GB571908A - Improvements in or relating to telephone or like systems - Google Patents

Improvements in or relating to telephone or like systems

Info

Publication number
GB571908A
GB571908A GB3129/44A GB312944A GB571908A GB 571908 A GB571908 A GB 571908A GB 3129/44 A GB3129/44 A GB 3129/44A GB 312944 A GB312944 A GB 312944A GB 571908 A GB571908 A GB 571908A
Authority
GB
United Kingdom
Prior art keywords
impulse
relay
train
break
make
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
GB3129/44A
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 and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric 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 BE469898D priority Critical patent/BE469898A/xx
Application filed by Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Priority to GB3129/44A priority patent/GB571908A/en
Priority to US567229A priority patent/US2475546A/en
Publication of GB571908A publication Critical patent/GB571908A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
GB3129/44A 1944-02-19 1944-02-19 Improvements in or relating to telephone or like systems Expired GB571908A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE469898D BE469898A (enrdf_load_stackoverflow) 1944-02-19
GB3129/44A GB571908A (en) 1944-02-19 1944-02-19 Improvements in or relating to telephone or like systems
US567229A US2475546A (en) 1944-02-19 1944-12-18 Impulse correcting repeater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3129/44A GB571908A (en) 1944-02-19 1944-02-19 Improvements in or relating to telephone or like systems

Publications (1)

Publication Number Publication Date
GB571908A true GB571908A (en) 1945-09-13

Family

ID=9752463

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3129/44A Expired GB571908A (en) 1944-02-19 1944-02-19 Improvements in or relating to telephone or like systems

Country Status (3)

Country Link
US (1) US2475546A (enrdf_load_stackoverflow)
BE (1) BE469898A (enrdf_load_stackoverflow)
GB (1) GB571908A (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR954202A (fr) * 1946-10-11 1949-12-21 Automatic Elect Lab Système téléphonique à commutation automatique, notamment pour appels interurbains
US3003040A (en) * 1956-01-25 1961-10-03 Gen Dynamics Corp Modified trunk circuit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1606199A (en) * 1923-09-18 1926-11-09 Western Electric Co Telephone-exchange system
US1829803A (en) * 1930-08-04 1931-11-03 Bell Telephone Labor Inc Telephone system
US2153654A (en) * 1935-06-15 1939-04-11 Panstwowe Zaklady Tele I Radjo System of tone-signaling and impulsing
GB534866A (en) * 1939-10-16 1941-03-20 Siemens Brothers & Co Ltd Improvements relating to telephone and like signalling systems
GB559016A (en) * 1942-07-28 1944-02-01 Automatic Telephone & Elect Improvements in or relating to telephone or like systems

Also Published As

Publication number Publication date
BE469898A (enrdf_load_stackoverflow)
US2475546A (en) 1949-07-05

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