FR697224A - Improvements to telephone installations - Google Patents

Improvements to telephone installations

Info

Publication number
FR697224A
FR697224A FR697224DA FR697224A FR 697224 A FR697224 A FR 697224A FR 697224D A FR697224D A FR 697224DA FR 697224 A FR697224 A FR 697224A
Authority
FR
France
Prior art keywords
telephone installations
installations
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)
Inventor
K Larson
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Application granted granted Critical
Publication of FR697224A publication Critical patent/FR697224A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/62—Co-operating movable contacts operated by separate electrical actuating means

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
FR697224D 1929-06-21 1930-06-11 Improvements to telephone installations Expired FR697224A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE356217X 1929-06-21

Publications (1)

Publication Number Publication Date
FR697224A true FR697224A (en) 1931-01-13

Family

ID=20308795

Family Applications (1)

Application Number Title Priority Date Filing Date
FR697224D Expired FR697224A (en) 1929-06-21 1930-06-11 Improvements to telephone installations

Country Status (4)

Country Link
US (1) US1819683A (en)
DE (1) DE570868C (en)
FR (1) FR697224A (en)
GB (1) GB356217A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6771154B1 (en) * 1999-11-12 2004-08-03 Taiko Device, Ltd. Electromagnetic relay

Also Published As

Publication number Publication date
US1819683A (en) 1931-08-18
GB356217A (en) 1931-09-04
DE570868C (en) 1933-02-21

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