DE169903C - - Google Patents

Info

Publication number
DE169903C
DE169903C DENDAT169903D DE169903DA DE169903C DE 169903 C DE169903 C DE 169903C DE NDAT169903 D DENDAT169903 D DE NDAT169903D DE 169903D A DE169903D A DE 169903DA DE 169903 C DE169903 C DE 169903C
Authority
DE
Germany
Prior art keywords
electromagnet
tuning fork
circuit
bell
armature
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.)
Active
Application number
DENDAT169903D
Other languages
German (de)
English (en)
Publication of DE169903C publication Critical patent/DE169903C/de
Active legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M19/00Current supply arrangements for telephone systems
    • H04M19/02Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/04Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone the ringing-current being generated at the substations

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Breakers (AREA)
DENDAT169903D Active DE169903C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Publications (1)

Publication Number Publication Date
DE169903C true DE169903C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Family

ID=434988

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT169903D Active DE169903C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Country Status (1)

Country Link
DE (1) DE169903C (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

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