.
MILTON O. JONES, OF TROY, NEW YORK.
COMBINED LOW-WATER DETECTER AND GAGE-COCK.
SPECIFICATION forming part of Letters Patent No. 243,070, dated June 21, 1881. Application flied october 23, Isso. (No model.)
To all lwhom it may concern:
Be'itvknown that I, MILTON O. JONES, of Troy, in the county of Rensselaer and State of New York, have invented a new and useful Improvement in Combined Low-W'ater Alarms and Gage-Cocks for Steam-Boilers, of which the following is a specification.
My invention consists in combining in a single appliance a low-water alarm provided with a fusible metal plug, and a gage-cock provided with doubleseated valve, the whole being constructed and arranged to operate as hereinafter described.
The accompanying drawing, which forms a part of this specification, shows a vertical section of my invention through the center line thereof, and, as therein illustrated, A is the valve-casing, which, with the neck-piece A', forms a chamber containing the valve-seats a and a'; B, the valve, provided with two bearing-faces arranged in opposite directions, one being adapted to t into the seat a and the other into the seat a. Said valve is also provided with the stem b, having a screw-thread, b', formed thereon that lits into a counterpart thread in the neck-piece A 5 C, a stuffing-box at the outer end ofthe neck-piece A for forming a steam-tightjoint around the stem b; D, a hand-wheel fixed on the outer end of the stem b for operating the valve B E, a vertical metallic tube secured to the top of the casing A, so as to form an open communication with the chamber of said casing. It is provided with a detachable head, F, containing a plug or disk, G, of fusible alloy that is compounded to melt at a temperature of about 2120 Fahrenheit.
In attaching this device to a boiler itshould be placed on the line of the lowest water-level. The valve B, when drawn back against the seat a', permits the water to flow into and fill the chamber of the casing A and tube E, and so long as the water continues to fill these parts it will serve as a protection for the fusible plug G and prevent it from being melted, and while this condition is maintained the device may be used as an ordinary gage-cock lfor testing the height of water in the boiler. To use it for that purpose the stem b must be turned to force the valve B clear from the seat a', when the water from the boiler will flow out through the opening in the nipple a2. Should the water in the boiler fall below the low-water line, the tubeE will become empty by reason ofthe greater gravity of the water as against steam, and the device will then be opened for the iniiow of steam from the boiler. When this occurs the heat of the steam will melt the fusible plug G, thereby leaving the end of the tube open, permitting the steam to escape to give warning of the danger. The valve Bv may then be closed against the seat a., as indicated by the dotted lines in the drawing, to stop the iiow of steam from the boiler until a new fusible plug is inserted to restore the device to a proper condition for performing its functions.
By closing the valve B against the seat a the tube E and head F, or either of them, may be removed at any time for the purpose of making an examination into the condition of those parts. l
I claim as myinvcntion- A combined low-water alarm and gage-cock consisting of the valve casing A, provided with oppositeiy-arranged valve-seats a and a', the double-acting valve B, adapted to fit into said seats, so as to close one of them at a time, and afusible plug, G, connected to the metallic tube E, all constructed and arranged to operate as specified.
MILTON o. JoNEs.
Witnesses:
EDWIN G. DAY, WILLIAM H. Low.
US243070D Milton Expired - Lifetime US243070A (en)

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