US1654513A - Electron-emission device - Google Patents

Electron-emission device Download PDF

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Publication number
US1654513A
US1654513A US407664A US40766420A US1654513A US 1654513 A US1654513 A US 1654513A US 407664 A US407664 A US 407664A US 40766420 A US40766420 A US 40766420A US 1654513 A US1654513 A US 1654513A
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US
United States
Prior art keywords
filament
resistances
anode
valve
current
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
US407664A
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English (en)
Inventor
Round Henry Joseph
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.)
RCA Corp
Original Assignee
RCA 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 RCA Corp filed Critical RCA Corp
Application granted granted Critical
Publication of US1654513A publication Critical patent/US1654513A/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
    • H01J1/135—Circuit arrangements therefor, e.g. for temperature control

Definitions

  • one end of the filament is connected through a circuit to the anode and in consequence when the power is such 1 5 that the electronic emission current is comparable with the current employed for heating the filament the latter is unevenly heated owing to the fact that the emission current varies at difierent points of the filament.
  • the heating I connect to the filament at a number of points evenly spaced along it a number of resistances, the other ends of which are connected together and form the cathode terminal.
  • These resistances must be sufiiciently large to prevent portions of the filament being short circuited.
  • the emission current may be divided approximately uniformly between the resistances and the heating of the filament may thus be made much more uniform.
  • the resistances and their common junction are preferably placed inside the valve so that only one additional seal is necessary.
  • My invention is illustrated by the accompanying diagram which shows a zig zag filament A having resistances B connected to it at various points, their other ends being connected to a lead 0 the middle point of which is connected through the usual form of circuit to the anode D.
  • a thermionic valve having filament and anode electrodes adapted to carry space currents, a circuit connected 4o therebetween, a direct current source of heating current for the filament and a pair of resistances connected in said circuit for carrying the space currents to the filament, each having one end connected to a different point of the filament and their other ends connected to the said circuit.
  • a thermionic valve having filament and anode electrodes arranged to carry space currents in a circuit therebetween, a source of direct current connected to the filament for heating it and a pair of resistances connected in said circuit for carrying the space current to the filament, said resistances having a common point of connection and the other ends of each being and to said source.
  • resistances connected in said circuit for carrying the current to the filament, said resistances havin a common point of connection and the 05181 ends of each being connected to different points of the filament and to said source, and a source of space current connected between said common point and said anode.
  • a thermionic valve having filament and anode electrodes arranged to carry space current in a circuit therebetween, a source of direct current for heating said filament, a resistance connected to an intermediate point of said filament and a source of current having one terminal connected to said anode and the other terminal connected to both ends of the filament and also to said intermediate point through said resistance.
  • a thermionic valve comprising an enclosure, a filament and an anode, arranged to carry siplace current therebetween, a source of anode lament current and a plurality of resistances in said enclosure, adapted to be connected to the. source of anode filament current, said resistances being connected to difierent points'of the filament for carrying space current thereto.
  • a thermionic valve comprising an enclosure having a filament, an anode and a plurality of resistances therein connected to different points of the filament for distributing the anode-filament space current along the filament.
  • thermionic valve the combination with a filament and an anode for said valve of a resistance means within the valve for distributing the anode filament space current 100 along the filament.
  • a themionic valve the combination with a filament and an anode for said valve of three or more resistances and means connecting together one end of each resistance, 1 the other ends of the resistances being connected to different points on the filament.
  • a combination with a filament and an anode for said valve mounted in an enclosure of three or more resistances, a lead connecting together one end of each resistance and mounted in the enclosure, the other ends of the resistances being connected to different points of the filament.
  • a thermionic valve in combination, a filament and an anode for sa1d valve, three or more resistances of substantially equal HENRY JOSEPH ROUND.

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  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Resistance Heating (AREA)
US407664A 1919-09-03 1920-09-02 Electron-emission device Expired - Lifetime US1654513A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB21594/19A GB154982A (en) 1919-09-03 1919-09-03 Improvement in valves used for wireless transmission

Publications (1)

Publication Number Publication Date
US1654513A true US1654513A (en) 1927-12-27

Family

ID=10165535

Family Applications (1)

Application Number Title Priority Date Filing Date
US407664A Expired - Lifetime US1654513A (en) 1919-09-03 1920-09-02 Electron-emission device

Country Status (4)

Country Link
US (1) US1654513A (enrdf_load_stackoverflow)
FR (1) FR523613A (enrdf_load_stackoverflow)
GB (1) GB154982A (enrdf_load_stackoverflow)
NL (1) NL7572C (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424526A (en) * 1943-01-11 1947-07-22 Gen Electric Electric discharge device
US2488948A (en) * 1947-11-28 1949-11-22 Bell Telephone Labor Inc Repeatered transmission system, including multifilament amplifiers

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2424526A (en) * 1943-01-11 1947-07-22 Gen Electric Electric discharge device
US2488948A (en) * 1947-11-28 1949-11-22 Bell Telephone Labor Inc Repeatered transmission system, including multifilament amplifiers

Also Published As

Publication number Publication date
GB154982A (en) 1920-12-03
NL7572C (enrdf_load_stackoverflow)
FR523613A (fr) 1921-08-20

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