GB1535314A - Vacuum gauges - Google Patents

Vacuum gauges

Info

Publication number
GB1535314A
GB1535314A GB507075A GB507075A GB1535314A GB 1535314 A GB1535314 A GB 1535314A GB 507075 A GB507075 A GB 507075A GB 507075 A GB507075 A GB 507075A GB 1535314 A GB1535314 A GB 1535314A
Authority
GB
United Kingdom
Prior art keywords
nickel
coating
radioactive
consist
discharge chamber
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
GB507075A
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.)
BOC Group Ltd
Original Assignee
BOC International 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 BOC International Ltd filed Critical BOC International Ltd
Priority to GB507075A priority Critical patent/GB1535314A/en
Priority to AU10888/76A priority patent/AU506039B2/en
Publication of GB1535314A publication Critical patent/GB1535314A/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
    • H01J41/08—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas with ionisation by means of radioactive substances, e.g. alphatrons

Landscapes

  • Measuring Fluid Pressure (AREA)

Abstract

1535314 Ionization manometers BOC INTERNATIONAL Ltd 14 April 1976 [6 Feb 1975] 5070/75 Heading HID A high-vacuum ionization gauge of the coldcathode Penning type comprises a source of charged particles situated inside the gauge but outside the discharge chamber 7 on the side remote from the inlet 31 for gas or vapour. The discharge chamber is defined by cylindrical cathode members 8 surrounding the end of an anode rod 16 which extends through a glass seal 26. A radioactive source may consist in a coating of thoria on a shield 28 protecting the glass seal 26, or it may consist of a wire made of the radioactive isotope of nickel arranged in an internal circumferential groove of the container 2. Such a wire may comprise a core of non-radioactive nickel with a coating of radionickel covered by a further coating of inert nickel.
GB507075A 1975-02-06 1975-02-06 Vacuum gauges Expired GB1535314A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB507075A GB1535314A (en) 1975-02-06 1975-02-06 Vacuum gauges
AU10888/76A AU506039B2 (en) 1975-02-06 1976-02-06 Cold cathode ionisation vacuum gauge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB507075A GB1535314A (en) 1975-02-06 1975-02-06 Vacuum gauges

Publications (1)

Publication Number Publication Date
GB1535314A true GB1535314A (en) 1978-12-13

Family

ID=9789199

Family Applications (1)

Application Number Title Priority Date Filing Date
GB507075A Expired GB1535314A (en) 1975-02-06 1975-02-06 Vacuum gauges

Country Status (2)

Country Link
AU (1) AU506039B2 (en)
GB (1) GB1535314A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5157333A (en) * 1991-03-12 1992-10-20 Mks Instruments, Inc. Discharge initiating means for cold cathode discharge ionization gauge
GB2256310A (en) * 1991-05-31 1992-12-02 Boc Group Plc A vacuum gauge
US5198772A (en) * 1991-03-12 1993-03-30 Mks Instruments, Inc. Removable discharge initiating means for cold cathode discharge ionization gauge
WO2004029572A1 (en) * 2002-09-19 2004-04-08 Otto-Von-Guericke-Universität Magdeburg Cold-cathode ionisation manometer having a longer service life due to two separate cathodes
EP1698878A1 (en) * 2005-03-04 2006-09-06 Inficon GmbH Electrode configuration and pressure measuring apparatus
WO2009063233A2 (en) 2007-11-12 2009-05-22 Edwards Limited Ionisation vacuum gauges and gauge heads
CN107407611A (en) * 2015-03-03 2017-11-28 株式会社爱发科 Triode type ion gauge

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5157333A (en) * 1991-03-12 1992-10-20 Mks Instruments, Inc. Discharge initiating means for cold cathode discharge ionization gauge
US5198772A (en) * 1991-03-12 1993-03-30 Mks Instruments, Inc. Removable discharge initiating means for cold cathode discharge ionization gauge
GB2256310A (en) * 1991-05-31 1992-12-02 Boc Group Plc A vacuum gauge
WO2004029572A1 (en) * 2002-09-19 2004-04-08 Otto-Von-Guericke-Universität Magdeburg Cold-cathode ionisation manometer having a longer service life due to two separate cathodes
US7173430B2 (en) 2002-09-19 2007-02-06 Otto-Von-Guericke Universitaet Magdeburg Cold-cathode ionization manometer having a longer service life due to two separate cathodes
EP1698878A1 (en) * 2005-03-04 2006-09-06 Inficon GmbH Electrode configuration and pressure measuring apparatus
WO2006094687A1 (en) * 2005-03-04 2006-09-14 Inficon Gmbh Vacuum measuring gauge
US7352187B2 (en) 2005-03-04 2008-04-01 Inficon Gmbh Vacuum measuring gauge
WO2009063233A2 (en) 2007-11-12 2009-05-22 Edwards Limited Ionisation vacuum gauges and gauge heads
CN107407611A (en) * 2015-03-03 2017-11-28 株式会社爱发科 Triode type ion gauge

Also Published As

Publication number Publication date
AU1088876A (en) 1977-08-11
AU506039B2 (en) 1979-12-13

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee