US1605469A - Long-distance cable - Google Patents

Long-distance cable Download PDF

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Publication number
US1605469A
US1605469A US79458A US7945826A US1605469A US 1605469 A US1605469 A US 1605469A US 79458 A US79458 A US 79458A US 7945826 A US7945826 A US 7945826A US 1605469 A US1605469 A US 1605469A
Authority
US
United States
Prior art keywords
circuits
connections
cable
long
frequencies
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
US79458A
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English (en)
Inventor
Sattelberg Otto
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
Application filed by American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Application granted granted Critical
Publication of US1605469A publication Critical patent/US1605469A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
    • H04M11/062—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors using different frequency bands for speech and other data
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B11/00—Communication cables or conductors
    • H01B11/02—Cables with twisted pairs or quads
    • H01B11/12—Arrangements for exhibiting specific transmission characteristics
    • H01B11/16—Cables, e.g. submarine cables, with coils or other devices incorporated during cable manufacture
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
    • H04M11/06—Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors

Definitions

  • a Vspiral quad cable can accommodate approxmately more pairs of conductors
  • circuits-,fiori telephonie vfp'urp o ses While reservingf the' phantom connections torsignaling.fandy telegraphy. ItV is y thus hantom 79+ possible to accommodate in each circuit ahigh-grade telegraph dup ex con-4 nection 'or several signaling connections, or if desired bothtelegraph and signaling connections; together, without thetelephonieintercoursel in the speaking 'connections 75;, beingunfavorably influenced
  • Thel several kinds of connections are held apartuin'this y arrangement bythe range of the frequencies used in veach'case@ While directfvcurrentg.
  • cording' to this invention the mutual absence of disturbance between' the telegraph' loop'andits two component circuits is ob# tained Without balancing the cable, ⁇ by deriv'inof ⁇ the" current 4im' ulses .used for telef graph and' signaling A'purposes of the harmonics falling within the range of the-speaking frequencies.
  • filterofthis kind will further act towards barring 'the"wayjthroug h the telegraphic equipment fto :all audio-frequent imbalance currents as may arise from the unavoidable laclrof symmetry orf the cable, whereby a v ery 'materialsource of disturbances is done away'lwith.
  • 'telegrapny 13' is a filter transmittingonly frequenciesupf' to A c cles-and in Which'the current im-j" pulses o the 'telegraph Vset 14' operatedwith direct current are dep'rivedfoftlieirffhigherj harmonics.
  • ' 15 is a band 'filter having ali transmission v range betwveen and 150 cycles.
  • 16' and 17 are twojalternating cur-A rent telegraph instruments fsets'fwhi'ch are' operated on the Morse' plan, use'beingmade of electricor other selective'ineans'. for the working frequencies and 140 C. P. M.
  • the method of increasing the economy of cables which consists in arranging the conductors of the cable in spiral quad formation groupedto give two side circuits and 'range only, and side circuits for the trans mission of telephone 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)
  • Communication Cables (AREA)
US79458A 1924-02-29 1926-01-05 Long-distance cable Expired - Lifetime US1605469A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1605469X 1924-02-29

Publications (1)

Publication Number Publication Date
US1605469A true US1605469A (en) 1926-11-02

Family

ID=7737000

Family Applications (1)

Application Number Title Priority Date Filing Date
US79458A Expired - Lifetime US1605469A (en) 1924-02-29 1926-01-05 Long-distance cable

Country Status (3)

Country Link
US (1) US1605469A (enrdf_load_stackoverflow)
GB (1) GB230085A (enrdf_load_stackoverflow)
NL (1) NL18105C (enrdf_load_stackoverflow)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3581008A (en) * 1967-09-27 1971-05-25 Italiana Telecomunicazioni Sle Pulse-transmission system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3581008A (en) * 1967-09-27 1971-05-25 Italiana Telecomunicazioni Sle Pulse-transmission system

Also Published As

Publication number Publication date
NL18105C (enrdf_load_stackoverflow)
GB230085A (enrdf_load_stackoverflow) 1926-02-25

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