FR681159A - Improvements to switching devices for automatic or semi-automatic telephone systems - Google Patents

Improvements to switching devices for automatic or semi-automatic telephone systems

Info

Publication number
FR681159A
FR681159A FR681159DA FR681159A FR 681159 A FR681159 A FR 681159A FR 681159D A FR681159D A FR 681159DA FR 681159 A FR681159 A FR 681159A
Authority
FR
France
Prior art keywords
automatic
semi
switching devices
telephone systems
automatic telephone
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR681159A publication Critical patent/FR681159A/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

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)
FR681159D 1928-06-13 1929-06-17 Improvements to switching devices for automatic or semi-automatic telephone systems Expired FR681159A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB17101/28A GB318945A (en) 1928-06-13 1928-06-13 Improvements in and relating to automatic and semi-automatic exchange systems

Publications (1)

Publication Number Publication Date
FR681159A true FR681159A (en) 1930-05-15

Family

ID=10089263

Family Applications (1)

Application Number Title Priority Date Filing Date
FR681159D Expired FR681159A (en) 1928-06-13 1929-06-17 Improvements to switching devices for automatic or semi-automatic telephone systems

Country Status (4)

Country Link
US (1) US1830935A (en)
DE (1) DE575322C (en)
FR (1) FR681159A (en)
GB (4) GB318957A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB592989A (en) * 1945-05-04 1947-10-06 Siemens Brothers & Co Ltd Improvements relating to automatic telephone systems
US3875346A (en) * 1974-02-25 1975-04-01 Communic Mfg Revertive pulsing

Also Published As

Publication number Publication date
DE575322C (en) 1933-04-27
GB318957A (en) 1929-09-13
GB318945A (en) 1929-09-13
US1830935A (en) 1931-11-10
GB319063A (en) 1929-09-13
GB318956A (en) 1929-09-13

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