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GB636383A - Improvements in and relating to cathodes for electric discharge devices - Google Patents

Improvements in and relating to cathodes for electric discharge devices

Info

Publication number
GB636383A
GB636383A GB7144/46A GB714446A GB636383A GB 636383 A GB636383 A GB 636383A GB 7144/46 A GB7144/46 A GB 7144/46A GB 714446 A GB714446 A GB 714446A GB 636383 A GB636383 A GB 636383A
Authority
GB
United Kingdom
Prior art keywords
coil
electric discharge
march
gas pressure
wire
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
GB7144/46A
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 GB636383A publication Critical patent/GB636383A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/04—Electrodes; Screens; Shields
    • H01J61/06—Main electrodes
    • H01J61/067—Main electrodes for low-pressure discharge lamps
    • H01J61/0672—Main electrodes for low-pressure discharge lamps characterised by the construction of the electrode

Landscapes

  • Discharge Lamp (AREA)
  • Lasers (AREA)

Abstract

636,383. Discharge lamps. BRITISH THOMSON-HOUSTON CO., Ltd. March 7, 1946, No. 7144. Convention date, March 10, 1945. [Class 39 (i)] A thermionic electrode for an electric discharge device in which the gas pressure is less than 25 mms., comprises a helical wire coil 7, the dimensions of which are so arranged, according to the gas pressure, that a glow takes place within it on starting. The coil may be over-wound with smaller wire and encloses a core 10 of activating material within all except its end turns. If the tube is filled with argon at 3¢ mm. pressure the internal coil size should be between 15 and 40 mils diameter, the coil turns spacing not exceeding 5 mils. The leadin wires 3 and 4 are of the axial " seal " wire type, but the inner lead 12 is of de-oxidised copper which may be nickel-plated. Specifications 569,685 and 596,767, [Group III], are referred to.
GB7144/46A 1945-03-10 1946-03-07 Improvements in and relating to cathodes for electric discharge devices Expired GB636383A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US582021A US2441863A (en) 1945-03-10 1945-03-10 Electrode for discharge devices

Publications (1)

Publication Number Publication Date
GB636383A true GB636383A (en) 1950-04-26

Family

ID=24327519

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7144/46A Expired GB636383A (en) 1945-03-10 1946-03-07 Improvements in and relating to cathodes for electric discharge devices

Country Status (3)

Country Link
US (1) US2441863A (en)
FR (1) FR923511A (en)
GB (1) GB636383A (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2829300A (en) * 1951-08-15 1958-04-01 Bell Telephone Labor Inc Traveling wave device
US2957995A (en) * 1956-12-31 1960-10-25 Gen Electric Instant start discharge lamp
US4105908A (en) * 1976-04-30 1978-08-08 General Electric Company Metal halide lamp having open tungsten coil electrodes
GB2043331B (en) * 1978-12-26 1982-11-17 Gen Electric Electrode for high pressure metal-vapour lamp
US4516057A (en) * 1982-01-04 1985-05-07 Gte Laboratories Incorporated Multi-electrode array for a beam mode fluorescent lamp
US4494046A (en) * 1982-01-04 1985-01-15 Gte Laboratories Incorporated Single cathode beam mode fluorescent lamp for DC use
US4450380A (en) * 1982-01-04 1984-05-22 Gte Laboratories Incorporated Multi-electrode array for a beam mode fluorescent lamp
US4408141A (en) * 1982-01-04 1983-10-04 Gte Laboratories Incorporated Dual cathode beam mode fluorescent lamp
US4518897A (en) * 1982-01-04 1985-05-21 Gte Laboratories Incorporated Twin anode beam mode fluorescent lamp

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE58647C (en) * M. EPPLE in München Axis regulator
US2153008A (en) * 1935-01-25 1939-04-04 Gen Electric Electric discharge lamp
US2116927A (en) * 1935-04-20 1938-05-10 Germer Edmund Electrical discharge device
US2355258A (en) * 1941-05-13 1944-08-08 Sylvania Electric Prod Ultraviolet fluorescent lamp
US2306925A (en) * 1941-07-29 1942-12-29 Gen Electric Electrode and its fabrication
US2329126A (en) * 1941-09-17 1943-09-07 Gen Electric Electric discharge device and electrode therefor

Also Published As

Publication number Publication date
FR923511A (en) 1947-07-09
US2441863A (en) 1948-05-18

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