GB657548A - Improvements in or relating to devices for testing gases - Google Patents

Improvements in or relating to devices for testing gases

Info

Publication number
GB657548A
GB657548A GB3299947A GB3299947A GB657548A GB 657548 A GB657548 A GB 657548A GB 3299947 A GB3299947 A GB 3299947A GB 3299947 A GB3299947 A GB 3299947A GB 657548 A GB657548 A GB 657548A
Authority
GB
United Kingdom
Prior art keywords
space
electrode
gases
electrodes
relating
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
GB3299947A
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.)
GERALD IVOR HITCHCOX
ELECTRONIC INSTRUMENTS Ltd
Original Assignee
GERALD IVOR HITCHCOX
ELECTRONIC INSTRUMENTS Ltd
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 GERALD IVOR HITCHCOX, ELECTRONIC INSTRUMENTS Ltd filed Critical GERALD IVOR HITCHCOX
Priority to GB3299947A priority Critical patent/GB657548A/en
Publication of GB657548A publication Critical patent/GB657548A/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
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
    • G01N27/64—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber
    • G01N27/66—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using wave or particle radiation to ionise a gas, e.g. in an ionisation chamber and measuring current or voltage
    • 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
    • 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

Abstract

657,548. Detecting smoke in gases. ELECTRONIC INSTRUMENTS, Ltd., HITCHCOX, G. I., and TAYLOR, G. R. Dec. 15, 1947, No. 32999. [Class 47 (i)] Apparatus for testing gases comprises an open ionisation space 1 subjected to radio-active rays from a source 2 and provided with two electrodes 3, 4 connected in a bridge circuit with resistances 11, 12 and a closed ionisation space 13 with electrodes 15, 16 or a resistance, with a thermionic valve 8 to detect changes in the space 1 and so operate an alarm or indicator relay 10. In a modification, Fig. 3, the space 1 comprises an open container 18 which forms one electrode. The other electrode comprises a closed inner container 17 which forms the space 13 and within which is a further electrode 19.
GB3299947A 1947-12-15 1947-12-15 Improvements in or relating to devices for testing gases Expired GB657548A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3299947A GB657548A (en) 1947-12-15 1947-12-15 Improvements in or relating to devices for testing gases

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3299947A GB657548A (en) 1947-12-15 1947-12-15 Improvements in or relating to devices for testing gases

Publications (1)

Publication Number Publication Date
GB657548A true GB657548A (en) 1951-09-19

Family

ID=10347161

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3299947A Expired GB657548A (en) 1947-12-15 1947-12-15 Improvements in or relating to devices for testing gases

Country Status (1)

Country Link
GB (1) GB657548A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1089193B (en) * 1957-10-24 1960-09-15 Francais Detection Eletr Gas analysis and gas warning device and ionization chamber for this device
US2968730A (en) * 1957-12-05 1961-01-17 Mine Safety Appliances Co Method and apparatus for detecting minute concentrations of gases and vapors
DE1900888A1 (en) * 1968-01-19 1969-09-04 Vigifeu Ionizing chamber, especially for fire detectors
FR2640384A1 (en) * 1988-12-13 1990-06-15 Morrison Co Ets IONIZATION COMBUSTION GAS DETECTOR

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1089193B (en) * 1957-10-24 1960-09-15 Francais Detection Eletr Gas analysis and gas warning device and ionization chamber for this device
US2968730A (en) * 1957-12-05 1961-01-17 Mine Safety Appliances Co Method and apparatus for detecting minute concentrations of gases and vapors
DE1900888A1 (en) * 1968-01-19 1969-09-04 Vigifeu Ionizing chamber, especially for fire detectors
FR2640384A1 (en) * 1988-12-13 1990-06-15 Morrison Co Ets IONIZATION COMBUSTION GAS DETECTOR
WO1990007169A1 (en) * 1988-12-13 1990-06-28 Etablissements Morrison & Co Ionization-type combustion gas detector

Similar Documents

Publication Publication Date Title
US4595914A (en) Self-testing combustion products detector
SE309180B (en)
GB854594A (en) Process and device for the electrical detection of aerosols in gases
ES460665A1 (en) Current measuring system
GB657548A (en) Improvements in or relating to devices for testing gases
US3147465A (en) Methane alarm and control system
NL7601261A (en) LOW IMPEDANCE CIRCUIT WITH IONIZATION SMOKE PROBES.
GB831692A (en) Improvements in or relating to the measurement of the electrical conductance of liquids
GB958076A (en) Improvements in gas detection
GB838189A (en) Apparatus for detecting the presence of organic gases and vapours
GB810062A (en) A device to detect smoke
GB549583A (en) Improvements in or relating to gas or vapour detectors for use in mines or other places
GB858193A (en) Improvements in or relating to electrical apparatus for the remote reading of meters
JPS51117815A (en) Input level indicator circuit
SU106932A2 (en) Ionization gas analyzer
FR2360881A1 (en) Ionic smoke detector with single radio active source - comprises central open measuring chamber with concentric peripheral reference chamber
GB683034A (en) Improvements relating to high tension testing devices
GB759381A (en) Improvements in or relating to thermometers
JPS527785A (en) Counter tube for measuring low-speed electrons
SU983594A1 (en) Device for measuring partial charges
GB987279A (en) Gas discharge detection apparatus
GB601541A (en) Improvements relating to electrical remote indicating or repeating systems
GB760551A (en) ph-measuring device
JPS51138486A (en) Temperature detecting circuit
JPS5786747A (en) Measuring method for humidity and dew condensation