GB329379A - Improvements in or relating to automatic switches for use in telephone or like systems - Google Patents

Improvements in or relating to automatic switches for use in telephone or like systems

Info

Publication number
GB329379A
GB329379A GB543329A GB543329A GB329379A GB 329379 A GB329379 A GB 329379A GB 543329 A GB543329 A GB 543329A GB 543329 A GB543329 A GB 543329A GB 329379 A GB329379 A GB 329379A
Authority
GB
United Kingdom
Prior art keywords
wipers
wiper
systems
telephone
relating
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
GB543329A
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.)
Automatic Telephone Manufacturing Co Ltd
Original Assignee
Automatic Telephone Manufacturing 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 Automatic Telephone Manufacturing Co Ltd filed Critical Automatic Telephone Manufacturing Co Ltd
Priority to GB543329A priority Critical patent/GB329379A/en
Publication of GB329379A publication Critical patent/GB329379A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

329,379. Automatic Telephone Manufacturing Co., Ltd., and Saville,- W. Feb. 18, 1929. Automatic exchange systems. - In a selector with four sets of wipers arranged to hunt simultaneously, the shunt-field stepping relay G has each of its windings connected to two test wipers in parallel, with a resistance R1 - - R4 in series with each wiper, the relay being marginally adjusted so that it will only operate to cause the switch to take a further step if all four wipers are encountering busy-potential. If more than one idle line is simultaneously reached, priority is determined by a chain locking circuit which prevents more than one of the wiper-switching relays HA - - HD from remaining energized.. Provision is made for giving a busy signal from 11th-step springs S.
GB543329A 1929-02-18 1929-02-18 Improvements in or relating to automatic switches for use in telephone or like systems Expired GB329379A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB543329A GB329379A (en) 1929-02-18 1929-02-18 Improvements in or relating to automatic switches for use in telephone or like systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB543329A GB329379A (en) 1929-02-18 1929-02-18 Improvements in or relating to automatic switches for use in telephone or like systems

Publications (1)

Publication Number Publication Date
GB329379A true GB329379A (en) 1930-05-19

Family

ID=9796094

Family Applications (1)

Application Number Title Priority Date Filing Date
GB543329A Expired GB329379A (en) 1929-02-18 1929-02-18 Improvements in or relating to automatic switches for use in telephone or like systems

Country Status (1)

Country Link
GB (1) GB329379A (en)

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