US47076A - Improvement in fusible plugs for boilers - Google Patents
Improvement in fusible plugs for boilers Download PDFInfo
- Publication number
- US47076A US47076A US47076DA US47076A US 47076 A US47076 A US 47076A US 47076D A US47076D A US 47076DA US 47076 A US47076 A US 47076A
- Authority
- US
- United States
- Prior art keywords
- fusible
- plug
- boilers
- improvement
- plugs
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/42—Applications, arrangements or dispositions of alarm or automatic safety devices
- F22B37/47—Applications, arrangements or dispositions of alarm or automatic safety devices responsive to abnormal temperature, e.g. actuated by fusible plugs
- F22B37/475—Safety devices with fusible plugs
-
- 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
Definitions
- My invention consists of' improvements in fusible plugs made use of to prevent danger or injury to steam-boilers by deficiency of water.
- I form the body of the plug (which has usually been made in one piece screwed direct into the crown of the boiler-furnace) in two parts, so that the one part containing the plug may at any time be removed without disturbing the part which is screwed into the boiler.
- Figurel of the accompanying sheet of drawings is a vertical section of a fusible plug constructed according tomy invention.
- the plug is intended to be inserted from the flue or fire-box without the necessity of entering the boiler for the purpose.
- part of the plug a intended toube blown out, is in this instance united to the main body b of the plug by means of fusible metal run into a space, o, formed by turning a groove or recess in each of the parts a and b.
- the strength of the plug to resist pressure alone is further increased by diillingholes, as shown, through the two parts of the plug, so that the fusible metal may penetrate into and fill them.
- Fig. 2 is a modification of the foregoing, in which screw-threads are cut in each of the parts a and b, and the fusible metal run between thein ln this, as in the former case, the strength of the fusible metal to resist pressure is increased by drilling holes through the two parts, as shown.
- Fig. 3 represents a plug in which thc parts e and b are united, as in Fig. l, but which is formed with an additional part, d,intcnded to remain screwed into the boiler, and being of brass or gun-metal to facilitate the removal, when required, of thc parts united by the fusible metal.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pipe Accessories (AREA)
Description
Nrrn STATES ArnNr muon.
JOHN SMITH, OF WEN'IWORTH ROAD, ENGLAND.
Specification forming part of Letters Patent No. 7,076, dated March 28, 1865.
To all whom it may concern.-
Beit known that I, JOHN SMITH, of Edward Street, Wentworth Road, Bow Road, East, in the county of Middlesex, Kingdom of Great Britain, engineer, have invented certain new and useful Improvements in Fusible Plugs for Steam-Boilers; and I do hereby declare the following to be a full, clear, and exact descripticn of the same, reference being had to the accompanying sheet of drawings, and to the letters of reference marked thereon.
My invention consists of' improvements in fusible plugs made use of to prevent danger or injury to steam-boilers by deficiency of water. I form the body of the plug (which has usually been made in one piece screwed direct into the crown of the boiler-furnace) in two parts, so that the one part containing the plug may at any time be removed without disturbing the part which is screwed into the boiler. In some cases I make these plugs to be inserted or fixed entirely from the inside of the fire-box or flue without the necessity of entering the boiler for the purpose. I form that part of the plug which is intended to be blown out by the fusion of the soft holding metal and the hole in which it is placed in such manner as to present a greatly-increased resistance to the blowing out of the plug by pressure alone. I effect this either by cutting grooves or screw-threads in the hole and similar grooves or threads in or upon the blowout piece and running the fusible metal between, so that the whole depth of the fusible metal must be sheared for pressure alone to havethe effect referred to. Otherwise, instead of turning grooves in or screwin gthe two parts, as described, I form each of them with a recess so that the two, when placed together, will form a cavity in which the fusible metal may be run, and which will effect a similar object.
The following more full description will enable competent persons to .make and use my invention.
Figurel of the accompanying sheet of drawings is a vertical section of a fusible plug constructed according tomy invention. In this case the plug is intended to be inserted from the flue or fire-box without the necessity of entering the boiler for the purpose. rlhe part of the plug a, intended toube blown out, is in this instance united to the main body b of the plug by means of fusible metal run into a space, o, formed by turning a groove or recess in each of the parts a and b., The strength of the plug to resist pressure alone is further increased by diillingholes, as shown, through the two parts of the plug, so that the fusible metal may penetrate into and fill them.
Fig. 2 is a modification of the foregoing, in which screw-threads are cut in each of the parts a and b, and the fusible metal run between thein ln this, as in the former case, the strength of the fusible metal to resist pressure is increased by drilling holes through the two parts, as shown.
Fig. 3 represents a plug in which thc parts e and b are united, as in Fig. l, but which is formed with an additional part, d,intcnded to remain screwed into the boiler, and being of brass or gun-metal to facilitate the removal, when required, of thc parts united by the fusible metal.
Having now fully described and ascertained the nature of my said invention and the inanner in which the same may be performed, I would have it understood that, without limiting myself to the precise details represented, I cla-im as my invention and desire to secure by Letters Patent- 1. The construction of fusible plugs with recesses or grooves for the purpose of increasing the power of the fusible metal to resist shearing, substantially as described.
2. The construction of fusible plugs with an additional part which may remain screwed into or otherwise attached to the boiler, when the part containing the fusible metal is removed, as described.
In witness whereof' I have signed my name to this specification in the presence of two subscribing witnesses.
London, December 13, i864.
JOHN SMITH.
Vitnesses W. LLOYD Wiss,
Assoc. L. E., Chandos Ohamberc, Adelphi, London, IV. 0. GEORGE F. WARREN,
No. 17 Gracechtwch street, E. 0.,
London.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US47076A true US47076A (en) | 1865-03-28 |
Family
ID=2116632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US47076D Expired - Lifetime US47076A (en) | Improvement in fusible plugs for boilers |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US47076A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4744382A (en) * | 1987-04-29 | 1988-05-17 | Aluminum Company Of America | Combination thermal or pressure activated relief valve |
| US4800948A (en) * | 1987-04-29 | 1989-01-31 | Aluminum Company Of America | Method of forming a thermally activated pressure relief valve |
| US5791367A (en) * | 1996-01-25 | 1998-08-11 | Gas Research Institute | Pressure relief device |
| US20030015236A1 (en) * | 2001-07-19 | 2003-01-23 | Luxembourg Patent Company S.A. | Safety valve for pressurized fluid tanks |
| US20030221720A1 (en) * | 2002-04-23 | 2003-12-04 | Erick Girouard | Pressure relief device |
| US6814097B2 (en) | 2001-03-20 | 2004-11-09 | Teleflex Gfi Control Systems L.P. | Pressure relief device |
| DE102008031905A1 (en) * | 2008-07-08 | 2010-01-14 | Voith Patent Gmbh | Closure with thermal safety function for a hydrodynamic machine |
-
0
- US US47076D patent/US47076A/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4744382A (en) * | 1987-04-29 | 1988-05-17 | Aluminum Company Of America | Combination thermal or pressure activated relief valve |
| US4800948A (en) * | 1987-04-29 | 1989-01-31 | Aluminum Company Of America | Method of forming a thermally activated pressure relief valve |
| US5791367A (en) * | 1996-01-25 | 1998-08-11 | Gas Research Institute | Pressure relief device |
| US6814097B2 (en) | 2001-03-20 | 2004-11-09 | Teleflex Gfi Control Systems L.P. | Pressure relief device |
| US20030015236A1 (en) * | 2001-07-19 | 2003-01-23 | Luxembourg Patent Company S.A. | Safety valve for pressurized fluid tanks |
| US6776181B2 (en) * | 2001-07-19 | 2004-08-17 | Luxembourg Patent Company S.A. | Safety valve for pressurized fluid tanks |
| US20030221720A1 (en) * | 2002-04-23 | 2003-12-04 | Erick Girouard | Pressure relief device |
| US6851445B2 (en) | 2002-04-23 | 2005-02-08 | Teleflex Gfi Control Systems L.P. | Pressure relief device |
| DE102008031905A1 (en) * | 2008-07-08 | 2010-01-14 | Voith Patent Gmbh | Closure with thermal safety function for a hydrodynamic machine |
| US20110185718A1 (en) * | 2008-07-08 | 2011-08-04 | Harald Hoffeld | Closure with thermal safety function for a hydrodynamic machine |
| US8904775B2 (en) | 2008-07-08 | 2014-12-09 | Voith Patent Gmbh | Closure with thermal safety function for a hydrodynamic machine |
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