NL14479C - - Google Patents

Info

Publication number
NL14479C
NL14479C NL20701A NL20701A NL14479C NL 14479 C NL14479 C NL 14479C NL 20701 A NL20701 A NL 20701A NL 20701 A NL20701 A NL 20701A NL 14479 C NL14479 C NL 14479C
Authority
NL
Netherlands
Application number
NL20701A
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 to US480967A priority Critical patent/US1516608A/en
Priority to GB28341/21A priority patent/GB191856A/en
Application filed filed Critical
Priority to NL20701A priority patent/NL14479C/xx
Priority to FR542978D priority patent/FR542978A/fr
Priority to DEK79789D priority patent/DE394973C/de
Application granted granted Critical
Publication of NL14479C publication Critical patent/NL14479C/xx

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
    • 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
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/29—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using visual detection
    • 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
    • G08B17/11—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means using an ionisation chamber for detecting smoke or gas
    • G08B17/113—Constructional details

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Fire-Detection Mechanisms (AREA)
NL20701A 1921-06-28 1921-11-01 NL14479C (xx)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US480967A US1516608A (en) 1921-06-28 1921-06-28 Detection of suspended matter in gases
GB28341/21A GB191856A (en) 1921-06-28 1921-10-25 An improved system for the detection of smoke, or fine particles carried in suspension in a gas or vapour
NL20701A NL14479C (xx) 1921-06-28 1921-11-01
FR542978D FR542978A (fr) 1921-06-28 1921-11-02 Perfectionnements aux appareils avertisseurs et extincteurs d'incendie
DEK79789D DE394973C (de) 1921-06-28 1921-11-06 Vorrichtung zur Ermittlung von Rauch oder fein verteilten Koerpern in Gasen oder Daempfen

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US480967A US1516608A (en) 1921-06-28 1921-06-28 Detection of suspended matter in gases
GB28341/21A GB191856A (en) 1921-06-28 1921-10-25 An improved system for the detection of smoke, or fine particles carried in suspension in a gas or vapour
NL20701A NL14479C (xx) 1921-06-28 1921-11-01
FR542978T 1921-11-02
DEK79789D DE394973C (de) 1921-06-28 1921-11-06 Vorrichtung zur Ermittlung von Rauch oder fein verteilten Koerpern in Gasen oder Daempfen

Publications (1)

Publication Number Publication Date
NL14479C true NL14479C (xx) 1926-04-15

Family

ID=10274140

Family Applications (1)

Application Number Title Priority Date Filing Date
NL20701A NL14479C (xx) 1921-06-28 1921-11-01

Country Status (5)

Country Link
US (1) US1516608A (xx)
DE (1) DE394973C (xx)
FR (1) FR542978A (xx)
GB (1) GB191856A (xx)
NL (1) NL14479C (xx)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2549866A (en) * 1944-12-23 1951-04-24 Specialties Dev Corp Apparatus for visual detection of illuminated suspended matter in fluids
US2770162A (en) * 1952-06-05 1956-11-13 Specialties Dev Corp Apparatus for visually detecting suspended matter in fluid
NL93083C (xx) * 1953-06-22
US4385830A (en) * 1980-11-26 1983-05-31 Cornell Research Foundation, Inc. Direct measurement of vorticity by optical probe
EP0302977A1 (en) * 1987-08-14 1989-02-15 Noguchi, Tokushige Device for detecting or viewing materials floating in fluids

Also Published As

Publication number Publication date
US1516608A (en) 1924-11-25
GB191856A (en) 1923-01-25
FR542978A (fr) 1922-08-24
DE394973C (de) 1924-05-13

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