GB350371A - Improvements in and relating to the transmission of pictures - Google Patents

Improvements in and relating to the transmission of pictures

Info

Publication number
GB350371A
GB350371A GB34620/30A GB3462030A GB350371A GB 350371 A GB350371 A GB 350371A GB 34620/30 A GB34620/30 A GB 34620/30A GB 3462030 A GB3462030 A GB 3462030A GB 350371 A GB350371 A GB 350371A
Authority
GB
United Kingdom
Prior art keywords
synchronizing
picture
disc
nov
amplifier
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
GB34620/30A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB350371A publication Critical patent/GB350371A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/12—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising
    • H04N5/123—Devices in which the synchronising signals are only operative if a phase difference occurs between synchronising and synchronised scanning devices, e.g. flywheel synchronising whereby the synchronisation signal directly commands a frequency generator
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/07—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on electro-optical liquids exhibiting Kerr effect
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N3/00—Scanning details of television systems; Combination thereof with generation of supply voltages
    • H04N3/02—Scanning details of television systems; Combination thereof with generation of supply voltages by optical-mechanical means only
    • H04N3/04—Scanning details of television systems; Combination thereof with generation of supply voltages by optical-mechanical means only having a moving aperture also apertures covered by lenses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/06—Generation of synchronising signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/06—Generation of synchronising signals
    • H04N5/067—Arrangements or circuits at the transmitter end
    • H04N5/073—Arrangements or circuits at the transmitter end for mutually locking plural sources of synchronising signals, e.g. studios or relay stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/04—Synchronising
    • H04N5/08—Separation of synchronising signals from picture signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Communication System (AREA)
  • Closed-Circuit Television Systems (AREA)

Abstract

350,371. Television. BRITISH THOMSON-HOUSTON CO., Ltd., Crown House, Aldwych, London.-(Assignees of Kell, R. D. ; 111, Sanders Avenue, Scotia, New York, U.S.A.) Nov. 17, 1930, No. 34620. Convention date, Nov. 16, 1929. [Class 40 (iii).] A narrow frequency band of the picture signals is removed and replaced by a synchronizing signal. At the transmitter, Fig. 1, a rotating disc 13 scans an object 11, and reflected light falls on a photoelectric cell 15 to produce the picture currents, from which a narrow frequency band is eliminated by a filter 18. An alternator 19 on the shaft of a motor 20, which drives the scanning-disc, produces the synchronizing signal, which is combined with the remainder of the picture signal in a wireless transmitter 17. At the receiver, Fig. 2, the picture signals are applied through an amplifier 23 to modulate a light source 22. The synchronizing frequency is separated by a thermionic valve 29, back-coupled so that the resistance of a tuned circuit 34, 35 approaches zero at the synchronizing-frequency, and supplied through an amplifier 28 to drive a motor 24 coupled to a scanning-disc 26. Reference has been directed by the Comptroller to Specification 332,284, [Class 40 (iii), Telegraphs, Electric].
GB34620/30A 1929-11-16 1930-11-17 Improvements in and relating to the transmission of pictures Expired GB350371A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US407762A US1849839A (en) 1929-11-16 1929-11-16 Transmission of pictures

Publications (1)

Publication Number Publication Date
GB350371A true GB350371A (en) 1931-06-11

Family

ID=23613422

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34620/30A Expired GB350371A (en) 1929-11-16 1930-11-17 Improvements in and relating to the transmission of pictures

Country Status (3)

Country Link
US (1) US1849839A (en)
BE (2) BE371955A (en)
GB (1) GB350371A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE756470C (en) * 1933-01-28 1952-07-17 Rca Corp Circuit arrangement for storing cathode ray scanner

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE756470C (en) * 1933-01-28 1952-07-17 Rca Corp Circuit arrangement for storing cathode ray scanner

Also Published As

Publication number Publication date
US1849839A (en) 1932-03-15
BE368046A (en)
BE371955A (en)

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