US3026442A - Flexible connection between two aligned conductors one of which is sealed into the glass wall of a discharge tube - Google Patents

Flexible connection between two aligned conductors one of which is sealed into the glass wall of a discharge tube Download PDF

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Publication number
US3026442A
US3026442A US845141A US84514159A US3026442A US 3026442 A US3026442 A US 3026442A US 845141 A US845141 A US 845141A US 84514159 A US84514159 A US 84514159A US 3026442 A US3026442 A US 3026442A
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US
United States
Prior art keywords
flexible connection
sealed
discharge tube
glass wall
conductors
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
US845141A
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English (en)
Inventor
Lingers Franciscus
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.)
US Philips Corp
North American Philips Co Inc
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US Philips Corp
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Filing date
Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
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Publication of US3026442A publication Critical patent/US3026442A/en
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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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/02—Electrodes; Magnetic control means; Screens
    • H01J23/04—Cathodes
    • H01J23/05—Cathodes having a cylindrical emissive surface, e.g. cathodes for magnetrons
    • 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

Definitions

  • the above-mentioned structure occurs inter alia with the current-supply conductors for the axially-supported thermionic cathode magnetron.
  • the supply conductors for the thermionic cathode then comprise a tubular member which is rigidly connected to the wall and carries the thermionic cathode and also, in the interior of this memher, a rodlike conductor which constitutes the second supply conductor. Due to the influence of the thermal expansion of the cathode, the said rod like conductor may undergo considerable axial displacements so that it cannot be rigidly connected to a lead-through conductor s'ealed into the glass wall.
  • the space for accommodating known flexible connections between the inner conductor and the lead-through pin is usually too small. Such a problem of a flexible connection between two conductors may also occur in other structures.
  • a flexible connection between two aligned conductors one of which is sealed into the glass wall of a discharge tube and the other of which can be moved with respect to this wall in the direction of its length, comprises a narrow strip of sheet metal which is rolled onto one conductor after being secured thereto, whereas the other conductor is secured to a projecting tongue of the said strip and extends to approximately halfway the rolled portion.
  • the structure according to the invention provides a connection which allows of axial movements with very weak forces and which has proper rigidity in a direction at right angles to the conductors.
  • FIG. 1 shows a longitudinal section of the supply conductor for a thermionic cathode of a magnetron for 4 mms. of wave-length;
  • FIG. 2 shows a cross-section of the flexible connection
  • FIG. 3 shows the unrolled metal strip with the conductors secured thereto.
  • reference numeral 1 indicates the incorporated pole-piece of a magnetron cathode 2.
  • the heater body situated beside the cathode 2 is indicated by 3. From this heater body, a molybdenum tube 4 and a molybdenum rod 5 lead to a cylinder 8 of Fernico-material which is sealed between glass cylinders 6 and 7, and to a lead-through pin 9 in glass cylinder 7, respectively.
  • a flexible connection comprising a rolled-up strip of molybdenum sheet 11 of microns thickness is provided between a thinner end 10 of the pin 9 and the rod 5. The dimensions of the said strip follow from the graduation shown in FIG. 3.
  • the rod 5 is welded in position before rolling up and the pin 10 is secured, after rolling up, to a tongue 12 of the strip 11.
  • FIG. 2 is a cross-sectional view of the flexible connection.
  • the distance between the rod 5 and the pin 10 in the flexible connection need be no more than a few tenths of a millimetre.
  • a pair of aligned conductors one of which is sealed in the wall of the tube and the other of which is moveable longitudinally relative to said wall, and means connecting said conductors to permit longitudinal movement of the said conductor without lateral movement
  • said means comprising a strip of sheet metal secured to and tightly rolled about one conductor to prevent lateral movement thereof when said latter conductor is moved longitudinally relative to the first conductor, said strip having a projecting tongue to which the other conductor is secured, said rolled up strip having a given axial length, said other conductor extending approximately along half the axial length of the rolled-up strip of sheet metal.

Landscapes

  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
US845141A 1958-11-19 1959-10-08 Flexible connection between two aligned conductors one of which is sealed into the glass wall of a discharge tube Expired - Lifetime US3026442A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL233389 1958-11-19

Publications (1)

Publication Number Publication Date
US3026442A true US3026442A (en) 1962-03-20

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ID=19751438

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US845141A Expired - Lifetime US3026442A (en) 1958-11-19 1959-10-08 Flexible connection between two aligned conductors one of which is sealed into the glass wall of a discharge tube

Country Status (4)

Country Link
US (1) US3026442A (enrdf_load_stackoverflow)
DE (1) DE1094372B (enrdf_load_stackoverflow)
GB (1) GB926910A (enrdf_load_stackoverflow)
NL (2) NL98966C (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3114069A (en) * 1960-10-14 1963-12-10 Sylvania Electric Prod Incandescent lamp with vibration damping support for filament
US3543078A (en) * 1967-06-19 1970-11-24 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Vibration-proof incandescent halogen electric lamp for optical systems avoiding stray light

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1161823A (en) * 1915-11-23 Cooper Hewitt Electric Co Terminal connection for lamp-filaments.
US1863390A (en) * 1928-12-27 1932-06-14 Gen Electric Electric discharge device
US1932677A (en) * 1931-10-13 1933-10-31 Patent Engineering Corp Thermionic device
DE805405C (de) * 1947-11-18 1951-05-17 Hendrik Arend Hidde Nijland Hochspannungsschalter, insbesondere Schub-Trennschalter

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1161823A (en) * 1915-11-23 Cooper Hewitt Electric Co Terminal connection for lamp-filaments.
US1863390A (en) * 1928-12-27 1932-06-14 Gen Electric Electric discharge device
US1932677A (en) * 1931-10-13 1933-10-31 Patent Engineering Corp Thermionic device
DE805405C (de) * 1947-11-18 1951-05-17 Hendrik Arend Hidde Nijland Hochspannungsschalter, insbesondere Schub-Trennschalter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3114069A (en) * 1960-10-14 1963-12-10 Sylvania Electric Prod Incandescent lamp with vibration damping support for filament
US3543078A (en) * 1967-06-19 1970-11-24 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Vibration-proof incandescent halogen electric lamp for optical systems avoiding stray light

Also Published As

Publication number Publication date
NL98966C (enrdf_load_stackoverflow)
NL233389A (enrdf_load_stackoverflow)
GB926910A (en) 1963-05-22
DE1094372B (de) 1960-12-08

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