GB455375A - Improvements in and relating to television and like systems - Google Patents

Improvements in and relating to television and like systems

Info

Publication number
GB455375A
GB455375A GB1408/35A GB140835A GB455375A GB 455375 A GB455375 A GB 455375A GB 1408/35 A GB1408/35 A GB 1408/35A GB 140835 A GB140835 A GB 140835A GB 455375 A GB455375 A GB 455375A
Authority
GB
United Kingdom
Prior art keywords
impulses
valve
synchronizing
impulse
charge
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
GB1408/35A
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.)
HARLES LESLIE FAUDELL
MICHAEL BOWMAN ANIFOLD
Original Assignee
HARLES LESLIE FAUDELL
MICHAEL BOWMAN ANIFOLD
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
Priority to GB1408/35A priority Critical patent/GB455375A/en
Application filed by HARLES LESLIE FAUDELL, MICHAEL BOWMAN ANIFOLD filed Critical HARLES LESLIE FAUDELL
Priority to DEE47829A priority patent/DE754557C/en
Priority to US59022A priority patent/US2227066A/en
Priority to FR800602D priority patent/FR800602A/en
Priority to BE413315D priority patent/BE413315A/xx
Publication of GB455375A publication Critical patent/GB455375A/en
Priority to GB1728/37A priority patent/GB489231A/en
Priority to GB6409/37A priority patent/GB490150A/en
Priority to FR832232D priority patent/FR832232A/en
Priority to US185493A priority patent/US2212933A/en
Priority to DEE2371A priority patent/DE893806C/en
Priority to FR49228D priority patent/FR49228E/en
Priority to US193257A priority patent/US2210523A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/02—Measuring characteristics of individual pulses, e.g. deviation from pulse flatness, rise time or duration
    • G01R29/027—Indicating that a pulse characteristic is either above or below a predetermined value or within or beyond a predetermined range of values
    • G01R29/0273—Indicating that a pulse characteristic is either above or below a predetermined value or within or beyond a predetermined range of values the pulse characteristic being duration, i.e. width (indicating that frequency of pulses is above or below a certain limit)
    • 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
    • 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
    • H04N5/10—Separation of line synchronising signal from frame synchronising signal or vice versa

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Details Of Television Scanning (AREA)
  • Video Image Reproduction Devices For Color Tv Systems (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Dc-Dc Converters (AREA)

Abstract

455,375. Television. CORK, E. C., 50A, Kenilworth Road, Ealing, London, MANIFOLD, M. BOWMAN-, Heathcot, Worplesdon Station, Surrey, and FAUDELL, C. L., 5, The Ridgeway, Acton, London. Jan. 15, 1935, Nos. 1408 and 23109. [Classes 40 (iii) and 40 (v)] In order to prevent the short strip-synchronizing impulses from influencing the framing scanning oscillator, the long framing impulses are separated from the short strip-synchronizing impulses by causing the impulses to control the charging of a condenser or inductance, the amplitude of the derived pulse increasing during the impulse to a value depending on its duration. The charge on the condenser or inductance due to the short strip-synchronizing impulses falls to a fixed minimum during the interval between successive impulses ; building-up of a charge which might simulate the effect of a framing impulse is thus avoided. The charge on an impedance 13 is changed in one sense during an impulse at a rate determined by a circuit 11, 12, 13, which has a much larger time constant than that 10, 12, 13 which determines the rate of change of the charge in the opposite sense after the impulse. Synchronizing - signals are separated from picture signals by a valve 5 biassed beyond the bottom bend of its characteristic. The separated synchronizing signals cut off the anode current of the valve 10 and, during this time, the condenser 13 is charged comparatively slowly through the resistance 11. At the end of the impulse, the condenser discharges rapidly through the valve 10, which becomes conducting. The charge on the condenser becomes sufficient, in the case of the long framing impulses, to overcome the bias 15 on a valve 14. According to modifications, all the signals are applied to the valve 10 and the picture signals are removed by a grid-current effect and the derived pulses are applied to a discharge tube so biassed that the framing impulses produce saw-toothed oscillations, Fig. 3 (not shown) ; the derived pulses are obtained by causing the impulses to initiate charging- current in an inductance, Fig. 4 (not shown) ; a biassed diode separates the derived pulses of greater amplitude, Fig. 5 (not shown) ; the valve for separating the synchronizing signals and obtaining the derived pulses is a pentode.
GB1408/35A 1935-01-15 1935-01-15 Improvements in and relating to television and like systems Expired GB455375A (en)

Priority Applications (12)

Application Number Priority Date Filing Date Title
GB1408/35A GB455375A (en) 1935-01-15 1935-01-15 Improvements in and relating to television and like systems
DEE47829A DE754557C (en) 1935-01-15 1936-01-12 Circuit arrangement for the separation of pulses of different duration by converting them into pulses of different amplitudes
US59022A US2227066A (en) 1935-01-15 1936-01-14 Television and like systems
FR800602D FR800602A (en) 1935-01-15 1936-01-15 Improvements for television and analog systems
BE413315D BE413315A (en) 1935-01-15 1936-01-15
GB1728/37A GB489231A (en) 1935-01-15 1937-01-20 Improvements in or relating to television systems
GB6409/37A GB490150A (en) 1935-01-15 1937-03-04 Improvements in or relating to television systems
FR832232D FR832232A (en) 1935-01-15 1938-01-18 Improvements to television systems
US185493A US2212933A (en) 1935-01-15 1938-01-18 Television system
DEE2371A DE893806C (en) 1935-01-15 1938-01-20 Circuit arrangement for the separation of square-shaped pulses of the same amplitude but of different duration by converting them into triangular-shaped pulses of different amplitude
FR49228D FR49228E (en) 1935-01-15 1938-02-25 Improvements for television and analog systems
US193257A US2210523A (en) 1935-01-15 1938-03-01 Television system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1408/35A GB455375A (en) 1935-01-15 1935-01-15 Improvements in and relating to television and like systems

Publications (1)

Publication Number Publication Date
GB455375A true GB455375A (en) 1936-10-15

Family

ID=32096607

Family Applications (3)

Application Number Title Priority Date Filing Date
GB1408/35A Expired GB455375A (en) 1935-01-15 1935-01-15 Improvements in and relating to television and like systems
GB1728/37A Expired GB489231A (en) 1935-01-15 1937-01-20 Improvements in or relating to television systems
GB6409/37A Expired GB490150A (en) 1935-01-15 1937-03-04 Improvements in or relating to television systems

Family Applications After (2)

Application Number Title Priority Date Filing Date
GB1728/37A Expired GB489231A (en) 1935-01-15 1937-01-20 Improvements in or relating to television systems
GB6409/37A Expired GB490150A (en) 1935-01-15 1937-03-04 Improvements in or relating to television systems

Country Status (5)

Country Link
US (3) US2227066A (en)
BE (1) BE413315A (en)
DE (2) DE754557C (en)
FR (3) FR800602A (en)
GB (3) GB455375A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE959375C (en) * 1937-07-22 1957-03-07 Telefunken Gmbh Circuit arrangement for synchronizing a process by means of pulses, in particular for television purposes

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2734945A (en) * 1956-02-14 Wave generating systems
DE763150C (en) * 1937-07-22 1953-01-05 Telefunken Gmbh Circuit arrangement for separating the image change pulses from a pulse mixture which also contains the line pulses
BE464095A (en) * 1944-03-25
US2506124A (en) * 1944-03-28 1950-05-02 Emi Ltd Circuit arrangement for indicating the duration of electrical pulses
US2603747A (en) * 1944-04-24 1952-07-15 Sperry Corp Sweep circuit
US2429844A (en) * 1945-01-13 1947-10-28 Max I Rothman Pulse delay circuits
US2431577A (en) * 1945-03-14 1947-11-25 Philco Corp Synchronizing system
NL76844C (en) * 1945-07-14
GB621494A (en) * 1946-01-08 1949-04-11 Dennis Illingworth Lawson Improvements in or relating to television receivers
US2567977A (en) * 1946-08-24 1951-09-18 Bendix Aviat Corp Electric trip circuit
US2628313A (en) * 1948-10-01 1953-02-10 Motorola Inc Synchronization system
US2616964A (en) * 1949-05-19 1952-11-04 Philco Corp Synchronizing separator for television receivers
US2585929A (en) * 1949-06-10 1952-02-19 Gen Electric Synchronizing system for resonant circuit oscillators
US2606939A (en) * 1949-06-25 1952-08-12 Standard Oil Co Conversion of olefins, carbon monoxide, and hydrogen
NL74981C (en) * 1949-12-21
US2739182A (en) * 1950-02-02 1956-03-20 Avco Mfg Corp Single-tube control circuit for horizontal and vertical deflecting systems of a television receiver
BE517706A (en) * 1951-09-20
US2776370A (en) * 1952-06-27 1957-01-01 Harold N Beveridge Pulse width discriminator
US2834918A (en) * 1953-09-04 1958-05-13 Westinghouse Electric Corp Electric discharge apparatus
US2820845A (en) * 1954-09-01 1958-01-21 Rca Corp Frequency controlled oscillators
US2952738A (en) * 1956-01-09 1960-09-13 Glen L Akins Television viewfinder marker signal generators
US2883535A (en) * 1956-03-15 1959-04-21 Creveling Robert Thyratron switch

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR742671A (en) * 1931-09-30 1933-03-13
AT144309B (en) * 1934-04-28 1936-01-10 Rca Corp Switching arrangement for synchronizing a television receiver.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE959375C (en) * 1937-07-22 1957-03-07 Telefunken Gmbh Circuit arrangement for synchronizing a process by means of pulses, in particular for television purposes

Also Published As

Publication number Publication date
US2210523A (en) 1940-08-06
BE413315A (en) 1936-02-29
GB490150A (en) 1938-08-10
FR800602A (en) 1936-07-15
DE893806C (en) 1953-10-19
DE754557C (en) 1952-12-01
US2227066A (en) 1940-12-31
FR832232A (en) 1938-09-23
FR49228E (en) 1938-12-07
US2212933A (en) 1940-08-27
GB489231A (en) 1938-07-20

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