GB842822A - Improvements in or relating to electric discharge tubes having an indirectly-heated cathode - Google Patents

Improvements in or relating to electric discharge tubes having an indirectly-heated cathode

Info

Publication number
GB842822A
GB842822A GB3360358A GB3360358A GB842822A GB 842822 A GB842822 A GB 842822A GB 3360358 A GB3360358 A GB 3360358A GB 3360358 A GB3360358 A GB 3360358A GB 842822 A GB842822 A GB 842822A
Authority
GB
United Kingdom
Prior art keywords
cathode
indirectly
heater
secured
relating
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
GB3360358A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical Industries 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB842822A publication Critical patent/GB842822A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/13—Solid thermionic cathodes
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment
    • H01J1/24—Insulating layer or body located between heater and emissive material

Landscapes

  • Discharge Lamp (AREA)
  • Microwave Tubes (AREA)

Abstract

842,822. Thermionic-cathode tubes. PHILIPS ELECTRICAL INDUSTRIES Ltd. Oct. 21, 1958 [Oct. 23, 1957], No. 33603/58. Class 39(1). In an indirectly-heated cathode, the insulated wire forming the heater is surrounded and centred by a supporting body of bare metal, the said support being secured independently of the cathode sleeve. Fig. 1 shows a diode having anode 13 and cathode 4. The heater 6 has wound round it a supporting helix 7 of bare molybdenum or tungsten wire, which is secured to supports 8 and 9. One end of the heater is also connected to support 9. The helical support 7 may be wound round a pair of backbone rods, after the manner of a grid, the rods then being secured to the supports 8, 9, Fig. 2 (not shown).
GB3360358A 1957-10-23 1958-10-21 Improvements in or relating to electric discharge tubes having an indirectly-heated cathode Expired GB842822A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL221853 1957-10-23

Publications (1)

Publication Number Publication Date
GB842822A true GB842822A (en) 1960-07-27

Family

ID=19751014

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3360358A Expired GB842822A (en) 1957-10-23 1958-10-21 Improvements in or relating to electric discharge tubes having an indirectly-heated cathode

Country Status (6)

Country Link
BE (1) BE572249A (en)
CH (1) CH366906A (en)
DE (1) DE1093486B (en)
FR (1) FR1204244A (en)
GB (1) GB842822A (en)
NL (1) NL97485C (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE514709A (en) * 1951-10-13
FR1066786A (en) * 1951-11-26 1954-06-09 Philips Nv Indirectly heated electron tube
NL87447C (en) * 1952-10-11
GB787458A (en) * 1953-12-10 1957-12-11 Edison Swan Electric Co Ltd Improvements relating to indirectly heated cathodes for thermionic valves

Also Published As

Publication number Publication date
DE1093486B (en) 1960-11-24
CH366906A (en) 1963-01-31
BE572249A (en)
FR1204244A (en) 1960-01-25
NL97485C (en)

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