GB418027A - Improvements in and relating to gaseous electric discharge devices - Google Patents

Improvements in and relating to gaseous electric discharge devices

Info

Publication number
GB418027A
GB418027A GB18738/33A GB1873833A GB418027A GB 418027 A GB418027 A GB 418027A GB 18738/33 A GB18738/33 A GB 18738/33A GB 1873833 A GB1873833 A GB 1873833A GB 418027 A GB418027 A GB 418027A
Authority
GB
United Kingdom
Prior art keywords
tube
cathode
anode
barium
coated
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
GB18738/33A
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
Publication of GB418027A publication Critical patent/GB418027A/en
Expired legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14Circuit arrangements
    • H05B41/16Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies
    • H05B41/20Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch
    • H05B41/22Circuit arrangements in which the lamp is fed by dc or by low-frequency ac, e.g. by 50 cycles/sec ac, or with network frequencies having no starting switch for lamps having an auxiliary starting electrode

Landscapes

  • Ceramic Products (AREA)

Abstract

418,027. Discharge apparatus. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.- (Assignees of Foulke, T. E. ; 30, Evelyn Place, Nutley, New Jersey, U.S.A.) July 1, 1933, No. 18738. Convention date, July 1, 1932. [Class 39 (i).] A tube contains two main electrodes, one heated to emit electrons, an auxiliary anode adjacent the heated electrode, and a conductor extending from a point near the non- heated electrode to the auxiliary anode, to which it is connected. In one form, a tube 20 contains a cup-shaped anode 21 and a cathode 23 having a heater 24 and heatshields 25, 26, the inner surfaces of which, beyond the cathode are coated with powdered aluminium, or other material resisting activation by sputtered particles. A ring- shaped auxiliary anode 30 is mounted above the cathode on a shielded support 31 and is connected to a bariumcoated conductor 32 extending to a point near anode 21 and having a support 33. The filling may consist of neon, helium, argon, nitrogen, mercury or the like alone or in combination, for example neon with 0À2 per cent of argon at 2 to 4 mms. Specification 395,851 is referred, to. The Specification as open to inspection under Sect. 91 describes also a tube having a cylindrical cathode with an axial rod connected to it through a resistance and terminating near the anode, a tube for use with alternating-current having two such cathodes and auxiliary electrodes, and a tube as shown in the Figure with the member 32 spaced from the ring 30 and with another cathode similar to cathode 21 replacing anode 21. The cathode and the member 32 may in all cases be coated with barium azide which is reduced to barium in the induction furnace. The wire 32 is heated by means of an inductive discharge in the evolved gas, and the furnace is moved along as the gas is evolved, the tube being on the pump. The electrodes are left coated with barium cemented on by barium nitride and a little unreduced azide. Metallic caesium or other alkali metal may then be distilled on from a pellet. Alternatively the electrodes may be coated by the method described in Specification 411,669. The tube may be filled with neon and 0.01 to 1 per cent of argon at a pressure of 1-3 mm. This subject-matter does not appear in the Specification as accepted.
GB18738/33A 1932-07-01 1933-07-01 Improvements in and relating to gaseous electric discharge devices Expired GB418027A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US418027XA 1932-07-01 1932-07-01

Publications (1)

Publication Number Publication Date
GB418027A true GB418027A (en) 1934-10-17

Family

ID=21918395

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18738/33A Expired GB418027A (en) 1932-07-01 1933-07-01 Improvements in and relating to gaseous electric discharge devices

Country Status (1)

Country Link
GB (1) GB418027A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1015927B (en) * 1953-12-30 1957-09-19 Patra Patent Treuhand Electric high pressure gas discharge lamp

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1015927B (en) * 1953-12-30 1957-09-19 Patra Patent Treuhand Electric high pressure gas discharge lamp

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