GB574581A - Improvements in or relating to luminous discharge tubes - Google Patents

Improvements in or relating to luminous discharge tubes

Info

Publication number
GB574581A
GB574581A GB2182243A GB2182243A GB574581A GB 574581 A GB574581 A GB 574581A GB 2182243 A GB2182243 A GB 2182243A GB 2182243 A GB2182243 A GB 2182243A GB 574581 A GB574581 A GB 574581A
Authority
GB
United Kingdom
Prior art keywords
electrode
electrodes
activator
voltage
starting electrode
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
GB2182243A
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.)
JOHN EDWARD LENNARD JONES
JOHN WESLEY MITCHELL
Original Assignee
JOHN EDWARD LENNARD JONES
JOHN WESLEY MITCHELL
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 JOHN EDWARD LENNARD JONES, JOHN WESLEY MITCHELL filed Critical JOHN EDWARD LENNARD JONES
Priority to GB2182243A priority Critical patent/GB574581A/en
Publication of GB574581A publication Critical patent/GB574581A/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
    • 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
    • H01J17/06—Cathodes
    • H01J17/066—Cold cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0064—Tubes with cold main electrodes (including cold cathodes)
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0064—Tubes with cold main electrodes (including cold cathodes)
    • H01J2893/0065—Electrode systems
    • H01J2893/0066—Construction, material, support, protection and temperature regulation of electrodes; Electrode cups

Landscapes

  • Discharge Lamp (AREA)

Abstract

574,581. Electron discharge devices. JONES, J. E. LENNARD-, and MITCHELL, J. W. Dec. 29, 1943, No. 21822. [Class 39 (i)] An electric discharge lamp includes at least two activated electrodes 42 and 44 in alignment, the activator being an alkali metal or compound thereof and the pressure of the inert gas filling lies between .1 and 3 atmospheres. The electrodes may be composed of copper, nickel or silver and the activator may contain potassium, potassium amalgam or its oxide or hydride. A starting electrode 7 may be provided. The filling may be helium, neon, argon, hydrogen, krypton, xenon, mercury vapour, or mixtures of these. The apparatus is used for producing intense brief flashes for photography. If a starting electrode is used, a condenser connected across the main electrodes is charged to a high voltage and the discharge triggered by a ballistic screen, for example, connected in the grid circuit of a triode whose anode circuit applies a voltage to the starting electrode through a transformer. In a two electrode construction, an auxiliary electrode in a spark gap in' the supply circuit breaks this down to give an intense voltage surge.
GB2182243A 1943-12-29 1943-12-29 Improvements in or relating to luminous discharge tubes Expired GB574581A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2182243A GB574581A (en) 1943-12-29 1943-12-29 Improvements in or relating to luminous discharge tubes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2182243A GB574581A (en) 1943-12-29 1943-12-29 Improvements in or relating to luminous discharge tubes

Publications (1)

Publication Number Publication Date
GB574581A true GB574581A (en) 1946-01-11

Family

ID=10169393

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2182243A Expired GB574581A (en) 1943-12-29 1943-12-29 Improvements in or relating to luminous discharge tubes

Country Status (1)

Country Link
GB (1) GB574581A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1008404B (en) * 1954-09-29 1957-05-16 Patra Patent Treuhand Discharge flash tubes
DE1044443B1 (en) * 1955-05-11 1958-11-20 Patra Patent Treuhand Color matching device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1008404B (en) * 1954-09-29 1957-05-16 Patra Patent Treuhand Discharge flash tubes
DE1044443B1 (en) * 1955-05-11 1958-11-20 Patra Patent Treuhand Color matching device

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