Global Patent Index - EP 0968519 A2

EP 0968519 A2 2000-01-05 - IONIZATION CHAMBER FOR RADIOMETRIC MEASURING INSTRUMENTS

Title (en)

IONIZATION CHAMBER FOR RADIOMETRIC MEASURING INSTRUMENTS

Title (de)

IONISATIONSKAMMER FÜR RADIOMETRISCHE MESSEINRICHTUNGEN

Title (fr)

CHAMBRE D'IONISATION POUR INSTRUMENTS DE MESURE RADIOMETRIQUES

Publication

EP 0968519 A2 (DE)

Application

EP 98925415 A

Priority

  • DE 9800818 W
  • DE 19712032 A
  • DE 19731608 A

Abstract (en)

[origin: WO9843116A2] The invention relates to an ionization chamber for radiometric measuring instruments, specially for transversal surface measurement systems, comprising a housing with filling gas therein, having at least one radiation input window and a plurality of collector electrodes in the housing with insulated, outward leading electrical connections, whereby an electrical potential difference (voltage) exists between the housing and the collector electrodes. The inventive device enables an ionization chamber for radiometric measuring instruments to be created, specially for transversal surface measurement systems. Said chamber is sufficiently sensitive and meets the usual high requirements of ionization chambers with regard to vacuum-tightness, base current and temperature dependency. This is achieved by subdividing a plurality of adjacent and mutually defining sections (2) inside the housing (3) with the respective collector electrodes (6), by connecting the collector electrodes (6) to electrical connections (14) which are guided outwards through the insulator (13; 17) of a gas-tight multiple through-passage, and by providing the insulator (13; 17) with an electrically conductive area encompassing all the electrical connections (14). Said area is electrically insulated from the housing (3) and from the connections (14). However, it lies within the electrode potential when in a state devoid of electricity.

IPC 1-7 (main, further and additional classification)

H01J 47/02

IPC 8 full level (invention and additional information)

H01J 47/02 (2006.01)

CPC (invention and additional information)

H01J 47/02 (2013.01)

Citation (search report)

See references of WO 9843116A3

Designated contracting state (EPC)

DE FI FR GB IT SE

EPO simple patent family

WO 9843116 A2 19981001; WO 9843116 A3 19981217; EP 0968519 A2 20000105; EP 0968519 B1 20030521; JP 2002507311 A 20020305; US 6278121 B1 20010821

INPADOC legal status


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2003-06-26 [REF] CORRESPONDS TO:

- Document: DE 59808464 P 20030626

2003-05-21 [AK] DESIGNATED CONTRACTING STATES:

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2003-05-21 [REG GB FG4D] EUROPEAN PATENT GRANTED

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2002-09-11 [RIN1] INVENTOR (CORRECTION)

- Inventor name: LAUBE, SIEGFRIED

2002-09-11 [RIN1] INVENTOR (CORRECTION)

- Inventor name: URBAN, FRANZ-JOSEF

2002-09-11 [RIN1] INVENTOR (CORRECTION)

- Inventor name: HILDEBRANDT, STEFFEN

2002-07-24 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20020612

2000-01-05 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19990730

2000-01-05 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A2

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