GB741545A - Improvements in or relating to automatic telephone exchange systems - Google Patents

Improvements in or relating to automatic telephone exchange systems

Info

Publication number
GB741545A
GB741545A GB2191/52A GB219152A GB741545A GB 741545 A GB741545 A GB 741545A GB 2191/52 A GB2191/52 A GB 2191/52A GB 219152 A GB219152 A GB 219152A GB 741545 A GB741545 A GB 741545A
Authority
GB
United Kingdom
Prior art keywords
line
tubes
tube
group
switch
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
GB2191/52A
Other languages
English (en)
Inventor
Lawrence John Murray
Alan Davison
Robin Devenish Allum
Ronald Threadgold
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 and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric 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
Priority to NL89659D priority Critical patent/NL89659C/xx
Priority to BE517178D priority patent/BE517178A/xx
Priority to NLAANVRAGE7311497,A priority patent/NL175544B/xx
Application filed by Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Priority to GB13998/54A priority patent/GB741589A/en
Priority to GB2191/52A priority patent/GB741545A/en
Priority to US331921A priority patent/US2761012A/en
Priority to FR1074036D priority patent/FR1074036A/fr
Priority to DEA20055A priority patent/DE964685C/de
Publication of GB741545A publication Critical patent/GB741545A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0004—Selecting arrangements using crossbar selectors in the switching stages

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Telephonic Communication Services (AREA)
GB2191/52A 1952-01-26 1952-01-26 Improvements in or relating to automatic telephone exchange systems Expired GB741545A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
NL89659D NL89659C (OSRAM) 1952-01-26
BE517178D BE517178A (OSRAM) 1952-01-26
NLAANVRAGE7311497,A NL175544B (nl) 1952-01-26 Verbrandingsinrichting voor huis- en industrieel afval.
GB13998/54A GB741589A (en) 1952-01-26 1952-01-26 Improvements in or relating to automatic telephone exchange systems
GB2191/52A GB741545A (en) 1952-01-26 1952-01-26 Improvements in or relating to automatic telephone exchange systems
US331921A US2761012A (en) 1952-01-26 1953-01-19 Telecommunication systems
FR1074036D FR1074036A (fr) 1952-01-26 1953-01-22 Perfectionnement aux installations de télécommunication
DEA20055A DE964685C (de) 1952-01-26 1953-01-24 Schaltungsanordnung fuer Fernsprechanlagen mit mehreren Schaltstufen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2191/52A GB741545A (en) 1952-01-26 1952-01-26 Improvements in or relating to automatic telephone exchange systems

Publications (1)

Publication Number Publication Date
GB741545A true GB741545A (en) 1955-12-07

Family

ID=9735183

Family Applications (2)

Application Number Title Priority Date Filing Date
GB2191/52A Expired GB741545A (en) 1952-01-26 1952-01-26 Improvements in or relating to automatic telephone exchange systems
GB13998/54A Expired GB741589A (en) 1952-01-26 1952-01-26 Improvements in or relating to automatic telephone exchange systems

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB13998/54A Expired GB741589A (en) 1952-01-26 1952-01-26 Improvements in or relating to automatic telephone exchange systems

Country Status (6)

Country Link
US (1) US2761012A (OSRAM)
BE (1) BE517178A (OSRAM)
DE (1) DE964685C (OSRAM)
FR (1) FR1074036A (OSRAM)
GB (2) GB741545A (OSRAM)
NL (2) NL175544B (OSRAM)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2960575A (en) * 1952-04-10 1960-11-15 Int Standard Electric Corp Automatic telecommunication systems
FR1058491A (fr) * 1952-06-18 1954-03-16 Constr Telephoniques Perfectionnements aux systèmes téléphoniques automatiques
US3007008A (en) * 1955-07-15 1961-10-31 North Electric Co Automatic telephone system
GB822409A (en) * 1956-06-14 1959-10-28 Siemens Edison Swan Ltd Improvements relating to automatic switching systems
NL220430A (OSRAM) * 1956-12-07
NL252009A (OSRAM) * 1958-01-15
GB890235A (OSRAM) * 1959-05-09 1900-01-01
GB983507A (en) * 1961-09-20 1965-02-17 Automatic Telephone & Elect Improvements in or relating to crossbar switches for use in automatic telephone systems
DE1266261B (de) * 1965-05-20 1968-04-18 Paurat F Stempel aus Holz fuer den Ausbau von Untertage-Raeumen, insbesondere fuer den Streckenausbau

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2326458A (en) * 1942-02-17 1943-08-10 Bell Telephone Labor Inc Selection system
FR973819A (OSRAM) * 1947-10-29 1951-02-15
US2609454A (en) * 1948-06-29 1952-09-02 Bell Telephone Labor Inc Selecting and lockout circuit
US2681386A (en) * 1948-07-13 1954-06-15 Automatic Telephone & Elect Electrical signaling system using nonlinear resistors for control

Also Published As

Publication number Publication date
BE517178A (OSRAM)
GB741589A (en) 1955-12-07
US2761012A (en) 1956-08-28
DE964685C (de) 1957-05-29
FR1074036A (fr) 1954-09-30
NL89659C (OSRAM)
NL175544B (nl)

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