US2159712A - Electron ray tube - Google Patents

Electron ray tube Download PDF

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Publication number
US2159712A
US2159712A US721578A US72157834A US2159712A US 2159712 A US2159712 A US 2159712A US 721578 A US721578 A US 721578A US 72157834 A US72157834 A US 72157834A US 2159712 A US2159712 A US 2159712A
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US
United States
Prior art keywords
picture
plane
tube
anode
electron
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
US721578A
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English (en)
Inventor
Schiff Ludwig
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.)
Firm Fernseh A G
Firm Fernseh A-G
Original Assignee
Firm Fernseh A G
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 Firm Fernseh A G filed Critical Firm Fernseh A G
Application granted granted Critical
Publication of US2159712A publication Critical patent/US2159712A/en
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
    • C25D7/00—Electroplating characterised by the article coated
    • C25D7/04—Tubes; Rings; Hollow bodies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F1/00—Cylinders; Cylinder heads 
    • F02F1/18—Other cylinders
    • F02F1/20—Other cylinders characterised by constructional features providing for lubrication
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/46—Arrangements of electrodes and associated parts for generating or controlling the ray or beam, e.g. electron-optical arrangement
    • H01J29/58—Arrangements for focusing or reflecting ray or beam
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen

Definitions

  • the invention relates to electron ray tubes for the purposes of television, of picture telegraphy and the like.
  • the electron ray tubes can be employed both for transmission and also for recep- 5. tion.
  • the electron rays are so synchronously distributed that the pictures are scanned in a harmonious manner.
  • Electron-optics have been based, which have been employed for the attainment of one or more stages of enlargement of a real electronimage especially for the construction of electron microscopes. In this connection, however, it is always a question of the enlargement of still images, not for the purposes of television or of picture telegraphy, in which the object or the picture is transmitted by dots and scanned by dots.
  • a real still electron image which is to be enlarged in one or more stages, is not generally present e. g. in reception apparatus for the purposes of television and picture telegraphy, but the bright or dark electron-image elements corresponding to the scanning are obtained consecutively only by dots in the plane of the real image.
  • Fig. 1 shows an electron ray tube which is ap
  • the vacuum tube which is widenedlike a funnel at its lower end I l.
  • the electrons are produced by the cathode filaments l2 and urged to the anode l3 by the tension of the battery l4 disposed between the anode and the cathode.
  • the pencil of electron rays leaving the anode I3 is now according to the invention concentrated by the collecting coil l5 not in the plane i6 closing the tube but in a plane I! lying in the inner tube, the first pictureplane.
  • the pencil of rays is now so deflected by the pairs of electrodes l8, I9, in a manner known per se, that the focus describes a sinuous or zig-zag line in the first picture planei l.
  • the image of these lines is now reproduced on an enlarged scale in the plane liiby means of the exactly adjustable collecting coil 20.
  • on which the. picture 22 to be transmitted is reproduced by. means of a glass lens 23 in known manner.
  • the powerful current impulses corresponding to thedifferent brightness of the individual image points are led through the common anode 24 in known manner to the grid of an amplifying tube25 and applied, e. g., to the modulation of a highirequency transmitter.
  • the advantage of the invention lies for an equal length of tube in a greater number. of photo cells being ableto .be obtained and. thus a finer screening of the picture to be transmitted.
  • Fig. 2 illustrates another construction of a transmission tube for television.
  • a proportionately small image of the subject 22 to be .transmitted is projected onto the photoelectric layer (cathode) 21 through the Window 26 of the tube by-the lens 23.
  • the electrons leaving, ingreater or smaller number each according to their strengthofiillumination the individual points of the photo-electric layer 2'lwhich represent an electron image corresponding to the opticalimage, are urged-from the grid anode 28-by the. tension of the battery M.
  • the photo-electric layer 2? here represents the first picture plane.-The electronimage of the first picture plane isin contrast'to-the arrangement illustrated in Fig.
  • the intense enlargement by the collecting coil 20 advanced very near to the cathode 21 permits of keeping very small the image surface 21 and therefore the cross section of the pencil of rays leaving it which renders possible small proportions and small capacity of the deflecting plates.
  • the transmission tube is only a proportionally short length of construction.
  • Fig. 3 illustrates a reception-tube 30 which is widened funnel-like at its lower part 3
  • An electron ray tube for the purposesof television, picture telegraphyand the like comprising in combination an evacuated container, means for producing in said container in spaced planes a plurality'of electron images one of which is an enlargement of another, said means comprising a cathode filament, an anode, an electric current supply means connected between said cathode filament and said anode, a first collecting coil between said anode and the first image plane of the tube, pairs olf deflecting electrodes between said coil and the first image plane of said tube, and an adjustable second collecting coil between said first image plane and the second image plane of the tube.
  • An electron ray tube for the purposes of television picture telegraphy and the like comprising in combination an evacuated container, means for producing in said container in spaced planes-a plurality of electron images one of which is an enlargement of another, said means comprising a cathode filament, ananode, an electric current supply meanselectrically connected between said cathode and said anode, a first collecting coil between said anode and the-first image plane of the tube, pairs of deflecting electrodes between said coil and said first image plane ofthe tube, a second adjustable collecting coil between said first image plane and a photo-electric device in the second image plane of the tube, an anode for saidphoto-electric device, an amplifier electrically connected to said photo-electric device, and an optical device for reproducing on said photo-electric device the picture to be transmitted.
  • An electron ray tube for the purposes of television, picture telegraphy and the like comprising in combination an evacuated container, means for producing in said container in spaced picture planes a plurality of electron images one of which is 7 an enlargement of another, said means comprising a cathode photo-electric device in the first picture plane of the tube, an
  • anode an electric current supply means electrically connected between said cathode and said anode, pairs of deflecting electrodes between said anode and the second picture plane of the tube, a collecting coil between said anode and said defleeting electrodes, a fixed electrode in said second picture plane, an amplifier electrically connected to said fixed electrode, and an optical device for reproducing on said photo-electric device the picture to be transmitted.
  • An electron ray tube for the purposes of television, picture telegraphy and the like comprising in combination an evacuated container, means for producing in said container in spaced picture planes a plurality of electron images one of which is an enlargement of another, said means comprising a cathode filament, an anode, an electric current supply means connected between said cathode and said anode, a first collecting coil between said anode and the first picture plane of the tube, means for adjusting the intensity of the electron rays in accordance with the rhythm of the current fluctuations arriving from the transmitter, pairs of deflecting electrodes between said coil and the first picture plane of the tube, and an adjustable second collecting coil between said first picture plane and the second picture plane of the tube.
  • An electron ray tube for the purposes of television, picture telegraphy and the like comprising in combination an evacuated container, means for producing in said container in spaced picture planes a plurality of electron images one of which is an enlargement of another, said means comprising a cathode photo-electric device in the first picture plane of said tube, a grid anode, an electric current supply means electrically connected between said cathode device and said grid anode, pairs of deflecting electrodes between said anode and the second picture plane of the tube, a collecting coil between said anode and said deflecting electrodes, a fixed electrode in said second picture plane, an amplifier electrically connected to said fixed electrode, a lateral window in said container, and an optical device for reproducing through said window on said photo-electric device the picture to be transmitted.
  • An electron ray tube for the purposes of television, picture telegraphy and the like comprising in combination an evacuated container,
  • said means comprising a cathode filament, an anode, an electric current supply means electrically connected between said cathode and said anode, a first collecting coil between said anode and the first picture plane of the tube, a screen between said anode and said first collecting coil, regulating means between said anode and said screen, pairs of deflecting electrodes between said coil and the first picture plane of the tube, and an adjustable second collecting coil between said first picture plane and the second picture plane of the tube.
  • An electron ray tube for the purposes of television, picture telegraphy and the like comprising in combination an evacuated container having a widening like a funnel at one end, means for producing in said container in spaced planes a plurality of electron images one of which is an enlargement of another, said means comprising a cathode filament, an anode, an electric current supply means electrically connected between said cathode and said anode, a first collecting coil between said anode and the first image plane of the tube, pairs of deflecting electrodes between said coil and said first image plane, a second, adjustable collecting coil between said first image plane and a photocell device adjacent the outer end of the funnel part of the container in the second image plane of the tube, an anode for said photocell device, an amplifier electrically connected to said photocell device, and a glass lens device for reproducing on said photocell device the picture to be transmitted.
  • An electron ray tube for the purposes of television, picture telegraphy and the like comprising in combination an evacuated container, means for producing in said container in spaced picture planes a plurality of electron images one of which is an enlargement of another, said means comprising a cathode photo-electric device in the first picture plane of the tube, an anode, an electric current supply means electrically connected between said cathode and said anode, deflecting means located between said anode and the second picture plane of the tube, an electric lens between said anode and said deflecting means, a fixed electrode in said second picture plane, an amplifier electrically connected to said fixed electrode, and an optical device for reproducing on said photo-electric device the picture to be transmitted.
  • Apparatus for television, picture telegraphy and the like comprising in combination, an evacuated container, means for establishing an electron beam within said container, an electric lens for focusing said beam in a plane in said container,. scanning means located between the source of said beam and said plane for sweeping said beam over an extended area in said plane, and a second electric lens arranged to act upon the beam proceeding from said plane to focus said scanned beam on an enlarged area in a second plane within said container.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
US721578A 1931-08-08 1934-04-20 Electron ray tube Expired - Lifetime US2159712A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2159712X 1931-08-08

Publications (1)

Publication Number Publication Date
US2159712A true US2159712A (en) 1939-05-23

Family

ID=40578118

Family Applications (1)

Application Number Title Priority Date Filing Date
US721578A Expired - Lifetime US2159712A (en) 1931-08-08 1934-04-20 Electron ray tube

Country Status (4)

Country Link
US (1) US2159712A (fr)
FR (1) FR770304A (fr)
GB (1) GB439737A (fr)
NL (1) NL40429C (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454345A (en) * 1945-05-25 1948-11-23 Rudenberg Reinhold Cathode-ray deflection tube with electron lenses

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE884507C (de) * 1934-05-12 1953-07-27 Emi Ltd Speichernder Kathodenstrahlbildabtaster mit einer vom ein- oder zweiseitigen Mosaikschirm getrennt angeordneten zusammen-haengenden Photokathodenschicht
DE884511C (de) * 1936-08-21 1953-07-27 Fernseh Gmbh Fernsehaufnahmeverfahren

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454345A (en) * 1945-05-25 1948-11-23 Rudenberg Reinhold Cathode-ray deflection tube with electron lenses

Also Published As

Publication number Publication date
FR770304A (fr) 1934-09-11
NL40429C (fr) 1937-04-15
GB439737A (en) 1935-12-09

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