GB201930A - Improvements in telegraph systems - Google Patents

Improvements in telegraph systems

Info

Publication number
GB201930A
GB201930A GB19937/23A GB1993723A GB201930A GB 201930 A GB201930 A GB 201930A GB 19937/23 A GB19937/23 A GB 19937/23A GB 1993723 A GB1993723 A GB 1993723A GB 201930 A GB201930 A GB 201930A
Authority
GB
United Kingdom
Prior art keywords
permalloy
inductances
electric
telegraph systems
air
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
GB19937/23A
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.)
WESTERN ELECTRIC CO Ltd
Original Assignee
WESTERN ELECTRIC CO Ltd
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 WESTERN ELECTRIC CO Ltd filed Critical WESTERN ELECTRIC CO Ltd
Publication of GB201930A publication Critical patent/GB201930A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/40—Artificial lines; Networks simulating a line of certain length
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1407—Artificial lines or their setting

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Coils Or Transformers For Communication (AREA)
  • Magnetic Heads (AREA)

Abstract

201,930. Western Electric Co., Ltd., (Assignees of Buckley, O. E.). Aug. 3, 1922, [Convention date]. Inductances 19 in an artificial line have " permalloy " cores and variable air-gaps and inductances 19<1> are varied by varying the current in an auxiliary winding. " Permalloy " is described in Specification 184,774, [Class 40 (iii), Telegraphs, Electric] The Specification includes a discussion off the effect of an air-gap on the slope of the inductance-current curve.
GB19937/23A 1922-08-03 1923-08-03 Improvements in telegraph systems Expired GB201930A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US579356A US1551797A (en) 1922-08-03 1922-08-03 Artificial line

Publications (1)

Publication Number Publication Date
GB201930A true GB201930A (en) 1924-07-10

Family

ID=24316567

Family Applications (1)

Application Number Title Priority Date Filing Date
GB19937/23A Expired GB201930A (en) 1922-08-03 1923-08-03 Improvements in telegraph systems

Country Status (4)

Country Link
US (1) US1551797A (en)
DE (1) DE494911C (en)
FR (1) FR569300A (en)
GB (1) GB201930A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014006716A1 (en) 2014-05-05 2015-11-05 Friedrich-Schiller-Universität Jena Method for generating light coupling to optical fibers by self-organizing photopolymer

Also Published As

Publication number Publication date
DE494911C (en) 1930-03-31
FR569300A (en) 1924-04-09
US1551797A (en) 1925-09-01

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