GB676914A - Improvements in or relating to magnetrons - Google Patents

Improvements in or relating to magnetrons

Info

Publication number
GB676914A
GB676914A GB11638/50A GB1163850A GB676914A GB 676914 A GB676914 A GB 676914A GB 11638/50 A GB11638/50 A GB 11638/50A GB 1163850 A GB1163850 A GB 1163850A GB 676914 A GB676914 A GB 676914A
Authority
GB
United Kingdom
Prior art keywords
helix
cathode
frequency
circle
helical turn
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
GB11638/50A
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 GB676914A publication Critical patent/GB676914A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J25/00—Transit-time tubes, e.g. klystrons, travelling-wave tubes, magnetrons
    • H01J25/50—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field
    • H01J25/52—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode
    • H01J25/58—Magnetrons, i.e. tubes with a magnet system producing an H-field crossing the E-field with an electron space having a shape that does not prevent any electron from moving completely around the cathode or guide electrode having a number of resonators; having a composite resonator, e.g. a helix

Landscapes

  • Microwave Tubes (AREA)

Abstract

676,914. Magnetrons. PHILIPS ELECTRICAL INDUSTRIES, Ltd. May 10, 1950 [May 13, 1949], No. 11638/50. Class 39 (i). A magnetron for generating high frequency oscillations, of the kind in which a conductive helix 6 constitutes an electric resonator which determines the frequency and a cathode 4 is located outside the helix so that that part of each helical turn which faces the cathode functions as an anode element, is characterized in that the turns of the helix are connected to one another by means of a conductor 8 which is attached to them at points remote from the cathode. The helix may be straight and the cathode flat, or, as in Fig. 1, the helix may be bent into a circle and the cathode arranged at the centre of the circle. The helix may be supported by a pair of Lecher wires 5 from which the output is taken and may be made of metal tubing through which cooling liquid can be passed; the frequency may be adjusted by varying the temperature and consequently the dimensions of the helix, the length of one helical turn being an integral number of half wavelengths of the frequency generated. The glass envelope is preferably flattened in the vicinity of the electrodes to reduce the air gap in the magnetic circuit.
GB11638/50A 1949-05-13 1950-05-10 Improvements in or relating to magnetrons Expired GB676914A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL283560X 1949-05-13

Publications (1)

Publication Number Publication Date
GB676914A true GB676914A (en) 1952-08-06

Family

ID=19782400

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11638/50A Expired GB676914A (en) 1949-05-13 1950-05-10 Improvements in or relating to magnetrons

Country Status (7)

Country Link
US (1) US2659030A (en)
BE (1) BE495667A (en)
CH (1) CH283560A (en)
DE (1) DE820940C (en)
FR (1) FR1017426A (en)
GB (1) GB676914A (en)
NL (2) NL71310C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2313343A (en) * 1996-05-20 1997-11-26 Reuters Ltd A keyboard having keycaps with transparent front faces

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE426053C (en) * 1926-03-08 Siemens & Halske Akt Ges Discharge tubes
US1417912A (en) * 1916-06-24 1922-05-30 Hewitt Peter Cooper Vacuum electric apparatus
GB344448A (en) * 1929-12-03 1931-03-03 Andre Gabriel Clavier Improvements in or relating to thermionic oscillation generators
US2009369A (en) * 1931-06-24 1935-07-23 Rca Corp Oscillation generation
DE663309C (en) * 1934-10-30 1938-08-04 Telefunken Gmbh Short wave tubes with cathode and one-piece anode arranged concentrically to it
US2266411A (en) * 1938-05-27 1941-12-16 Int Standard Electric Corp Electron tube
FR999345A (en) * 1946-11-20 1952-01-29

Also Published As

Publication number Publication date
NL71310C (en)
NL146431B (en)
CH283560A (en) 1952-06-15
DE820940C (en) 1951-11-15
US2659030A (en) 1953-11-10
BE495667A (en)
FR1017426A (en) 1952-12-10

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