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FR689304A - Improvements to electrical signaling systems - Google Patents

Improvements to electrical signaling systems

Info

Publication number
FR689304A
FR689304A FR689304DA FR689304A FR 689304 A FR689304 A FR 689304A FR 689304D A FR689304D A FR 689304DA FR 689304 A FR689304 A FR 689304A
Authority
FR
France
Prior art keywords
signaling systems
electrical signaling
electrical
systems
signaling
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
Other languages
French (fr)
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR689304A publication Critical patent/FR689304A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
    • H04B1/667—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission using a division in frequency subbands

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Transmitters (AREA)
FR689304D 1929-01-09 1930-01-08 Improvements to electrical signaling systems Expired FR689304A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB775/29A GB327709A (en) 1929-01-09 1929-01-09 Electric signalling system

Publications (1)

Publication Number Publication Date
FR689304A true FR689304A (en) 1930-09-04

Family

ID=9710303

Family Applications (1)

Application Number Title Priority Date Filing Date
FR689304D Expired FR689304A (en) 1929-01-09 1930-01-08 Improvements to electrical signaling systems

Country Status (3)

Country Link
US (1) US1911850A (en)
FR (1) FR689304A (en)
GB (1) GB327709A (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2496026A (en) * 1944-04-22 1950-01-31 Jr George H Taylor Frequency multiplier system
US2627549A (en) * 1950-08-18 1953-02-03 Rca Corp Band width reducing system and method
US2752484A (en) * 1952-10-08 1956-06-26 Karl F Ross High-frequency signaling system
DE953984C (en) * 1953-10-21 1956-12-13 Telefonbau & Normalzeit Gmbh Method for converting the frequency mixture of spoken messages into a frequency band of narrow width
DE1090726B (en) * 1953-10-26 1960-10-13 Iwatsu Electric Co Ltd Multi-channel telephone system for intermittent transmission of several simultaneous messages over the same line
DE970915C (en) * 1953-11-15 1958-11-13 Telefonbau & Normalzeit Gmbh Arrangement for the transmission of messages while reducing the frequency bandwidth
US3246084A (en) * 1960-08-26 1966-04-12 Bolt Beranek & Newman Method of and apparatus for speech compression and the like
CH589390A5 (en) * 1975-08-19 1977-06-30 Patelhold Patentverwertung

Also Published As

Publication number Publication date
US1911850A (en) 1933-05-30
GB327709A (en) 1930-04-09

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