GB638178A - Improvements relating to apparatus for measuring low gas pressure - Google Patents

Improvements relating to apparatus for measuring low gas pressure

Info

Publication number
GB638178A
GB638178A GB2315447A GB2315447A GB638178A GB 638178 A GB638178 A GB 638178A GB 2315447 A GB2315447 A GB 2315447A GB 2315447 A GB2315447 A GB 2315447A GB 638178 A GB638178 A GB 638178A
Authority
GB
United Kingdom
Prior art keywords
cathode
envelope
gas pressure
low gas
anode
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
GB2315447A
Inventor
Donald Anthony Gifford Broad
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB2315447A priority Critical patent/GB638178A/en
Publication of GB638178A publication Critical patent/GB638178A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J41/00—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas; Discharge tubes for evacuation by diffusion of ions
    • H01J41/02—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas
    • H01J41/06—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas with ionisation by means of cold cathodes

Landscapes

  • Measuring Fluid Pressure (AREA)

Abstract

638,178. Determining physical qualities of materials. ELECTRIC & MUSICAL INDUSTRIES, Ltd. Aug. 21, 1947, No. 23154. [Class 37] [Also in Group XL (a)] In apparatus for measuring low gas pressure by measuring the current between two electrodes in the gas, the electron path being made long by an applied magnetic field, the anode 7 consists of a rod projecting through a closed end 2 of a cylindrical cathode 1 whose other end is open and projects beyond the anode, and is surrounded by a solenoid 8. The cathode may be provided with a glass envelope 9, or may consist of a metal deposit on the interior of the envelope 9. The open end of the envelope 9, or the cathode 1, is sealed to the vessel 18 containing the gas (Fig. 3) and the potential difference across the discharge space is measured with a constant applied voltage between electrodes. Additional electrostatic shielding may be provided by a metalgauze disc in the open end of the cathode. Specifications 474,845 and 555,134 are referred to.
GB2315447A 1947-08-21 1947-08-21 Improvements relating to apparatus for measuring low gas pressure Expired GB638178A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2315447A GB638178A (en) 1947-08-21 1947-08-21 Improvements relating to apparatus for measuring low gas pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2315447A GB638178A (en) 1947-08-21 1947-08-21 Improvements relating to apparatus for measuring low gas pressure

Publications (1)

Publication Number Publication Date
GB638178A true GB638178A (en) 1950-05-31

Family

ID=10191039

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2315447A Expired GB638178A (en) 1947-08-21 1947-08-21 Improvements relating to apparatus for measuring low gas pressure

Country Status (1)

Country Link
GB (1) GB638178A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1044446B (en) * 1955-06-02 1958-11-20 Heraeus Gmbh W C Ionization manometer with cold cathode
EP0622621A2 (en) * 1993-04-28 1994-11-02 The Fredericks Company Opposed magnet ionization gauge
WO2018111684A1 (en) * 2016-12-13 2018-06-21 Mks Instruments, Inc. Anode electrode shield for inverted magnetron cold cathode ionization gauge

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1044446B (en) * 1955-06-02 1958-11-20 Heraeus Gmbh W C Ionization manometer with cold cathode
EP0622621A2 (en) * 1993-04-28 1994-11-02 The Fredericks Company Opposed magnet ionization gauge
EP0622621A3 (en) * 1993-04-28 1995-03-29 Fredericks Co Opposed magnet ionization gauge.
WO2018111684A1 (en) * 2016-12-13 2018-06-21 Mks Instruments, Inc. Anode electrode shield for inverted magnetron cold cathode ionization gauge
CN110192265A (en) * 2016-12-13 2019-08-30 万机仪器公司 Anode electrode shielding part for inverted magnetron Cold-cathode ionization gage
US10969290B2 (en) 2016-12-13 2021-04-06 Mks Instruments, Inc. Anode electrode shield for inverted magnetron cold cathode ionization gauge
CN110192265B (en) * 2016-12-13 2021-10-08 万机仪器公司 Anode electrode shield for inverted magnetron cold cathode ionization gauge

Similar Documents

Publication Publication Date Title
GB854594A (en) Process and device for the electrical detection of aerosols in gases
US3018376A (en) Gas density measurement
US3575656A (en) Method and apparatus for measuring pressure in vacuum interrupters
GB638178A (en) Improvements relating to apparatus for measuring low gas pressure
US2490468A (en) Vacuum gauge structure
GB520187A (en) Improvements in or relating to cathode ray tubes and electrode arrangements therefor
GB728114A (en) Improvements in and relating to electrical vapour detectors
US2899605A (en) Warmoltz
US2774936A (en) Ionisation manometers
GB780828A (en) Improvements in or relating to electric glow discharge apparatus for measuring low gas-pressures
US3399341A (en) Vacuum pressure measurement apparatus utlizing hollow cathode discharge
GB191318827A (en) Improvements in Apparatus for Measuring Ionisation of Gases.
GB956970A (en) Glow discharge device
US3341770A (en) Ionization vacuum gauge
GB690159A (en) Improvements relating to radiation detectors
SU637749A1 (en) Magnetic discharge pressure gauge
Cockroft et al. The Properties of Proportional Tubes and Ion Chambers with Glass Envelopes and External Graphite Electrodes
GB910072A (en) Improvements in or relating to ionisation manometers
US2913630A (en) Ion gauge
Ives On the Effect of a Transverse Magnetic Field on the Discharge Through a Geissler Tube
US3276836A (en) Process for upgrading vacuum tubes
SU447591A1 (en) Vacuum meter leak detector
SU1347026A2 (en) Gas-discharge transducer
GB735386A (en) Improvements in or relating to apparatus embodying means for detecting ions
GB771550A (en) Improvements in or relating to magnetically controlled electronic valves