GB816901A - Ionization manometer - Google Patents

Ionization manometer

Info

Publication number
GB816901A
GB816901A GB38330/57A GB3833057A GB816901A GB 816901 A GB816901 A GB 816901A GB 38330/57 A GB38330/57 A GB 38330/57A GB 3833057 A GB3833057 A GB 3833057A GB 816901 A GB816901 A GB 816901A
Authority
GB
United Kingdom
Prior art keywords
grid
collector
cathode
wire
voltage source
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
GB38330/57A
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.)
MANFRED MOTTHIAS DUNKEL
Original Assignee
MANFRED MOTTHIAS DUNKEL
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 MANFRED MOTTHIAS DUNKEL filed Critical MANFRED MOTTHIAS DUNKEL
Publication of GB816901A publication Critical patent/GB816901A/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
    • H01J41/04—Discharge tubes for measuring pressure of introduced gas or for detecting presence of gas with ionisation by means of thermionic cathodes

Abstract

816,901. Thermionic-cathode tubes. DUNKEL, M. M. Dec. 10, 1957 [Dec. 31, 1956], No. 38330/57. Class 39(1). An ionisation manometer is connected to an evacuated system by a ground joint 11 and comprises a circular screen electrode 32 outside and concentric with a circular wire cathode 31, a cylindrical grid 23-30 and a straight wire collector electrode 21. The grid comprises a plurality of coiled wires 25-30 extending between two rings 23, 24 connected to, and supported by leads 15, 16. The cathode is heated by a voltage source 40 and the grid is maintained at a positive potential by voltage source 41 so that some electrons are accelerated into the space between the grid and collector and produce positive ions which drift towards the collector which is maintained at a negative potential by voltage source 42. This ion current is measured by a meter 43 and indicates the gas pressure. The screen, grid and collector may be freed of occluded gas by heating them by means of transformers 34, 35, 33. The coiled wire 25-30 may be replaced by straight wires, and the screen electrode may comprise two circular wires on opposite sides of and equidistant to the cathode wire. All the electrodes are preferably made of heat resistant material such as tungsten, molybdenum or tantalum.
GB38330/57A 1956-12-31 1957-12-10 Ionization manometer Expired GB816901A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE355309X 1956-12-31

Publications (1)

Publication Number Publication Date
GB816901A true GB816901A (en) 1959-07-22

Family

ID=6289935

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38330/57A Expired GB816901A (en) 1956-12-31 1957-12-10 Ionization manometer

Country Status (3)

Country Link
US (1) US2870358A (en)
CH (1) CH355309A (en)
GB (1) GB816901A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1130619B (en) * 1960-06-03 1962-05-30 Leybolds Nachfolger E Ionization manometer system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001128A (en) * 1958-08-27 1961-09-19 Nat Res Corp Measuring
US3243649A (en) * 1962-08-14 1966-03-29 Gca Corp Hot filament ionization gauge
US3319117A (en) * 1964-03-24 1967-05-09 Varian Associates Ionization vacuum gauge for use in the 10-6 to 1 torr range
US3514655A (en) * 1968-04-18 1970-05-26 Matsushita Electric Ind Co Ltd Ion gauge for monitoring vapor flow

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1130619B (en) * 1960-06-03 1962-05-30 Leybolds Nachfolger E Ionization manometer system

Also Published As

Publication number Publication date
CH355309A (en) 1961-06-30
US2870358A (en) 1959-01-20

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