GB270782A - Improvements in or relating to telephone systems - Google Patents

Improvements in or relating to telephone systems

Info

Publication number
GB270782A
GB270782A GB1315/26A GB131526A GB270782A GB 270782 A GB270782 A GB 270782A GB 1315/26 A GB1315/26 A GB 1315/26A GB 131526 A GB131526 A GB 131526A GB 270782 A GB270782 A GB 270782A
Authority
GB
United Kingdom
Prior art keywords
relay
busy
digit
over
release
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
GB1315/26A
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
Priority to BE270782D priority Critical patent/BE270782A/xx
Application filed by Automatic Telephone Manufacturing Co Ltd filed Critical Automatic Telephone Manufacturing Co Ltd
Priority to GB1315/26A priority patent/GB270782A/en
Priority to FR636798D priority patent/FR636798A/fr
Priority to US148120A priority patent/US1763901A/en
Publication of GB270782A publication Critical patent/GB270782A/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)
  • Telephonic Communication Services (AREA)
  • Interface Circuits In Exchanges (AREA)
GB1315/26A 1926-01-16 1926-01-16 Improvements in or relating to telephone systems Expired GB270782A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE270782D BE270782A (pt) 1926-01-16
GB1315/26A GB270782A (en) 1926-01-16 1926-01-16 Improvements in or relating to telephone systems
FR636798D FR636798A (fr) 1926-01-16 1926-11-03 Perfectionnements aux systèmes téléphoniques
US148120A US1763901A (en) 1926-01-16 1926-11-13 Telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1315/26A GB270782A (en) 1926-01-16 1926-01-16 Improvements in or relating to telephone systems

Publications (1)

Publication Number Publication Date
GB270782A true GB270782A (en) 1927-05-16

Family

ID=9719841

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1315/26A Expired GB270782A (en) 1926-01-16 1926-01-16 Improvements in or relating to telephone systems

Country Status (4)

Country Link
US (1) US1763901A (pt)
BE (1) BE270782A (pt)
FR (1) FR636798A (pt)
GB (1) GB270782A (pt)

Also Published As

Publication number Publication date
US1763901A (en) 1930-06-17
BE270782A (pt)
FR636798A (fr) 1928-04-16

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