GB123053A - Improvements in or relating to Automatic Telephone Systems. - Google Patents

Improvements in or relating to Automatic Telephone Systems.

Info

Publication number
GB123053A
GB123053A GB15434/18A GB1543418A GB123053A GB 123053 A GB123053 A GB 123053A GB 15434/18 A GB15434/18 A GB 15434/18A GB 1543418 A GB1543418 A GB 1543418A GB 123053 A GB123053 A GB 123053A
Authority
GB
United Kingdom
Prior art keywords
relay
trunk
line
circuit
over
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
GB15434/18A
Other languages
English (en)
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
Publication of GB123053A publication Critical patent/GB123053A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite

Landscapes

  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
GB15434/18A 1918-02-04 1918-09-23 Improvements in or relating to Automatic Telephone Systems. Expired GB123053A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US215235A US1435249A (en) 1918-02-04 1918-02-04 Automatic telephone system

Publications (1)

Publication Number Publication Date
GB123053A true GB123053A (en) 1919-04-03

Family

ID=22802193

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15434/18A Expired GB123053A (en) 1918-02-04 1918-09-23 Improvements in or relating to Automatic Telephone Systems.

Country Status (5)

Country Link
US (1) US1435249A (enrdf_load_stackoverflow)
DE (1) DE393560C (enrdf_load_stackoverflow)
FR (1) FR495450A (enrdf_load_stackoverflow)
GB (1) GB123053A (enrdf_load_stackoverflow)
NL (1) NL7828C (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE765694C (de) * 1933-05-13 1953-02-23 Siemens & Halske A G Schaltungsanordnung zur Kennzeichnung verschiedener Verkehrsrichtungen in Fernsprechanlagen

Also Published As

Publication number Publication date
US1435249A (en) 1922-11-14
DE393560C (enrdf_load_stackoverflow)
NL7828C (enrdf_load_stackoverflow)
FR495450A (fr) 1919-10-08

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