JPH02183893A - Fire detection system in glove box - Google Patents

Fire detection system in glove box

Info

Publication number
JPH02183893A
JPH02183893A JP445689A JP445689A JPH02183893A JP H02183893 A JPH02183893 A JP H02183893A JP 445689 A JP445689 A JP 445689A JP 445689 A JP445689 A JP 445689A JP H02183893 A JPH02183893 A JP H02183893A
Authority
JP
Japan
Prior art keywords
temperature
fire
output
alarm
fire extinguishing
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.)
Granted
Application number
JP445689A
Other languages
Japanese (ja)
Other versions
JPH087838B2 (en
Inventor
Yoichi Tokoro
所 要一
Teruo Shibata
柴田 照夫
Hikari Ishikawa
光 石川
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.)
Power Reactor and Nuclear Fuel Development Corp
Original Assignee
Power Reactor and Nuclear Fuel Development Corp
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 Power Reactor and Nuclear Fuel Development Corp filed Critical Power Reactor and Nuclear Fuel Development Corp
Priority to JP1004456A priority Critical patent/JPH087838B2/en
Publication of JPH02183893A publication Critical patent/JPH02183893A/en
Publication of JPH087838B2 publication Critical patent/JPH087838B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Fire Alarms (AREA)
  • Manipulator (AREA)

Abstract

PURPOSE:To surely detect fire without being affected by an atmosphere such as dirt and vapor, etc., in a glove box (GB) and to eliminate erroneous operation by monitoring a temperature in the GB by using the plural types of temperature sensors, for which the measurement principle is different. CONSTITUTION:The temperature sensor to be set in the GB is composed of at least two types of the sensors, for which the measurement principle is different, such as a platinum resistance temperature detector 1a or a thermocouple 1b, etc. The output of the temperature sensor is converted into a current value by temperature converters 3 and 4 and taken into a computer 9 as temperature data. Then, the data are inputted to warning setters 7 and 8. When the temperature is a set temperature or above a fire extinguishing equipment 12 is operated. Thus, the temperature in the GB is monitored without being affected by the atmosphere characteristic such as the dirt, vapor, etc., and a forecasting warning is exactly outputted without the erroneous operation. Then, environmental pollution due to fire extinguishing work is prevented and the operation of the fire extinguishing equipment can be executed without fail.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、核燃料物質、R1を取り扱うグローブボック
ス(以ドGBという)内火災検知システムに係り、遺伝
子工学の研究又は危険物、有害物質等を取り扱うCBに
も適用可能な火災検知システムに関する。
[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a fire detection system in a glove box (hereinafter referred to as GB) that handles nuclear fuel material, R1, and is used for research in genetic engineering, hazardous materials, harmful substances, etc. This invention relates to a fire detection system that can also be applied to CBs that handle

〔従来の技術〕[Conventional technology]

核燃料物質等を安全に取り扱い、作業環境及び周辺環境
の放射能lη染防止のために使用するCB内の火災につ
いては施設及び作業員の安全確保のため迅速、かつ的確
に検知することが必要不可欠である。
It is essential to quickly and accurately detect fires in CBs used to safely handle nuclear fuel materials and prevent radioactive contamination of the working and surrounding environments to ensure the safety of facilities and workers. It is.

従来、火災の感知器には消防法で認定されている熱感知
式、煙感知式及び熱煙感知式がある。
Conventionally, fire detectors include a heat detection type, a smoke detection type, and a heat smoke detection type that are certified under the Fire Service Act.

熱感知式はある設定温度、例えば60°C以上における
空気の膨張、金属の膨張、金属の融解、或いは熱電対の
熱起電力等を利用する方式が採られている。
The heat sensing type uses the expansion of air, the expansion of metal, the melting of metal, or the thermoelectromotive force of a thermocouple at a certain set temperature, for example, 60° C. or higher.

また、煙感知式はラジウム等、密封された微量の放射性
物質で電離された空気中に対向して設けられた2つの電
極間のイオン電流の煙に含まれる微粒子の存在による変
化を利用する方式、或いは煙の微粒子に光が衝突し、散
乱した光をフォトセルで受けて信号を出す方式等が採ら
れている。
In addition, the smoke detection method uses changes in the ionic current between two electrodes placed opposite each other in air ionized with a small amount of sealed radioactive material such as radium due to the presence of particulates contained in smoke. Alternatively, a method has been adopted in which light collides with fine particles of smoke, and the scattered light is received by a photocell to generate a signal.

これらの火災感知器からの検知信号があると火災報知器
から火災警報が発せられるようになっている。
When a detection signal is received from these fire detectors, a fire alarm is issued from the fire alarm.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

しかしながら、従来の熱感知式のものは、ある設定温度
に達したときのみ信号を出力するものが殆どであるため
、警報が遅れがちになったり、誤警報を生ずるという問
題もあった。
However, since most of the conventional heat sensing type devices output a signal only when a certain set temperature is reached, there are problems in that the alarm tends to be delayed and false alarms occur.

また、煙感知式のものは火災時の煙による微粒子のみな
らず、はこり、霧或いは蒸気等でも反応するが、GB内
では粉末状の核燃料物質を取り扱ったり、また酸蒸気の
発生等があるため、感知器がこれらに反応して誤って火
災警報を発してしまうことが考えられる。
In addition, smoke detection types react not only to particulates from smoke during a fire, but also to flakes, fog, or steam, but in GB, powdered nuclear fuel materials are handled and acid vapor is generated. Therefore, it is possible that the detector may react to these and issue a fire alarm by mistake.

したがって、これらの感知器はGB内の温度監視、火災
の感知には不適当である。
Therefore, these sensors are unsuitable for temperature monitoring and fire detection within the GB.

また、GB内の雰囲気特性はGB内での取扱物質、設置
機器によって異なるため、施設で使用する火災感知器を
一種類に統一することは困難である。
Furthermore, since the atmospheric characteristics within a GB vary depending on the substances handled and the equipment installed within the GB, it is difficult to standardize the fire detectors used in the facility into one type.

本発明はこのような事情に鑑みてなされたもので、はこ
り、蒸気等の雰囲気特性に影響されることなくGB内の
温度を監視し、予告警報を誤作動なく的確に出して誤v
l報に基づく消火作業による環境lη染を防止し、また
的確な消化設備の作動を行わせることができ財産保護を
確実に図ることができるGB内火災検知システムを提供
することを目的とする。
The present invention was made in view of the above circumstances, and it monitors the temperature inside the GB without being affected by atmospheric characteristics such as lumps and steam, and accurately issues advance warnings without causing any malfunctions.
The purpose of the present invention is to provide a fire detection system in a fire escape unit that can prevent environmental contamination due to fire extinguishing work based on a warning, operate fire extinguishing equipment accurately, and reliably protect property.

〔課題を解決するための手段] そのために本発明のグローブボックス内火災検知システ
ムは、グローブボンクス内に設置した測定原理の異なる
複数種類の温度センサ、前記iM数種類の温度センサの
出力電圧値又は、出力抵抗値をそれぞれ電流値に変換す
る温度変換器、各温度変換器の少なくとも一つの出力が
第1の設定温度に対応する第1の設定TL電流値達した
ことを条件に駆動され、予告警報を発する予告警報器、
各温度変換器の出力が第1の設定電流値より大きい、第
2の設定温度に対応する第2の設定T4流値に達すると
出力する複数の警報設定器、各警報設定器の出力が入力
されるAND回路、AND回路出力があったことを条件
ムこ駆動される火災警報器及び消火設備を備え、少なく
とも一つの温度センサが第1の設定温度に達したことを
検知した時に予告警報を発し、さらに各温度センサが第
2の設定温度に達したことを検知した時に火災警報を発
すると共に、消火設備を起動させることを特徴とする。
[Means for Solving the Problems] To this end, the glove box fire detection system of the present invention uses a plurality of types of temperature sensors with different measurement principles installed in the glove box, output voltage values of the iM several types of temperature sensors, or , a temperature converter that converts each output resistance value into a current value, and is driven on the condition that at least one output of each temperature converter reaches a first set TL current value corresponding to the first set temperature, and is driven with advance notice. Advance warning device that issues a warning;
A plurality of alarm setting devices output when the output of each temperature converter reaches a second setting T4 current value corresponding to a second setting temperature, which is larger than the first setting current value, and the output of each alarm setting device is input The system is equipped with a fire alarm and fire extinguishing equipment that is activated on the condition that there is an AND circuit output, and that an advance warning is issued when at least one temperature sensor detects that the first set temperature has been reached. The system is characterized in that when each temperature sensor detects that the second set temperature has been reached, a fire alarm is issued and fire extinguishing equipment is activated.

〔作用〕[Effect]

本発明のGB内火災検知システムは、GB内に測定原理
の異なる複数種類の温度センサを配置すると共に、予告
V報温度及びそれより高い火災警報及び消火設備作動温
度を設定し、少なく共−つの温度センサで予告警報温度
が検出されたときに予告警報を発し、さらに各温度セン
サが火災′W報及び消火設備作動温度を検知したとき火
災警報を発すると共に、消火設備を起動させるようにし
たので、早期の予告v報を発することができると共に、
誤って消火設備を起動さゼることを防止することができ
る。
The in-GB fire detection system of the present invention arranges a plurality of types of temperature sensors with different measurement principles in the GB, and also sets a pre-warning warning temperature and a higher fire alarm and fire extinguishing equipment operating temperature. When the temperature sensor detects the warning alarm temperature, an advance warning is issued, and when each temperature sensor detects a fire warning and fire extinguishing equipment operating temperature, a fire alarm is issued and the fire extinguishing equipment is activated. , it is possible to issue early warning notices, and
This can prevent accidental activation of fire extinguishing equipment.

(実施例) 以下、図面を参照しつつ本発明の実施例について説明す
る。
(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

第1図は本発明によるGB内火災検知システムの一実施
例を示す図、第2図は火災検知・ハロン消火設備の作動
フローを説明するための図である。
FIG. 1 is a diagram showing an embodiment of the fire detection system in a GB according to the present invention, and FIG. 2 is a diagram for explaining the operational flow of the fire detection/halon extinguishing equipment.

図中、lはGB、laは白金側)ハ抵抗体、1bは熱電
対、3.4は温度変換器、6は火災警報器、7.8は警
報設定器、9は計算機、10は予告警報器、11はAN
D回路、12はCB内消火設備、12aはハロン制御盤
、12bは起動用ガスポンベ、12cはハロンボンへあ
る。
In the figure, l is GB, la is platinum side) C resistor, 1b is thermocouple, 3.4 is temperature converter, 6 is fire alarm, 7.8 is alarm setting device, 9 is calculator, 10 is notice Alarm, 11 is AN
D circuit, 12 is the fire extinguishing equipment in the CB, 12a is the halon control panel, 12b is the starting gas pump, and 12c is to the halon bomb.

図において、CBはステンレス鋼製の缶体、窓板及びグ
ローブ等で気密に作られている。缶体はステンレス鋼製
であるので、CB内で火災が発生した場合に、CBの気
密性に影響を与えるものは窓板及びグローブである。通
常、窓板はアクリル板を使用しており、アクリル板の熱
変形温度はカタログ値で90〜100°C1実験値で9
5〜1゜5°Cである。また、ネオプレン製のグローブ
の耐熱温度は実験値で約180°Cである。CB内に設
置される温度センサは、測定原理の異なる少なくとも2
種類のセンサ、例えば白金測温抵抗体1a、熱電対1b
とからなっている。そして、温度センサの出力は、温度
変IA器3.4により電流値に変換されて計算機9に温
度データとして取り込まれると共に、警報設定器7.8
に入力され、設定温度以上になると消火設備12を作動
させるようになっている。消火膜(1112は、ハロン
制御盤12a、起動用ガスボンへ12b、ハロンボンへ
12Cからなっていて、火災信号が入力されるとハロン
制?11’!it l 2 aにより起動用ガスボンへ
12bが先ず作動し、この作動によりハロンポンベが駆
動されてCB内にハロンガスが放出されるようになって
いる。
In the figure, the CB is made airtight with a stainless steel can body, window plate, glove, etc. Since the can body is made of stainless steel, if a fire breaks out inside the CB, the window plate and the globe will affect the airtightness of the CB. Usually, acrylic plates are used for window panels, and the heat distortion temperature of acrylic plates is 90 to 100°C according to the catalog value, and 9 according to the experimental value.
5-1°5°C. Furthermore, the heat resistance temperature of neoprene gloves is approximately 180°C according to an experimental value. There are at least two temperature sensors installed in the CB with different measurement principles.
types of sensors, such as platinum resistance thermometer 1a, thermocouple 1b
It consists of The output of the temperature sensor is converted into a current value by the temperature converter IA device 3.4 and taken into the computer 9 as temperature data, and the alarm setting device 7.8
is input to the temperature, and when the temperature exceeds the set temperature, the fire extinguishing equipment 12 is activated. The fire extinguishing membrane (1112) consists of a halon control panel 12a, a gas cylinder for starting 12b, and a gas cylinder for halon 12C. This operation drives the halon pump and releases halon gas into the CB.

次に火災警報を出す場合の処理フローについて説明する
Next, the processing flow when issuing a fire alarm will be explained.

2種類の温度センサla及びtbからの出力を温度変換
器3及び4により電流値(4〜20mA10〜100°
C)に変換する。これら温度変換器の出力電流値をディ
ジタル化してCB内湯温度監視用計算機9取り込む。そ
して、白金測温抵抗体la或いは熱電対1bの少なくと
も一つから、例えば40°Cに対応した電流値6.4m
Aの入力がある場合に予告警+す器lOで予告警報を発
し、作業員に異常を知らIる(第2図■〜■)。この時
の設定温度はCB内の温度異常を早期に知らせるための
もので、まだ火災に到らない状態に対応する値に設定し
ている。作業員はこの予告警報により現場を目視等によ
り確認し、原因が解明した場合にはそれを除去して処理
は終わることになる(第2図■、■)。
The outputs from the two types of temperature sensors la and tb are converted into current values (4 to 20 mA, 10 to 100°) by temperature converters 3 and 4.
C). The output current values of these temperature converters are digitized and imported into the CB hot water temperature monitoring calculator 9. Then, from at least one of the platinum resistance thermometer la or the thermocouple 1b, a current value of 6.4 m corresponding to, for example, 40°C is generated.
When there is an input of A, a warning alarm is issued using the warning alarm + device lO, and the worker is informed of the abnormality (Fig. 2 - ■). The set temperature at this time is intended to notify the temperature abnormality in the CB at an early stage, and is set to a value that corresponds to a state that does not yet cause a fire. The worker visually checks the site based on this advance warning, and if the cause is determined, it is removed and the process is completed (Fig. 2 ■, ■).

また、温度変換器3及び4の出力はそれぞれ警報設定i
!if 7及び8を介してAND回路11に入力されて
いる。そして、CB内の温度異常の状態が改善されず、
さらに、温度が上昇した場合、例えば警報設定器7及び
8の設定値60°Cを両センサが検知した場合にはCB
内大火災警報器6吹鳴し、同時にハロン消火設備12の
ハロン制御盤+2aに対してCBB災信号を出力する。
In addition, the outputs of temperature converters 3 and 4 are each set to alarm setting i.
! It is input to the AND circuit 11 via if 7 and 8. Then, the temperature abnormality inside the CB is not improved,
Furthermore, if the temperature rises, for example, if both sensors detect the set value of 60°C on alarm setting devices 7 and 8, the CB
The internal large fire alarm 6 sounds, and at the same time a CBB disaster signal is output to the halon control panel +2a of the halon fire extinguishing equipment 12.

この60°Cという設定値は、アクリル板の熱変形温度
をもとに、さらに安全側になるように設定した値であり
、設定値60 ’Cの検出は測定原理の異なる2種類の
センサで検出しているので、誤検出の確率は大幅に低減
化する。そして、ハロン制御盤12aはCBB災信号が
人力されるとハロン放出信号を起動用ガスボンベ12b
に対して出力し、その結果ハロンボンへ12cが作動し
てCB内に対してハロンガスの放出が行われ、消火作業
が行われることになる(第2図■〜■)。
This set value of 60°C is a value set to be on the safer side based on the thermal deformation temperature of the acrylic plate, and the detection of the set value of 60'C is performed using two types of sensors with different measurement principles. Since the detection is performed, the probability of false detection is greatly reduced. Then, when the CBB disaster signal is input manually, the halon control panel 12a sends a halon release signal to the gas cylinder 12b for starting.
As a result, the halon gas 12c is activated to release halon gas into the CB, and fire extinguishing work is carried out (Fig. 2 - ■).

なお、上記実施例では白金測温抵抗体と熱電対を使用す
る例について述べたが、本発明はこれに限定されるもの
ではなく、グローブボックスで扱う対象に応して適宜他
のタイプのセンサを用いてもよく、さらにセンサの種類
も2種類でなく、3種類以上適宜使用することが可能で
ある。
Although the above embodiment describes an example in which a platinum resistance temperature detector and a thermocouple are used, the present invention is not limited to this, and other types of sensors may be used as appropriate depending on the objects handled in the glove box. It is also possible to use not only two types of sensors but three or more types of sensors as appropriate.

〔発明の効果〕〔Effect of the invention〕

以上のように本発明によれば、測定原理の異なる複数種
類の温度センサを使用してCB内の温度を監視すること
により、はこり、蒸気等のCB内内凹囲気影響されるこ
となく的確に火災が検知でき、誤作動がなくなるため、
ハロン消火設備の誤放出がなくなり、ハロンガスによる
環境汚染を防止することができる。
As described above, according to the present invention, by monitoring the temperature inside the CB using multiple types of temperature sensors with different measurement principles, it is possible to accurately monitor the temperature inside the CB without being affected by the air inside the CB such as lumps and steam. Since fire can be detected and there will be no malfunctions,
Accidental discharge of halon fire extinguishing equipment is eliminated, and environmental pollution caused by halon gas can be prevented.

また、火災発生の前段階で、予告警報を発することがで
きるため、異常の早期発見が可能となり、財産の保護に
大きな効果がある。
Furthermore, since advance warnings can be issued before a fire occurs, early detection of abnormalities is possible, which is highly effective in protecting property.

さらに、計算機及びハロン消火設備と組み合わせること
で、自動消火システムを構築でき、自動工場、夜間の保
全管理等に活用が可能となり、安全性の向上、保全管理
の省力化に寄与できる。
Furthermore, by combining it with a computer and halon fire extinguishing equipment, an automatic fire extinguishing system can be constructed, which can be used in automatic factories, nighttime maintenance management, etc., contributing to improved safety and labor savings in maintenance management.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明によるCB内大火災検知器システム一実
施例を示す図、第2図は火災検知・ノ10ン消火設備の
作動フローを説明するための図である。 1−GB、1a−白金測温抵抗体、lb−熱電対、3.
4 温度変換器、6−火災警報器、7.8 警報設定器
、9−・−計算機、1〇−警報器、11−A N D回
路、12−G B消火設備、12 a −ハロン制′4
′n盤、12b・・・起動用ガスボンベ、12C・・・
ハロンボンベ。 出 願 人   動力炉・核燃#i開発事業団代理人弁
理士  蛭 川 昌 信(外5名)第2
FIG. 1 is a diagram showing an embodiment of the CB large fire detector system according to the present invention, and FIG. 2 is a diagram for explaining the operational flow of the fire detection/extinguishing equipment. 1-GB, 1a-platinum resistance thermometer, lb-thermocouple, 3.
4 Temperature converter, 6-Fire alarm, 7.8 Alarm setting device, 9--Calculator, 10-Alarm, 11-A N D circuit, 12-GB fire extinguishing equipment, 12 a-Halon control' 4
'n board, 12b...starting gas cylinder, 12C...
Halon cylinder. Applicant: Power Reactor and Nuclear Fuel #i Development Corporation, Patent Attorney Masanobu Hirugawa (5 others) 2nd

Claims (2)

【特許請求の範囲】[Claims] (1)グローブボックス内に設置した測定原理の異なる
複数種類の温度センサ、前記複数種類の温度センサの出
力電圧値又は、出力抵抗値をそれぞれ電流値に変換する
温度変換器、各温度変換器の少なくとも一つの出力が第
1の設定温度に対応する第1の設定電流値に達したこと
を条件に駆動され、予告警報を発する予告警報器、各温
度変換器の出力が第1の設定電流値より大きい、第2の
設定温度に対応する第2の設定電流値に達すると出力す
る複数の警報設定器、各警報設定器の出力が入力される
AND回路、AND回路出力があったことを条件に駆動
される火災警報器及び消火手段を備え、少なくとも一つ
の温度センサが第1の設定温度に達したことを検知した
時に予告警報を発し、さらに各温度センサが第2の設定
温度に達したことを検知した時に火災警報を発すると共
に、消火設備を作動させることを特徴とするグローブボ
ックス内火災検知システム。
(1) Multiple types of temperature sensors with different measurement principles installed in the glove box, temperature converters that convert the output voltage values or output resistance values of the multiple types of temperature sensors into current values, and each temperature converter. A warning alarm that is activated and issues a warning when at least one output reaches a first set current value corresponding to a first set temperature, and the output of each temperature converter is set to the first set current value. The condition is that there are multiple alarm setting devices that output when the second set current value corresponding to the second set temperature, which is larger, is reached, an AND circuit into which the output of each alarm setting device is input, and an AND circuit output. a fire alarm and a fire extinguishing means driven by the system, and issues a preliminary alarm when at least one temperature sensor detects that a first set temperature has been reached, and furthermore, when each temperature sensor has reached a second set temperature. A glove box fire detection system is characterized by issuing a fire alarm and activating fire extinguishing equipment when a fire is detected.
(2)複数種類の温度センサは、測温抵抗体と熱電対で
ある請求項1記載のグローブボックス内火災検知システ
ム。
(2) The glove box fire detection system according to claim 1, wherein the plurality of types of temperature sensors are a resistance temperature sensor and a thermocouple.
JP1004456A 1989-01-11 1989-01-11 Automatic fire extinguishing equipment in glove box Expired - Lifetime JPH087838B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1004456A JPH087838B2 (en) 1989-01-11 1989-01-11 Automatic fire extinguishing equipment in glove box

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1004456A JPH087838B2 (en) 1989-01-11 1989-01-11 Automatic fire extinguishing equipment in glove box

Publications (2)

Publication Number Publication Date
JPH02183893A true JPH02183893A (en) 1990-07-18
JPH087838B2 JPH087838B2 (en) 1996-01-29

Family

ID=11584653

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1004456A Expired - Lifetime JPH087838B2 (en) 1989-01-11 1989-01-11 Automatic fire extinguishing equipment in glove box

Country Status (1)

Country Link
JP (1) JPH087838B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013165818A1 (en) * 2012-05-04 2013-11-07 Siemens Energy, Inc. System and method for detecting electric power plant equipment overheating with real-time plural parallel detection and analysis parameters
JP2013232036A (en) * 2012-04-27 2013-11-14 Hochiki Corp Alarm system
CN105279889A (en) * 2014-06-02 2016-01-27 西门子瑞士有限公司 Danger warning system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106346451A (en) * 2016-10-31 2017-01-25 苏州立源信智能科技有限公司 Truss robot with fire alarm function

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5035182U (en) * 1973-07-25 1975-04-14
JPS52126198A (en) * 1976-04-15 1977-10-22 Yuwa Sangyo Kk Composite early fire detecting system
JPS5364000A (en) * 1976-11-16 1978-06-07 Cerberus Ag Fire alarm

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5035182U (en) * 1973-07-25 1975-04-14
JPS52126198A (en) * 1976-04-15 1977-10-22 Yuwa Sangyo Kk Composite early fire detecting system
JPS5364000A (en) * 1976-11-16 1978-06-07 Cerberus Ag Fire alarm

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013232036A (en) * 2012-04-27 2013-11-14 Hochiki Corp Alarm system
WO2013165818A1 (en) * 2012-05-04 2013-11-07 Siemens Energy, Inc. System and method for detecting electric power plant equipment overheating with real-time plural parallel detection and analysis parameters
CN104285189A (en) * 2012-05-04 2015-01-14 西门子能量股份有限公司 System and method for detecting electric power plant equipment overheating with real-time plural parallel detection and analysis parameters
US9158302B2 (en) 2012-05-04 2015-10-13 Siemens Energy, Inc. System and method for detecting electric power plant equipment overheating with real-time plural parallel detection and analysis parameters
CN105279889A (en) * 2014-06-02 2016-01-27 西门子瑞士有限公司 Danger warning system

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