GB448031A - Improvements in or relating to synchronising means for television and like purposes - Google Patents

Improvements in or relating to synchronising means for television and like purposes

Info

Publication number
GB448031A
GB448031A GB2518134A GB2518134A GB448031A GB 448031 A GB448031 A GB 448031A GB 2518134 A GB2518134 A GB 2518134A GB 2518134 A GB2518134 A GB 2518134A GB 448031 A GB448031 A GB 448031A
Authority
GB
United Kingdom
Prior art keywords
impulses
signals
strip
framing
suppressing
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
GB2518134A
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.)
MICHAEL BOWMAN MANIFOLD
Original Assignee
MICHAEL BOWMAN MANIFOLD
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 MICHAEL BOWMAN MANIFOLD filed Critical MICHAEL BOWMAN MANIFOLD
Priority to GB1834835A priority Critical patent/GB448066A/en
Priority to GB2518134A priority patent/GB448031A/en
Priority to GB1834735A priority patent/GB445912A/en
Priority to GB829936A priority patent/GB448097A/en
Priority to FR794244D priority patent/FR794244A/en
Priority to DEE47308D priority patent/DE754289C/en
Priority to DEE2316D priority patent/DE916178C/en
Publication of GB448031A publication Critical patent/GB448031A/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
    • H04N5/06—Generation of synchronising signals
    • H04N5/067—Arrangements or circuits at the transmitter end
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Mechanical Optical Scanning Systems (AREA)
  • Transforming Electric Information Into Light Information (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
  • Picture Signal Circuits (AREA)
  • Television Systems (AREA)

Abstract

448,031. Television. CORK, E. C., 50A, Kenilworth Road, Ealing, London, MANIFOLD, M. BOWMAN-, Heathcot, near Worplesdon Station, Woking, Surrey, and BROWNE, C. O., 29, Monk's Drive, West Acton, London. Aug. 31, 1934, Nos. 25181/34, 29874/34, and 7205/35. [Class 40 (iii)] The framing-signals in an interlaced scanning system have leading edges at a multiple of the strip frequency which is equal to the number of partial scans in a complete scan, and some of the leading edges are in phase with the strip signals. When there are two partial scans to a complete scan, each mirror on a drum 77 sweeps the image of an illuminated aperture 64 over photo-electric cells 81, 68, 69 in succession. The cell 69 is connected to an amplifier in one sense to produce stripsynchronizing signals, and the cells 68, 81 are connected in an opposite sense to produce suppressing-impulses, which occur just before the strip impulses and mid-way between these positions. Long framing-impulses in the same sense as the strip impulses are applied across terminals 72. A valve 71 has grid-bias 73 such that the suppressing-impulses are cut off except during the framing-impulses, and grid current through a high resistance 74 cuts off the strip signals during the framing impulses, Fig. 6 (not shown). According to modifications : the synchronizing-signals are generated as described in Specification 445,912, Figs. 9-12 (not shown) ; or by an apertured disc, Figs. 15-16 (not shown); the synchronizing signals and the suppressing- impulses, which are generated as described in Specification 442,938, are mixed in a hexode and a tetrode valve in parallel, Fig. 14 (not shown). Specifications 438,905, [Group XX], 443,699, and 448,065 also are referred to.
GB2518134A 1934-08-31 1934-08-31 Improvements in or relating to synchronising means for television and like purposes Expired GB448031A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
GB1834835A GB448066A (en) 1934-08-31 1934-08-31 Improvements in or relating to synchronising means for television and like purposes
GB2518134A GB448031A (en) 1934-08-31 1934-08-31 Improvements in or relating to synchronising means for television and like purposes
GB1834735A GB445912A (en) 1934-08-31 1934-10-18 Improvements in or relating to television and like systems
GB829936A GB448097A (en) 1934-08-31 1934-10-18 Improvements in or relating to film television
FR794244D FR794244A (en) 1934-08-31 1935-08-28 Improvements to synchronization devices for television and similar applications
DEE47308D DE754289C (en) 1934-08-31 1935-08-31 Process for the production of picture change or line train change pulses lasting several line periods for television transmissions with continuous line synchronization
DEE2316D DE916178C (en) 1934-08-31 1935-08-31 Synchronization method for the transmission of an image that has been scanned interlaced with lines being added

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2518134A GB448031A (en) 1934-08-31 1934-08-31 Improvements in or relating to synchronising means for television and like purposes

Publications (1)

Publication Number Publication Date
GB448031A true GB448031A (en) 1936-06-02

Family

ID=10223544

Family Applications (4)

Application Number Title Priority Date Filing Date
GB2518134A Expired GB448031A (en) 1934-08-31 1934-08-31 Improvements in or relating to synchronising means for television and like purposes
GB1834835A Expired GB448066A (en) 1934-08-31 1934-08-31 Improvements in or relating to synchronising means for television and like purposes
GB829936A Expired GB448097A (en) 1934-08-31 1934-10-18 Improvements in or relating to film television
GB1834735A Expired GB445912A (en) 1934-08-31 1934-10-18 Improvements in or relating to television and like systems

Family Applications After (3)

Application Number Title Priority Date Filing Date
GB1834835A Expired GB448066A (en) 1934-08-31 1934-08-31 Improvements in or relating to synchronising means for television and like purposes
GB829936A Expired GB448097A (en) 1934-08-31 1934-10-18 Improvements in or relating to film television
GB1834735A Expired GB445912A (en) 1934-08-31 1934-10-18 Improvements in or relating to television and like systems

Country Status (3)

Country Link
DE (2) DE754289C (en)
FR (1) FR794244A (en)
GB (4) GB448031A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE742656C (en) * 1939-01-25 1943-12-10 Fernseh Gmbh Arrangement for filtering out pulses from a pulse mixture
DE743022C (en) * 1937-06-21 1943-12-16 Opta Radio Ag Arrangement for controlling the line train deflection generator when receiving television broadcasts according to the interlaced process
DE756078C (en) * 1935-04-24 1953-03-16 Emi Ltd Circuit arrangement for generating a pulse train with at least two groups of pulses of different frequencies
DE1030872B (en) * 1937-06-21 1958-05-29 Loewe Opta Ag Arrangement for generating alternate picture characters interrupted in the rhythm of the line pulses

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1022262B (en) * 1937-01-20 1958-01-09 Loewe Opta Ag Synchronizing arrangement for television broadcasts using the interlaced method
GB521984A (en) * 1938-11-30 1940-06-05 Gen Electric Co Ltd Improvements in apparatus for receiving television

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR742671A (en) * 1931-09-30 1933-03-13
DE707990C (en) * 1933-06-01 1941-07-09 Rca Corp Method for transmitting the line and line train pulses in the interlaced method for television purposes
FR773485A (en) * 1933-06-01 1934-11-19 Rca Corp Improvements to television systems
BE409634A (en) * 1934-05-29
CH181929A (en) * 1934-05-29 1936-01-15 Rca Corp Device for the transmission of fixed or moving images, in which a cathode ray tube is used and synchronizing pulses are transmitted together with the image currents, which are distinguished as line and image pulses.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE756078C (en) * 1935-04-24 1953-03-16 Emi Ltd Circuit arrangement for generating a pulse train with at least two groups of pulses of different frequencies
DE743022C (en) * 1937-06-21 1943-12-16 Opta Radio Ag Arrangement for controlling the line train deflection generator when receiving television broadcasts according to the interlaced process
DE1030872B (en) * 1937-06-21 1958-05-29 Loewe Opta Ag Arrangement for generating alternate picture characters interrupted in the rhythm of the line pulses
DE742656C (en) * 1939-01-25 1943-12-10 Fernseh Gmbh Arrangement for filtering out pulses from a pulse mixture

Also Published As

Publication number Publication date
GB445912A (en) 1936-04-20
FR794244A (en) 1936-02-11
DE916178C (en) 1954-08-05
GB448097A (en) 1936-06-02
GB448066A (en) 1936-06-02
DE754289C (en) 1953-02-02

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