GB535384A - Improvements in or relating to electric signalling and communication systems - Google Patents

Improvements in or relating to electric signalling and communication systems

Info

Publication number
GB535384A
GB535384A GB27369/39A GB2736939A GB535384A GB 535384 A GB535384 A GB 535384A GB 27369/39 A GB27369/39 A GB 27369/39A GB 2736939 A GB2736939 A GB 2736939A GB 535384 A GB535384 A GB 535384A
Authority
GB
United Kingdom
Prior art keywords
wave
television
decreases
time periods
relating
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
GB27369/39A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 BE442105D priority Critical patent/BE442105A/fr
Application filed by Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB27369/39A priority patent/GB535384A/en
Priority to FR870474D priority patent/FR870474A/en
Publication of GB535384A publication Critical patent/GB535384A/en
Priority to ES0175931A priority patent/ES175931A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
    • H04J3/1676—Time-division multiplex with pulse-position, pulse-interval, or pulse-width modulation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

535,384. Television. STANDARD TELEPHONES & CABLES, Ltd., BEATTY, W. A., and SCULLY, C. T. Oct. 6,1939, No. 27369. Drawings to Specification. [Class 40 (iii)] [Also in Group XXXIX] In the systems described in Specifications 523,575 and 524,671 for converting sound, television or other waves into a train of pulses defining time periods representative of signal amplitudes, the time periods instead of consisting of increases or decreases of a fixed period according to whether the amplitude is positive or negative, comprise increases (or decreases) of fixed minimum (or maximum) periods. The invention is applicable to any of the types of pulse trains described in the above mentioned Specifications and is effected by combining with the wave, before conversion into pulse form, a direct current component which varies with the amplitude level of the wave. The vision wave in television systems is used without modification if the D.C. component is present.
GB27369/39A 1939-10-06 1939-10-06 Improvements in or relating to electric signalling and communication systems Expired GB535384A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE442105D BE442105A (en) 1939-10-06
GB27369/39A GB535384A (en) 1939-10-06 1939-10-06 Improvements in or relating to electric signalling and communication systems
FR870474D FR870474A (en) 1939-10-06 1941-02-28 Electrical communication and signaling system
ES0175931A ES175931A1 (en) 1939-10-06 1946-11-29 IMPROVEMENTS IN OR RELATED TO SIGNALING AND COMMUNICATION SYSTEMS

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB27369/39A GB535384A (en) 1939-10-06 1939-10-06 Improvements in or relating to electric signalling and communication systems
GB870474X 1939-10-06

Publications (1)

Publication Number Publication Date
GB535384A true GB535384A (en) 1941-04-08

Family

ID=34839927

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27369/39A Expired GB535384A (en) 1939-10-06 1939-10-06 Improvements in or relating to electric signalling and communication systems

Country Status (2)

Country Link
FR (1) FR870474A (en)
GB (1) GB535384A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE948986C (en) * 1942-06-10 1956-09-13 Telefunken Gmbh Circuit arrangement for receiving phase-modulated pulses

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE948986C (en) * 1942-06-10 1956-09-13 Telefunken Gmbh Circuit arrangement for receiving phase-modulated pulses

Also Published As

Publication number Publication date
FR870474A (en) 1942-03-12

Similar Documents

Publication Publication Date Title
GB541665A (en) Improvements relating to high frequency wave transmission systems
ES398233A1 (en) Multi frequency receiver
GB587941A (en) Improvements relating to multi-channel electrical pulse communication systems
GB527310A (en) Improvements in or relating to television systems
GB535384A (en) Improvements in or relating to electric signalling and communication systems
GB599339A (en) Improvements in or relating to discriminator circuits for signal modulated electric pulses
FR862931A (en) Pulse sender, in particular for subscribers of an automatic telephone network
GB524671A (en) Improvements in or relating to electric signalling systems
GB997715A (en) Pulse modulation system for television signals
GB1269425A (en) Bipolar repeater
GB558343A (en) Improvements relating to pulse modulation communication systems
GB971802A (en) Signalling system for substation apparatus
ES8303864A1 (en) Circuit arrangement for deriving a field synchronizing signal from an incoming signal
GB531104A (en) Electric signal transmission systems
GB582324A (en) Improvements in or relating to time-modulated pulse communication systems
ES401910A1 (en) Remote control system
GB632901A (en) Receiving arrangements for multichannel electric pulse communication systems
GB593101A (en) Improvements in or relating to electric pulse modulating circuits
GB530956A (en) Improvements in synchronizing electric signalling systems by means of repeated impulses
GB535701A (en) Improvements in or relating to pulse modulation systems
GB463409A (en) Improvements in carrier signalling systems
GB527904A (en) Improvements in or relating to wave transmission systems for television incorporating channels utilising pulse modulation
GB959374A (en) Method of constructing a filter by displacement and reversal of the scale of frequencies
GB982224A (en) High voltage supply source
GB514643A (en) Improvements in or relating to television and like systems