FR22574E - Improvements to telephone systems using auto-mechanical action switches - Google Patents

Improvements to telephone systems using auto-mechanical action switches

Info

Publication number
FR22574E
FR22574E FR22574A FR22574DA FR22574E FR 22574 E FR22574 E FR 22574E FR 22574 A FR22574 A FR 22574A FR 22574D A FR22574D A FR 22574DA FR 22574 E FR22574 E FR 22574E
Authority
FR
France
Prior art keywords
auto
mechanical action
telephone systems
action switches
switches
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
FR22574A
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 FR22574E publication Critical patent/FR22574E/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)
  • Monitoring And Testing Of Exchanges (AREA)
FR22574A 1918-12-28 1919-08-13 Improvements to telephone systems using auto-mechanical action switches Expired FR22574E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US268649A US1518815A (en) 1918-12-28 1918-12-28 Machine-switching telephone-exchange system

Publications (1)

Publication Number Publication Date
FR22574E true FR22574E (en) 1921-07-23

Family

ID=23023903

Family Applications (5)

Application Number Title Priority Date Filing Date
FR24339A Expired FR24339E (en) 1918-12-28 Improvements to telephone systems using self-mechanical switches
FR512156A Expired FR512156A (en) 1918-12-28 1919-06-26 Improvements to telephone systems using self-mechanical switches
FR22574A Expired FR22574E (en) 1918-12-28 1919-08-13 Improvements to telephone systems using auto-mechanical action switches
FR22575A Expired FR22575E (en) 1918-12-28 1919-08-14 Improvements to telephone systems using self-mechanical switches
FR26385D Expired FR26385E (en) 1918-12-28 1922-05-17 Improvements to telephone systems using self-mechanical switches

Family Applications Before (2)

Application Number Title Priority Date Filing Date
FR24339A Expired FR24339E (en) 1918-12-28 Improvements to telephone systems using self-mechanical switches
FR512156A Expired FR512156A (en) 1918-12-28 1919-06-26 Improvements to telephone systems using self-mechanical switches

Family Applications After (2)

Application Number Title Priority Date Filing Date
FR22575A Expired FR22575E (en) 1918-12-28 1919-08-14 Improvements to telephone systems using self-mechanical switches
FR26385D Expired FR26385E (en) 1918-12-28 1922-05-17 Improvements to telephone systems using self-mechanical switches

Country Status (2)

Country Link
US (2) US1518815A (en)
FR (5) FR512156A (en)

Also Published As

Publication number Publication date
FR24339E (en) 1922-06-20
FR22575E (en) 1921-07-23
FR512156A (en) 1921-01-17
US1518815A (en) 1924-12-09
US1365269A (en) 1921-01-11
FR26385E (en) 1923-11-13

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