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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US
United States
Prior art keywords
fusible link
metal members
levers
opening
slot
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
US478155A
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English (en)
Inventor
Jr Earl M Goodsell
Theodore Vorkapich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Scott Technologies Inc
American La France Inc
Original Assignee
American La France Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
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/nl
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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Classifications

    • 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)
US478155A 1974-06-10 1974-06-10 Fusible link for fire sprinklers Expired - Lifetime US3866686A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US478155A US3866686A (en) 1974-06-10 1974-06-10 Fusible link for fire sprinklers
NL7500090A NL7500090A (nl) 1974-06-10 1975-01-06 Smeltbare schakel.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US478155A US3866686A (en) 1974-06-10 1974-06-10 Fusible link for fire sprinklers

Publications (1)

Publication Number Publication Date
US3866686A true US3866686A (en) 1975-02-18

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US478155A Expired - Lifetime US3866686A (en) 1974-06-10 1974-06-10 Fusible link for fire sprinklers

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US (1) US3866686A (nl)
NL (1) NL7500090A (nl)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2343490A1 (fr) * 1976-03-12 1977-10-07 Mather & Platt Ltd Dispositif de declenchement thermosensible destine a la commande mecanique d'appareils divers
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 (ko) * 1999-08-24 2002-03-09 최만형 스프링클러헤드
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 (fr) * 1976-03-12 1977-10-07 Mather & Platt Ltd Dispositif de declenchement thermosensible destine a la commande mecanique d'appareils divers
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 (ko) * 1999-08-24 2002-03-09 최만형 스프링클러헤드
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

Also Published As

Publication number Publication date
NL7500090A (nl) 1975-12-12

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AS Assignment

Owner name: FIGGIE INTERNATIONAL INC.

Free format text: CHANGE OF NAME;ASSIGNOR:A-T-O INC.;REEL/FRAME:003866/0442

Effective date: 19810623

STCF Information on status: patent grant

Free format text: PATENTED FILE - (OLD CASE ADDED FOR FILE TRACKING PURPOSES)

AS Assignment

Owner name: FIGGIE INTERNATIONAL INC.

Free format text: MERGER;ASSIGNOR:FIGGIE INTERNATIONAL INC., (MERGED INTO) FIGGIE INTERNATIONAL HOLDINGS INC. (CHANGED TO);REEL/FRAME:004767/0822

Effective date: 19870323