GB331576A - Telephone transmission systems - Google Patents

Telephone transmission systems

Info

Publication number
GB331576A
GB331576A GB1056429A GB1056429A GB331576A GB 331576 A GB331576 A GB 331576A GB 1056429 A GB1056429 A GB 1056429A GB 1056429 A GB1056429 A GB 1056429A GB 331576 A GB331576 A GB 331576A
Authority
GB
United Kingdom
Prior art keywords
line
section
inverted
elements
currents
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
GB1056429A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB1056429A priority Critical patent/GB331576A/en
Publication of GB331576A publication Critical patent/GB331576A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/30—Time-delay networks

Landscapes

  • Digital Magnetic Recording (AREA)

Abstract

331,576. Standard Telephones & Cables, Ltd., and Sandeman, E. K. April 5, 1929. Telephone systems .-Distortion arising from the fact that the various frequency components of telephone currents are retarded in a loaded line to different extents, is corrected by dividing the message, after it has traversed half the length of the line (or section) into a number of elements which are inverted in time by means of the device, shown which comprises a rotating disc carrying magnets 31 fed in succession with the line currents and influencing a steel tape 34 travelling in the same direction as the pole tips but at half their speed, transmitting the inverted elements over the remainder of the line (or section) and then re-inverting them by means of similar apparatus. Alternatively the inversion may be done at the receiving end of the line (or - section), the inverted elements being passed through a network 8 having the same shape of time delay-frequency curve as the line but in general smaller absolute values of delay.
GB1056429A 1929-04-05 1929-04-05 Telephone transmission systems Expired GB331576A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1056429A GB331576A (en) 1929-04-05 1929-04-05 Telephone transmission systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1056429A GB331576A (en) 1929-04-05 1929-04-05 Telephone transmission systems

Publications (1)

Publication Number Publication Date
GB331576A true GB331576A (en) 1930-07-07

Family

ID=9970149

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1056429A Expired GB331576A (en) 1929-04-05 1929-04-05 Telephone transmission systems

Country Status (1)

Country Link
GB (1) GB331576A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2661397A (en) * 1948-05-08 1953-12-01 Gregory E Berens Magnetic recording
DE963618C (en) * 1954-03-02 1957-05-09 Nordwestdeutscher Rundfunk Ans Device for delay equalization in message transmission

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2661397A (en) * 1948-05-08 1953-12-01 Gregory E Berens Magnetic recording
DE963618C (en) * 1954-03-02 1957-05-09 Nordwestdeutscher Rundfunk Ans Device for delay equalization in message transmission

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