GB797964A - Improvements in or relating to electric discharge valves - Google Patents

Improvements in or relating to electric discharge valves

Info

Publication number
GB797964A
GB797964A GB9932/56A GB993256A GB797964A GB 797964 A GB797964 A GB 797964A GB 9932/56 A GB9932/56 A GB 9932/56A GB 993256 A GB993256 A GB 993256A GB 797964 A GB797964 A GB 797964A
Authority
GB
United Kingdom
Prior art keywords
wires
emissive
cathode
relating
electric discharge
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
GB9932/56A
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.)
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 GB797964A publication Critical patent/GB797964A/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
    • H01J1/15—Cathodes heated directly by an electric current
    • H01J1/16—Cathodes heated directly by an electric current characterised by the shape

Landscapes

  • Discharge Lamp (AREA)
  • Solid Thermionic Cathode (AREA)

Abstract

797,964. Thermionic cathode constructions. PHILIPS ELECTRICAL INDUSTRIES, Ltd. March 29, 1956 [April 2, 1955], No. 9932/56. Class 39(1)' A cage cathode is formed by two sets of wires wound helically in opposite directions, one set wholly within the other, and only the outer set being emissive. Since the emissive wires all lie in the same cylindrical surface, the cathode-grid distance is thus everywhere uniform. The inner wires 5 may be of tungsten, tantalum, or molybdenum, and the outer wires 4 of the same material thoriated. The support wires may be fewer and/or thinner than the emissive wires, and the crossings occasionally welded together.
GB9932/56A 1955-04-02 1956-03-29 Improvements in or relating to electric discharge valves Expired GB797964A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL340280X 1955-04-02

Publications (1)

Publication Number Publication Date
GB797964A true GB797964A (en) 1958-07-09

Family

ID=19784673

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9932/56A Expired GB797964A (en) 1955-04-02 1956-03-29 Improvements in or relating to electric discharge valves

Country Status (6)

Country Link
US (1) US2882436A (en)
CH (1) CH340280A (en)
DE (1) DE1009313B (en)
FR (1) FR1144978A (en)
GB (1) GB797964A (en)
NL (1) NL88786C (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3152276A (en) * 1960-09-08 1964-10-06 Philips Corp Electron tube having coaxial terminals for an interiorly emissive cathode
DE1146985B (en) * 1960-11-04 1963-04-11 Siemens Ag Semi-indirectly heated cathode for electron tubes
FR1312580A (en) * 1961-11-09 1962-12-21 Csf Improvements to millimeter-sized cathodes for electron tubes
US3249791A (en) * 1963-06-12 1966-05-03 Varian Associates Electron tube and combination for sensing and regulating the cathode temperature thereof
FR1455956A (en) * 1965-07-20 1966-05-20 Thomson Houston Comp Francaise Direct heating cathode improvements
US3482300A (en) * 1966-10-31 1969-12-09 Screen Printing Systems Inc Printing screen and method of making same
US3465400A (en) * 1967-02-01 1969-09-09 Varian Associates Method of making cylindrical mesh electrode for electron tubes
NL7201534A (en) * 1972-02-05 1973-08-07
US3976909A (en) * 1975-07-11 1976-08-24 Rca Corporation Wire mesh cathode
SU1042105A1 (en) * 1980-02-05 1983-09-15 Организация П/Я Х-5263 Grid-type filamentary cathode for vacuum tubes and its manufacture method
FR2532468A1 (en) * 1982-08-31 1984-03-02 Thomson Csf IMPROVEMENT TO CATHODES WITH DIRECT HEATING
US4781640A (en) * 1985-01-24 1988-11-01 Varian Associates, Inc. Basket electrode shaping

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1596672A (en) * 1924-02-05 1926-08-17 Luckash Andrew Audion tube
US1874355A (en) * 1924-03-10 1932-08-30 Rca Corp Thermionic valve
US2210761A (en) * 1936-10-07 1940-08-06 Gen Electric Cathode
US2363028A (en) * 1941-12-16 1944-11-21 Carl J Warnke Cathode filament
US2724069A (en) * 1950-03-30 1955-11-15 English Electric Valve Co Ltd Thermionic valves
DE899081C (en) * 1950-05-17 1953-12-07 Siemens Ag Cathode for electron tubes
NL86395C (en) * 1950-05-17

Also Published As

Publication number Publication date
FR1144978A (en) 1957-10-21
NL88786C (en)
DE1009313B (en) 1957-05-29
CH340280A (en) 1959-08-15
US2882436A (en) 1959-04-14

Similar Documents

Publication Publication Date Title
GB797964A (en) Improvements in or relating to electric discharge valves
GB839945A (en) Improvements in x-ray tubes
GB716412A (en) Improvements in cylindrical cathodes
GB644418A (en) Improvements in and relating to ionization-type vacuum gauges
GB495846A (en) Improvements in and relating to electric discharge devices
GB725719A (en) Improvements in and relating to cathodes for electric discharge devices
GB504120A (en) Improvements in electrodes for high-pressure mercury-vapour discharge devices
GB791495A (en) Improvements in or relating to cathodes of the dispenser type
GB931059A (en) Improvements in and relating to thermionic cathodes
GB855568A (en) Magnetron oscillator
GB626710A (en) Improvements in electric discharge tubes, having a secondary-emission electrode
GB706848A (en) Improvements in or relating to magnetrons
GB833432A (en) Improvements in or relating to indirectly heated cathodes for electron discharge devices and to heater elements therefor
GB829339A (en) Improvements in or relating to equipotential cathodes for electric discharge tubes and discharge tubes containing such cathodes
GB434643A (en) Improvements in or relating to electron discharge devices
SE325340B (en)
US2324776A (en) Vacuum tube
GB857090A (en) Improvements in or relating to thermionic dispenser cathodes
GB1070377A (en) Improvements in or relating to thermionic cathodes and to electron discharge devices employing thermionic cathodes
US2486292A (en) Cathode structure for electric discharge tubes
GB820885A (en) Improvements in control electrodes for gas-filled electric discharge devices
GB757066A (en) Improvements in or relating to cylindrical dispenser cathodes
GB766881A (en) Improvements relating to cathodes for high power valves
GB792551A (en) Improvements in or relating to electric discharge tubes
GB789071A (en) Electrode for electric discharge tubes