GB707096A - Improvements in heaters for electron emitters - Google Patents

Improvements in heaters for electron emitters

Info

Publication number
GB707096A
GB707096A GB2402651A GB2402651A GB707096A GB 707096 A GB707096 A GB 707096A GB 2402651 A GB2402651 A GB 2402651A GB 2402651 A GB2402651 A GB 2402651A GB 707096 A GB707096 A GB 707096A
Authority
GB
United Kingdom
Prior art keywords
wires
section
leads
heater
paralleled
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
GB2402651A
Inventor
John Heywood Ludlow
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.)
Metropolitan Vickers Electrical Co Ltd
Original Assignee
Metropolitan Vickers Electrical Co 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
Priority to BE514838D priority Critical patent/BE514838A/xx
Application filed by Metropolitan Vickers Electrical Co Ltd filed Critical Metropolitan Vickers Electrical Co Ltd
Priority to GB2402651A priority patent/GB707096A/en
Priority to FR1070504D priority patent/FR1070504A/en
Publication of GB707096A publication Critical patent/GB707096A/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
    • H01J1/22—Heaters

Landscapes

  • Microwave Tubes (AREA)

Abstract

707,096. Thermionic-cathode tubes. METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. Oct. 13, 1952 [Oct. 15, 1951], No. 24026/51. Class 39(1) [Also in Group XI] A cathode heater comprises at least two wires extending spirally outwards from a common hub 5 to fixed leads-in, and so disposed that thermal expansion of the wires causes the hub to rotate on a pivot. An arrangement of three such wires may be fed with threephase A.C. In Fig. 4, four such wires 1, 2, 3, 4, are shown. The four lead-in supports 6, 7, 8, 9 are attached to a base member consisting of an outer section 11 having a slot containing an inner section 12, with separating insulation 13. Section 11 carries leads 7. 9, and section 12 carries leads 6, 8; thus paralleled filaments 1, 3 are in series with paralleled filaments 2, 4. 17, 18, 19 are heat shields of polished molybdenum. The surface of the heater may be curved, instead of planar: and the wires may themselves have an emissive coating, or may act as an indirect heater behind an emissive surface.
GB2402651A 1951-10-15 1951-10-15 Improvements in heaters for electron emitters Expired GB707096A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE514838D BE514838A (en) 1951-10-15
GB2402651A GB707096A (en) 1951-10-15 1951-10-15 Improvements in heaters for electron emitters
FR1070504D FR1070504A (en) 1951-10-15 1952-10-15 advanced heating elements for electron emitting devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2402651A GB707096A (en) 1951-10-15 1951-10-15 Improvements in heaters for electron emitters

Publications (1)

Publication Number Publication Date
GB707096A true GB707096A (en) 1954-04-14

Family

ID=10205197

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2402651A Expired GB707096A (en) 1951-10-15 1951-10-15 Improvements in heaters for electron emitters

Country Status (3)

Country Link
BE (1) BE514838A (en)
FR (1) FR1070504A (en)
GB (1) GB707096A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2814751A (en) * 1955-03-16 1957-11-26 Eitel Mccullough Inc Stem structure for beam type tubes
GB2214705A (en) * 1988-01-26 1989-09-06 English Electric Valve Co Ltd Directly heated cathode

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2814751A (en) * 1955-03-16 1957-11-26 Eitel Mccullough Inc Stem structure for beam type tubes
GB2214705A (en) * 1988-01-26 1989-09-06 English Electric Valve Co Ltd Directly heated cathode

Also Published As

Publication number Publication date
FR1070504A (en) 1954-07-28
BE514838A (en)

Similar Documents

Publication Publication Date Title
GB852734A (en) Improvements in x-ray generator tubes
GB707096A (en) Improvements in heaters for electron emitters
GB554828A (en) Improvements in or relating to electric discharge tubes having a directional electron beam
GB478024A (en) Improvements in or relating to thermionic cathodes for high pressure metal vapour discharge devices
GB346957A (en) Improvements in and relating to electron discharge devices
GB1141448A (en) Multiple-cathode x-ray triode tube
GB1216584A (en) Directly heated cathode
GB1094279A (en) Improvements in or relating to energy converters
US2517334A (en) Electron tube having annular envelope
GB954335A (en) Cooling apparatus for electron discharge devices
GB708216A (en) Improvements in and relating to magnetrons
GB833432A (en) Improvements in or relating to indirectly heated cathodes for electron discharge devices and to heater elements therefor
US2250874A (en) Thermionic discharge tube system
ES348151A1 (en) Indirectly heated cathode having portions with different thermal relations with a heater
GB711418A (en) Improvements in cathodes
GB608677A (en) Improvements in gas-filled electron discharge devices
US1971812A (en) X-ray device
GB309447A (en) Improvements in or relating to thermionic devices
GB558336A (en) Improvements relating to electric devices having an enclosing envelope
US2568552A (en) High-voltage electronic rectifier tube of the incandescent filament type
GB966130A (en) Improvements in thermionic converters
GB415398A (en) Improvements relating to indirectly heated cathodes for electron discharge devices
GB918664A (en) Improvements in and relating to x-ray tubes
GB659798A (en) Improvements in and relating to x-ray tubes
GB609376A (en) Improvements in electrical discharge device