GB679544A - Improvements in or relating to telecommunication systems - Google Patents

Improvements in or relating to telecommunication systems

Info

Publication number
GB679544A
GB679544A GB303949A GB303949A GB679544A GB 679544 A GB679544 A GB 679544A GB 303949 A GB303949 A GB 303949A GB 303949 A GB303949 A GB 303949A GB 679544 A GB679544 A GB 679544A
Authority
GB
United Kingdom
Prior art keywords
lead
relays
relay
over
line
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
GB303949A
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.)
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
Priority to BE493564D priority Critical patent/BE493564A/xx
Application filed by Individual filed Critical Individual
Priority to GB303949A priority patent/GB679544A/en
Priority to FR1013585D priority patent/FR1013585A/fr
Publication of GB679544A publication Critical patent/GB679544A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
GB303949A 1949-02-03 1949-02-03 Improvements in or relating to telecommunication systems Expired GB679544A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE493564D BE493564A (instruction) 1949-02-03
GB303949A GB679544A (en) 1949-02-03 1949-02-03 Improvements in or relating to telecommunication systems
FR1013585D FR1013585A (fr) 1949-02-03 1950-02-02 Perfectionnements apportés aux dispositifs de télécommunication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB303949A GB679544A (en) 1949-02-03 1949-02-03 Improvements in or relating to telecommunication systems

Publications (1)

Publication Number Publication Date
GB679544A true GB679544A (en) 1952-09-17

Family

ID=9750782

Family Applications (1)

Application Number Title Priority Date Filing Date
GB303949A Expired GB679544A (en) 1949-02-03 1949-02-03 Improvements in or relating to telecommunication systems

Country Status (3)

Country Link
BE (1) BE493564A (instruction)
FR (1) FR1013585A (instruction)
GB (1) GB679544A (instruction)

Also Published As

Publication number Publication date
BE493564A (instruction)
FR1013585A (fr) 1952-07-30

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