FR2128315B1 - - Google Patents

Info

Publication number
FR2128315B1
FR2128315B1 FR7204088A FR7204088A FR2128315B1 FR 2128315 B1 FR2128315 B1 FR 2128315B1 FR 7204088 A FR7204088 A FR 7204088A FR 7204088 A FR7204088 A FR 7204088A FR 2128315 B1 FR2128315 B1 FR 2128315B1
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
FR7204088A
Other versions
FR2128315A1 (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.)
ENVIRONMENT CORP
Original Assignee
ENVIRONMENT 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 ENVIRONMENT CORP filed Critical ENVIRONMENT CORP
Publication of FR2128315A1 publication Critical patent/FR2128315A1/fr
Application granted granted Critical
Publication of FR2128315B1 publication Critical patent/FR2128315B1/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
    • G08B17/103—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
    • G08B17/107—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 for detecting light-scattering due to smoke
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/06—Investigating concentration of particle suspensions
    • G01N15/065—Investigating concentration of particle suspensions using condensation nuclei counters

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Fire Alarms (AREA)
  • Amplifiers (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
FR7204088A 1971-02-08 1972-02-08 Expired FR2128315B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11356171A 1971-02-08 1971-02-08

Publications (2)

Publication Number Publication Date
FR2128315A1 FR2128315A1 (fr) 1972-09-22
FR2128315B1 true FR2128315B1 (fr) 1976-08-20

Family

ID=22350143

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7204088A Expired FR2128315B1 (fr) 1971-02-08 1972-02-08

Country Status (7)

Country Link
US (1) US3678488A (fr)
CA (1) CA1003524A (fr)
CH (1) CH549250A (fr)
DE (1) DE2205690A1 (fr)
FR (1) FR2128315B1 (fr)
GB (2) GB1379921A (fr)
IT (1) IT947365B (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2327497C3 (de) * 1973-05-30 1981-12-24 Benno 5430 Wettingen Aargau Perren Melder für Widerstandsänderungen mit nachgeschalteter Alarmeinrichtung
GB8913773D0 (en) * 1989-06-15 1989-08-02 Fire Fighting Enterprises Uk L Particle detectors
JP3231886B2 (ja) * 1993-03-31 2001-11-26 能美防災株式会社 光電式火災感知器
JP4396079B2 (ja) † 2000-03-28 2010-01-13 パナソニック電工株式会社 粒子センサー
US9239025B2 (en) * 2009-06-29 2016-01-19 GM Global Technology Operations LLC Condensation detection systems and methods
CN113327395A (zh) * 2021-05-13 2021-08-31 蚌埠依爱消防电子有限责任公司 一种扩大光电式烟雾探测器响应量程的方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3618061A (en) * 1969-04-30 1971-11-02 Eaton Yale & Towne Monitoring apparatus for monitoring the density of a material carried by a fluid and the flow of the fluid

Also Published As

Publication number Publication date
US3678488A (en) 1972-07-18
GB1379922A (en) 1975-01-08
GB1379921A (en) 1975-01-08
IT947365B (it) 1973-05-21
DE2205690A1 (de) 1972-08-10
CH549250A (de) 1974-05-15
CA1003524A (en) 1977-01-11
FR2128315A1 (fr) 1972-09-22

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Legal Events

Date Code Title Description
ST Notification of lapse