IE821010L - Inflammable gas detector device - Google Patents

Inflammable gas detector device

Info

Publication number
IE821010L
IE821010L IE821010A IE101082A IE821010L IE 821010 L IE821010 L IE 821010L IE 821010 A IE821010 A IE 821010A IE 101082 A IE101082 A IE 101082A IE 821010 L IE821010 L IE 821010L
Authority
IE
Ireland
Prior art keywords
unbalance
detector
bridge
gas detector
detector device
Prior art date
Application number
IE821010A
Other versions
IE52445B1 (en
Original Assignee
Conte Franco Maria
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 Conte Franco Maria filed Critical Conte Franco Maria
Publication of IE821010L publication Critical patent/IE821010L/en
Publication of IE52445B1 publication Critical patent/IE52445B1/en

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B17/00—Fire alarms; Alarms responsive to explosion
    • G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
    • G08B17/117—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means by using a detection device for specific gases, e.g. combustion products, produced by the fire

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
  • Emergency Alarm Devices (AREA)
  • Control Of Combustion (AREA)

Abstract

The detector (R) is formed of a spiral of thin platinum alloy wire enclosed in a Davy cage of fine metallic grids to prevent flame propagation in the event of ignition within. It is connected in a bridge circuit with potentiometer (R3) and two fixed resistor (R2, R4), supplied with rectified AC from a series transistor (T1) and Zener diode stabiliser (Z1). The unbalance of the bridge is monitored by a differential amplifier (Ad) which controls a low-frequency tone generator (IC2). When the threshold of unbalance is exceeded due to a concn. of gas within the detector, an alarm is given by an electroacoustic device (TA). A standby battery and delay circuit may be provided to ensure operation following failure of the AC supply or rectifier. [EP0065497A1]
IE1010/82A 1981-05-05 1982-04-29 Inflammable gas detector device IE52445B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT09399/81A IT1167878B (en) 1981-05-05 1981-05-05 FLAMMABLE GAS DETECTOR

Publications (2)

Publication Number Publication Date
IE821010L true IE821010L (en) 1982-11-05
IE52445B1 IE52445B1 (en) 1987-10-28

Family

ID=11129547

Family Applications (1)

Application Number Title Priority Date Filing Date
IE1010/82A IE52445B1 (en) 1981-05-05 1982-04-29 Inflammable gas detector device

Country Status (21)

Country Link
EP (1) EP0065497B1 (en)
JP (2) JPS57186160A (en)
AR (1) AR228973A1 (en)
AT (1) ATE15562T1 (en)
AU (2) AU8322682A (en)
BR (1) BR8202411A (en)
CA (1) CA1237505A (en)
DE (1) DE3266133D1 (en)
DK (1) DK159167C (en)
ES (1) ES511787A0 (en)
FI (1) FI75430C (en)
GR (1) GR75842B (en)
IE (1) IE52445B1 (en)
IL (1) IL65497A0 (en)
IT (1) IT1167878B (en)
MX (1) MX151271A (en)
NO (1) NO153236C (en)
NZ (1) NZ200307A (en)
PT (1) PT74843B (en)
YU (1) YU44342B (en)
ZA (1) ZA823039B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1198606B (en) * 1983-05-17 1988-12-21 Controfugas Srl FLAMMABLE GAS DETECTOR APPARATUS WITH PRECONDITIONED INTERVENTION
JPS6071999U (en) * 1983-10-21 1985-05-21 矢崎総業株式会社 gas alarm
NO317999B3 (en) 2002-06-28 2010-07-05 Sts Gruppen As Device for securing the operation of a habitat

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3221320A (en) * 1961-04-13 1965-11-30 Komyo Rikagaku Kogyo Kabushiki Gas alarm circuit
US3482233A (en) * 1967-04-13 1969-12-02 Eastern Co Gas detector system
BE788001A (en) * 1971-11-01 1973-02-26 T J Connelly Construction Cy I SMOKE SENSITIVE CIRCUIT, WITH BACKUP BATTERY
IT951304B (en) * 1972-04-11 1973-06-30 Rimoldi V E C Spa OCN SEWING MACHINE UPPER ROTEL WORK CONVEYOR THE ADJUSTABLE INDEPENDENTLY FROM THE LOWER JAW CONVEYOR
US3950739A (en) * 1974-10-30 1976-04-13 Campman James P Detector for detecting and locating the source of a contaminating gas or smoke in the atmosphere
GB1474700A (en) * 1974-12-16 1977-05-25 Neotronics Ltd Device for detecting and indicating the presence in a fluid environment of a potentially dangerous constituent
JPS51106674A (en) * 1975-03-16 1976-09-21 Masanori Mochizuki BENDEINGUROORUKI
JPS5216987U (en) * 1975-07-24 1977-02-05
JPS5511496Y2 (en) * 1975-11-17 1980-03-12
JPS5433185U (en) * 1977-08-09 1979-03-05

Also Published As

Publication number Publication date
AU1843388A (en) 1988-09-22
JPS57186160A (en) 1982-11-16
NO821461L (en) 1982-11-08
YU94582A (en) 1985-03-20
JPH0374352U (en) 1991-07-25
NO153236B (en) 1985-10-28
GR75842B (en) 1984-08-02
IT1167878B (en) 1987-05-20
ES8304343A1 (en) 1983-02-16
FI821569A0 (en) 1982-05-05
CA1237505A (en) 1988-05-31
IE52445B1 (en) 1987-10-28
BR8202411A (en) 1983-04-12
DK185582A (en) 1982-11-06
EP0065497A1 (en) 1982-11-24
AU8322682A (en) 1982-11-11
NO153236C (en) 1986-02-05
JPH0424439Y2 (en) 1992-06-09
ATE15562T1 (en) 1985-09-15
YU44342B (en) 1990-06-30
IT8109399A0 (en) 1981-05-05
ES511787A0 (en) 1983-02-16
ZA823039B (en) 1983-03-30
DE3266133D1 (en) 1985-10-17
DK159167B (en) 1990-09-10
FI821569L (en) 1982-11-06
DK159167C (en) 1991-02-11
MX151271A (en) 1984-10-29
EP0065497B1 (en) 1985-09-11
PT74843A (en) 1982-06-01
PT74843B (en) 1983-12-02
NZ200307A (en) 1985-05-31
AR228973A1 (en) 1983-05-13
IL65497A0 (en) 1982-07-30
FI75430C (en) 1988-06-09
FI75430B (en) 1988-02-29

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Legal Events

Date Code Title Description
MM4A Patent lapsed