GB421469A - Improvements in or relating to thermionic valves and the like - Google Patents

Improvements in or relating to thermionic valves and the like

Info

Publication number
GB421469A
GB421469A GB17104/33A GB1710433A GB421469A GB 421469 A GB421469 A GB 421469A GB 17104/33 A GB17104/33 A GB 17104/33A GB 1710433 A GB1710433 A GB 1710433A GB 421469 A GB421469 A GB 421469A
Authority
GB
United Kingdom
Prior art keywords
tube
cathode
pinch
june
leads
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
GB17104/33A
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Publication of GB421469A publication Critical patent/GB421469A/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
    • H01J19/40—Screens for shielding

Landscapes

  • Hybrid Cells (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)

Abstract

421,469. Thermionic valves. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE, 12, Hallesches Ufer, Berlin. June 15, 1933, No. 17104. Convention date, June 15, 1932. [Class 39 (i)] In an indirectlyheated cathode in which a metallic tube 3, coaxial with and connected with the cathode 5, is fused to the pinch 2 so as to act as a screen for the heating current, the end of the tube which projects through the pinch is enclosed in a vitreous tube 4 pressed into the pinch with the metallic tube and sealed off. The other end of the tube 3 may overlap the cathode, and additional screens may be arranged around the junction. The leads 9, 10, 11 to the heater and cathode are sealed through the end 4<1> of the tube 4. In another arrangement the metallic tube is formed by an extension of the cathode, and is provided with narrow slits to prevent conduction of heat. A pump connection may be provided on the pinch. The Specification as open to inspection under Sect. 91 comprises also a valve in which the end of the vitreous tube forms the pump connection and the leads are taken through the side of the tube. This subject-matter does not appear in the Specification as accepted.
GB17104/33A 1932-06-15 1933-06-15 Improvements in or relating to thermionic valves and the like Expired GB421469A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE421469X 1932-06-15

Publications (1)

Publication Number Publication Date
GB421469A true GB421469A (en) 1934-12-17

Family

ID=6458116

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17104/33A Expired GB421469A (en) 1932-06-15 1933-06-15 Improvements in or relating to thermionic valves and the like

Country Status (1)

Country Link
GB (1) GB421469A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE764008C (en) * 1938-06-09 1945-01-11 Philips Patentverwaltung Electric discharge tubes

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE764008C (en) * 1938-06-09 1945-01-11 Philips Patentverwaltung Electric discharge tubes

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