US2229772A - Vacuum tube device - Google Patents

Vacuum tube device Download PDF

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Publication number
US2229772A
US2229772A US257591A US25759139A US2229772A US 2229772 A US2229772 A US 2229772A US 257591 A US257591 A US 257591A US 25759139 A US25759139 A US 25759139A US 2229772 A US2229772 A US 2229772A
Authority
US
United States
Prior art keywords
envelope
tube device
vacuum tube
metallic
tube
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
US257591A
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English (en)
Inventor
Scharfnagel Rudolf
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.)
Alcatel Lucent Deutschland AG
C Lorenz AG
Original Assignee
Standard Elektrik Lorenz AG
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 Standard Elektrik Lorenz AG filed Critical Standard Elektrik Lorenz AG
Application granted granted Critical
Publication of US2229772A publication Critical patent/US2229772A/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
    • H01J5/00—Details relating to vessels or to leading-in conductors common to two or more basic types of discharge tubes or lamps
    • H01J5/02—Vessels; Containers; Shields associated therewith; Vacuum locks
    • H01J5/04—Vessels or containers characterised by the material thereof

Definitions

  • This invention relates to vacuum tube devices, and more particularly to electron discharge devices having a metallic envelope.
  • metallic materials or metals constituting such an envelope must satisfy a variety of requirements.
  • Such metals must in the rst instance be capable of being intimately united with an insulating fusible melt, such as glass, so as to form a perfect vacuum seal either when jointed to a member of insulation, such as a ceramic substance, or when the vitreous melt serves as protective insulation for lead-in conductors be 2o ing carried through the metallic envelope.
  • the metals themselves must be perfectly vacuum-tight and of such nature that Vno gases are produced therein when heated to high temperaturesduring the operation of the electron discharge device. These requirements are particularly dicult to satisfy when the necessary sealing operations are made by means of materials having a very high melting point. However, such refractory materials are preferred in order to obviate injuries to the sealed joints 0 or points, even at the highest operating temperatures.
  • a tube envelope of a material with the above stated composition involves the essential advantage that its surface remains unaffected during operation, while on 10 the other hand this material is easily and reliably fusible with glass.
  • the accompanying drawing shows one embodiment of an electron discharge device to which the above identied invention has been applied.
  • the discharge device thus shown has a cylindrical member I of a steel material of the above mentioned composition and this member simultaneously acts as envelope of the device and as anode of the electrode system thereof.
  • One end of the member I is closed by a cover 2 of a 20 ceramic substance and the joint between the member I and the cover 2 is coated by a vitreous melt 3.
  • the other electrodes, that is, a grid 4 and a cathode 5 are sealed in the said cover 2 and the seals thus obtained are likewise coated 25 by the vitreous melt 3.
  • the end of the cylinder I remote from the cover 2 is provided with a cap 6 of glass sealed, thereto.
  • This cap carries in its inner portion the getter material supporting means and forms the pipe by means of which the tube is connected to the vacuum pump. This pipe (not shown) is removed by sealing at the end of the evacuation.
  • a vacuum tube device comprising, a metallic envelope, closing means therefor, an electrode system partially formed by said metallic envelope and partially by individual electrodes sealed in either of said closing means and extending into said tube device, the said metallic envelope being made of steel which contains .8 per cent carbon and an additional amount of molybdenum and lchromium of substantially 10 per cent.
  • a vacuum tube device comprising, a cylindrical metallic envelope, a closing member of a ceramic material at one end of said envelope, a cap-shaped member of glass closing the other end of said envelope and carrying the getter material supporting means, an electrode system partially formed by said cylindrical metallic envelope and partially by individual electrodes sealed in said closing member and extending into said tube device, the said metallic envelope being made of steel which contains .8 per cent carbon and an additional amount of molybdenum and chromium of substantially 10 per cent.

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  • Gas-Filled Discharge Tubes (AREA)
US257591A 1938-02-25 1939-02-21 Vacuum tube device Expired - Lifetime US2229772A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE208248X 1938-02-25

Publications (1)

Publication Number Publication Date
US2229772A true US2229772A (en) 1941-01-28

Family

ID=5794142

Family Applications (1)

Application Number Title Priority Date Filing Date
US257591A Expired - Lifetime US2229772A (en) 1938-02-25 1939-02-21 Vacuum tube device

Country Status (3)

Country Link
US (1) US2229772A (de)
CH (1) CH208248A (de)
FR (1) FR850703A (de)

Also Published As

Publication number Publication date
FR850703A (fr) 1939-12-23
CH208248A (de) 1940-01-15

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