FR526539A - Arrangement for suppressing cracking in the telephone when switching on different transmitters transformatively connected to the telephone, for example, acoustic signal devices - Google Patents

Arrangement for suppressing cracking in the telephone when switching on different transmitters transformatively connected to the telephone, for example, acoustic signal devices

Info

Publication number
FR526539A
FR526539A FR526539A FR526539DA FR526539A FR 526539 A FR526539 A FR 526539A FR 526539 A FR526539 A FR 526539A FR 526539D A FR526539D A FR 526539DA FR 526539 A FR526539 A FR 526539A
Authority
FR
France
Prior art keywords
telephone
transformatively
switching
arrangement
acoustic signal
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
FR526539A
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.)
Signal GmbH
Original Assignee
Signal GmbH
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 Signal GmbH filed Critical Signal GmbH
Application granted granted Critical
Publication of FR526539A publication Critical patent/FR526539A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/74—Interface circuits for coupling substations to external telephone lines with means for reducing interference; with means for reducing effects due to line faults

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Telephone Set Structure (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
FR526539A 1917-03-21 1920-07-07 Arrangement for suppressing cracking in the telephone when switching on different transmitters transformatively connected to the telephone, for example, acoustic signal devices Expired FR526539A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DES46449D DE363173C (en) 1917-03-21 1917-03-21 Device for avoiding crackling in the telephone when switching on various transmitters connected to the telephone in a transformer
DES46492D DE365295C (en) 1917-03-21 1917-03-31 Device for avoiding crackling in the telephone when switching on various transmitters connected to the telephone in a transformer

Publications (1)

Publication Number Publication Date
FR526539A true FR526539A (en) 1921-10-10

Family

ID=25752307

Family Applications (1)

Application Number Title Priority Date Filing Date
FR526539A Expired FR526539A (en) 1917-03-21 1920-07-07 Arrangement for suppressing cracking in the telephone when switching on different transmitters transformatively connected to the telephone, for example, acoustic signal devices

Country Status (4)

Country Link
DE (2) DE363173C (en)
FR (1) FR526539A (en)
GB (2) GB147948A (en)
NL (1) NL9296C (en)

Also Published As

Publication number Publication date
GB148418A (en) 1921-09-22
NL9296C (en) 1923-08-15
DE365295C (en) 1922-12-14
GB147948A (en) 1921-09-22
DE363173C (en) 1922-11-04

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