US2035784A - Electron discharge apparatus - Google Patents

Electron discharge apparatus Download PDF

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Publication number
US2035784A
US2035784A US678974A US67897433A US2035784A US 2035784 A US2035784 A US 2035784A US 678974 A US678974 A US 678974A US 67897433 A US67897433 A US 67897433A US 2035784 A US2035784 A US 2035784A
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US
United States
Prior art keywords
anodes
cathode
envelope
discharge
glow
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
US678974A
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English (en)
Inventor
Bol Cornelis
Groot Willem De
Mari J Druyvesteyn
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
Application filed by General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of US2035784A publication Critical patent/US2035784A/en
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/70—Lamps with low-pressure unconstricted discharge having a cold pressure < 400 Torr

Definitions

  • the present invention relates to electron discharge apparatus, more particularly to glow discharge tubes used for illumination purposes.
  • two or more discharge paths may be successfully operated in parallel without theimpedance connection, provided the paths'are contained in a single envelope and have a common glow cathode. In this case, the anodes are conveniently connected together.
  • numeral l designates 9. cylindrical envelope which is provided with a circular nick or groove Zinterm'ediate of its length and which terminates at the bottom in a reentrant stem 3 and a press 4. Within the envelope,
  • a filamentary cathode 5 positioned preferably approximately mid-way between the upper end of the envelope and the groove 2.
  • This cathode may be constituted of a tungsten helix and is supported from the press 4 by means of rigid leading-in conductors 6 which are surrounded over a portion of their lengths by sleeves I of insulating material, such as glass or alumina.
  • the helix is mounted in a position preferably at right angles to the longitudinal axis of the tube, as shown, and may be coated, if desired, with electron-emitting material.
  • anodes 8 On opposite sides of the cathode 5, preferably 5 at equal distances therefrom, there are we pair of anodes 8 which may take the form of a flat metal plate.
  • the anodes are so mounted as to be in transverse planes, parallel to the plane of the filament 5.
  • the anodes are supported from 1 the press by means of rigid leading-in conductors 9 which are surrounded over substantially their entire lengths by tubes In of insulating material which rest at their lower ends on the upper surface of the pressd.
  • the various leading-in conductors are taken through the press 4 to the exterior by means of wires of suitable material which permit of hermetic sealing.
  • the two anode conductors are connected together, either outside the tube as 20 shown, or within the envelope.
  • the discharge tube contains a quantity of rare gas such as neon at a pressure of about one millimeter or, if desired, a light-producing vapor such as sodium may also be used to advantage, 25 I in which case a quantity of metallic sodium is placed in the upper part of the tube.
  • This part of the envelope is separated and closed off from the lower part by a partition ll of insulating material which serves to prevent condensation of. 30 the sodium vapor about the stem in the lower part of the tube.
  • the cathode 5 During operation, a glow discharge is produced between the cathode 5 and each of the anodes 8 and, notwithstanding the fact that the discharge 35 negative voltampere characteristic, it is found that the discharge flows to both of the anodes even without 't use of external current-equalizing imped- As a result, the light emitting discharge 40
  • the ignition or starting voltage also the operating voltage, are determined by the distance between the cathode and the anode which may be positioned closer to the cathode. In the case of 5 the tube as illustrated, in which the anodes are positioned at equal distances from the cathode, the ignition and operating voltages are determined by one-half of the spacing between the anodes even though the discharge takes place 50 over the entire length of the tube.
  • An electric dischargedevice comprising an envelope containing a filamentary cathode, a 55 material, said anodes being mounted at substantially equal distances on opposite sides of the cathode and being directly connected together electrically.
  • a glow lamp having an envelope of elonated configuration, said envelope containing a thermionically active cathode, a plurality of anodes and ionizable material, said anodes being mounted near the extremities of the tube, and
  • a glow lamp comprising an envelope terminating in a reentrant stem, a partition extending across said envelope for separating the stem from the main portion of the envelope, a cathode, a pair of anodes and vaporizable, ionizable material in said main envelope portion, said electrodes being supported from said stem, said anodes being mounted on opposite sides of said cathode and being electrically connected together.
  • a glow lamp comprising an envelope terminating in a reentrant stem, a partition extending across said envelope for separating the stem from the main portion of the envelope, a cathode, a pair of anodes and vaporizable, ionizable material in said main envelope portion, said electrodes being supported from said stem and said anodes being mounted on opposite sides of said cathode at equal distances therefrom and being electrically connected together.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamp (AREA)
US678974A 1932-06-30 1933-07-03 Electron discharge apparatus Expired - Lifetime US2035784A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL410621X 1932-06-30

Publications (1)

Publication Number Publication Date
US2035784A true US2035784A (en) 1936-03-31

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ID=19785980

Family Applications (1)

Application Number Title Priority Date Filing Date
US678974A Expired - Lifetime US2035784A (en) 1932-06-30 1933-07-03 Electron discharge apparatus

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Country Link
US (1) US2035784A (xx)
BE (1) BE396723A (xx)
NL (2) NL38670C (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2745988A (en) * 1950-04-13 1956-05-15 Hartford Nat Bank & Trust Co Glow discharge tube and circuit therefor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2745988A (en) * 1950-04-13 1956-05-15 Hartford Nat Bank & Trust Co Glow discharge tube and circuit therefor

Also Published As

Publication number Publication date
NL61705B (xx)
NL38670C (xx)
BE396723A (xx)

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