FR2247773B1 - - Google Patents

Info

Publication number
FR2247773B1
FR2247773B1 FR7403229A FR7403229A FR2247773B1 FR 2247773 B1 FR2247773 B1 FR 2247773B1 FR 7403229 A FR7403229 A FR 7403229A FR 7403229 A FR7403229 A FR 7403229A FR 2247773 B1 FR2247773 B1 FR 2247773B1
Authority
FR
France
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
Application number
FR7403229A
Other languages
French (fr)
Other versions
FR2247773A1 (enrdf_load_stackoverflow
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.)
VISSER ROBERTUS
Original Assignee
VISSER ROBERTUS
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 VISSER ROBERTUS filed Critical VISSER ROBERTUS
Publication of FR2247773A1 publication Critical patent/FR2247773A1/fr
Application granted granted Critical
Publication of FR2247773B1 publication Critical patent/FR2247773B1/fr
Expired legal-status Critical Current

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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
    • G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
    • G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
    • G01N27/122—Circuits particularly adapted therefor, e.g. linearising circuits

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Emergency Management (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Business, Economics & Management (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Emergency Alarm Devices (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
FR7403229A 1973-10-10 1974-01-31 Expired FR2247773B1 (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7313897A NL7313897A (nl) 1973-10-10 1973-10-10 Gasindicator.

Publications (2)

Publication Number Publication Date
FR2247773A1 FR2247773A1 (enrdf_load_stackoverflow) 1975-05-09
FR2247773B1 true FR2247773B1 (enrdf_load_stackoverflow) 1977-09-16

Family

ID=19819783

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7403229A Expired FR2247773B1 (enrdf_load_stackoverflow) 1973-10-10 1974-01-31

Country Status (6)

Country Link
US (1) US3895367A (enrdf_load_stackoverflow)
JP (1) JPS5067197A (enrdf_load_stackoverflow)
BE (1) BE808064A (enrdf_load_stackoverflow)
DE (1) DE2402493A1 (enrdf_load_stackoverflow)
FR (1) FR2247773B1 (enrdf_load_stackoverflow)
NL (1) NL7313897A (enrdf_load_stackoverflow)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH598601A5 (enrdf_load_stackoverflow) * 1975-07-10 1978-05-12 Richard Hunziker
US4007456A (en) * 1975-12-01 1977-02-08 Craftor Inc. Gas detecting and warning system
US4065759A (en) * 1976-01-07 1977-12-27 Handing Theodore E Smoke detector
DE2709487A1 (de) * 1976-03-17 1977-09-22 Nohmi Bosai Kogyo Co Ltd Brandmelder
US4088986A (en) * 1976-10-01 1978-05-09 Boucher Charles E Smoke, fire and gas alarm with remote sensing, back-up emergency power, and system self monitoring
US4096473A (en) * 1976-12-09 1978-06-20 P.R. Mallory & Co. Inc. High output smoke and heat detector alarm system utilizing a piezoelectric transducer and a voltage doubling means
GB1557921A (en) * 1977-01-10 1979-12-19 British Steel Corp Gas monitors
USRE30620E (en) * 1978-07-03 1981-05-19 P. R. Mallory & Co. Inc. High output smoke and heat detector alarm system utilizing a piezoelectric transducer and a voltage doubling means
FR2431124A1 (fr) * 1978-07-11 1980-02-08 Silvy Bruno Appareil de detection d'alcoolemie
US4225860A (en) * 1979-01-15 1980-09-30 Pittway Corporation Sensitivity controlled dual input fire detector
JPS55166163A (en) * 1979-06-13 1980-12-25 Citizen Watch Co Ltd Controller for anesthetic gas
US4335379A (en) * 1979-09-13 1982-06-15 Martin John R Method and system for providing an audible alarm responsive to sensed conditions
IT212760Z2 (it) * 1985-02-13 1989-09-20 Salutati Giovanni Pistolozzi M Sistema di protezione contro le fughe di gas 'protector-gas'
DE102014019172B4 (de) 2014-12-17 2023-12-07 Elmos Semiconductor Se Vorrichtung und Verfahren zur Unterscheidung von festen Objekten, Kochdunst und Rauch mit einem kompensierenden optischen Messsystem
DE102014019773B4 (de) 2014-12-17 2023-12-07 Elmos Semiconductor Se Vorrichtung und Verfahren zur Unterscheidung von festen Objekten, Kochdunst und Rauch mittels des Displays eines Mobiltelefons
CN110164066A (zh) * 2017-12-29 2019-08-23 郑州天舜电子技术有限公司 一种安全警戒指示灯

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3733595A (en) * 1971-02-12 1973-05-15 E Benedict Condition responsive switching circuit
JPS5320668Y2 (enrdf_load_stackoverflow) * 1972-06-07 1978-05-31

Also Published As

Publication number Publication date
FR2247773A1 (enrdf_load_stackoverflow) 1975-05-09
DE2402493A1 (de) 1975-04-30
NL7313897A (nl) 1975-04-14
JPS5067197A (enrdf_load_stackoverflow) 1975-06-05
US3895367A (en) 1975-07-15
BE808064A (nl) 1974-03-15

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Legal Events

Date Code Title Description
ST Notification of lapse