GB490845A - Improvements in or relating to television transmitting systems - Google Patents

Improvements in or relating to television transmitting systems

Info

Publication number
GB490845A
GB490845A GB1729/37A GB172937A GB490845A GB 490845 A GB490845 A GB 490845A GB 1729/37 A GB1729/37 A GB 1729/37A GB 172937 A GB172937 A GB 172937A GB 490845 A GB490845 A GB 490845A
Authority
GB
United Kingdom
Prior art keywords
electrons
mosaic
photo
cathode
speed
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
GB1729/37A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1729/37A priority Critical patent/GB490845A/en
Priority to FR820324D priority patent/FR820324A/en
Priority to US185480A priority patent/US2258557A/en
Publication of GB490845A publication Critical patent/GB490845A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/021—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof arrangements for eliminating interferences in the tube

Abstract

490,845. Cathode-ray tubes. PERCIVAL, W. S., BROWNE, C. O., JOHNSON, L. R. J., and BLYTHEN, F. Jan. 20, 1937, No. 1729. Drawings to Specification. [Class 39 (i)] In a television transmitting tube in which a mosaic screen is scanned by a cathode ray to generate picture signals, and wherein a connecting signal is applied to reduce the effect of " tilt," the correcting signal is made more constant, despite rapid changes in the brightness of the image, by generating in the tube electrons having a speed of the order of the emission speed of photo-electrons, these electrons being additional to photo-electrons which may be emitted from the mosaic or by the scanning beam. The slow-speed electrons may be generated thermionically or by projecting light on to a photoelectric surface, such as an anode, from a filament, which is arranged behind the mosaic and is energized by D.C. or A.C. The mosaic may be light sensitive, or a separate photo-cathode may be provided, and the slowspeed electrons may be generated continuously or intermittently between successive frames.
GB1729/37A 1937-01-20 1937-01-20 Improvements in or relating to television transmitting systems Expired GB490845A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB1729/37A GB490845A (en) 1937-01-20 1937-01-20 Improvements in or relating to television transmitting systems
FR820324D FR820324A (en) 1937-01-20 1937-04-07 Improvements to transmitting systems for television
US185480A US2258557A (en) 1937-01-20 1938-01-18 Television transmitting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1729/37A GB490845A (en) 1937-01-20 1937-01-20 Improvements in or relating to television transmitting systems

Publications (1)

Publication Number Publication Date
GB490845A true GB490845A (en) 1938-08-22

Family

ID=9726972

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1729/37A Expired GB490845A (en) 1937-01-20 1937-01-20 Improvements in or relating to television transmitting systems

Country Status (3)

Country Link
US (1) US2258557A (en)
FR (1) FR820324A (en)
GB (1) GB490845A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE916175C (en) * 1950-10-28 1954-08-05 Cfcmug Image dismantling tube
DE1127394B (en) * 1952-07-05 1962-04-12 Fernseh Gmbh Image storage tubes for fast scanning electrons, the storage electrode of which is sprinkled with a stream of slow photoelectrons

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2445040A (en) * 1943-05-13 1948-07-13 Rca Corp Dark spot corrector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE916175C (en) * 1950-10-28 1954-08-05 Cfcmug Image dismantling tube
DE1127394B (en) * 1952-07-05 1962-04-12 Fernseh Gmbh Image storage tubes for fast scanning electrons, the storage electrode of which is sprinkled with a stream of slow photoelectrons

Also Published As

Publication number Publication date
US2258557A (en) 1941-10-07
FR820324A (en) 1937-11-09

Similar Documents

Publication Publication Date Title
US2294820A (en) Color television signal-translating system
GB488920A (en) Improvements in or relating to electron-optical systems
GB520106A (en) Improvements in or relating to television and like transmitting cathode ray tubes
GB490845A (en) Improvements in or relating to television transmitting systems
US2267823A (en) Scanning device for television
US2260911A (en) Television device
GB462330A (en) Improvements in or relating to television picture reproducing apparatus
GB464919A (en) Improvements in or relating to television transmitting and the like systems
GB610288A (en) Television scanning systems
GB461646A (en) Improvements in or relating to television and like transmitters
GB495707A (en) Improvements in or relating to focussing systems for use in electric discharge tubes
ES423635A1 (en) Color signal control system for color television receivers
GB498867A (en) Improvements in or relating to the generation of signals in television or like systems
GB452125A (en) Improvements in and relating to cathode ray tubes
US2228402A (en) Picture transmitter
GB426505A (en) Improvements in or relating to television transmitting and the like systems
GB490391A (en) Improvements in or relating to television and like systems
GB529410A (en) Improvements in or relating to television transmitting cathode ray tubes
US2217758A (en) Cathode ray tube system
GB722907A (en) Improvements in or relating to television pick-up tubes, and television apparatus incorporating the same
GB477406A (en) Improvements in or relating to television or like systems and electron discharge apparatus therefor
GB665737A (en) Improvements in television systems
GB520646A (en) Improvements in or relating to television transmitting tubes
GB480275A (en) Improvements in or relating to cathode ray tubes
GB438716A (en) Improvements in or relating to television, picture telegraphy and the like