US1866358A - Electrode support - Google Patents

Electrode support Download PDF

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Publication number
US1866358A
US1866358A US229728A US22972827A US1866358A US 1866358 A US1866358 A US 1866358A US 229728 A US229728 A US 229728A US 22972827 A US22972827 A US 22972827A US 1866358 A US1866358 A US 1866358A
Authority
US
United States
Prior art keywords
filament
wire
electrode
secured
wires
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 - Lifetime
Application number
US229728A
Other languages
English (en)
Inventor
Kenneth H Kingdon
Tonks Lewi
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.)
General Electric Co
Original Assignee
General Electric Co
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 NL25068D priority Critical patent/NL25068C/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US229728A priority patent/US1866358A/en
Priority to FR35993D priority patent/FR35993E/fr
Priority to GB31404/28A priority patent/GB299730A/en
Application granted granted Critical
Publication of US1866358A publication Critical patent/US1866358A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01J1/18—Supports; Vibration-damping arrangements

Definitions

  • the present invention relates to electron discharge devices and more particularly to an arrangement for supporting a filamentary cathode in such a device.
  • Fig. 1 shows a view partly broken away of an electron discharge device embodying the features of the present invention
  • Fig. 2 is a view, on an enlarged scale, of the cathode and cathode supporting means
  • Fig. 3 is a detail view of a modified form of the invention.
  • FIG. 1 an electron discharge device comprising an evacuated receptacle 1, containing the usual anode 2, grid or control electrode 3, and cathode or filamentary electrode 4.
  • the grid element 3 is supported on a flat metal plate 5 which is spaced from the anode 2, as indicated at 6 and connected to wires 7 and 8, one of which serves as a leading-in wire to supply a potential to the grid.
  • the anode 2 is supported on wires 9 and 10, one of which serves as a leading-in wire.
  • a metal plate 11 is secured to a wire 11 connected to the anode supporting wires and carries a pellet containing a caesium compound from which caesium may be liberated during the exhaust of the tube.
  • the pellet is enclosed in a metal cap 12 which is secured to plate 11 by flanged portions 13 on the cap.
  • The-filamentary electrode 4 comprises a coiled wire supported at its lower and upper ends by nickel wires 14 and 18 respectively. W'ires 14 and 18 are relatively heavy as compared with the filament 4. Wire 14 is secured to a leading-in wire 15 while a second leadingin wire 16 extends upwardly on the outside of anode 2 and is provided at its upper end-with a right angled extension 17 to which wire 18 is secured.
  • the filament is formed by winding it on a 15 mil mandrel so that the opening, at least through the end portions of the filament, is approximately of that diameter.
  • the filament, between the end portions thereof, may 7 be somewhat drawn out, as clearly indicated in Fig. 2.
  • the filamentary electrode loosely surrounds the end portions of wires 14 and 18. H These wires are about 10 mils in diameter and project an appreciable distance into each end of the coiled filament making a loose rubbing or frictional contact with the filament.
  • the ends of the filament are spot welded to the wires 14 and 18 at points 19 and 20, respectively, so that a rubbing contact is provided between each support 12 and 13 and the filament at points intermediate the ends of the filament.
  • the frictional effect near the ends of the filament rapidly clamps out filament vibration and substantially eliminates the microphonic noises due to such vibration.
  • each end portion of the filament 4 may surround each end portion of the filament 4 with a tubular meta-l member 21 (Fig. 3) which is reduced in diameterat one end and secured at that end to the filament supporting wire by any suitable means.
  • the filament is 5 secured to the wire 18 at a point adjacent the end of'the wire.
  • the tubular member 21 is slightly larger in diameter than the diameter of the end portion of the coiled filament so that the tubular member makes a rubbing or frictional contact with the end portion of the filament when the latter vibrates.
  • a coiled filamentary electrode and means for supporting the elec trode comprising a wire extending loosely an appreciable distance into one end of the filament and secured to the filament at a point intermediate the ends of the wire and adapted to provide a frictional contact between the wire and filament.
  • An electric discharge device comprising an envelope containing a cathode, electrostatic control member and an anode, 'said cathode consisting of a coiled filament which is normally subject to vibration under operating condition whereby microphonic noises are set up in the device, and means for reducing said vibrations, said means comprising a rod rigidly mounted in the envelope and secured to one end of the filament, said rod extending loosely within the filament coils and arranged to provide a rubbing Contact therewith at points intermediate the ends of the filament.

Landscapes

  • Microwave Tubes (AREA)
  • Solid Thermionic Cathode (AREA)
  • Electron Sources, Ion Sources (AREA)
US229728A 1927-10-29 1927-10-29 Electrode support Expired - Lifetime US1866358A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL25068D NL25068C (enrdf_load_stackoverflow) 1927-10-29
US229728A US1866358A (en) 1927-10-29 1927-10-29 Electrode support
FR35993D FR35993E (fr) 1927-10-29 1928-10-12 Perfectionnements à la construction des tubes à décharge électronique
GB31404/28A GB299730A (enrdf_load_stackoverflow) 1927-10-29 1928-10-29

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US229728A US1866358A (en) 1927-10-29 1927-10-29 Electrode support

Publications (1)

Publication Number Publication Date
US1866358A true US1866358A (en) 1932-07-05

Family

ID=22862463

Family Applications (1)

Application Number Title Priority Date Filing Date
US229728A Expired - Lifetime US1866358A (en) 1927-10-29 1927-10-29 Electrode support

Country Status (4)

Country Link
US (1) US1866358A (enrdf_load_stackoverflow)
FR (1) FR35993E (enrdf_load_stackoverflow)
GB (1) GB299730A (enrdf_load_stackoverflow)
NL (1) NL25068C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3579021A (en) * 1969-04-30 1971-05-18 Sylvania Electric Prod Incandescent lamp having linear output

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3579021A (en) * 1969-04-30 1971-05-18 Sylvania Electric Prod Incandescent lamp having linear output

Also Published As

Publication number Publication date
GB299730A (enrdf_load_stackoverflow) 1929-09-05
FR35993E (fr) 1930-04-05
NL25068C (enrdf_load_stackoverflow)

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