US1586633A - Drainage method for four-wire-cable systems - Google Patents

Drainage method for four-wire-cable systems Download PDF

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Publication number
US1586633A
US1586633A US61101A US6110125A US1586633A US 1586633 A US1586633 A US 1586633A US 61101 A US61101 A US 61101A US 6110125 A US6110125 A US 6110125A US 1586633 A US1586633 A US 1586633A
Authority
US
United States
Prior art keywords
circuits
circuit
wire
quads
drainage
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 - Lifetime
Application number
US61101A
Other languages
English (en)
Inventor
Ralph G Mccurdy
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.)
AT&T Corp
Original Assignee
American Telephone and Telegraph Co Inc
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 BE336761D priority Critical patent/BE336761A/xx
Application filed by American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Priority to US61101A priority patent/US1586633A/en
Application granted granted Critical
Publication of US1586633A publication Critical patent/US1586633A/en
Priority to FR619976D priority patent/FR619976A/fr
Priority to GB20406/26A priority patent/GB259546A/en
Priority to DEST41637D priority patent/DE484766C/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/30—Reducing interference caused by unbalanced currents in a normally balanced line

Definitions

  • EALPE e. noounmr, or ENGLEWOOD, NEW JERSEY, assrGNon To AMERICAN TELE-r2 rnoNE Nn TEEEGEAPH COMPANY, .a coEPonA'rIoN or NEW YoEx.
  • This invention relates to transmission systems and more particularly to improvements 1n four-wire circuits 1n such ls stems 1n which .the conductors are united togetherV 5 in cables between stations.
  • Thepurpose of this invention is to provlde arrangements particularly adaptable for cir- 30 cuits of the well known four-wire type for materially decreasing the noise introduced on such circuits b conditions of unbalance.
  • This reduction 1n noise is accomplished by novel methods of drainage vwhereby the drainage is applied -to the circuits at points therein where the volume or power level is tomparatively high, such as at the output of the four-wire repeaters.
  • Other objects and features of the invention will appear more fully from the detailed description thereof hereinafter 'ven.
  • Fig. 1 shows schematically a cable circuit between repeater stations.
  • Figs. 2 and 3 show the arrangements of the quads in the cable at different points on the circuit.
  • Fig. 4 is a diagram illustrating the volume or power level at dierent points on the circuits and
  • Fig. 5 is a detailed circuit diagram of the circuit and drainage arrangements of the four-wire sys-l tem of the invention.
  • Fig. 1 a cable C interconnectin the repeater stations E and W.
  • the ca le would be composed of ductors of which would make up the oneway circuits of a four-wire system.
  • circuits 10 and 11 would be oneway circuits transmitting from repeater E to repeater W.
  • a phantom circuit 13 would also be composed by these two circuits.
  • Circuits 8 and 9 would be one-way circuits transmitting from repeater W to re,- peater E
  • a phantom circuit 12 would also be composed by these two circuits.
  • the repeating coils, or transformers, whereby these circuits are connected to the4 inputs and outputs of the repeaters would be 4lo-y cated at approximately the points indicated in Fig. 1 by the dotted lines A, A and B, B, or in other words close tothe repeaters.
  • the one-way circuits of fourwire system have the characteristic that the v volume or power level will fall 0H materially from a point close to the repeater output to another point near the successive repeater input.
  • the volume or power drop on the circuits 10, 11 and 13 between points such as A, A, and B, B would e shown in Fig. 4 by the line E-VV.
  • the beneficial effect of the drainage arrangements o this invention is most marked when the uads of the cable are arranged as shown inqFigs. 2, 3 and 5.
  • the quads of the cablel are 'iti grouped for four-wire transmission by utilizing conductors in the outside layers for transmission in one direction and conductors in the inner layers for transmission in the o posite direction. At a point, such as 3 of dtig.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
US61101A 1925-10-07 1925-10-07 Drainage method for four-wire-cable systems Expired - Lifetime US1586633A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE336761D BE336761A (enrdf_load_stackoverflow) 1925-10-07
US61101A US1586633A (en) 1925-10-07 1925-10-07 Drainage method for four-wire-cable systems
FR619976D FR619976A (fr) 1925-10-07 1926-08-06 Perfectionnements apportés aux méthodes utilisées pour la réduction du bruit dans les circuits téléphoniques
GB20406/26A GB259546A (en) 1925-10-07 1926-08-18 Improvements in methods of reducing noise in telephone circuits
DEST41637D DE484766C (de) 1925-10-07 1926-10-06 Schutzschaltung fuer Vierdrahtuebertragungssysteme mit Verstaerkern gegen aeussere induktive Beeinflussungen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US61101A US1586633A (en) 1925-10-07 1925-10-07 Drainage method for four-wire-cable systems

Publications (1)

Publication Number Publication Date
US1586633A true US1586633A (en) 1926-06-01

Family

ID=22033591

Family Applications (1)

Application Number Title Priority Date Filing Date
US61101A Expired - Lifetime US1586633A (en) 1925-10-07 1925-10-07 Drainage method for four-wire-cable systems

Country Status (5)

Country Link
US (1) US1586633A (enrdf_load_stackoverflow)
BE (1) BE336761A (enrdf_load_stackoverflow)
DE (1) DE484766C (enrdf_load_stackoverflow)
FR (1) FR619976A (enrdf_load_stackoverflow)
GB (1) GB259546A (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107569229A (zh) * 2017-09-04 2018-01-12 歌尔科技有限公司 一种生物阻抗测量方法、装置及电子设备

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107569229A (zh) * 2017-09-04 2018-01-12 歌尔科技有限公司 一种生物阻抗测量方法、装置及电子设备

Also Published As

Publication number Publication date
BE336761A (enrdf_load_stackoverflow)
GB259546A (en) 1927-05-12
FR619976A (fr) 1927-04-13
DE484766C (de) 1929-10-22

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