GB678695A - Improvements in or relating to ionisation manometers - Google Patents

Improvements in or relating to ionisation manometers

Info

Publication number
GB678695A
GB678695A GB9269/51A GB926951A GB678695A GB 678695 A GB678695 A GB 678695A GB 9269/51 A GB9269/51 A GB 9269/51A GB 926951 A GB926951 A GB 926951A GB 678695 A GB678695 A GB 678695A
Authority
GB
United Kingdom
Prior art keywords
tube
cathode
electrons
degree
apertured
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
GB9269/51A
Inventor
Arnold Hugh William Beck
Alan Butler Cutting
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB9269/51A priority Critical patent/GB678695A/en
Priority to US278466A priority patent/US2817030A/en
Publication of GB678695A publication Critical patent/GB678695A/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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L21/00—Vacuum gauges

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Fluid Pressure (AREA)
  • Measurement Of Radiation (AREA)
  • Electron Tubes For Measurement (AREA)

Abstract

678,695. Electric tests. STANDARD TELEPHONES & CABLES, Ltd. April 20, 1951, No. 9269/51. Class 37. [Also in Group XL (a)] Apparatus for determining the degree of vacuum in a low pressure system comprises a cold-cathode ionization chamber in which the degree of ionization of the residual gas is increased before being measured. The ionization chamber is adapted for use with a magnetic field which causes the electrons to follow helicoidal paths and thus increases the probability of an ionizing collision, and comprises a cathode 8 surrounding an elongated anode 12 and provided intermediate its ends with protrusions, such as apertured baffle plates 11, which provide field emission surfaces while at the same time dividing the anode-cathode space into separate chambers within which the electrons may travel freely with an axial component of velocity. The electrodes are supported by mica discs 9, 10, which are apertured so as to present a small resistance to flow of gas through the tube which method may be used instead of single connection to tube 6. Dimensions and working data are given for a tube measuring pressures in the range 10<SP>-3</SP> to 10<SP>-7</SP> mm.
GB9269/51A 1951-04-20 1951-04-20 Improvements in or relating to ionisation manometers Expired GB678695A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB9269/51A GB678695A (en) 1951-04-20 1951-04-20 Improvements in or relating to ionisation manometers
US278466A US2817030A (en) 1951-04-20 1952-03-25 Ionisation manometers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9269/51A GB678695A (en) 1951-04-20 1951-04-20 Improvements in or relating to ionisation manometers

Publications (1)

Publication Number Publication Date
GB678695A true GB678695A (en) 1952-09-03

Family

ID=9868723

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9269/51A Expired GB678695A (en) 1951-04-20 1951-04-20 Improvements in or relating to ionisation manometers

Country Status (2)

Country Link
US (1) US2817030A (en)
GB (1) GB678695A (en)

Cited By (2)

* 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
GB2256310A (en) * 1991-05-31 1992-12-02 Boc Group Plc A vacuum gauge

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2946952A (en) * 1957-09-30 1960-07-26 Pure Oil Co Electron tube apparatus for detection of atomic hydrogen
US2884550A (en) * 1957-10-17 1959-04-28 Gen Electric Ionization gauges and method of operation thereof
US3171081A (en) * 1962-02-19 1965-02-23 Donald C Garwood Ionization vacuum gauge
US3343781A (en) * 1965-04-28 1967-09-26 Gen Electric Ionic pump
US3399341A (en) * 1965-05-24 1968-08-27 United Aircraft Corp Vacuum pressure measurement apparatus utlizing hollow cathode discharge

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1004012A (en) * 1911-01-07 1911-09-26 Siemens Ag Current-relaying apparatus.
US2397071A (en) * 1941-09-27 1946-03-19 Texas Co Radiation detector
GB555134A (en) * 1942-02-03 1943-08-05 Otto Ernst Heinrich Klemperer Improvements in or relating to apparatus for measuring low gas pressure
US2425533A (en) * 1945-11-21 1947-08-12 Texas Co Device for measuring wall thickness
US2457781A (en) * 1948-01-02 1948-12-28 Sylvania Electric Prod Ray counter
US2516704A (en) * 1949-06-11 1950-07-25 Collins Radio Co Vacuum gauge of the ionization producing type

Cited By (2)

* 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
GB2256310A (en) * 1991-05-31 1992-12-02 Boc Group Plc A vacuum gauge

Also Published As

Publication number Publication date
US2817030A (en) 1957-12-17

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