GB471913A - Improvements in or relating to cathode ray tube apparatus - Google Patents

Improvements in or relating to cathode ray tube apparatus

Info

Publication number
GB471913A
GB471913A GB7522/36A GB752236A GB471913A GB 471913 A GB471913 A GB 471913A GB 7522/36 A GB7522/36 A GB 7522/36A GB 752236 A GB752236 A GB 752236A GB 471913 A GB471913 A GB 471913A
Authority
GB
United Kingdom
Prior art keywords
mosaic
rays
electrode
members
march
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
GB7522/36A
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.)
Telefunken AG
Original Assignee
Telefunken AG
Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH
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 Telefunken AG, Telefunken Gesellschaft fuer Drahtlose Telegraphie mbH filed Critical Telefunken AG
Publication of GB471913A publication Critical patent/GB471913A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/18—Time-division multiplex systems using frequency compression and subsequent expansion of the individual signals
    • 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
    • H01J31/58—Tubes for storage of image or information pattern or for conversion of definition of television or like images, i.e. having electrical input and electrical output
    • H01J31/60—Tubes for storage of image or information pattern or for conversion of definition of television or like images, i.e. having electrical input and electrical output having means for deflecting, either selectively or sequentially, an electron ray on to separate surface elements of the screen
    • H01J31/62—Tubes for storage of image or information pattern or for conversion of definition of television or like images, i.e. having electrical input and electrical output having means for deflecting, either selectively or sequentially, an electron ray on to separate surface elements of the screen with separate reading and writing rays
    • H01J31/64—Tubes for storage of image or information pattern or for conversion of definition of television or like images, i.e. having electrical input and electrical output having means for deflecting, either selectively or sequentially, an electron ray on to separate surface elements of the screen with separate reading and writing rays on opposite sides of screen, e.g. for conversion of definition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/06—Secret communication by transmitting the information or elements thereof at unnatural speeds or in jumbled order or backwards

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Measurement Of Radiation (AREA)
  • Image-Pickup Tubes, Image-Amplification Tubes, And Storage Tubes (AREA)
  • Transforming Electric Information Into Light Information (AREA)

Abstract

471,913. Secret transmission. TELEFUNKEN GES. FUR DRAHTLOSE TELEGRAPHIE. March 12, 1936, No. 7522. Convention date, March 12, 1935. [Class 40 (iv)] [Also in Group XL] A system for secret telephony comprises a cathode - ray tube R, Fig. 2, provided with a mosaic electrode S and with two electron guns each of which comprises an indirectly-heated cathode 7, modulating electrode 6 and anode 5. Anodes 4 collect the secondary electrons on the respective sides of the mosaic. The potentials for the various electrodes are obtained through resistances 9 .. 12 from a potentiometer 8, a point of which, together with the common electrode of the mosaic S, is earthed. The mosaic S, Fig. 3, comprises two elliptical or circular parts which are fitted with insulated elements emitting secondary electrons, and are joined by insulating members 22. Speech signals from a microphone 14 are amplified at 15 and applied across a resistance 13 so as to be superposed on the potential of a control electrode 6. Charges are formed by the controlled beam on the electrodes of the mosaic which is subsequently scanned by the beam 20 of constant intensity. A voltage which varies in dependence upon the original speech signals will he produced across the resistance 11 and may be amplified and transmitted. The rays may be adapted to scan the mosaic in opposite directions, preferably crossing at the insulating members 22, so that an inversion of the speech signal is obtained. Further, the rays may be adapted to pass rapidly over the members 22 so that only supersonic interruption occurs. The rays are deflected to scan the mosaic by electrostatic means or by pairs of magnetic members 18, 19 which are connected to independent generators 16, 17. The above arrangement can be used in telegraph systems.
GB7522/36A 1935-03-12 1936-03-12 Improvements in or relating to cathode ray tube apparatus Expired GB471913A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE471913X 1935-03-12

Publications (1)

Publication Number Publication Date
GB471913A true GB471913A (en) 1937-09-13

Family

ID=6541337

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7522/36A Expired GB471913A (en) 1935-03-12 1936-03-12 Improvements in or relating to cathode ray tube apparatus

Country Status (3)

Country Link
US (1) US2175573A (en)
FR (1) FR802982A (en)
GB (1) GB471913A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE971063C (en) * 1954-04-15 1958-12-04 Csf Double-sided signal plate for storage tubes with writing and reading system, which are arranged on different sides of the signal plate

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2453659A (en) * 1941-09-05 1948-11-09 Gutzwiller & Co E Secret telegraph signaling
BE483047A (en) * 1943-08-06
US2430038A (en) * 1943-10-05 1947-11-04 Bell Telephone Labor Inc Cathode-ray device for improving signal-to-noise ratio in radar systems
US2595691A (en) * 1943-10-05 1952-05-06 Bell Telephone Labor Inc Signal responsive circuit
US2524837A (en) * 1943-12-16 1950-10-10 James L Russell Device for the elimination of random signals from a recurrent wave source
US2948779A (en) * 1943-12-16 1960-08-09 James L Russell Scrambling system
US2612634A (en) * 1944-10-19 1952-09-30 Rca Corp Angular modulation
US3924075A (en) * 1947-03-20 1975-12-02 Bell Telephone Labor Inc Two-way privacy system terminal with single key pulse generator means
US2599206A (en) * 1948-12-24 1952-06-03 Rca Corp Electronic delay system
US2531600A (en) * 1949-02-04 1950-11-28 Bell Telephone Labor Inc Electron beam tube filter
US2933702A (en) * 1956-11-29 1960-04-19 Bell Telephone Labor Inc Time reversal delay distortion corrector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE971063C (en) * 1954-04-15 1958-12-04 Csf Double-sided signal plate for storage tubes with writing and reading system, which are arranged on different sides of the signal plate

Also Published As

Publication number Publication date
FR802982A (en) 1936-09-19
US2175573A (en) 1939-10-10

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