US3866686A - Fusible link for fire sprinklers - Google Patents

Fusible link for fire sprinklers Download PDF

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Publication number
US3866686A
US3866686A US478155A US47815574A US3866686A US 3866686 A US3866686 A US 3866686A US 478155 A US478155 A US 478155A US 47815574 A US47815574 A US 47815574A US 3866686 A US3866686 A US 3866686A
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Prior art keywords
fusible link
metal members
levers
opening
slot
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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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US478155A
Inventor
Jr Earl M Goodsell
Theodore Vorkapich
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Scott Technologies Inc
American La France Inc
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American La France Inc
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Application filed by American La France Inc filed Critical American La France Inc
Priority to US478155A priority Critical patent/US3866686A/en
Priority to NL7500090A priority patent/NL7500090A/en
Application granted granted Critical
Publication of US3866686A publication Critical patent/US3866686A/en
Assigned to FIGGIE INTERNATIONAL INC. reassignment FIGGIE INTERNATIONAL INC. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE JUNE 1, 1981. Assignors: A-T-O INC.
Assigned to FIGGIE INTERNATIONAL INC. reassignment FIGGIE INTERNATIONAL INC. MERGER (SEE DOCUMENT FOR DETAILS). EFFECTIVE DATE: DECEMBER 31, 1986 Assignors: FIGGIE INTERNATIONAL INC., (MERGED INTO) FIGGIE INTERNATIONAL HOLDINGS INC. (CHANGED TO)
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62C—FIRE-FIGHTING
    • A62C37/00—Control of fire-fighting equipment
    • A62C37/08—Control of fire-fighting equipment comprising an outlet device containing a sensor, or itself being the sensor, i.e. self-contained sprinklers
    • A62C37/10—Releasing means, e.g. electrically released
    • A62C37/11—Releasing means, e.g. electrically released heat-sensitive
    • A62C37/12—Releasing means, e.g. electrically released heat-sensitive with fusible links

Definitions

  • Prior structures of this type have generally employed two pieces of metal soldered to one another, each of which is provided with an opening and the openings arranged in spaced relation so as to receive projecting levers of the sprinkler. See for example U.S. Pat. Nos. 1,317,629, 1,145,883 and 3,061,016.
  • This invention provides a compact fusible link with a common center opening and a configuration insuring a desirable separation upon fusing of the fusible material of the link.
  • a fusible link for a sprinkler in a fire extinguishing sprinkler system is disclosed which is formed of a pair of metal discs, each of which are provided with oppositely disposed slots and registering raised areas.
  • each of the oppositely disposed slots register to form a central opening in the discs when the same are assembled and soldered to one another.
  • Cold flow of the fusible link is avoided by the mechanical inter-engagement of the raised areas which are so formed as to require the physical separation of the metal discs when the fusible link reaches fusing temperature and thereby insures the positive separation of the link and the freedom of the levers which control the sprinkler.
  • FIG. 1 is a vertical section through a sprinkler showing the fusible link in lever retaining position.
  • FIG. 2 is a section similar to FIG. 1 showing the fusible link immediately following fusion therein.
  • FIG. 3 is a perspective view of a sprinkler with parts broken away and parts in cross section showing the fusible link completely separated permitting operation of the sprinkler.
  • FIG. 4 is an exploded top plan view showing the two metaldiscs of the fusible link.
  • FIG. 5 is an enlarged top plan view of one of the discs seen in FIG. 4.
  • FIG. 6 is a section on line 66 of FIG. 5, and
  • FIG. 7 is an exploded top plan view of a pair of metal discs of modified form of fusible link.
  • the fusible link comprises a pair of identical metal discs 10 each of which has a slot 11 extending into the body of the disc to a point past the center thereof and each of which has a pair of rounded raised areas 12 formed therein together with a plurality of flat raised sections 13.
  • Two of the metal discs 10 are assembled in superimposed relation as seen in FIG. 1 of the drawings with one set of the flat raised sections 13 slightly spacing the discs to permit the same to be readily soldered to one another with a suitable fusible solder.
  • the rounded raised areas 12 nest one within the other and prevent the discs 10 from being moved sidewardly relative to one another until and unless the solder holding the same in face to face engagement fuses as will be understood by those skilled in the art.
  • the fusible link described herein is installed in a sprinkler such as seen in FIGS. 1, 2 and 3 of the drawings, the discharge orifice of the sprinkler is closed with a cap 14 and held in closed position by a pair of levers 15 and 16 portions of the levers l5 and 16 being positioned through the center opening in the fusible link as formed by the registering inner ends of the slots 11 therein as seen in FIG. 1 of the drawings.
  • the sprinkler in which the fusible link of the invention is seen installed in FIG. 1 of the drawing includes a threaded base 17, a frame 18 and a deflector 19 all as in a conventional sprinkler and the cap 14 closes the discharge orifice which extends vertically through the base 17 as will be understood by those skilled in the art.
  • FIGS. 5 and 6 of the drawings greatly enlarged detailed views of one of the discs 10 may be seen and it will be observed in FIG. 6 in particular that the flat raised sections 13 are very small in relation to the dimensions of the round raised areas 12.
  • the flat raised sections 13 are preferably formed in the metal of the discs 10 by making dies having the appropriate configurations therein to both punch out slots 11, form the round raised areas 112 and create the flat raised sections 13 simultaneously as willoccur to those skilled in the art.
  • the preferred shape of the round raised areas 12 is almost a half sphere as may be seen in FIG. 6 of the drawings, and the radius of the inner surface of the round raised areas 12 is the same as the radius of the exterior surface thereof so that the same will nest one within the other as hereinbefore described. This results in a thinning of the metal at the edges of the round raised areas 12 as compared with the thickness of the metal in their outermost portions.
  • FIG. 7 of the drawings wherein the length of the slot has been shortened and round apertures formed in oppositely disposed relation thereto.
  • a pair of discs 20 are each provided with a pair of round raised areas 21 and a plurality of flat raised sections 22 and each of the discs 20 has a short slot 23 with a rounded inner end 24.
  • Aperture-s 25 are formed in the discs 20 in oppositely disposed relation to the slots 23 and so positioned that when the: pair of discs 20 are placed in superimposed relation and soldered to one another, the resulting composite fusible link has a pair of spaced openings therethrough, each of the openings being defined by one of the apertures 25 and the inner end of the slots 24 in the adjacent disc.
  • the modification of FIG. 7 can therefore be used with sprinklers having levers projecting to one side of the frame and wherein the ends of the levers are spaced vertically with respect to one another and are thus capable of being received by the dual apertures in the modified form of the fusible link.
  • the fusible link of the modification operates in the same manner as the fusible link of the preferred form of the invention hereinbefore described.
  • a fusible link for a fire sprinkler which may be quickly and inexpensively formed and assembled from two shaped metal discs and that it provides a central aperture for the reception of levers in a sprinkler, at least one of which is positioned on the axial center line of the discharge orifice of the sprinkler.
  • a fusible link comprising a pair of metal members positioned in superimposed relation and soldered to one another, each of the metal members having projecting registering configurations arranged to prevent the metal members from sliding sidewardly with respect to one another and each of the metal members having a slot formed therein from one side thereof, the respective positioning of the metal members being reversed in assembly so that the slot in one of said members extends to one side and the slot in the other of the metal members extends toward the opposite side of the fusible link and so that the inner ends of the slots register and form an opening through said metal members.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Fire-Extinguishing By Fire Departments, And Fire-Extinguishing Equipment And Control Thereof (AREA)

Abstract

A fusible link holds levers positioning a cap on an orifice in a fire sprinkler and is so formed that upon fusing the separation of the parts of the fusible link insures the freeing of the levers and the opening of the sprinkler.

Description

[ Feb. 18, 1975 United States Patent [191 Good'sell, Jr. et al.
2 MM 9 M6 .1 6. m L WM .0, u 0 n O u" I m m m n M w 3 m M H o RM 67 56 r 99 M 11 .l m 07 E O y W 000 34 .m N 23 P.
Pr m l m E a RSk mo F M m m md n K h m m m m ETb m mm UV F..m 4 M U Assistant ExaminerMichael Mar Attorney, Agent, or Firm-Webster B. Harpman ABSTRACT [21] Appl. No.: 478,155
A fusible link holds levers positioning a cap on an orifice in a fire sprinkler and is so formed that upon fus- 22 41 97 63 n. 6 BA 9. 6" u Snt Um NH 55 [58] Field of Search.............. 169/37, 38, 40, 42, 39
References Cited UNITED STATES PATENTS ing the separation of the parts of the fusible link insures the freeing of the levers and the opening of the sprinkler.
1,209,574 169/42 6 Claims, 7 Drawing Figures PATENT FEB 1 8 ms SHEET 2 OF 2 FIG.3
1 FUSIBLE LINK FOR FIRE SPRINKLERS BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to fusible links as employed in sprinklers in fire extinguishing sprinkler systems.
2. Description of the Prior Art Prior structures of this type have generally employed two pieces of metal soldered to one another, each of which is provided with an opening and the openings arranged in spaced relation so as to receive projecting levers of the sprinkler. See for example U.S. Pat. Nos. 1,317,629, 1,145,883 and 3,061,016.
This invention provides a compact fusible link with a common center opening and a configuration insuring a desirable separation upon fusing of the fusible material of the link.
SUMMARY OF THE INVENTION A fusible link for a sprinkler in a fire extinguishing sprinkler system is disclosed which is formed of a pair of metal discs, each of which are provided with oppositely disposed slots and registering raised areas. The
inner ends of each of the oppositely disposed slots register to form a central opening in the discs when the same are assembled and soldered to one another. Cold flow of the fusible link is avoided by the mechanical inter-engagement of the raised areas which are so formed as to require the physical separation of the metal discs when the fusible link reaches fusing temperature and thereby insures the positive separation of the link and the freedom of the levers which control the sprinkler.
DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical section through a sprinkler showing the fusible link in lever retaining position.
FIG. 2 is a section similar to FIG. 1 showing the fusible link immediately following fusion therein.
FIG. 3 is a perspective view of a sprinkler with parts broken away and parts in cross section showing the fusible link completely separated permitting operation of the sprinkler.
FIG. 4 is an exploded top plan view showing the two metaldiscs of the fusible link.
FIG. 5 is an enlarged top plan view of one of the discs seen in FIG. 4.
FIG. 6 is a section on line 66 of FIG. 5, and
FIG. 7 is an exploded top plan view of a pair of metal discs of modified form of fusible link.
DESCRIPTION OF THE PREFERRED EMBODIMENT In the form of the invention chosen for illustration and description herein the fusible link comprises a pair of identical metal discs 10 each of which has a slot 11 extending into the body of the disc to a point past the center thereof and each of which has a pair of rounded raised areas 12 formed therein together with a plurality of flat raised sections 13.
Two of the metal discs 10 are assembled in superimposed relation as seen in FIG. 1 of the drawings with one set of the flat raised sections 13 slightly spacing the discs to permit the same to be readily soldered to one another with a suitable fusible solder. In assembled and solded relation as seen in FIG. 1 of the drawings, the rounded raised areas 12 nest one within the other and prevent the discs 10 from being moved sidewardly relative to one another until and unless the solder holding the same in face to face engagement fuses as will be understood by those skilled in the art.
At such time as the solder fuses the discs 10 must move apart from one another as they attempt to slide with respect to one another and as illustrated in FIG. 2 of those drawings. Those skilled in the art will observe that when the fusible link described herein is installed in a sprinkler such as seen in FIGS. 1, 2 and 3 of the drawings, the discharge orifice of the sprinkler is closed with a cap 14 and held in closed position by a pair of levers 15 and 16 portions of the levers l5 and 16 being positioned through the center opening in the fusible link as formed by the registering inner ends of the slots 11 therein as seen in FIG. 1 of the drawings. The sprinkler in which the fusible link of the invention is seen installed in FIG. 1 of the drawing includes a threaded base 17, a frame 18 and a deflector 19 all as in a conventional sprinkler and the cap 14 closes the discharge orifice which extends vertically through the base 17 as will be understood by those skilled in the art.
By referring now to FIG. 3 of the drawings, the complete separation of the discs 10 of the fusible link may be seen and it will be observed that one end of the lever 16 is still engaged in the innermost end of the slot 11 in one of the discs and that the tension and resilience of the levers 15 and 16 of the sprinkler has resulted in the parts of the fusible link and the levers moving clear of the center axial portion of the sprinkler to insure the release of the cap 14 and the opening of the sprinkler to permit the flow of fire extinguishing fluid therethrough.
By referring now to FIGS. 5 and 6 of the drawings, greatly enlarged detailed views of one of the discs 10 may be seen and it will be observed in FIG. 6 in particular that the flat raised sections 13 are very small in relation to the dimensions of the round raised areas 12. The flat raised sections 13 are preferably formed in the metal of the discs 10 by making dies having the appropriate configurations therein to both punch out slots 11, form the round raised areas 112 and create the flat raised sections 13 simultaneously as willoccur to those skilled in the art. The preferred shape of the round raised areas 12 is almost a half sphere as may be seen in FIG. 6 of the drawings, and the radius of the inner surface of the round raised areas 12 is the same as the radius of the exterior surface thereof so that the same will nest one within the other as hereinbefore described. This results in a thinning of the metal at the edges of the round raised areas 12 as compared with the thickness of the metal in their outermost portions.
Modifications in the structure of the fusible link disclosed herein may be made without departing from the advantages of the same and one such modification is illustrated in FIG. 7 of the drawings wherein the length of the slot has been shortened and round apertures formed in oppositely disposed relation thereto. In FIG. 7 a pair of discs 20 are each provided with a pair of round raised areas 21 and a plurality of flat raised sections 22 and each of the discs 20 has a short slot 23 with a rounded inner end 24. Aperture-s 25 are formed in the discs 20 in oppositely disposed relation to the slots 23 and so positioned that when the: pair of discs 20 are placed in superimposed relation and soldered to one another, the resulting composite fusible link has a pair of spaced openings therethrough, each of the openings being defined by one of the apertures 25 and the inner end of the slots 24 in the adjacent disc. The modification of FIG. 7 can therefore be used with sprinklers having levers projecting to one side of the frame and wherein the ends of the levers are spaced vertically with respect to one another and are thus capable of being received by the dual apertures in the modified form of the fusible link. In operation the fusible link of the modification operates in the same manner as the fusible link of the preferred form of the invention hereinbefore described.
It will thus be seen that a fusible link for a fire sprinkler has been disclosed which may be quickly and inexpensively formed and assembled from two shaped metal discs and that it provides a central aperture for the reception of levers in a sprinkler, at least one of which is positioned on the axial center line of the discharge orifice of the sprinkler.
Although but two embodiments of the present invention have been illustrated and described, it will be apparent to those skilled in the art that various changes and modifications may be made therein without departing from the spirit of the invention.
We claim:
1. A fusible link comprising a pair of metal members positioned in superimposed relation and soldered to one another, each of the metal members having projecting registering configurations arranged to prevent the metal members from sliding sidewardly with respect to one another and each of the metal members having a slot formed therein from one side thereof, the respective positioning of the metal members being reversed in assembly so that the slot in one of said members extends to one side and the slot in the other of the metal members extends toward the opposite side of the fusible link and so that the inner ends of the slots register and form an opening through said metal members.
2. The fusible link of claim 1 and wherein said metal members are round and the opening therethrough is in the center thereof.
3. The fusible link of claim 1 and wherein said configurations are rounded raised shapes.
4. The fusible link of claim 1 and wherein said configurations are rounded raised shapes and wherein the inner and outer surfaces thereof are of the same radius.
5. The fusible link of claim 1 and wherein raised sections are formed on said members and arranged to closely space the same and provide space for solder.
6. The combination of a sprinkler having a discharge orifice on the axial center line thereof and a frame thereover and levers holding a cap on said orifice, at least one of said levers disposed between said frame and cap on said axial center line and a fusible link consisting of two metal members soldered to one another in superimposed relation, each of the metal members having projecting registering configurations and a slot inwardly from one side thereof extending beyond the center thereof, the slots being in oppositely disposed relation in said link with the inner ends thereof in registry and forming an opening on said axial center line, said levers having portions positioned in said opening so as to be restrained by said fusible link.

Claims (6)

1. A fusible link comprising a pair of metal members positioned in superimposed relation and soldered to one another, each of the metal members having projecting registering configurations arranged to prevent the metal members from sliding sidewardly with respect to one another and each of the metal members having a slot formed therein from one side thereof, the respective positioning of the metal members being reversed in assembly so that the slot in one of said members extends to one side and the slot in the other of the metal members extends toward the opposite side of the fusible link and so that the inner ends of the slots register and form an opening through said metal members.
2. The fusible link of claim 1 and wherein said metal members are round and the opening therethrough is in the center thereof.
3. The fusible link of claim 1 and wherein said configurations are rounded raised shapes.
4. The fusible link of claim 1 and wherein said configurations are rounded raised shapes and wherein the inner and outer surfaces thereof are of the same radius.
5. The fusible link of claim 1 and wherein raised sections are formed on said members and arranged to closely space the same and provide space for solder.
6. The combination of a sprinkler having a discharge orifice on the axial center line thereof and a frame thereover and levers holding a cap on said orifice, at least one of said levers disposed between said frame and cap on said axial center line and a fusible link consisting of two metal members soldered to one another in superimposed relation, each of the metal members having projecting registering configurations and a slot inwardly from one side thereof extending beyond the center thereof, the slots being in oppositely disposed relation in said link with the inner ends thereof in registry and forming an opening on said axial center line, said levers having portions positioned in said opening so as to be restrained by said fusible link.
US478155A 1974-06-10 1974-06-10 Fusible link for fire sprinklers Expired - Lifetime US3866686A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2343490A1 (en) * 1976-03-12 1977-10-07 Mather & Platt Ltd THERMOSENSITIVE RELEASE DEVICE INTENDED FOR THE MECHANICAL CONTROL OF VARIOUS EQUIPMENT
US4715447A (en) * 1985-05-10 1987-12-29 Johnson Kimball W Quick response automatic fire sprinkler head
US4757865A (en) * 1986-11-19 1988-07-19 Star Sprinkler Corporation Fast response sprinkler head
EP0331423A2 (en) * 1988-03-01 1989-09-06 Grinnell Corporation Heat-responsive element for fire protection sprinklers or the like
US4991639A (en) * 1989-12-06 1991-02-12 Whiting Roll-Up Door Mfg. Corp. Guard members for preventing shifting cargo from intefering with the operation of a roll-up door
US5120152A (en) * 1990-06-25 1992-06-09 Carmen Gueli Fusible link
US5686878A (en) * 1995-04-03 1997-11-11 Gueli; Carmen Temperature sensitive fusible link assembly having cooperating projections and slots
KR100327670B1 (en) * 1999-08-24 2002-03-09 최만형 A head of sprinkler
US6585054B1 (en) * 1999-05-28 2003-07-01 The Viking Corporation Fast response sprinkler head and fire extinguishing system
US20050178564A1 (en) * 2004-02-12 2005-08-18 Orr Shawn G. Fast response sprinkler assembly for a fire extinguishing system
US20070221389A1 (en) * 2006-03-21 2007-09-27 Victaulic Company Sprinkler with motion limited lever
USD667079S1 (en) * 2011-10-19 2012-09-11 The Reliable Automatic Sprinkler Co., Inc. Soldered mini-link mechanism

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1209574A (en) * 1916-07-05 1916-12-19 Lester A Grimes Link for sprinkler-heads.
US2730900A (en) * 1953-02-10 1956-01-17 Globe Automatic Sprinkler Co Load supporting thermosensitive linkage
US3348617A (en) * 1965-09-13 1967-10-24 Fyr Fyter Co Fusible link

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1209574A (en) * 1916-07-05 1916-12-19 Lester A Grimes Link for sprinkler-heads.
US2730900A (en) * 1953-02-10 1956-01-17 Globe Automatic Sprinkler Co Load supporting thermosensitive linkage
US3348617A (en) * 1965-09-13 1967-10-24 Fyr Fyter Co Fusible link

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2343490A1 (en) * 1976-03-12 1977-10-07 Mather & Platt Ltd THERMOSENSITIVE RELEASE DEVICE INTENDED FOR THE MECHANICAL CONTROL OF VARIOUS EQUIPMENT
US4715447A (en) * 1985-05-10 1987-12-29 Johnson Kimball W Quick response automatic fire sprinkler head
US4757865A (en) * 1986-11-19 1988-07-19 Star Sprinkler Corporation Fast response sprinkler head
EP0331423A2 (en) * 1988-03-01 1989-09-06 Grinnell Corporation Heat-responsive element for fire protection sprinklers or the like
EP0331423A3 (en) * 1988-03-01 1990-03-28 Grinnell Corporation Heat-responsive element for fire protection sprinklers or the like
US4991639A (en) * 1989-12-06 1991-02-12 Whiting Roll-Up Door Mfg. Corp. Guard members for preventing shifting cargo from intefering with the operation of a roll-up door
US5120152A (en) * 1990-06-25 1992-06-09 Carmen Gueli Fusible link
US5686878A (en) * 1995-04-03 1997-11-11 Gueli; Carmen Temperature sensitive fusible link assembly having cooperating projections and slots
US7036603B2 (en) * 1999-05-28 2006-05-02 The Viking Corporation Fast response sprinkler head and fire extinguishing system
US6585054B1 (en) * 1999-05-28 2003-07-01 The Viking Corporation Fast response sprinkler head and fire extinguishing system
US20030201105A1 (en) * 1999-05-28 2003-10-30 Viking Corporation Fast response sprinkler head and fire extinguishing system
US7290618B2 (en) 1999-05-28 2007-11-06 The Viking Corporation Fast response sprinkler head and fire extinguishing system
KR100327670B1 (en) * 1999-08-24 2002-03-09 최만형 A head of sprinkler
US20050178564A1 (en) * 2004-02-12 2005-08-18 Orr Shawn G. Fast response sprinkler assembly for a fire extinguishing system
US7314093B2 (en) 2004-02-12 2008-01-01 The Viking Corporation Fast response sprinkler assembly for a fire extinguishing system
US20070221389A1 (en) * 2006-03-21 2007-09-27 Victaulic Company Sprinkler with motion limited lever
US7584803B2 (en) * 2006-03-21 2009-09-08 Victaulic Company Sprinkler with motion limited lever
USD667079S1 (en) * 2011-10-19 2012-09-11 The Reliable Automatic Sprinkler Co., Inc. Soldered mini-link mechanism

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