GB686751A - Improvements in automatic telephone-exchange systems - Google Patents

Improvements in automatic telephone-exchange systems

Info

Publication number
GB686751A
GB686751A GB11723/49A GB1172349A GB686751A GB 686751 A GB686751 A GB 686751A GB 11723/49 A GB11723/49 A GB 11723/49A GB 1172349 A GB1172349 A GB 1172349A GB 686751 A GB686751 A GB 686751A
Authority
GB
United Kingdom
Prior art keywords
finger
trunk
preselector
subscriber
magnet
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
GB11723/49A
Other languages
English (en)
Inventor
Benjamin Bertie Johnson
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.)
Telephone Manufacturing Co Ltd
Original Assignee
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
Priority to BE495462D priority Critical patent/BE495462A/xx
Application filed by Telephone Manufacturing Co Ltd filed Critical Telephone Manufacturing Co Ltd
Priority to GB11723/49A priority patent/GB686751A/en
Priority to US159322A priority patent/US2704786A/en
Publication of GB686751A publication Critical patent/GB686751A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0008—Selecting arrangements using relay selectors in the switching stages

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
GB11723/49A 1949-05-02 1949-05-02 Improvements in automatic telephone-exchange systems Expired GB686751A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE495462D BE495462A (enrdf_load_stackoverflow) 1949-05-02
GB11723/49A GB686751A (en) 1949-05-02 1949-05-02 Improvements in automatic telephone-exchange systems
US159322A US2704786A (en) 1949-05-02 1950-05-01 Automatic telephone-exchange systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB11723/49A GB686751A (en) 1949-05-02 1949-05-02 Improvements in automatic telephone-exchange systems

Publications (1)

Publication Number Publication Date
GB686751A true GB686751A (en) 1953-01-28

Family

ID=9991493

Family Applications (1)

Application Number Title Priority Date Filing Date
GB11723/49A Expired GB686751A (en) 1949-05-02 1949-05-02 Improvements in automatic telephone-exchange systems

Country Status (3)

Country Link
US (1) US2704786A (enrdf_load_stackoverflow)
BE (1) BE495462A (enrdf_load_stackoverflow)
GB (1) GB686751A (enrdf_load_stackoverflow)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1568039A (en) * 1922-11-06 1925-12-29 Western Electric Co Telephone-exchange system
US1529419A (en) * 1923-03-01 1925-03-10 Relay Automatic Telephone Co Telephone system
US1593387A (en) * 1924-07-05 1926-07-20 Western Electric Co Telephone-exchange system
US2039644A (en) * 1935-07-23 1936-05-05 Bell Telephone Labor Inc Selective switch
NL68615C (enrdf_load_stackoverflow) * 1941-02-08 1900-01-01
US2324624A (en) * 1941-10-15 1943-07-20 Bell Telephone Labor Inc Communication system
US2310634A (en) * 1941-10-15 1943-02-09 Bell Telephone Labor Inc Communication system
FR962487A (enrdf_load_stackoverflow) * 1947-02-07 1950-06-10

Also Published As

Publication number Publication date
US2704786A (en) 1955-03-22
BE495462A (enrdf_load_stackoverflow)

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