US3812914A - Automatic on-off sprinkler - Google Patents

Automatic on-off sprinkler Download PDF

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Publication number
US3812914A
US3812914A US00385130A US38513073A US3812914A US 3812914 A US3812914 A US 3812914A US 00385130 A US00385130 A US 00385130A US 38513073 A US38513073 A US 38513073A US 3812914 A US3812914 A US 3812914A
Authority
US
United States
Prior art keywords
control chamber
piston
fluid
fluid inlet
bore
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
US00385130A
Other languages
English (en)
Inventor
J Mears
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.)
TDK Micronas GmbH
ITT Inc
Original Assignee
Deutsche ITT Industries GmbH
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
Priority to US00385130A priority Critical patent/US3812914A/en
Application filed by Deutsche ITT Industries GmbH filed Critical Deutsche ITT Industries GmbH
Publication of US3812914A publication Critical patent/US3812914A/en
Application granted granted Critical
Priority to AU71278/74A priority patent/AU486109B2/en
Priority to NO742599A priority patent/NO141782C/no
Priority to DE2434721A priority patent/DE2434721A1/de
Priority to GB3207974A priority patent/GB1472569A/en
Priority to NL7410034A priority patent/NL7410034A/xx
Priority to IT25708/74A priority patent/IT1017708B/it
Priority to LU70641A priority patent/LU70641A1/xx
Priority to DK407874A priority patent/DK407874A/da
Priority to SE7409841A priority patent/SE389273B/xx
Priority to BE2053790A priority patent/BE818414A/xx
Priority to FR7426885A priority patent/FR2239261B1/fr
Priority to JP49088165A priority patent/JPS5043796A/ja
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

Definitions

  • An automatic water sprinkler has a cylindrical control chamber formed in a body portion and a line pressure operated piston valve slideably and sealingly disposed therein for closing a downstream end of a fluid inlet member.
  • a centrally positioned tubular guide member is mounted to the piston and inserted into a bore formed in said body portion for guiding the piston in the control chamber during reciprocation.
  • a passage is centrally formed in said piston for communicating the inlet member with the control chamber through the tubular guide and bore so that the control chamber is exposed to the inlet fluid pressure.
  • the effective area of the piston exposed to the control chamber fluid pressure is greater than that exposed to the inlet member fluid pressure to thereby establish a differential force for closing the piston valve.
  • a ball is disposed in the bore and adapted to rest on an end of the tubular member for closing the tubular guide member and forming a'unidirectional check valve to prevent sprinkler operation as a result of fluctuating inlet fluid pressure.
  • a heat responsive member usually formed of a fuseable material held a plug in position to prevent the flow of water from the sprinkler head.
  • the heat responsive member was subjected to temperatures above a predetermined level, the fuseable material melted allowing the plug to open so that fire extinguishing fluid escaped.
  • the valve remained open and water continued to be released even after the fire was extinguished.
  • the water supply to the sprinkler system had to be manually shut off at centrally located water supply line. The result in many cases was that greater loses were inflicted by the water than by the fire itself, especially at times when the sprinkler operation was not discovered for a relative long period after the fire had been extinguished.
  • the automatic devices all use line pressure operated differential area piston valves to control the flow of fluid from the sprinklers.
  • the line pressure operated differential area piston valves of these devices are slideably mounted within control chambers and fluid passages are provided within the piston valves for communicating line pressure to the control chambers so that the differential area piston valves are forced into a position to shut off fluid flow.
  • U.S. Pat. No. 3,702,160 discloses the use of a check valve to maintain the maximum pressure within the control chamber.
  • the check valve consisted of a flap of resilient material having a large contact area covering an opening in a partition. This form of check valve could not be readily adapted to other types of sprinklers.
  • the flap type check valve also had a tendency to stick especially if oil was present on the surface of the check valve. This sticking would have a tendency to prevent the valve from opening especially under the low pressure exerted thereon when the main sprinkler valve was open. As a result the automatic shut off provision could become inoperative if the valve stuck in a closed position.
  • the present invention provides 'an improved ON- OFF sprinkler that is uneffected by surges in the fluid supply line.
  • the sprinkler utilizes a line pressure operated piston valve slideably and sealingly disposed within a control chamber for closing a downstream end of a fluid inlet member which is adapted for connection to a fluid supply source.
  • a fluid passage is formed through the center of the piston valve to communicate the supply line pressure to the control chamber.
  • a centrally located tubular guide member is used for aligning the piston within the control chamber. The unique use of a centrally located tubular guide member allows the fluid passage to be centrally located so that the maxi mum line pressure is transmitted to the control chamber especially when the piston valve is open.
  • the tubular guide member has an end inserted in a bore formed axially with the control chamber.
  • the structure is particularly adaptable to the use of a ball type check valve disposed in the bore to close oneend of the,tu'btilar member for maintaining the line pressure in the control chamber and to prevent reverse fluid flow.
  • a single centrally located guide is the simplest and least expensive form of guide member. Since the guide is tubular it allows for the central location of a passage through the piston valve. The centrally located passage assures the transmittal of maximum line pressure to the control chamber when the piston valve is open. An ofl centered passage would not receive the full force of the discharged fluid and maximum pressure would not be transmitted to the control chamber.
  • the ball type check valve is easily disposed in the bore so as to rest on the end of the tubular guide. The ball is not subject to sticking and provides a reliable check valve.
  • Another objective of the present invention is to provide a simplified guide member that provides for the central location of a fluid passage to the control chamber.
  • a stainless steel ball 62 is disposed within bore 32 and rests on the end of the tubular guide member 50 to form a unidirectional check valve and to prevent reverse flow of fire extinguishing fluid through the tubular guide member.
  • the bimetallic disc is cupped and is designed to move with a snap action toward a reverse cup shape at a predetermined temperature, for example 185 F, and when in the reverse shape to return towards the original shape at a second lower temperature for example 100 F. Further, the bimetallic disc is positioned with its convex surface facing the pilot valve and is urged against the valve to resiliently bias the valve toward its closed position.
  • the fluid used is usually water, it is preferred that all the components be non-ferrous or stainless steel. While brass and bronze are preferred, other materials could also be used.
  • the effective area of the piston 36 exposed to the pressure within the control chamber is greater than the area of the valve means 44 exposed to the pressure within the fluid inlet member so that when the pressure within the control chamber equals the pressure within the fluid inlet member a differential force is established which holds the valve 44 in a closed position.
  • the bimetallic disc snaps to its original position thereby closing the outlet port 70 and allowing pressure to build up within the control chamber 30.
  • the fluid discharging against the valve means 44 partially flows through passage 56 and increases the pressure within the control chamber 30 until it equals the fluid inlet pressure at which time the force produced by the pressure within chamber 30 will be sufficient to force the piston valve to the closed posi- 6 tion thereby stopping the discharge of fire extinguishing fluid.
  • a water sprinkler for a fire protection sprinkler system comprising:
  • a body member including a fluid inlet means adapted for coupling to a source of pressurized fluid
  • piston means slideably and sealingly disposed in said control chamber
  • valve means associated with the piston'means for opening and closing the fluid inlet means in response to the position of said piston means in the control chamber;
  • tubular guide member mounted axially in said piston and having an end extending partially into the cylindrical bore for guiding the piston during reciprocation in the control chamber,-said tubular guide member loosely fitting in said bore;
  • a ball type check valve means disposed in the conduit for preventing fluid flow from the control chamber to the fluid inlet means while allowing pressurized fluid to flow into the control chamber;
  • a fluid inlet member having a downstream end and an upstream end adapted for coupling to a source of pressurized fluid
  • said cylindrical control chamber formed in the upper body portion and having an open end facing said downstream end and spaced therefrom.
  • valve means is formed integrally with the piston means and engages a valve seating surface about the downstream end of the fluid inlet member.
  • a fluid inlet member having an upstream end adapted for coupling to a source of pressurized fluid and a downstream end;
  • a body member supported by said open frame in spaced relationship to said downstream end, said body member having a cylindrical control chamber formed therein in axial alignment with the fluid inlet member and having an open end facing said downstream end and spaced therefrom;
  • valve means for opening and closing the downstream end of the fluid inlet member in response to the position of said piston in the control chamber
  • tubular guide member mounted axially in said piston and having an end extending partially into the cylindrical bore for guiding the piston during reciprocation in the control chamber, said tubular guide member loosely fitting in said bore;
  • a ball disposed in the bore and adapted to rest on the end of the tubular member extending into the bore for preventing fluid flow from the control chamber to the inlet member while allowing pressurized fluid to flowinto the control chamber;
  • the ball type check valve means comprises a ball disposed in the bore and adapted to rest on the endof the tubular member extending into the bore.

Landscapes

  • 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)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
US00385130A 1973-08-02 1973-08-02 Automatic on-off sprinkler Expired - Lifetime US3812914A (en)

Priority Applications (13)

Application Number Priority Date Filing Date Title
US00385130A US3812914A (en) 1973-08-02 1973-08-02 Automatic on-off sprinkler
AU71278/74A AU486109B2 (en) 1973-08-02 1974-07-16 Automatic on-off sprinkler
NO742599A NO141782C (no) 1973-08-02 1974-07-17 Sprinklerventil.
DE2434721A DE2434721A1 (de) 1973-08-02 1974-07-18 Automatischer an-aus-sprinkler
GB3207974A GB1472569A (en) 1973-08-02 1974-07-19 Automatic on-off sprinkler
NL7410034A NL7410034A (nl) 1973-08-02 1974-07-25 Automatisch aan/uit sprinklerstelsel.
IT25708/74A IT1017708B (it) 1973-08-02 1974-07-30 Spruzzatore ad attivazione disat tivazione automatica
SE7409841A SE389273B (sv) 1973-08-02 1974-07-31 Sprinkleranordning, foretredesvis avsedd for vatten
LU70641A LU70641A1 (it) 1973-08-02 1974-07-31
DK407874A DK407874A (it) 1973-08-02 1974-07-31
BE2053790A BE818414A (nl) 1973-08-02 1974-08-02 Automatisch aan/uit sprinklerstelsel
FR7426885A FR2239261B1 (it) 1973-08-02 1974-08-02
JP49088165A JPS5043796A (it) 1973-08-02 1974-08-02

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00385130A US3812914A (en) 1973-08-02 1973-08-02 Automatic on-off sprinkler

Publications (1)

Publication Number Publication Date
US3812914A true US3812914A (en) 1974-05-28

Family

ID=23520131

Family Applications (1)

Application Number Title Priority Date Filing Date
US00385130A Expired - Lifetime US3812914A (en) 1973-08-02 1973-08-02 Automatic on-off sprinkler

Country Status (12)

Country Link
US (1) US3812914A (it)
JP (1) JPS5043796A (it)
BE (1) BE818414A (it)
DE (1) DE2434721A1 (it)
DK (1) DK407874A (it)
FR (1) FR2239261B1 (it)
GB (1) GB1472569A (it)
IT (1) IT1017708B (it)
LU (1) LU70641A1 (it)
NL (1) NL7410034A (it)
NO (1) NO141782C (it)
SE (1) SE389273B (it)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857446A (en) * 1974-05-22 1974-12-31 T Kenny Temperature-sensitive snap-action valve
US4128128A (en) * 1977-06-27 1978-12-05 Grinnell Fire Protection Systems Company, Inc. Diaphragm actuated sprinkler head
EP0018065A1 (en) * 1979-02-28 1980-10-29 MATHER & PLATT LIMITED On/off sprinkler
US4553602A (en) * 1981-08-03 1985-11-19 Pieczykolan George S Automatic on-off sprinkler head
US4923013A (en) * 1989-08-14 1990-05-08 Gennaro Sergio K De Fire sprinkler system and automatic shut-off valve therefor
US5533576A (en) * 1994-08-01 1996-07-09 Grinnell Corporation Automatic on-off fire protection sprinkler
US5954138A (en) * 1996-03-20 1999-09-21 Ceodeux-Fire Extinguisher Valves Technology S.A. Fire extinguisher valve and fire-extinguishing equipment
US6536676B2 (en) * 2000-11-07 2003-03-25 The Boc Group Plc Valves

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2213600C1 (ru) * 2002-07-04 2003-10-10 Закрытое акционерное общество "Московский экспериментальный завод "Спецавтоматика" Запорно-пусковое устройство
RU2245730C1 (ru) * 2003-08-26 2005-02-10 Кичатов Герман Вячеславович Автономное устройство пожаротушения и сигнализации

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1198743A (en) * 1907-04-08 1916-09-19 Gen Fire Extinguisher Co Dry-pipe valve.
GB230133A (en) * 1923-10-31 1925-03-02 James Wallace Improvements in automatic valve control mechanism for fire extinguishing sprinkler installations applicable also to fire alarms
US3698483A (en) * 1970-10-27 1972-10-17 Temptat Corp Automatically resettable fire sprinkler valve
US3702160A (en) * 1971-05-28 1972-11-07 Gen Ind Inc Suppressor device for automatic on-off sprinkler head

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1198743A (en) * 1907-04-08 1916-09-19 Gen Fire Extinguisher Co Dry-pipe valve.
GB230133A (en) * 1923-10-31 1925-03-02 James Wallace Improvements in automatic valve control mechanism for fire extinguishing sprinkler installations applicable also to fire alarms
US3698483A (en) * 1970-10-27 1972-10-17 Temptat Corp Automatically resettable fire sprinkler valve
US3702160A (en) * 1971-05-28 1972-11-07 Gen Ind Inc Suppressor device for automatic on-off sprinkler head

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857446A (en) * 1974-05-22 1974-12-31 T Kenny Temperature-sensitive snap-action valve
US4128128A (en) * 1977-06-27 1978-12-05 Grinnell Fire Protection Systems Company, Inc. Diaphragm actuated sprinkler head
EP0018065A1 (en) * 1979-02-28 1980-10-29 MATHER & PLATT LIMITED On/off sprinkler
US4553602A (en) * 1981-08-03 1985-11-19 Pieczykolan George S Automatic on-off sprinkler head
US4923013A (en) * 1989-08-14 1990-05-08 Gennaro Sergio K De Fire sprinkler system and automatic shut-off valve therefor
US5533576A (en) * 1994-08-01 1996-07-09 Grinnell Corporation Automatic on-off fire protection sprinkler
US5954138A (en) * 1996-03-20 1999-09-21 Ceodeux-Fire Extinguisher Valves Technology S.A. Fire extinguisher valve and fire-extinguishing equipment
US6536676B2 (en) * 2000-11-07 2003-03-25 The Boc Group Plc Valves

Also Published As

Publication number Publication date
DK407874A (it) 1975-04-07
FR2239261A1 (it) 1975-02-28
DE2434721A1 (de) 1975-02-13
NO141782B (no) 1980-02-04
AU7127874A (en) 1976-01-22
NO742599L (it) 1975-03-03
JPS5043796A (it) 1975-04-19
GB1472569A (en) 1977-05-04
NL7410034A (nl) 1975-02-04
SE7409841L (it) 1975-02-03
NO141782C (no) 1980-05-14
IT1017708B (it) 1977-08-10
LU70641A1 (it) 1975-03-06
BE818414A (nl) 1975-02-03
SE389273B (sv) 1976-11-01
FR2239261B1 (it) 1978-03-31

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