GB816082A - Electron tube - Google Patents

Electron tube

Info

Publication number
GB816082A
GB816082A GB39457/56A GB3945756A GB816082A GB 816082 A GB816082 A GB 816082A GB 39457/56 A GB39457/56 A GB 39457/56A GB 3945756 A GB3945756 A GB 3945756A GB 816082 A GB816082 A GB 816082A
Authority
GB
United Kingdom
Prior art keywords
pin
shield
terminal
header
heat
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
GB39457/56A
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.)
Varian Medical Systems Inc
Original Assignee
Eitel Mccullough Inc
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 Eitel Mccullough Inc filed Critical Eitel Mccullough Inc
Publication of GB816082A publication Critical patent/GB816082A/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

Landscapes

  • Thermal Insulation (AREA)

Abstract

816,082. Thermionic-cathode tubes. EITELMcCULLOUGH Inc. Dec. 28, 1956 [Feb. 23, 1956], No. 39457/56. Class 39(1). A discharge tube has a pin 19 sealed through an insulating header, the pin acting as both terminal and support for a cathode unit 23 which comprises a hollow cylinder having end walls; part of the sidewall 24, 26 is provided with a heat dam, e.g. by insertion of a section 25 of higher resistance; the side-wall near one end forms the emissive portion, the other end 27 being mounted on pin 19. The tube has an external anode 4 provided with cooling fins or channels 12,13,14. Theanode is extended downwardly, as at 33, to shield the seal between envelope parts 3 and 10 from heat and electron bombardment. A further shielding ring 34 is supported from a flange 35 secured between the metal rings 6 and 7 which join the header 2 to envelope part 3. These rings form a terminal for the shield 34, which can be given a low voltage so that the shielding elements 33, 34 act in addition as an electrostatic trap.
GB39457/56A 1956-02-23 1956-12-28 Electron tube Expired GB816082A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US816082XA 1956-02-23 1956-02-23

Publications (1)

Publication Number Publication Date
GB816082A true GB816082A (en) 1959-07-08

Family

ID=22165216

Family Applications (1)

Application Number Title Priority Date Filing Date
GB39457/56A Expired GB816082A (en) 1956-02-23 1956-12-28 Electron tube

Country Status (1)

Country Link
GB (1) GB816082A (en)

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