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GB584677A - Improvements in or relating to telephone systems - Google Patents

Improvements in or relating to telephone systems

Info

Publication number
GB584677A
GB584677A GB8492/44A GB849244A GB584677A GB 584677 A GB584677 A GB 584677A GB 8492/44 A GB8492/44 A GB 8492/44A GB 849244 A GB849244 A GB 849244A GB 584677 A GB584677 A GB 584677A
Authority
GB
United Kingdom
Prior art keywords
signal
relay
clear
frequency
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
GB8492/44A
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 BE467392D priority Critical patent/BE467392A/xx
Application filed by Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Priority to GB8492/44A priority patent/GB584677A/en
Priority to US584620A priority patent/US2486100A/en
Publication of GB584677A publication Critical patent/GB584677A/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
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system
    • A—HUMAN NECESSITIES
    • A44—HABERDASHERY; JEWELLERY
    • A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
    • A44B19/00—Slide fasteners
    • A44B19/42—Making by processes not fully provided for in one other class, e.g. B21D53/50, B21F45/18, B22D17/16, B29D5/00
    • A44B19/44—Securing metal interlocking members to ready-made stringer tapes
    • A44B19/46—Securing separate interlocking members
    • A44B19/48—Arranging interlocking members before securing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Telephonic Communication Services (AREA)
GB8492/44A 1944-05-05 1944-05-05 Improvements in or relating to telephone systems Expired GB584677A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
BE467392D BE467392A (xx) 1944-05-05
GB8492/44A GB584677A (en) 1944-05-05 1944-05-05 Improvements in or relating to telephone systems
US584620A US2486100A (en) 1944-05-05 1945-03-24 Voice frequency signaling circuits for telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8492/44A GB584677A (en) 1944-05-05 1944-05-05 Improvements in or relating to telephone systems

Publications (1)

Publication Number Publication Date
GB584677A true GB584677A (en) 1947-01-21

Family

ID=9853491

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8492/44A Expired GB584677A (en) 1944-05-05 1944-05-05 Improvements in or relating to telephone systems

Country Status (3)

Country Link
US (1) US2486100A (xx)
BE (1) BE467392A (xx)
GB (1) GB584677A (xx)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2581462A (en) * 1947-04-29 1952-01-08 Int Standard Electric Corp Multipulse voice-frequency code signaling circuit

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2566009A (en) * 1947-12-12 1951-08-28 Automatic Elect Lab Interexchange switching telephone system
US2693526A (en) * 1949-06-15 1954-11-02 Automatic Elect Lab Single channel single frequency mobile radio telephone system
US2636947A (en) * 1949-12-16 1953-04-28 Bell Telephone Labor Inc Two-way trunk for pulse conversion systems

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2155176A (en) * 1936-11-07 1939-04-18 Associated Electric Lab Inc Telephone system
GB489755A (en) * 1937-01-25 1938-07-25 Standard Telephones Cables Ltd Improvements in or relating to electric signalling systems
NL64785C (xx) * 1943-02-13
US2368056A (en) * 1943-08-19 1945-01-23 Bell Telephone Labor Inc Signaling system
US2374884A (en) * 1943-08-19 1945-05-01 Bell Telephone Labor Inc Signaling system
US2425066A (en) * 1945-02-26 1947-08-05 Standard Telephones Cables Ltd Pulsed multiplex system employing different width and repetition frequencies for each channel

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2581462A (en) * 1947-04-29 1952-01-08 Int Standard Electric Corp Multipulse voice-frequency code signaling circuit

Also Published As

Publication number Publication date
US2486100A (en) 1949-10-25
BE467392A (xx)

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