BE480490A - - Google Patents

Info

Publication number
BE480490A
BE480490A BE480490DA BE480490A BE 480490 A BE480490 A BE 480490A BE 480490D A BE480490D A BE 480490DA BE 480490 A BE480490 A BE 480490A
Authority
BE
Belgium
Application number
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.)
Publication of BE480490A publication Critical patent/BE480490A/xx
Priority claimed from US743964A external-priority patent/US2588685A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • 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
    • H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
    • H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • 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)
  • Exchange Systems With Centralized Control (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Meter Arrangements (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Selective Calling Equipment (AREA)
BE480490D 1939-07-26 BE480490A (it)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB2588685X 1939-07-26
GB267229X 1939-08-09
GB2613278X 1940-01-05
US743964A US2588685A (en) 1939-07-26 1947-04-25 Register-sender for automatic telephony
US130127A US2613274A (en) 1939-07-26 1949-11-30 Automatic recording of telephone numbers

Publications (1)

Publication Number Publication Date
BE480490A true BE480490A (it)

Family

ID=32303753

Family Applications (1)

Application Number Title Priority Date Filing Date
BE480490D BE480490A (it) 1939-07-26

Country Status (5)

Country Link
US (2) US2613278A (it)
BE (1) BE480490A (it)
CH (1) CH267229A (it)
FR (3) FR947899A (it)
GB (6) GB532729A (it)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2588685A (en) * 1939-07-26 1952-03-11 Automatic Elect Lab Register-sender for automatic telephony
BE480490A (it) * 1939-07-26
US2588686A (en) * 1940-04-01 1952-03-11 Automatic Elect Lab Telephone system providing operator service when all trunks are busy
FR961461A (it) * 1942-06-27 1950-05-12
BE468835A (it) * 1945-11-08
BE520982A (it) * 1951-08-16
US2871297A (en) * 1954-03-08 1959-01-27 Itt 100-line direct-access crossbar telephone switching unit
US2875286A (en) * 1955-04-21 1959-02-24 North Electric Co Telephone call surveying equipment
US2912542A (en) * 1956-12-03 1959-11-10 Gen Telephone Lab Inc Relay assembly

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1724174A (en) * 1929-08-13 To automatic electbic inc
GB346368A (en) * 1930-01-07 1931-04-07 Standard Telephones Cables Ltd Improvements in or relating to automatic or semi-automatic telephone exchange systems
FR738032A (it) * 1931-06-02 1932-12-20
US2165924A (en) * 1933-10-31 1939-07-11 Bell Telephone Labor Inc Telephone system
US2180824A (en) * 1937-03-10 1939-11-21 Western Electric Co Automatic call ticketing system
US2273165A (en) * 1938-04-06 1942-02-17 Western Electric Co Tariff determining equipment for telephone systems
GB516416A (en) * 1938-06-14 1940-01-01 Ass Telephone & Telegraph Co Improvements in or relating to automatic or semi-automatic telephone systems
US2373908A (en) * 1938-06-14 1945-04-17 Automatic Elect Lab Telephone system
US2486722A (en) * 1938-06-21 1949-11-01 Automatic Elect Lab Automatic toll-ticketing telephone system
GB524003A (en) * 1939-01-19 1940-07-26 Ass Telephone & Telegraph Co Improvements in or relating to telephone systems
GB530443A (en) * 1939-05-11 1940-12-12 Ass Telephone & Telegraph Co Improvements in or relating to telephone systems
BE480490A (it) * 1939-07-26
US2385228A (en) * 1940-08-26 1945-09-18 Automatic Elect Lab Telephone system

Also Published As

Publication number Publication date
US2613274A (en) 1952-10-07
US2613278A (en) 1952-10-07
GB532730A (en) 1941-01-30
GB532728A (en) 1941-01-30
GB540128A (en) 1941-10-07
FR947899A (fr) 1949-07-15
GB573869A (en) 1945-12-11
FR56826E (fr) 1952-10-07
FR57210E (fr) 1952-12-23
GB532729A (en) 1941-01-30
GB545182A (en) 1942-05-14
CH267229A (fr) 1950-03-15

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