GB572002A - Improvements in telephone or like signalling systems - Google Patents

Improvements in telephone or like signalling systems

Info

Publication number
GB572002A
GB572002A GB3338/44A GB333844A GB572002A GB 572002 A GB572002 A GB 572002A GB 3338/44 A GB3338/44 A GB 3338/44A GB 333844 A GB333844 A GB 333844A GB 572002 A GB572002 A GB 572002A
Authority
GB
United Kingdom
Prior art keywords
impulse
impulses
ebb
relay
emm
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
GB3338/44A
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 BE467075D priority Critical patent/BE467075A/xx
Application filed by Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Priority to GB3338/44A priority patent/GB572002A/en
Priority to US567230A priority patent/US2424452A/en
Publication of GB572002A publication Critical patent/GB572002A/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
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)
  • Interface Circuits In Exchanges (AREA)
GB3338/44A 1944-02-23 1944-02-23 Improvements in telephone or like signalling systems Expired GB572002A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE467075D BE467075A (enrdf_load_stackoverflow) 1944-02-23
GB3338/44A GB572002A (en) 1944-02-23 1944-02-23 Improvements in telephone or like signalling systems
US567230A US2424452A (en) 1944-02-23 1944-12-08 Voice frequency and direct current impulse repeating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3338/44A GB572002A (en) 1944-02-23 1944-02-23 Improvements in telephone or like signalling systems

Publications (1)

Publication Number Publication Date
GB572002A true GB572002A (en) 1945-09-18

Family

ID=9756430

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3338/44A Expired GB572002A (en) 1944-02-23 1944-02-23 Improvements in telephone or like signalling systems

Country Status (3)

Country Link
US (1) US2424452A (enrdf_load_stackoverflow)
BE (1) BE467075A (enrdf_load_stackoverflow)
GB (1) GB572002A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2651679A (en) * 1947-02-07 1953-09-08 Int Standard Electric Corp Electric signaling system
DE1021016B (de) * 1955-04-29 1957-12-19 Standard Elektrik Ag Schaltungsanordnung fuer Fernmelde- und Fernwirkanlagen zur Signaluebertragung nach einem Frequenzkodesystem

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB641888A (en) * 1947-02-07 1950-08-23 Standard Telephones Cables Ltd Improvements in or relating to electric signalling systems
US2566009A (en) * 1947-12-12 1951-08-28 Automatic Elect Lab Interexchange switching telephone system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1881273A (en) * 1931-01-07 1932-10-04 Western Electric Co Telephone system
FR744153A (enrdf_load_stackoverflow) * 1931-11-07 1933-04-13
US2310749A (en) * 1942-03-31 1943-02-09 Bell Telephone Labor Inc Singaling system
GB559016A (en) * 1942-07-28 1944-02-01 Automatic Telephone & Elect Improvements in or relating to telephone or like systems

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2651679A (en) * 1947-02-07 1953-09-08 Int Standard Electric Corp Electric signaling system
DE1021016B (de) * 1955-04-29 1957-12-19 Standard Elektrik Ag Schaltungsanordnung fuer Fernmelde- und Fernwirkanlagen zur Signaluebertragung nach einem Frequenzkodesystem

Also Published As

Publication number Publication date
BE467075A (enrdf_load_stackoverflow)
US2424452A (en) 1947-07-22

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