FR2460012B1 - - Google Patents

Info

Publication number
FR2460012B1
FR2460012B1 FR8014404A FR8014404A FR2460012B1 FR 2460012 B1 FR2460012 B1 FR 2460012B1 FR 8014404 A FR8014404 A FR 8014404A FR 8014404 A FR8014404 A FR 8014404A FR 2460012 B1 FR2460012 B1 FR 2460012B1
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
FR8014404A
Other languages
French (fr)
Other versions
FR2460012A1 (fr
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.)
Hochiki Corp
Original Assignee
Hochiki 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
Priority claimed from JP8009579A external-priority patent/JPS5932838B2/ja
Priority claimed from JP8344679A external-priority patent/JPS5832439B2/ja
Application filed by Hochiki Corp filed Critical Hochiki Corp
Publication of FR2460012A1 publication Critical patent/FR2460012A1/fr
Application granted granted Critical
Publication of FR2460012B1 publication Critical patent/FR2460012B1/fr
Granted 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
    • G08B17/103—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using a light emitting and receiving device

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Optical Communication System (AREA)
FR8014404A 1979-06-27 1980-06-27 Detecteur photo-electrique Granted FR2460012A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP8009579A JPS5932838B2 (ja) 1979-06-27 1979-06-27 光電式検出器
JP8344679A JPS5832439B2 (ja) 1979-07-03 1979-07-03 減光式分離型火災感知器

Publications (2)

Publication Number Publication Date
FR2460012A1 FR2460012A1 (fr) 1981-01-16
FR2460012B1 true FR2460012B1 (enExample) 1983-12-16

Family

ID=26421141

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8014404A Granted FR2460012A1 (fr) 1979-06-27 1980-06-27 Detecteur photo-electrique

Country Status (7)

Country Link
US (1) US4333724A (enExample)
AT (1) AT384903B (enExample)
AU (1) AU533232B2 (enExample)
CH (1) CH637779A5 (enExample)
DE (1) DE3023784C2 (enExample)
FR (1) FR2460012A1 (enExample)
GB (1) GB2057121B (enExample)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4640621A (en) * 1983-06-17 1987-02-03 Eastern Technical Associates, Inc. Transmissometer and optical elements therefor
JPS61194784A (ja) * 1985-02-23 1986-08-29 Hitachi Ltd 光学的物体検知回路
HU195589B (en) * 1986-09-15 1988-05-30 Peter Hakkel Portable optical system for protecting field
US4914720A (en) * 1986-12-04 1990-04-03 Cascadia Technology Corporation Gas analyzers
US4859858A (en) * 1986-12-04 1989-08-22 Cascadia Technology Corporation Gas analyzers
DE3715507A1 (de) * 1987-05-09 1988-11-17 Berufsgenossenschaft Nahrungsm Verfahren und vorrichtung zur messung von staubkonzentrationen in gasen oder festpartikelkonzentrationen in fluessigkeiten
GB9905155D0 (en) * 1999-03-06 1999-04-28 Mayer David Signalling device
DE19940280C2 (de) 1999-08-26 2001-11-15 Draeger Safety Ag & Co Kgaa Gassensor mit offener optischer Meßstrecke
US7017408B2 (en) * 2004-02-13 2006-03-28 Be Intellectual Property, Inc. Electro-optic liquid level sensing system for aircraft beverage brewing
US8102259B2 (en) 2006-10-17 2012-01-24 Honeywell International Inc. Fluorescent light immunity through synchronous sampling
US10786948B2 (en) 2014-11-18 2020-09-29 Sigma Labs, Inc. Multi-sensor quality inference and control for additive manufacturing processes
US10207489B2 (en) * 2015-09-30 2019-02-19 Sigma Labs, Inc. Systems and methods for additive manufacturing operations

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1082973A (en) * 1964-04-02 1967-09-13 Int Research & Dev Co Ltd Electrical interrupted-beam alarm systems
CH417405A (de) * 1964-07-14 1966-07-15 Cerberus Ag Werk Fuer Elektron Vorrichtung zur Feststellung von Aerosolen in Luft
CH424968A (de) * 1965-08-04 1966-11-30 Zellweger Uster Ag Verfahren und Vorrichtung zur Steuerung von elektrischen Apparaten mit Hilfe von insbesondere tonfrequenten Impulsen, die dem Starkstromnetz überlagert werden
DE2059656A1 (de) * 1970-12-04 1972-06-29 Alfons Endl Lichtschranke mit einer Schaltung zum Konstanthalten der Schaltwelle
US3846772A (en) * 1972-08-11 1974-11-05 Chubb Fire Security Ltd Fire detector responsive to amplitude modulation of a pulsed em beam
US3889118A (en) * 1973-06-14 1975-06-10 Rockwell International Corp Electronic presence sensing device
US3973852A (en) * 1974-08-30 1976-08-10 The Dow Chemical Company Method and apparatus for measuring particulate concentration in the atmosphere
US3995960A (en) * 1975-07-25 1976-12-07 Nasa Method and apparatus for background signal reduction in opto-acoustic absorption measurement
US4065759A (en) * 1976-01-07 1977-12-27 Handing Theodore E Smoke detector
US4126790A (en) * 1976-09-20 1978-11-21 Solomon Elias E Strobed smoke detector
US4200399A (en) * 1978-11-20 1980-04-29 General Motors Corporation Resonant optoacoustic spectroscopy apparatus

Also Published As

Publication number Publication date
FR2460012A1 (fr) 1981-01-16
ATA336280A (de) 1987-06-15
DE3023784A1 (de) 1981-01-22
CH637779A5 (fr) 1983-08-15
GB2057121A (en) 1981-03-25
AU5941280A (en) 1981-01-08
AU533232B2 (en) 1983-11-10
DE3023784C2 (de) 1983-09-29
AT384903B (de) 1988-01-25
US4333724A (en) 1982-06-08
GB2057121B (en) 1983-04-27

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Legal Events

Date Code Title Description
ST Notification of lapse