GB455858A - Improvements in and relating to the transmission of impulses of different kinds over a common channel, for example in television and like systems - Google Patents

Improvements in and relating to the transmission of impulses of different kinds over a common channel, for example in television and like systems

Info

Publication number
GB455858A
GB455858A GB12370/35A GB1237035A GB455858A GB 455858 A GB455858 A GB 455858A GB 12370/35 A GB12370/35 A GB 12370/35A GB 1237035 A GB1237035 A GB 1237035A GB 455858 A GB455858 A GB 455858A
Authority
GB
United Kingdom
Prior art keywords
impulses
heptode
multivibrator
frequency
framing
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
GB12370/35A
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 GB12370/35A priority Critical patent/GB455858A/en
Priority to US76108A priority patent/US2212558A/en
Publication of GB455858A publication Critical patent/GB455858A/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
    • H04N5/0675—Arrangements or circuits at the transmitter end for mixing the synchronising signals with the picture signal or mutually

Abstract

455,858. Television. BLUMLEIN, A. D., 32, Audley Road, Ealing, London. April 24, 1935, No. 12370. [Class 40 (iii)] Spaced electric impulses of different kinds are transmitted from either of two separate sources 6, 7 to a common output circuit 16 by a selective switch 9, 12, which is automatically prevented from changing over except during the spacing periods between the impulses from one 7 of the sources. Line-synchronizing impulses from a multivibrator 6, are applied to the fourth grid of a heptode 9, and longer impulses at twice the line frequency are applied from a multivibrator 7 to a heptode 12. Longer switching impulses at the frame frequency from a multivibrator 8 are applied to the first grids of the heptodes to prevent the normally operative heptode 9 feeding the line impulses, while the heptode 12 feeds a train of broader framing impulses, as described in Specification 448,097. The multivibrator 8 is controlled through a heptode 19, to the first grid of which impulses at the framing frequency are supplied from a frequency divider 5. The broader impulses at twice the line frequency are also supplied to the fourth grid of this valve. This ensures the framing-frequency impulses are not applied to trigger the multivibrator 8 except in an interval of the impulses from 7, and prevents mutilation of the framing signal. Specification 425,220 also is referred to.
GB12370/35A 1935-04-24 1935-04-24 Improvements in and relating to the transmission of impulses of different kinds over a common channel, for example in television and like systems Expired GB455858A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB12370/35A GB455858A (en) 1935-04-24 1935-04-24 Improvements in and relating to the transmission of impulses of different kinds over a common channel, for example in television and like systems
US76108A US2212558A (en) 1935-04-24 1936-04-24 Signaling system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB12370/35A GB455858A (en) 1935-04-24 1935-04-24 Improvements in and relating to the transmission of impulses of different kinds over a common channel, for example in television and like systems

Publications (1)

Publication Number Publication Date
GB455858A true GB455858A (en) 1936-10-26

Family

ID=10003285

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12370/35A Expired GB455858A (en) 1935-04-24 1935-04-24 Improvements in and relating to the transmission of impulses of different kinds over a common channel, for example in television and like systems

Country Status (2)

Country Link
US (1) US2212558A (en)
GB (1) GB455858A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US2490561A (en) * 1946-06-20 1949-12-06 Jr William Ussler Television picture mixing circuit
US2755335A (en) * 1948-09-11 1956-07-17 Emi Ltd Apparatus for interspersing pulses in electrical signals
DE1022262B (en) * 1937-01-20 1958-01-09 Loewe Opta Ag Synchronizing arrangement for television broadcasts using the interlaced method
DE1032314B (en) * 1938-06-03 1958-06-19 Loewe Opta Ag Separation device for filtering out the line change and line change synchronizing pulses in television receivers

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455265A (en) * 1943-04-09 1948-11-30 Gen Electric Pulse radar system
US2478920A (en) * 1943-08-04 1949-08-16 Rca Corp Pulse system
US2605408A (en) * 1946-01-15 1952-07-29 Millman Jacob Coordination circuit
US2613318A (en) * 1946-03-26 1952-10-07 Ellery P Snyder Counting down circuit
US2519763A (en) * 1946-04-30 1950-08-22 Ralph H Hoglund Electronic gating circuit
US2531201A (en) * 1946-06-28 1950-11-21 Bell Telephone Labor Inc Electronic control circuits for radar systems
US2534844A (en) * 1947-11-26 1950-12-19 Panoramic Radio Corp Gated triple synchrometric system
US2841708A (en) * 1955-03-03 1958-07-01 Ibm Electronic logical circuits

Cited By (6)

* 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
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
DE1032314B (en) * 1938-06-03 1958-06-19 Loewe Opta Ag Separation device for filtering out the line change and line change synchronizing pulses in television receivers
US2490561A (en) * 1946-06-20 1949-12-06 Jr William Ussler Television picture mixing circuit
US2755335A (en) * 1948-09-11 1956-07-17 Emi Ltd Apparatus for interspersing pulses in electrical signals
DE976853C (en) * 1948-09-11 1964-06-11 Emi Ltd Device for keying in synchronization pulses into television picture signals

Also Published As

Publication number Publication date
US2212558A (en) 1940-08-27

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