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GB419452A - Improvements in or relating to television - Google Patents

Improvements in or relating to television

Info

Publication number
GB419452A
GB419452A GB13197/33A GB1319733A GB419452A GB 419452 A GB419452 A GB 419452A GB 13197/33 A GB13197/33 A GB 13197/33A GB 1319733 A GB1319733 A GB 1319733A GB 419452 A GB419452 A GB 419452A
Authority
GB
United Kingdom
Prior art keywords
mosaic
photo
ray
electric
collected
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
GB13197/33A
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.)
EMI Ltd
Electrical and Musical Industries Ltd
Original Assignee
EMI Ltd
Electrical and Musical Industries 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 EMI Ltd, Electrical and Musical Industries Ltd filed Critical EMI Ltd
Priority to GB13197/33A priority Critical patent/GB419452A/en
Priority to US723633A priority patent/US2100259A/en
Priority to FR772911D priority patent/FR772911A/en
Publication of GB419452A publication Critical patent/GB419452A/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
    • H01J31/30—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 anode potential, e.g. iconoscope

Landscapes

  • Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)

Abstract

419,452. Television transmitters. ELECTRIC & MUSICAL INDUSTRIES, Ltd., Blyth Road, Hayes, Middlesex, and McGEE, J. D., 9, King's Avenue, Ealing, London. May 5, 1933, No. 13197. [Classes 39 (i) and 40 (iii).] The insulated elements of a mosaic screen 11 have on one side a coating of photo-electric material on which the picture is projected, and the opposite side is scanned by a cathode ray 21. The mosaic consists of short aluminium wires with a thin insulating coating of aluminium oxide covered by a conducting film of silver, Fig. 2 (not shown). The photo-electric emission from the screen is collected by an earthed grid 10. Each element of the mosaic thus receives a charge dependent on the strength of the incident light. When the cathode-ray is incident on an element, the latter reaches the negative potential at which its retarding effect on the ray so reduces its speed that the number of secondary electrons 22 equals the number of primary electrons, Fig. 3 (not shown). The number of secondary electrons emitted thus varies with the charge given photo-electrically to each element of the mosaic. The secondary emission is collected by a ring electrode 12, and the voltage across a resistance 18, connected between the electrode and earth, is applied to a valve 19.
GB13197/33A 1933-05-05 1933-05-05 Improvements in or relating to television Expired GB419452A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB13197/33A GB419452A (en) 1933-05-05 1933-05-05 Improvements in or relating to television
US723633A US2100259A (en) 1933-05-05 1934-05-03 Television
FR772911D FR772911A (en) 1933-05-05 1934-05-05 Improvements to television devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB13197/33A GB419452A (en) 1933-05-05 1933-05-05 Improvements in or relating to television

Publications (1)

Publication Number Publication Date
GB419452A true GB419452A (en) 1934-11-05

Family

ID=10018598

Family Applications (1)

Application Number Title Priority Date Filing Date
GB13197/33A Expired GB419452A (en) 1933-05-05 1933-05-05 Improvements in or relating to television

Country Status (3)

Country Link
US (1) US2100259A (en)
FR (1) FR772911A (en)
GB (1) GB419452A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739261C (en) * 1937-05-15 1943-09-16 Rca Corp Operating method for a cathode ray transmitter tube with a mosaic screen and a fused-on secondary electron multiplier
DE763126C (en) * 1935-07-26 1952-05-23 Rca Corp Retaining image catcher with one-sided mosaic electrode
DE889604C (en) * 1936-12-12 1953-09-10 Alfred Dr-Ing Bigalke Image catcher tube with cathode ray scanning and built-in secondary electron multiplier
DE753637C (en) * 1938-03-29 1954-03-08 Fernseh Gmbh Method for operating image storage tubes, preferably with a storage electrode on one side
DE918757C (en) * 1937-06-26 1954-10-04 Fernseh Gmbh Saving image catcher tubes

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE754133C (en) * 1935-08-14 1958-04-24 Fernseh Gmbh Mosaic electrode for storing image decomposition tubes
GB469033A (en) * 1936-01-16 1937-07-16 Hans Gerhard Lubszynski Improvements in and relating to television and like systems
GB499828A (en) * 1937-07-28 1939-01-30 Baird Television Ltd Improvements in or relating to electron discharge devices for use in television and like systems
DE741899C (en) * 1940-05-29 1943-11-18 Fernseh Gmbh Image transmitter tubes with a grid-shaped storage electrode acting as a control grid
US2442287A (en) * 1943-08-13 1948-05-25 Pye Ltd Means for reproducing X-ray images

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE763126C (en) * 1935-07-26 1952-05-23 Rca Corp Retaining image catcher with one-sided mosaic electrode
DE889604C (en) * 1936-12-12 1953-09-10 Alfred Dr-Ing Bigalke Image catcher tube with cathode ray scanning and built-in secondary electron multiplier
DE739261C (en) * 1937-05-15 1943-09-16 Rca Corp Operating method for a cathode ray transmitter tube with a mosaic screen and a fused-on secondary electron multiplier
DE918757C (en) * 1937-06-26 1954-10-04 Fernseh Gmbh Saving image catcher tubes
DE753637C (en) * 1938-03-29 1954-03-08 Fernseh Gmbh Method for operating image storage tubes, preferably with a storage electrode on one side

Also Published As

Publication number Publication date
FR772911A (en) 1934-11-08
US2100259A (en) 1937-11-23

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