GB237923A - - Google Patents

Info

Publication number
GB237923A
GB237923A GB19500/25A GB1950025A GB237923A GB 237923 A GB237923 A GB 237923A GB 19500/25 A GB19500/25 A GB 19500/25A GB 1950025 A GB1950025 A GB 1950025A GB 237923 A GB237923 A GB 237923A
Authority
GB
United Kingdom
Prior art keywords
gas
tube
electrodes
hydrogen
calcium
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
GB19500/25A
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.)
EDISON SWAN ELECTRIC COMPANY Ltd
Original Assignee
EDISON SWAN ELECTRIC COMPANY 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 EDISON SWAN ELECTRIC COMPANY Ltd filed Critical EDISON SWAN ELECTRIC COMPANY Ltd
Publication of GB237923A publication Critical patent/GB237923A/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
    • H01J19/68—Specified gas introduced into the tube at low pressure, e.g. for reducing or influencing space charge

Landscapes

  • Discharge Lamp (AREA)

Abstract

237,923. Edison Swan Electric Co., Ltd., (Assignees of Radio-R÷hren-Laboratorium Dr. G. Nickel Ges.). Aug. 1, 1924, [Convention date]. Void [Published under Sect. 91 of the Act]. Drawings to Specification. Vacuum tubes. - Discharge tubes contain very small quantities of electropositive gas, such as hydrogen, which are partly occluded in the electrodes and walls of the tube, disintegration of the cathode and noises in speech reproduction due to gas ionization being diminished. The gas may in part combine chemically with the coated incandescent cathode or other electrodes or parts of the tube and may reappear during the operation of the tube, positive ions being formed; for example, calcium or calcium oxide forms thermionically active calcium hydride with hydrogen at high temperatures. The tube is highly evacuated and the gas is introduced into, or produced within, the tube, surplus gas being pumped out. With gas at 10-5 mm. of mercury, the anode current-grid voltage characteristic is straight. Wolfram cathodes are referred to.
GB19500/25A 1924-08-01 1925-07-31 Expired GB237923A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE237934X 1924-08-01

Publications (1)

Publication Number Publication Date
GB237923A true GB237923A (en) 1926-05-20

Family

ID=5903356

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19500/25A Expired GB237923A (en) 1924-08-01 1925-07-31

Country Status (1)

Country Link
GB (1) GB237923A (en)

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