GB855111A - Improvements in or relating to devices for the determination of changes in the composition of gases - Google Patents

Improvements in or relating to devices for the determination of changes in the composition of gases

Info

Publication number
GB855111A
GB855111A GB919359A GB919359A GB855111A GB 855111 A GB855111 A GB 855111A GB 919359 A GB919359 A GB 919359A GB 919359 A GB919359 A GB 919359A GB 855111 A GB855111 A GB 855111A
Authority
GB
United Kingdom
Prior art keywords
electrode
disc
chamber
secured
ionization
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
GB919359A
Inventor
Ernst Meili
Heinrich Derfler
Thomas Lampart
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.)
CERBERUS GmbH
Original Assignee
CERBERUS GmbH
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 CERBERUS GmbH filed Critical CERBERUS GmbH
Priority to GB919359A priority Critical patent/GB855111A/en
Publication of GB855111A publication Critical patent/GB855111A/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
    • G08B17/113—Constructional details

Landscapes

  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Electrochemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Fire-Detection Mechanisms (AREA)

Abstract

855,111. Cold cathode tubes; ionization chambers. CERBERUS G.m.b.H. March 17, 1959, No. 9193/59. Class 39(1). In a device for determining changes in the composition of a gas, e.g. a fire alarm operating on the changed aerosol content of air due to combustion as described in Specification 854,594, in which the electric centre point of a series connection between two ionization chambers, one closed and the other open and each containing radioactive material, is connected to the control electrode of a relay tube, a reliable connection is obtained by connecting the control electrode and an electrode of each of the ionization chambers to a metallic disc closing one end of the relay tube envelope. In the embodiment shown the glass envelope 15 of a relay tube 14 comprising a cathode 17, anode 18 and control electrode 20 is secured by a layer of putty 16 to a metal cup 12 attached to the base 10 of the device, and is closed at one end by a metal disc 19. A plate 23, forming with a housing 28 carrying radioactive material 40 the outer electrode of an ionization chamber 24, is secured by rivets 25 to the disc 19. The inner electrode 32 is supported by pins 30 (one shown) embedded in the base 10. A pin 26 secured to the plate 23 has a threaded portion 27 carrying a pin 34 forming the inner electrode of an ionization chamber 35 the outer electrode of which is formed by a perforated portion of a jacket 36 attached to the base 10. Radioactive material 38 is provided on a shoulder 42 of a wall 41 of the chamber 35. The disc 19 may alternatively be designed as part of the chamber 24 to dispense with the riveted connection 25. In a further alternative embodiment, Fig. 3 (not shown) the aperture in the wall 41 surrounding the electrode 34 is sealed by an insulating disc of water-repellent material, and the jacket 36 is made in two detachable parts.
GB919359A 1959-03-17 1959-03-17 Improvements in or relating to devices for the determination of changes in the composition of gases Expired GB855111A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB919359A GB855111A (en) 1959-03-17 1959-03-17 Improvements in or relating to devices for the determination of changes in the composition of gases

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB919359A GB855111A (en) 1959-03-17 1959-03-17 Improvements in or relating to devices for the determination of changes in the composition of gases

Publications (1)

Publication Number Publication Date
GB855111A true GB855111A (en) 1960-11-30

Family

ID=9867198

Family Applications (1)

Application Number Title Priority Date Filing Date
GB919359A Expired GB855111A (en) 1959-03-17 1959-03-17 Improvements in or relating to devices for the determination of changes in the composition of gases

Country Status (1)

Country Link
GB (1) GB855111A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3346754A (en) * 1964-03-26 1967-10-10 Trilobe Coupling Corp Mounting assembly for radiation detector tubes of various sizes and sensitivities toradiation

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3346754A (en) * 1964-03-26 1967-10-10 Trilobe Coupling Corp Mounting assembly for radiation detector tubes of various sizes and sensitivities toradiation

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