GB302217A - Improvements in or relating to automatic or semi-automatic telephone systems - Google Patents

Improvements in or relating to automatic or semi-automatic telephone systems

Info

Publication number
GB302217A
GB302217A GB32131/28A GB3213128A GB302217A GB 302217 A GB302217 A GB 302217A GB 32131/28 A GB32131/28 A GB 32131/28A GB 3213128 A GB3213128 A GB 3213128A GB 302217 A GB302217 A GB 302217A
Authority
GB
United Kingdom
Prior art keywords
relays
digit
control
impulses
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
GB32131/28A
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.)
Associated Telephone and Telegraph Co
Original Assignee
Associated Telephone and Telegraph Co
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 Associated Telephone and Telegraph Co filed Critical Associated Telephone and Telegraph Co
Publication of GB302217A publication Critical patent/GB302217A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Relay Circuits (AREA)
GB32131/28A 1927-08-09 1927-08-09 Improvements in or relating to automatic or semi-automatic telephone systems Expired GB302217A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB21042/27A GB302200A (en) 1927-08-09 1927-08-09 Improvements in or relating to automatic or semi-automatic telephone systems

Publications (1)

Publication Number Publication Date
GB302217A true GB302217A (en) 1928-12-10

Family

ID=10156190

Family Applications (2)

Application Number Title Priority Date Filing Date
GB32131/28A Expired GB302217A (en) 1927-08-09 1927-08-09 Improvements in or relating to automatic or semi-automatic telephone systems
GB21042/27A Expired GB302200A (en) 1927-08-09 1927-08-09 Improvements in or relating to automatic or semi-automatic telephone systems

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB21042/27A Expired GB302200A (en) 1927-08-09 1927-08-09 Improvements in or relating to automatic or semi-automatic telephone systems

Country Status (3)

Country Link
US (1) US1837003A (enrdf_load_stackoverflow)
FR (2) FR702872A (enrdf_load_stackoverflow)
GB (2) GB302217A (enrdf_load_stackoverflow)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL71657C (enrdf_load_stackoverflow) * 1940-06-11
US2421717A (en) * 1943-04-28 1947-06-03 Kellogg Switchboard & Supply Automatic telephone system
GB577648A (en) * 1944-04-01 1946-05-27 Automatic Telephone & Elect Improvements in or relating to telephone systems
GB586380A (en) * 1944-12-08 1947-03-17 Automatic Telephone & Elect Improvements in telephone systems

Also Published As

Publication number Publication date
GB302200A (en) 1928-12-10
FR702872A (fr) 1931-04-18
FR39002E (enrdf_load_stackoverflow) 1931-08-25
US1837003A (en) 1931-12-15

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