GB560904A - Improvements in television transmitting tubes - Google Patents

Improvements in television transmitting tubes

Info

Publication number
GB560904A
GB560904A GB12097/42A GB1209742A GB560904A GB 560904 A GB560904 A GB 560904A GB 12097/42 A GB12097/42 A GB 12097/42A GB 1209742 A GB1209742 A GB 1209742A GB 560904 A GB560904 A GB 560904A
Authority
GB
United Kingdom
Prior art keywords
target
multiplier
plates
gun
scanning
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
Application number
GB12097/42A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
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 Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB560904A publication Critical patent/GB560904A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01J31/26—Image pick-up tubes having an input of visible light and electric output
    • H01J31/28—Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen
    • H01J31/34—Image pick-up tubes having an input of visible light and electric output with electron ray scanning the image screen having regulation of screen potential at cathode potential, e.g. orthicon
    • 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
    • H01J31/26—Image pick-up tubes having an input of visible light and electric output
    • H01J31/48—Tubes with amplification of output effected by electron multiplier arrangements within the vacuum space

Landscapes

  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)

Abstract

560,904. Cathode-ray tupes. MARCONI'S WIRELESS TELEGRAPH CO., Ltd. Aug. 27, 1942, No. 12097. Convention date, Jan. 29, 1941. [Classes 39 (i) and 40 (iii)] A television transmission tube of the type in which the.whole beam path is immersed in an axial magnetic field from coil 15, comprises in order along the tube an electron gun 3, first deflecting plates. 20, 21, an electron multiplier 32 ... 35, beam lifting plates 24, 25, second deflecting coils 22, 23, and a target 2. Both the gun and the multiplier are offset from the target centre, on opposite sides. The beam from the gun, after scanning deflection perpendicular to the paper is permanently lifted by plates 24, 25 to bring it opposite the target centre. The 'returning electrons are again lifted so as to strike the first electrode 32 of the multiplier, 'the electrodes of which have a width, perpendicular to the paper, greater than the first scanning. Apertured screens 50, 51, 54 are connected to the earthed gun anode 12. Electrodes 24, 25 are quarter-cylindrical coatings on the envelope 1, and the lifting space is rendered equipotential by similar earthed coatings 60, 61, completing the cylinder. A further coating electrode 71 enables the field directly in front of the target to be adjusted to eliminate rotational distortion of the magnetic focussing field. The target 2 is a photoelectric mosaic maintained nearly at cathode potential and reflects electrons to a variable extent dependent on the image element. To maintain zero axial field in the lifting space irrespective of the position of the'beam in the first scanning deflection, a small fraction of the scanning voltage from resistance 67 is added to the constant potential applied to the plates 24, 25 by battery 65. To eliminate the effect of photo-electrons collected by the multiplier, a very high frequency may be applied to the target backing plate 6. The useful output at the electrode 35 will then be modulated at that frequency and can be filtered from the photocurrent, which is unaffected by the potential of the target. Specifications 542,219 and 543,890 are referred to.
GB12097/42A 1941-01-29 1942-08-27 Improvements in television transmitting tubes Expired GB560904A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US376453A US2288402A (en) 1941-01-29 1941-01-29 Television transmitting tube

Publications (1)

Publication Number Publication Date
GB560904A true GB560904A (en) 1944-04-26

Family

ID=23485088

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12097/42A Expired GB560904A (en) 1941-01-29 1942-08-27 Improvements in television transmitting tubes

Country Status (3)

Country Link
US (1) US2288402A (en)
DE (1) DE911737C (en)
GB (1) GB560904A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE863824C (en) * 1946-09-10 1953-01-19 Compangnie Pour La Fabrication Arrangement for operating a television image splitting tube
DE933871C (en) * 1944-06-08 1955-10-06 Cfcmug Arrangement for the operation of television dismantling

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2899488A (en) * 1959-08-11 Nesa strips
GB578273A (en) * 1943-03-03 1946-06-21 British Thomson Houston Co Ltd Improvements in electron optical systems
US2532793A (en) * 1944-12-30 1950-12-05 Rca Corp Reflex amplification utilizing camera tube
US2465667A (en) * 1945-01-09 1949-03-29 Rca Corp Method of and means for controlling the beam current in television camera tubes
US2460093A (en) * 1945-04-19 1949-01-25 Rca Corp Cathode beam transmitter tube
US2454378A (en) * 1945-05-28 1948-11-23 Rca Corp Cathode-ray tube apparatus
US2541374A (en) * 1946-06-28 1951-02-13 Rca Corp Velocity-selection-type pickup tube
US2520240A (en) * 1946-09-05 1950-08-29 Rca Corp Cathode-ray tube
US2543793A (en) * 1946-11-16 1951-03-06 Alvin M Marks Three-dimensional intercommunicating system
US2648794A (en) * 1947-02-18 1953-08-11 Emi Ltd Electron discharge device such as television transmission tube
US2747133A (en) * 1950-07-05 1956-05-22 Rca Corp Television pickup tube
NL167644B (en) * 1951-02-24 Grace W R & Co DEVICE FOR OPENING A BAG AT A PREDEFINED PLACE.
FR1057404A (en) * 1952-05-27 1954-03-08 Csf Photoconductive cell tube

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE933871C (en) * 1944-06-08 1955-10-06 Cfcmug Arrangement for the operation of television dismantling
DE863824C (en) * 1946-09-10 1953-01-19 Compangnie Pour La Fabrication Arrangement for operating a television image splitting tube

Also Published As

Publication number Publication date
US2288402A (en) 1942-06-30
DE911737C (en) 1954-05-20

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