GB308879A - Improvements in or relating to electric discharge tubes - Google Patents

Improvements in or relating to electric discharge tubes

Info

Publication number
GB308879A
GB308879A GB685728A GB685728A GB308879A GB 308879 A GB308879 A GB 308879A GB 685728 A GB685728 A GB 685728A GB 685728 A GB685728 A GB 685728A GB 308879 A GB308879 A GB 308879A
Authority
GB
United Kingdom
Prior art keywords
anodes
stem
cathode
anode
thorium
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
GB685728A
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
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 Philips Gloeilampenfabrieken NV filed Critical Philips Gloeilampenfabrieken NV
Priority to GB685728A priority Critical patent/GB308879A/en
Priority to US325229A priority patent/US1882671A/en
Priority to FR665991D priority patent/FR665991A/en
Publication of GB308879A publication Critical patent/GB308879A/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
    • H01J17/02—Details
    • H01J17/04—Electrodes; Screens

Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)

Abstract

308,879. Dicker, S. G. S., (Naamlooze Vennootschap Philips' Gloeilampenfabrieken). March 5, 1928. Vacuum tubes.-In a discharge tube for rectifying polyphase currents and having an incandescent cathode and at least three anodes, all the electrodes are mounted on two stems or pinches. The cathode 7 and two anodes 8 may be mounted on one stem 2, as shown, while a third anode 8 is mounted on a stem 4. Other constructions are described wherein the cathode and one anode are mounted on one stem and two anodes on another stem (Fig. 1, not shown), and wherein the cathode is mounted alone on one stem and three anodes on the second stem. To increase the back-ignition voltage the anodes are surrounded by hoods 9 having constrictions 10. These hoods may be of insulating material, or of conducting material which is connected through condensers 14 to the anodes. The cathode preferably consists of a wide helix of tungsten wire upon which an oxide-coated nickel wire has been wound, or tungsten, thorium, or molybdenum-thorium cathodes may be used. The anode supporting wires may be enclosed in insulating cylinders.
GB685728A 1928-02-11 1928-03-05 Improvements in or relating to electric discharge tubes Expired GB308879A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB685728A GB308879A (en) 1928-03-05 1928-03-05 Improvements in or relating to electric discharge tubes
US325229A US1882671A (en) 1928-02-11 1928-12-11 Electric discharge tube
FR665991D FR665991A (en) 1928-02-11 1928-12-17 Electric discharge tube

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB685728A GB308879A (en) 1928-03-05 1928-03-05 Improvements in or relating to electric discharge tubes

Publications (1)

Publication Number Publication Date
GB308879A true GB308879A (en) 1929-04-04

Family

ID=9822011

Family Applications (1)

Application Number Title Priority Date Filing Date
GB685728A Expired GB308879A (en) 1928-02-11 1928-03-05 Improvements in or relating to electric discharge tubes

Country Status (1)

Country Link
GB (1) GB308879A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3591316A (en) * 1969-02-26 1971-07-06 Robert J Piccirilli Automatic centrifugal pump primer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3591316A (en) * 1969-02-26 1971-07-06 Robert J Piccirilli Automatic centrifugal pump primer

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