GB683893A - Improvements in or relating to automatic telephone exchange systems - Google Patents

Improvements in or relating to automatic telephone exchange systems

Info

Publication number
GB683893A
GB683893A GB23518/49A GB2351849A GB683893A GB 683893 A GB683893 A GB 683893A GB 23518/49 A GB23518/49 A GB 23518/49A GB 2351849 A GB2351849 A GB 2351849A GB 683893 A GB683893 A GB 683893A
Authority
GB
United Kingdom
Prior art keywords
relay
odd
impulse
switch
operates
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
GB23518/49A
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 Electric Laboratories Inc
Original Assignee
Automatic Electric Laboratories Inc
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 Automatic Electric Laboratories Inc filed Critical Automatic Electric Laboratories Inc
Publication of GB683893A publication Critical patent/GB683893A/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)
  • Relay Circuits (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
GB23518/49A 1948-10-25 1949-09-12 Improvements in or relating to automatic telephone exchange systems Expired GB683893A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US56363A US2635147A (en) 1948-10-25 1948-10-25 Telephone selector switch utilizing odd-even relay

Publications (1)

Publication Number Publication Date
GB683893A true GB683893A (en) 1952-12-10

Family

ID=22003897

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23518/49A Expired GB683893A (en) 1948-10-25 1949-09-12 Improvements in or relating to automatic telephone exchange systems

Country Status (3)

Country Link
US (1) US2635147A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
FR (1) FR996361A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)
GB (1) GB683893A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2721902A (en) * 1951-12-26 1955-10-25 Gen Dynamics Corp Selector circuit
US2725427A (en) * 1952-05-03 1955-11-29 Gen Dynamics Corp Trunking arrangement for telecommunication system
BE527777A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1953-04-27
US2810788A (en) * 1953-05-11 1957-10-22 Gen Telephone Lab Inc Telephone system using single-motion numerical switches

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1569936A (en) * 1923-10-24 1926-01-19 American Telephone & Telegraph Machine-switching system
US1849694A (en) * 1930-01-23 1932-03-15 Associated Electric Lab Inc Automatic telephone system
GB355924A (en) * 1930-08-07 1931-09-03 Siemens Brothers & Co Ltd Improvements relating to automatic telephone systems
US1924661A (en) * 1931-05-04 1933-08-29 Ass Telephone & Telegraph Co Telephone system
GB378586A (en) * 1931-06-13 1932-08-18 Siemens Brothers & Co Ltd Improvements relating to automatic telephone systems
FR744372A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1931-11-09 1933-04-19
US2090522A (en) * 1934-04-04 1937-08-17 Gen Electric Electrical control device
NL63264C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) * 1940-04-11
US2294907A (en) * 1941-01-17 1942-09-08 Bell Telephone Labor Inc Telephone system
GB571520A (en) * 1944-01-12 1945-08-28 Siemens Brothers & Co Ltd Improvements relating to electric selective signalling systems
GB578984A (en) * 1945-01-01 1946-07-18 Siemens Brothers & Co Ltd Improvements relating to automatic telephone systems
US2458262A (en) * 1946-01-30 1949-01-04 Automatic Elect Lab Relay selector circuit arranged to simultaneously test a selected group of trunks

Also Published As

Publication number Publication date
FR996361A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1951-12-17
US2635147A (en) 1953-04-14

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