FR939784A - Improvements to thermionic lamps - Google Patents

Improvements to thermionic lamps

Info

Publication number
FR939784A
FR939784A FR939784DA FR939784A FR 939784 A FR939784 A FR 939784A FR 939784D A FR939784D A FR 939784DA FR 939784 A FR939784 A FR 939784A
Authority
FR
France
Prior art keywords
thermionic
lamps
thermionic lamps
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
Other languages
French (fr)
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.)
Marconis Wireless Telegraph Co Ltd
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
Marconi 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 Marconis Wireless Telegraph Co Ltd, Marconi Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Application granted granted Critical
Publication of FR939784A publication Critical patent/FR939784A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J19/00—Details of vacuum tubes of the types covered by group H01J21/00
    • H01J19/28—Non-electron-emitting electrodes; Screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J2893/00—Discharge tubes and lamps
    • H01J2893/0001—Electrodes and electrode systems suitable for discharge tubes or lamps
    • H01J2893/0012—Constructional arrangements
    • H01J2893/0013—Sealed electrodes
FR939784D 1945-05-02 1947-01-17 Improvements to thermionic lamps Expired FR939784A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB939784X 1945-05-02

Publications (1)

Publication Number Publication Date
FR939784A true FR939784A (en) 1948-11-24

Family

ID=10748327

Family Applications (1)

Application Number Title Priority Date Filing Date
FR939784D Expired FR939784A (en) 1945-05-02 1947-01-17 Improvements to thermionic lamps

Country Status (1)

Country Link
FR (1) FR939784A (en)

Similar Documents

Publication Publication Date Title
FR929598A (en) Improvements to crutches
FR930839A (en) Improvements made to chucks
FR968296A (en) Improvements to discharge lamps
FR941632A (en) Improvements provided to distributor-regulators
FR916831A (en) Shade improvements
FR939784A (en) Improvements to thermionic lamps
FR928867A (en) Burners improvements
FR933155A (en) Improvements to projection lamps
FR932170A (en) Thermionic lamps
FR915397A (en) Improvements relating to aeromotors
FR934862A (en) Wheelbarrow improvements
FR919571A (en) Improvements to radiators
FR920467A (en) Brake improvements
FR911302A (en) Improvements to electronic tubes
FR919108A (en) Improvements to pumps
FR910934A (en) Footwear improvements
FR950213A (en) Thermionic lamps
FR56464E (en) Improvements to cycles
FR936704A (en) Compressor improvements
FR931151A (en) Compressor improvements
FR56470E (en) Improvements to removable constructions
FR945158A (en) Improvements with luminous borders
FR915688A (en) Improvements to stylographs
FR919601A (en) Improvements to riveuses
FR943208A (en) Improvements to mulcher-pulverizers