GB190442A - Improvements in electric multiplex communication - Google Patents

Improvements in electric multiplex communication

Info

Publication number
GB190442A
GB190442A GB19183/22A GB1918322A GB190442A GB 190442 A GB190442 A GB 190442A GB 19183/22 A GB19183/22 A GB 19183/22A GB 1918322 A GB1918322 A GB 1918322A GB 190442 A GB190442 A GB 190442A
Authority
GB
United Kingdom
Prior art keywords
electromagnets
line
records
discs
reproduced
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
GB19183/22A
Other languages
English (en)
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
Publication of GB190442A publication Critical patent/GB190442A/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
    • H04B1/662—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 time/frequency relationship, e.g. time compression or expansion

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Toys (AREA)
  • Near-Field Transmission Systems (AREA)
GB19183/22A 1921-12-15 1922-07-12 Improvements in electric multiplex communication Expired GB190442A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP190442X 1921-12-15

Publications (1)

Publication Number Publication Date
GB190442A true GB190442A (en) 1923-10-12

Family

ID=11988408

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19183/22A Expired GB190442A (en) 1921-12-15 1922-07-12 Improvements in electric multiplex communication

Country Status (2)

Country Link
FR (1) FR554703A (enrdf_load_stackoverflow)
GB (1) GB190442A (enrdf_load_stackoverflow)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2434697A (en) * 1943-09-28 1948-01-20 Charles H Homrighous Time division multiplex telephone system
DE940049C (de) * 1950-02-20 1956-03-08 Normalzeit G M B H Einrichtung zur absatzweise aufeinanderfolgenden UEbertragung mehrerer gleichzeitiger Nachrichten ueber einen gemeinsamen Kanal unter Verbreiterung des Frequenzbandes
DE970915C (de) * 1953-11-15 1958-11-13 Telefonbau & Normalzeit Gmbh Anordnung zur UEbermittlung von Nachrichten unter Verringerung der Frequenzbandbreite
DE1043403B (de) * 1955-07-23 1958-11-13 Boelkow Entwicklungen Kg Einrichtung zur Verhinderung des Abhoerens von Nachrichtenuebertragungen durch Unbefugte

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2434697A (en) * 1943-09-28 1948-01-20 Charles H Homrighous Time division multiplex telephone system
DE940049C (de) * 1950-02-20 1956-03-08 Normalzeit G M B H Einrichtung zur absatzweise aufeinanderfolgenden UEbertragung mehrerer gleichzeitiger Nachrichten ueber einen gemeinsamen Kanal unter Verbreiterung des Frequenzbandes
DE970915C (de) * 1953-11-15 1958-11-13 Telefonbau & Normalzeit Gmbh Anordnung zur UEbermittlung von Nachrichten unter Verringerung der Frequenzbandbreite
DE1043403B (de) * 1955-07-23 1958-11-13 Boelkow Entwicklungen Kg Einrichtung zur Verhinderung des Abhoerens von Nachrichtenuebertragungen durch Unbefugte

Also Published As

Publication number Publication date
FR554703A (enrdf_load_stackoverflow) 1923-06-15

Similar Documents

Publication Publication Date Title
US2105016A (en) Telephone transmission system
GB775832A (en) Improvements in or relating to picture communication systems
US2539556A (en) Variable delay speech privacy system
US1671143A (en) Wave translator
GB190442A (en) Improvements in electric multiplex communication
US2312897A (en) Method of transmitting signals
US1941618A (en) Multiple system
US1624596A (en) Signaling method and system
US2038647A (en) Signaling system
US1813908A (en) High speed radiotelegraphic receiving apparatus
US3012100A (en) Telephone privacy system
US1677296A (en) Process for wireless telegraphy and telephony
US2472705A (en) Time division carrier multiplex telephone system
GB202622A (en) Improvements in electric multiplex communication
US2883458A (en) Private communication
US822222A (en) Apparatus for effecting the storing up of speech or signals.
US2434697A (en) Time division multiplex telephone system
US1166852A (en) Phonograph system for revolving auditoriums.
CN111243610A (zh) 一种数字对讲系统实现不同声码器手台互通的方法
GB385535A (en) Improvements in and relating to electric signalling systems
US1647765A (en) Transmission of pictures by electricity
US1676321A (en) Secrecy signaling system
US2246505A (en) Control system
US1219561A (en) Quadruplex telegraphy.
US1216887A (en) Inductive wireless-telephone system for railroads and the like.