GB771794A - A telephone system - Google Patents

A telephone system

Info

Publication number
GB771794A
GB771794A GB29722/55A GB2972255A GB771794A GB 771794 A GB771794 A GB 771794A GB 29722/55 A GB29722/55 A GB 29722/55A GB 2972255 A GB2972255 A GB 2972255A GB 771794 A GB771794 A GB 771794A
Authority
GB
United Kingdom
Prior art keywords
test
switch
battery
wiper
telephone system
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
GB29722/55A
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 Electric Laboratories Inc
Original Assignee
Automatic Electric Laboratories 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 Automatic Electric Laboratories Inc filed Critical Automatic Electric Laboratories Inc
Publication of GB771794A publication Critical patent/GB771794A/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)
  • Secondary Cells (AREA)
  • Relay Circuits (AREA)
GB29722/55A 1953-05-01 1954-04-21 A telephone system Expired GB771794A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US352370A US2748196A (en) 1953-05-01 1953-05-01 Telephone system

Publications (1)

Publication Number Publication Date
GB771794A true GB771794A (en) 1957-04-03

Family

ID=23384856

Family Applications (2)

Application Number Title Priority Date Filing Date
GB29722/55A Expired GB771794A (en) 1953-05-01 1954-04-21 A telephone system
GB11529/54A Expired GB771793A (en) 1953-05-01 1954-04-21 A single motion numerical switch

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB11529/54A Expired GB771793A (en) 1953-05-01 1954-04-21 A single motion numerical switch

Country Status (5)

Country Link
US (1) US2748196A (en:Method)
BE (1) BE528518A (en:Method)
DE (2) DE954886C (en:Method)
FR (1) FR1114304A (en:Method)
GB (2) GB771794A (en:Method)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1276116B (de) * 1966-05-27 1969-05-29 Siemens Ag Schaltungsanordnung fuer Fernmeldevermittlungsanlagen, insbesondere Fernsprechanlagen, mit Pruefstromkreisen fuer Zwischenleitungspruefung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB324094A (en) * 1928-10-15 1930-01-15 Automatic Telephone Mfg Co Ltd Improvements in or relating to telephone systems
US1914391A (en) * 1931-08-19 1933-06-20 Siemens Ag Telephone system
GB439323A (en) * 1934-09-24 1935-12-04 Siemens Brothers & Co Ltd Improvements relating to automatic telephone and like selective systems
AT173486B (de) * 1951-09-05 1952-12-27 Siemens Ag Albis Schaltungsanordnung in Fernsprechanlagen mit Gruppenwählern

Also Published As

Publication number Publication date
GB771793A (en) 1957-04-03
FR1114304A (fr) 1956-04-11
DE960472C (de) 1957-03-21
BE528518A (en:Method)
US2748196A (en) 1956-05-29
DE954886C (de) 1956-12-27

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