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US1916408A - Electric discharge tube - Google Patents

Electric discharge tube Download PDF

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Publication number
US1916408A
US1916408A US255211A US25521128A US1916408A US 1916408 A US1916408 A US 1916408A US 255211 A US255211 A US 255211A US 25521128 A US25521128 A US 25521128A US 1916408 A US1916408 A US 1916408A
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US
United States
Prior art keywords
discharge tube
cathode
electric discharge
tube
rectifier
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
US255211A
Inventor
Bol Cornelis
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RCA Corp
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RCA Corp
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Filing date
Publication date
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Publication of US1916408A publication Critical patent/US1916408A/en
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    • 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
    • H01J1/20—Cathodes heated indirectly by an electric current; Cathodes heated by electron or ion bombardment

Definitions

  • the invention relates to electric discharge tubes, more particularly to those for use in installations for wireless telephony and teleg-
  • vacuum tubes it is known to mount the oscillation generator and the am- I plifier in a common vacuum. In such a system one single filament is utilized for the generator and the amplifier.
  • the discharge tube according to the invention comprises a plurality of mutually separated sets of grids with anodes pertaining thereto and a common equipotential cathode.
  • the varioussystems are separted from one another by screening walls in order to prevent reaction of one system on another.
  • this combination can be used as a rectifier.
  • This rectifier may then be used, for example, in anode voltage supply apparatus.
  • FIG. 1 diagrammatically represents a discharge tube according to the invention.
  • An equipotential cathode 2 which, according to this mode of execution, consists of a hollow tube which can be heated by radiation or by electron bombardment or in both imannersby means of a heating element 3.
  • the outer surface of the tube is coated with a suitable material, for example, barium oxide.
  • the combination of the filament 3 with the hollow tube 2 is very suitable for use as a rectifier.
  • the electrode systems may be constructed as diflerent stages in a receiving circuit-ar rangement for wireless telegraphy or telephony, but it is also possible to use them in series-connection.
  • An electron discharge tube comprising an envelope having mounted therein a single tubular cathode, a single heating element within the cathode, a plurality of sets of electrodes, each-set comprising an independent pair of concentric cylindrical input and output electrodes surrounding and coaxial with said cathode and disposed end to end along said cathode to cooperate with distinct and separate lengths of said cathode, and a shielding disk between adjacent sets and extending from the envelope to the cathode.
  • An electron discharge tube comprising to the cathode.

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Description

c. BOL. 1,916,4C8
ELECTRIC DISCHARGE TUBE Filed Feb. 18, 1928 INVENTOR comsus BOL BY (9/ M ,Qdmm
ATT RNEY raphy.
Patented duly 4, 1933 CORNELIS 301:, GP EINDHOVEN, NETEEBLANDQ, ASSIGNQR TO RADIU GQIEtlPOMTION 0F MERICA, A GOREOEATIOET 0K DEEAWABE ELECTRIC DISCHARGE TUBE Application filed February 18, 1928, Serial No. 55,211, and. in the Netherlands April 18, 1927.
The invention relates to electric discharge tubes, more particularly to those for use in installations for wireless telephony and teleg- In the case of vacuum tubes it is known to mount the oscillation generator and the am- I plifier in a common vacuum. In such a system one single filament is utilized for the generator and the amplifier.
The discharge tube according to the invention comprises a plurality of mutually separated sets of grids with anodes pertaining thereto and a common equipotential cathode. The varioussystems are separted from one another by screening walls in order to prevent reaction of one system on another.
In addition to other advantages the use of an equipotential cathode afiords with relation to the filament the further advantagethat when use is made of a hollow cathode with a heating element, this combination can be used as a rectifier. This rectifier may then be used, for example, in anode voltage supply apparatus.
The invention will be more clearly understood by referring to the accompanying drawing which diagrammatically represents a discharge tube according to the invention. In the drawing, several electrode systems are mounted ina glass envelope 1. An equipotential cathode 2 which, according to this mode of execution, consists of a hollow tube which can be heated by radiation or by electron bombardment or in both imannersby means of a heating element 3. The outer surface of the tube is coated with a suitable material, for example, barium oxide.
shields which separate the various systems from one another. The combination of the filament 3 with the hollow tube 2 is very suitable for use as a rectifier.
The electrode systems may be constructed as diflerent stages in a receiving circuit-ar rangement for wireless telegraphy or telephony, but it is also possible to use them in series-connection.
What I claim is:
1. An electron discharge tube comprising an envelope having mounted therein a single tubular cathode, a single heating element within the cathode, a plurality of sets of electrodes, each-set comprising an independent pair of concentric cylindrical input and output electrodes surrounding and coaxial with said cathode and disposed end to end along said cathode to cooperate with distinct and separate lengths of said cathode, and a shielding disk between adjacent sets and extending from the envelope to the cathode.
2. An electron discharge tube comprising to the cathode.
CORNELIS BOL.
US255211A 1927-04-13 1928-02-18 Electric discharge tube Expired - Lifetime US1916408A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1916408X 1927-04-13

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US1916408A true US1916408A (en) 1933-07-04

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US255211A Expired - Lifetime US1916408A (en) 1927-04-13 1928-02-18 Electric discharge tube

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US (1) US1916408A (en)
NL (1) NL21422C (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2432260A (en) * 1945-01-18 1947-12-09 Albert G Thomas Electronic switch
US2453078A (en) * 1940-12-05 1948-11-02 Hartford Nat Bank & Trust Co Device for wave length transformation of very short waves
US2534688A (en) * 1943-03-11 1950-12-19 Products & Licensing Corp Multiunit electron discharge tube
US2629757A (en) * 1943-11-08 1953-02-24 Warren Dunham Foster Method of construction of sensitive thermopiles
US2852690A (en) * 1945-11-29 1958-09-16 Ernest O Lawrence Calutrons

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2453078A (en) * 1940-12-05 1948-11-02 Hartford Nat Bank & Trust Co Device for wave length transformation of very short waves
US2534688A (en) * 1943-03-11 1950-12-19 Products & Licensing Corp Multiunit electron discharge tube
US2629757A (en) * 1943-11-08 1953-02-24 Warren Dunham Foster Method of construction of sensitive thermopiles
US2432260A (en) * 1945-01-18 1947-12-09 Albert G Thomas Electronic switch
US2852690A (en) * 1945-11-29 1958-09-16 Ernest O Lawrence Calutrons

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Publication number Publication date
NL21422C (en)

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