FR50906E - Improvements to telephone systems - Google Patents

Improvements to telephone systems

Info

Publication number
FR50906E
FR50906E FR50906DA FR50906E FR 50906 E FR50906 E FR 50906E FR 50906D A FR50906D A FR 50906DA FR 50906 E FR50906 E FR 50906E
Authority
FR
France
Prior art keywords
telephone systems
telephone
systems
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
Other languages
French (fr)
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.)
Compagnie des Telephones Thomson Houston
Original Assignee
Compagnie des Telephones Thomson Houston
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 Compagnie des Telephones Thomson Houston filed Critical Compagnie des Telephones Thomson Houston
Application granted granted Critical
Publication of FR50906E publication Critical patent/FR50906E/en
Expired legal-status Critical Current

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
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Telephonic Communication Services (AREA)
FR50906D 1939-02-24 1939-08-25 Improvements to telephone systems Expired FR50906E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR50457T 1939-02-24

Publications (1)

Publication Number Publication Date
FR50906E true FR50906E (en) 1941-05-10

Family

ID=32187569

Family Applications (3)

Application Number Title Priority Date Filing Date
FR854039D Expired FR854039A (en) 1939-02-24 1938-12-05 Improvements to telephone systems
FR50457D Expired FR50457E (en) 1939-02-24 1939-02-24 Improvements to telephone systems
FR50906D Expired FR50906E (en) 1939-02-24 1939-08-25 Improvements to telephone systems

Family Applications Before (2)

Application Number Title Priority Date Filing Date
FR854039D Expired FR854039A (en) 1939-02-24 1938-12-05 Improvements to telephone systems
FR50457D Expired FR50457E (en) 1939-02-24 1939-02-24 Improvements to telephone systems

Country Status (2)

Country Link
US (2) US2431321A (en)
FR (3) FR854039A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR854039A (en) * 1939-02-24 1940-04-03 Cie Telephones Thomson Houston Improvements to telephone systems
US2603717A (en) * 1947-07-10 1952-07-15 Automatic Elect Lab Carrier telephone system
US2744963A (en) * 1953-12-14 1956-05-08 Gen Dynamics Corp Multi-office telephone system
US2797262A (en) * 1954-04-29 1957-06-25 Itt Automatic telephone systems

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1613246A (en) * 1922-11-15 1927-01-04 Western Electric Co Telephone-exchange system
GB336627A (en) * 1929-07-17 1930-10-17 Charles Edward Stevens Improvements in or relating to telephone systems
US2141372A (en) * 1935-10-16 1938-12-27 Bell Telephone Labor Inc Telephone system
US2155176A (en) * 1936-11-07 1939-04-18 Associated Electric Lab Inc Telephone system
FR854039A (en) * 1939-02-24 1940-04-03 Cie Telephones Thomson Houston Improvements to telephone systems

Also Published As

Publication number Publication date
FR854039A (en) 1940-04-03
US2468057A (en) 1949-04-26
US2431321A (en) 1947-11-25
FR50457E (en) 1940-11-14

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