DE179145C - - Google Patents
Info
- Publication number
- DE179145C DE179145C DENDAT179145D DE179145DA DE179145C DE 179145 C DE179145 C DE 179145C DE NDAT179145 D DENDAT179145 D DE NDAT179145D DE 179145D A DE179145D A DE 179145DA DE 179145 C DE179145 C DE 179145C
- Authority
- DE
- Germany
- Prior art keywords
- smoke
- strength
- selenium cell
- light source
- relay
- 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.)
- Active
Links
- 239000000779 smoke Substances 0.000 claims description 30
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 claims description 9
- 229910052711 selenium Inorganic materials 0.000 claims description 9
- 239000011669 selenium Substances 0.000 claims description 9
- 239000007789 gas Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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
- G01N21/534—Scattering, i.e. diffuse reflection within a body or fluid within a flowing fluid, e.g. smoke by measuring transmission alone, i.e. determining opacity
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)
- Length Measuring Devices By Optical Means (AREA)
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE179145C true DE179145C (Direct) |
Family
ID=443482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DENDAT179145D Active DE179145C (Direct) |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE179145C (Direct) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4460346A (en) * | 1980-05-30 | 1984-07-17 | General Steel Industries, Inc. | Eccentric shaft and method of manufacture |
-
0
- DE DENDAT179145D patent/DE179145C/de active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4460346A (en) * | 1980-05-30 | 1984-07-17 | General Steel Industries, Inc. | Eccentric shaft and method of manufacture |
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