US1937846A - Thermionic tube - Google Patents

Thermionic tube Download PDF

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Publication number
US1937846A
US1937846A US101268A US10126826A US1937846A US 1937846 A US1937846 A US 1937846A US 101268 A US101268 A US 101268A US 10126826 A US10126826 A US 10126826A US 1937846 A US1937846 A US 1937846A
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US
United States
Prior art keywords
cathode
anode
tube
radius
electrode
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
US101268A
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English (en)
Inventor
Rudenberg Reinhold
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.)
Westinghouse Electric Corp
Original Assignee
Westinghouse Electric Corp
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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Application granted granted Critical
Publication of US1937846A publication Critical patent/US1937846A/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
    • H01J21/00—Vacuum tubes
    • H01J21/02—Tubes with a single discharge path
    • H01J21/06—Tubes with a single discharge path having electrostatic control means only
    • H01J21/10—Tubes with a single discharge path having electrostatic control means only with one or more immovable internal control electrodes, e.g. triode, pentode, octode

Definitions

  • Fig. 6 is a diagram illustrating the distribution particularly to high-power tubes such as are used of potentials in the structure shown in Fig. and in radio broadcasting stations.
  • Fig. 7 is a longitudinal section through a water- It is an object of my invention to protect the cooled tube embodying my invention. 5 cathodes of vacuum tubes from mechanical As illustrated in Fig. 1, a vacuum tube is usu- 55 stresses resulting from electrostatic forces.
  • cathode 2 having the form of two parallel heated vacuum tubes having a supplementary electrode sections of filament.
  • the electro-static field bewhich shall produce a field tending to neutralize tween the anode and the two-part cathode will 10 the field of the anode at the cathode, not be symmetrical about the axis of the tube 60
  • these foreesresult i sufiicient vide concentric electrodes having such respective stress to materially lessen the life of the fila- 65 radii that the cathode shall be located where ent. r the mechanical stressesupon it will be a mini- S t at d in a S pp e de mum. comprised of two portions 3 and 4 is provided.
  • the cathode in one form of my invention, is This electrode is maintained at such potential preferably an assembly of filaments forming a that its field tends to neutralize the mechanical 7 cylindrical surface.
  • the radius 3 u trat s another form of the device in of the cathode-assembly shall be the geometric which 1 Single b y 5,1heihteihed at the potential. mean between the radii of the anode and of the j described, neutralizes the mechanical supplemental electrode.
  • Fig. 4 is a similar diagram illustrating still another form
  • Fig. 5 is a similar diagram illustrating the form of the device when the cathode filaments are c 50 very numerous; r a
  • Equation 8 the cathode radius is given by Equation 8 as follows 7 that is, it is equal to the geometric mean of the two anode. radii.
  • the incandescent cathode and the inner member are in the form of two concentric cylinders, we have the further advantage that-the tube can be easily cooled, as by surrounding the outer side of the outer anode and the inner side of the hollow inner member with a cooling fluid and Fig. 7 shows such an electron tube.
  • the inner cylinder 52 located concentrically with the outer anode 1, is of pot shape, and as the inner cylinder and the outer anode are energized at the same voltage, they may merge into each other at their lower edges.
  • the tube is provided with, a cover 6, which is traversed by a cooling, fluid. Close to the interior of the cylinder 52, there is provided a tube 7 and at the top of the cover 6 is an additional tube 8 for the circulation of the cooling fluid.
  • the outer anode 1 is fused into a glass member 9, in well .known manner, and which member is provided on an inner portion with the means for supporting the cathode wires.
  • the incandescent wire may be located in any desired manner at the surface of the cylinder having the radius 7'0, either along the surface longitudinally thereof, or spirally around the cylinder.
  • the individual portions of the wire may be connected in series or in parallel, in order to avoid excessive voltage differences along the wire and the resulting unequal effects on the electron emission.
  • a vacuum-tube device comprising a cathode in circular symmetry about the axis of the tube, a cylindrical anode coaxial therewith, a cylindrical electrode also coaxial therewith said cathode'being between said anode and said electrode the radius of the cathode being approximately the geometrical means of the radii of the anode and the electrode.
  • a vacuum tube comprising a cathode, an evacuated envelope, said envelope comprising an anode having a metallic reentrant portion, a water jacket surrounding said anode, and a water pipe extending into said reentrant portion and cooperating with said water jacket to'provide circulation of water over all the surface of said anode, the cathode being between a portion of said anode and said reentrant portion.
  • a vacuum-tube device having three concentric electrodes each of circular cross section, the middle electrode beingmechanically weaker than either of the other electrodes wherein the radii of the respective electrodes are proportioned to fit in the formula 1 B EJE' 12 E2 log;

Landscapes

  • Electron Sources, Ion Sources (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
US101268A 1925-06-15 1926-04-12 Thermionic tube Expired - Lifetime US1937846A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE253505X 1925-06-15

Publications (1)

Publication Number Publication Date
US1937846A true US1937846A (en) 1933-12-05

Family

ID=5953326

Family Applications (1)

Application Number Title Priority Date Filing Date
US101268A Expired - Lifetime US1937846A (en) 1925-06-15 1926-04-12 Thermionic tube

Country Status (4)

Country Link
US (1) US1937846A (enrdf_load_stackoverflow)
FR (1) FR616295A (enrdf_load_stackoverflow)
GB (1) GB253505A (enrdf_load_stackoverflow)
NL (1) NL23247C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3243624A (en) * 1963-06-14 1966-03-29 Varian Associates Electron tube and socket

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3243624A (en) * 1963-06-14 1966-03-29 Varian Associates Electron tube and socket

Also Published As

Publication number Publication date
NL23247C (enrdf_load_stackoverflow)
GB253505A (en) 1927-08-18
FR616295A (fr) 1927-01-31

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