GB544831A - Improvements in thermionic cathode controlled arc discharge devices - Google Patents

Improvements in thermionic cathode controlled arc discharge devices

Info

Publication number
GB544831A
GB544831A GB144641A GB144641A GB544831A GB 544831 A GB544831 A GB 544831A GB 144641 A GB144641 A GB 144641A GB 144641 A GB144641 A GB 144641A GB 544831 A GB544831 A GB 544831A
Authority
GB
United Kingdom
Prior art keywords
cathode
discharge
anode
baffle
auxiliary
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
GB144641A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Priority to GB144641A priority Critical patent/GB544831A/en
Publication of GB544831A publication Critical patent/GB544831A/en
Priority to FR945110D priority patent/FR945110A/en
Priority to DE1950B0009765 priority patent/DE829192C/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J17/00—Gas-filled discharge tubes with solid cathode
    • H01J17/50—Thermionic-cathode tubes
    • H01J17/52—Thermionic-cathode tubes with one cathode and one anode
    • H01J17/54—Thermionic-cathode tubes with one cathode and one anode having one or more control electrodes
    • H01J17/56—Thermionic-cathode tubes with one cathode and one anode having one or more control electrodes for preventing and then permitting ignition, but thereafter having no control

Landscapes

  • Discharge Heating (AREA)
  • X-Ray Techniques (AREA)
  • Physical Vapour Deposition (AREA)
  • Electron Sources, Ion Sources (AREA)

Abstract

544,831. Metal-vapour apparatus. BRITISH THOMSON-HOUSTON CO., Ltd., and KNIGHT, H. DE B. Feb. 4, 1941, No. 1446. [Class 39 (i)] In thermionic cathode controlled arc discharge devices, the control grid is associated with an auxiliary anode, and the main anode is screened from the cathode so that the discharge thereto occurs only when the auxiliary discharge is started. As shown, the anode 1 and cathode 2 are enclosed in a tubular screen 7, and a baffle 8, which may be such as is described in Specifications 413,125 and 444;362, is interposed between the anode and cathode. The biasing potential applied to the screen and baffle is such that the main discharge is prevented at all voltages within the range of the device, in the absence of the auxiliary discharge. The latter is supplied by an auxiliary anode 9 and a control grid 11 which is disposed opposite an aperture 10 in the screen 7 and on the cathode side of the baffle. The cathode is an enclosure 6 internally coated with strontium or barium oxide, heated by an element 5 and may be of the shielded type described in Specification 308,447, [Class 39 (i)]. In a modified form of the device, the cathode is a directly heated, filament, surrounded by an open-ended cylinder, and the baffle is an imperforate disc disposed over the open end of the cylinder and transversely across the main discharge path. The discharge takes place around the edge of the disc, and the auxiliary anode and grid are disposed adjacent the discharge path. Specification 445,593 also is referred to.
GB144641A 1941-02-04 1941-02-04 Improvements in thermionic cathode controlled arc discharge devices Expired GB544831A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB144641A GB544831A (en) 1941-02-04 1941-02-04 Improvements in thermionic cathode controlled arc discharge devices
FR945110D FR945110A (en) 1941-02-04 1947-04-16 Improvements to thermionic cathode devices
DE1950B0009765 DE829192C (en) 1941-02-04 1950-09-15 Controlled arc discharge device with heating cathode

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB144641A GB544831A (en) 1941-02-04 1941-02-04 Improvements in thermionic cathode controlled arc discharge devices

Publications (1)

Publication Number Publication Date
GB544831A true GB544831A (en) 1942-04-29

Family

ID=9722142

Family Applications (1)

Application Number Title Priority Date Filing Date
GB144641A Expired GB544831A (en) 1941-02-04 1941-02-04 Improvements in thermionic cathode controlled arc discharge devices

Country Status (3)

Country Link
DE (1) DE829192C (en)
FR (1) FR945110A (en)
GB (1) GB544831A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2514165A (en) * 1942-11-23 1950-07-04 M O Valve Co Ltd Thermionic gas-filled rectifier

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2792527A (en) * 1952-11-21 1957-05-14 Rca Corp Gas discharge device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2514165A (en) * 1942-11-23 1950-07-04 M O Valve Co Ltd Thermionic gas-filled rectifier

Also Published As

Publication number Publication date
FR945110A (en) 1949-04-26
DE829192C (en) 1952-01-24

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