FR1511369A - Smoke detector and its alarm circuit - Google Patents

Smoke detector and its alarm circuit

Info

Publication number
FR1511369A
FR1511369A FR94852A FR94852A FR1511369A FR 1511369 A FR1511369 A FR 1511369A FR 94852 A FR94852 A FR 94852A FR 94852 A FR94852 A FR 94852A FR 1511369 A FR1511369 A FR 1511369A
Authority
FR
France
Prior art keywords
smoke detector
alarm circuit
alarm
circuit
smoke
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.)
Expired
Application number
FR94852A
Other languages
French (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.)
Pyrotector Inc
Original Assignee
Pyrotector Inc
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 Pyrotector Inc filed Critical Pyrotector Inc
Application granted granted Critical
Publication of FR1511369A publication Critical patent/FR1511369A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid
    • G01N21/53—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Warehouses Or Storage Devices (AREA)
FR94852A 1966-03-10 1967-02-14 Smoke detector and its alarm circuit Expired FR1511369A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US53314066A 1966-03-10 1966-03-10
US84564669A 1969-07-08 1969-07-08

Publications (1)

Publication Number Publication Date
FR1511369A true FR1511369A (en) 1968-01-26

Family

ID=27064074

Family Applications (1)

Application Number Title Priority Date Filing Date
FR94852A Expired FR1511369A (en) 1966-03-10 1967-02-14 Smoke detector and its alarm circuit

Country Status (11)

Country Link
US (1) US3579216A (en)
BE (1) BE693688A (en)
CH (1) CH459611A (en)
DE (1) DE1588617B1 (en)
DK (1) DK116228B (en)
FR (1) FR1511369A (en)
GB (1) GB1160149A (en)
IL (1) IL27293A (en)
NL (1) NL6702484A (en)
NO (1) NO120872B (en)
SE (1) SE328807B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3710367A (en) * 1970-10-28 1973-01-09 Gen Motors Corp Lamp failure indicator for a dual-filament lamp
JP4395627B2 (en) * 2007-03-19 2010-01-13 ホーコス株式会社 Mist measuring device
CN115326790B (en) * 2022-08-22 2024-04-12 东北大学秦皇岛分校 Photocurrent and single photon detection device and method

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2032746A (en) * 1928-10-26 1936-03-03 Kidde & Co Walter Detection of suspended matter in fluids
US1877279A (en) * 1930-05-20 1932-09-13 Westinghouse Electric & Mfg Co Photosensitive device
US2033466A (en) * 1931-11-11 1936-03-10 Kidde & Co Walter Selective smoke detector
US2278920A (en) * 1939-03-15 1942-04-07 American District Telegraph Co Photoelectric smoke detection system
US2668284A (en) * 1950-02-28 1954-02-02 Specialties Dev Corp Apparatus for detecting suspended matter in fluids
DE928088C (en) * 1952-11-28 1955-05-23 Standard Elek Zitaets Ges Ag Quiescent current monitored signal system according to the loop system
NL224947A (en) * 1957-02-19
US3202883A (en) * 1961-06-07 1965-08-24 Graviner Manufacturing Co Electrical circuits particularly for use with temperature detectors
US3207932A (en) * 1961-11-20 1965-09-21 Basic Electronic Controls Inc Switching device and circuit for radiation sensing apparatus
US3226703A (en) * 1962-11-19 1965-12-28 Sam M Finkle Fire detecting device

Also Published As

Publication number Publication date
SE328807B (en) 1970-09-21
NO120872B (en) 1970-12-14
US3579216A (en) 1971-05-18
GB1160149A (en) 1969-07-30
NL6702484A (en) 1967-09-11
IL27293A (en) 1971-03-24
BE693688A (en) 1967-07-17
CH459611A (en) 1968-07-15
DE1588617B1 (en) 1972-05-31
DK116228B (en) 1969-12-22

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