GB2015175A - Detector for Combustible Gases - Google Patents
Detector for Combustible GasesInfo
- Publication number
- GB2015175A GB2015175A GB7906419A GB7906419A GB2015175A GB 2015175 A GB2015175 A GB 2015175A GB 7906419 A GB7906419 A GB 7906419A GB 7906419 A GB7906419 A GB 7906419A GB 2015175 A GB2015175 A GB 2015175A
- Authority
- GB
- United Kingdom
- Prior art keywords
- detector
- combustible gases
- quasibridge
- impedance
- deposit
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/14—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature
- G01N27/16—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of an electrically-heated body in dependence upon change of temperature caused by burning or catalytic oxidation of surrounding material to be tested, e.g. of gas
-
- 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
- G08B17/117—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means by using a detection device for specific gases, e.g. combustion products, produced by the fire
Landscapes
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- Electrochemistry (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
A detector for combustible gases comprising a quasibridge circuit including first and second resistant thermometer elements one of which has a layer or deposit of a catalytic material connected to a negative feedback amplifier such that the impedance between the amplifier output and earth is substantially zero. <IMAGE>
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7906419A GB2015175B (en) | 1977-11-24 | 1979-02-23 | Detector for combustible gases |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4901477 | 1977-11-24 | ||
GB7906419A GB2015175B (en) | 1977-11-24 | 1979-02-23 | Detector for combustible gases |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2015175A true GB2015175A (en) | 1979-09-05 |
GB2015175B GB2015175B (en) | 1982-08-04 |
Family
ID=26266378
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7906419A Expired GB2015175B (en) | 1977-11-24 | 1979-02-23 | Detector for combustible gases |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2015175B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0068178A1 (en) * | 1981-06-11 | 1983-01-05 | Nissan Motor Co., Ltd. | Temperature control system |
GB2198845A (en) * | 1986-07-17 | 1988-06-22 | Atomic Energy Authority Uk | Sensing |
-
1979
- 1979-02-23 GB GB7906419A patent/GB2015175B/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0068178A1 (en) * | 1981-06-11 | 1983-01-05 | Nissan Motor Co., Ltd. | Temperature control system |
US4471648A (en) * | 1981-06-11 | 1984-09-18 | Nissan Motor Company | Temperature control system |
GB2198845A (en) * | 1986-07-17 | 1988-06-22 | Atomic Energy Authority Uk | Sensing |
Also Published As
Publication number | Publication date |
---|---|
GB2015175B (en) | 1982-08-04 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |