GB178906A - Improvements in and relating to electron discharge devices - Google Patents

Improvements in and relating to electron discharge devices

Info

Publication number
GB178906A
GB178906A GB256021A GB256021A GB178906A GB 178906 A GB178906 A GB 178906A GB 256021 A GB256021 A GB 256021A GB 256021 A GB256021 A GB 256021A GB 178906 A GB178906 A GB 178906A
Authority
GB
United Kingdom
Prior art keywords
anode
cathode
battery
valve
magnetic field
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
GB256021A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority to GB256021A priority Critical patent/GB178906A/en
Publication of GB178906A publication Critical patent/GB178906A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J21/00—Vacuum tubes
    • H01J21/02—Tubes with a single discharge path
    • H01J21/18—Tubes with a single discharge path having magnetic control means; having both magnetic and electrostatic control means

Landscapes

  • Secondary Cells (AREA)

Abstract

178,906. British Thomson-Houston Co., Ltd., (General Electric Co.). Jan. 19, 1921. Thermionic amplifiers. -In a thermionic or like valve of the type described in Specification 167,561, in which the discharge between an electron-emitting cathode and an anode is controlled by a magnetic field of a magnitude near the critical value at which a small increase in the field produces a substantial reduction in the current passing through the valve, the cathode is now arranged around the anode. As shown, the anode 17 is mounted in the axis of a helical cathode 2 heated by a battery 5. The magnetic field may be produced by polarizing windings 10, 11 in series with a battery 12, and a variable resistance 13, and by a winding 7 carrying current to be amplified, for instance, wireless-signalling currents. The anode is connected with the cathode through a battery 14 and an indicating device such as a telephone receiver 15. The bulb is preferably highly exhausted, so that a pure electron discharge is obtained, but a small amount of gas ionization is permissible.
GB256021A 1921-01-19 1921-01-19 Improvements in and relating to electron discharge devices Expired GB178906A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB256021A GB178906A (en) 1921-01-19 1921-01-19 Improvements in and relating to electron discharge devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB256021A GB178906A (en) 1921-01-19 1921-01-19 Improvements in and relating to electron discharge devices

Publications (1)

Publication Number Publication Date
GB178906A true GB178906A (en) 1922-04-19

Family

ID=31503164

Family Applications (1)

Application Number Title Priority Date Filing Date
GB256021A Expired GB178906A (en) 1921-01-19 1921-01-19 Improvements in and relating to electron discharge devices

Country Status (1)

Country Link
GB (1) GB178906A (en)

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