GB191216906A - Improvements in Telephone Exchange Systems. - Google Patents

Improvements in Telephone Exchange Systems.

Info

Publication number
GB191216906A
GB191216906A GB191216906DA GB191216906A GB 191216906 A GB191216906 A GB 191216906A GB 191216906D A GB191216906D A GB 191216906DA GB 191216906 A GB191216906 A GB 191216906A
Authority
GB
United Kingdom
Prior art keywords
circuit
key
switch
telephone exchange
exchange systems
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
Inventor
William Aitken
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of GB191216906A publication Critical patent/GB191216906A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)

Abstract

16,906. Aitken, W. July 20. Automatic circuitbreakers. - An automatic circuit - breaker K is associated with the speaking - key Q of a telephone cord-circuit in such a way that, when the key Q is moved to the left, an extension 15 moves the switch K to close the contacts 6, 7, the circuit thus closed including a magnet D, the curved polepieces 53 of which attract the iron roller K' and retain the switch K in its operated position when the key Q is moved back again. When the circuit of the magnet D is broken, the switch K is released.
GB191216906D 1912-07-20 1912-07-20 Improvements in Telephone Exchange Systems. Expired GB191216906A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191216906T 1912-07-20

Publications (1)

Publication Number Publication Date
GB191216906A true GB191216906A (en) 1913-07-21

Family

ID=32642098

Family Applications (1)

Application Number Title Priority Date Filing Date
GB191216906D Expired GB191216906A (en) 1912-07-20 1912-07-20 Improvements in Telephone Exchange Systems.

Country Status (2)

Country Link
FR (1) FR468923A (en)
GB (1) GB191216906A (en)

Also Published As

Publication number Publication date
FR468923A (en) 1914-07-20

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