GB893553A - Improvements in or relating to cold cathode display tubes - Google Patents

Improvements in or relating to cold cathode display tubes

Info

Publication number
GB893553A
GB893553A GB2687258A GB2687258A GB893553A GB 893553 A GB893553 A GB 893553A GB 2687258 A GB2687258 A GB 2687258A GB 2687258 A GB2687258 A GB 2687258A GB 893553 A GB893553 A GB 893553A
Authority
GB
United Kingdom
Prior art keywords
electrodes
cathode
relating
shaped
glow discharge
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
GB2687258A
Inventor
George Francis Klepp
Olaf Henry Dalton
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB2687258A priority Critical patent/GB893553A/en
Publication of GB893553A publication Critical patent/GB893553A/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
    • H01J17/38—Cold-cathode tubes
    • H01J17/48—Cold-cathode tubes with more than one cathode or anode, e.g. sequence-discharge tube, counting tube, dekatron
    • H01J17/49—Display panels, e.g. with crossed electrodes, e.g. making use of direct current
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0069—Tubes for displaying characters

Landscapes

  • Gas-Filled Discharge Tubes (AREA)

Abstract

893,553. Glow discharge lamps. STANDARD TELEPHONES & CABLES Ltd. Aug. 21, 1958, No. 26872/58. Class 39(1) A cold-cathode numeral display tube comprises nine electrodes, each shaped as one of the arabic numerals 0 1 . . . 9 excluding 8 and connected to a separate pin of a 9-pin base. Electrodes 3 and 6 may function as cathodes at the same time and are so shaped and arranged that the two cathode glows together appear as numeral 8. The operating circuit is such that either of at least two electrodes may be connected to a positive potential while any one of the electrodes, or both electrodes 3 and 6 are connected as cathode to establish a glow discharge. As shown, the electrodes are supported between mica discs 21, 22. The electrodes are preferably connected to the negative potential through resistors, the valves of which are selected to equalize the current densities carried by the electrodes. The tube may contain a mixture of neon and 1% argon at a pressure of 30 mms. of Hg.
GB2687258A 1958-08-21 1958-08-21 Improvements in or relating to cold cathode display tubes Expired GB893553A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2687258A GB893553A (en) 1958-08-21 1958-08-21 Improvements in or relating to cold cathode display tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2687258A GB893553A (en) 1958-08-21 1958-08-21 Improvements in or relating to cold cathode display tubes

Publications (1)

Publication Number Publication Date
GB893553A true GB893553A (en) 1962-04-11

Family

ID=10250541

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2687258A Expired GB893553A (en) 1958-08-21 1958-08-21 Improvements in or relating to cold cathode display tubes

Country Status (1)

Country Link
GB (1) GB893553A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3386785A (en) * 1965-04-24 1968-06-04 Philips Corp Method of manufacturing a gas discharge tube

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3386785A (en) * 1965-04-24 1968-06-04 Philips Corp Method of manufacturing a gas discharge tube

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