FR28406E - Improvements to electrical switching devices - Google Patents

Improvements to electrical switching devices

Info

Publication number
FR28406E
FR28406E FR28406DA FR28406E FR 28406 E FR28406 E FR 28406E FR 28406D A FR28406D A FR 28406DA FR 28406 E FR28406 E FR 28406E
Authority
FR
France
Prior art keywords
switching devices
electrical switching
electrical
devices
switching
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 FR28406E publication Critical patent/FR28406E/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
    • H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
FR28406D 1923-11-14 1923-11-14 Improvements to electrical switching devices Expired FR28406E (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR28406T 1923-11-14

Publications (1)

Publication Number Publication Date
FR28406E true FR28406E (en) 1925-02-25

Family

ID=8666585

Family Applications (1)

Application Number Title Priority Date Filing Date
FR28406D Expired FR28406E (en) 1923-11-14 1923-11-14 Improvements to electrical switching devices

Country Status (1)

Country Link
FR (1) FR28406E (en)

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