FR517729A - Improvements made to central telephone offices - Google Patents

Improvements made to central telephone offices

Info

Publication number
FR517729A
FR517729A FR517729A FR517729DA FR517729A FR 517729 A FR517729 A FR 517729A FR 517729 A FR517729 A FR 517729A FR 517729D A FR517729D A FR 517729DA FR 517729 A FR517729 A FR 517729A
Authority
FR
France
Prior art keywords
improvements made
central telephone
telephone offices
offices
central
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
FR517729A
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
Priority claimed from US304144A external-priority patent/US1435333A/en
Application filed by Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR517729A publication Critical patent/FR517729A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0016—Arrangements providing connection between exchanges
    • 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
FR517729A 1919-06-14 1920-06-24 Improvements made to central telephone offices Expired FR517729A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US304212A US1482618A (en) 1919-06-14 1919-06-14 Telephone-exchange system
US304144A US1435333A (en) 1919-06-14 1919-06-14 Telephone-exchange system
US377980A US1459186A (en) 1919-06-14 1920-04-30 Telephone-exchange system
GB34853/22A GB211639A (en) 1919-06-14 1922-12-21 Improvements in or relating to telephone systems
NL23511A NL16516C (en) 1919-06-14 1923-01-05

Publications (1)

Publication Number Publication Date
FR517729A true FR517729A (en) 1921-05-10

Family

ID=40289120

Family Applications (1)

Application Number Title Priority Date Filing Date
FR517729A Expired FR517729A (en) 1919-06-14 1920-06-24 Improvements made to central telephone offices

Country Status (5)

Country Link
US (2) US1482618A (en)
DE (1) DE416087C (en)
FR (1) FR517729A (en)
GB (2) GB146517A (en)
NL (2) NL9144C (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2662935A (en) * 1953-12-15 Register system for receiving
US2618708A (en) * 1942-08-06 1952-11-18 Automatic Elect Lab Telephone system with main and secondary register
US2633496A (en) * 1948-04-05 1953-03-31 Standard Telephones Cables Ltd Party-line telephone system
US2604539A (en) * 1948-04-05 1952-07-22 Standard Telephones Cables Ltd Automatic telephone switching system
US2528269A (en) * 1948-05-11 1950-10-31 American Telephone & Telegraph Selector switch control for automatic telephone systems
GB717690A (en) * 1951-07-25 1954-11-03 British Telecomm Res Ltd Improvements in or relating to automatic telephone and like systems

Also Published As

Publication number Publication date
US1459186A (en) 1923-06-19
DE416087C (en) 1925-07-10
GB146517A (en) 1921-10-05
GB211639A (en) 1924-02-28
NL9144C (en) 1923-06-15
NL16516C (en) 1927-07-15
US1482618A (en) 1924-02-05

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