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
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)
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 (en) | 1921-06-28 | 1921-11-01 | |
| FR542978D FR542978A (en) | 1921-06-28 | 1921-11-02 | Improvements to warning devices and fire extinguishers |
| DEK79789D DE394973C (en) | 1921-06-28 | 1921-11-06 | Device for detecting smoke or finely divided bodies in gases or fumes |
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 (en) | 1921-06-28 | 1921-11-01 | |
| FR542978T | 1921-11-02 | ||
| DEK79789D DE394973C (en) | 1921-06-28 | 1921-11-06 | Device for detecting smoke or finely divided bodies in gases or fumes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NL14479C true NL14479C (en) | 1926-04-15 |
Family
ID=10274140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NL20701A NL14479C (en) | 1921-06-28 | 1921-11-01 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US1516608A (en) |
| DE (1) | DE394973C (en) |
| FR (1) | FR542978A (en) |
| GB (1) | GB191856A (en) |
| NL (1) | NL14479C (en) |
Families Citing this family (5)
| 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 (en) * | 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 |
-
1921
- 1921-06-28 US US480967A patent/US1516608A/en not_active Expired - Lifetime
- 1921-10-25 GB GB28341/21A patent/GB191856A/en not_active Expired
- 1921-11-01 NL NL20701A patent/NL14479C/xx active
- 1921-11-02 FR FR542978D patent/FR542978A/en not_active Expired
- 1921-11-06 DE DEK79789D patent/DE394973C/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US1516608A (en) | 1924-11-25 |
| GB191856A (en) | 1923-01-25 |
| FR542978A (en) | 1922-08-24 |
| DE394973C (en) | 1924-05-13 |