DE307819C - - Google Patents

Info

Publication number
DE307819C
DE307819C DENDAT307819D DE307819DA DE307819C DE 307819 C DE307819 C DE 307819C DE NDAT307819 D DENDAT307819 D DE NDAT307819D DE 307819D A DE307819D A DE 307819DA DE 307819 C DE307819 C DE 307819C
Authority
DE
Germany
Prior art keywords
armature
pendulum
membrane
periods
alternating current
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
DENDAT307819D
Other languages
German (de)
English (en)
Publication of DE307819C publication Critical patent/DE307819C/de
Active legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B5/00—Visible signalling systems, e.g. visible personal calling systems or remote indication of seats occupied
    • G08B5/22—Visible signalling systems, e.g. visible personal calling systems or remote indication of seats occupied using electric transmission; using electromagnetic transmission
    • G08B5/24—Visible signalling systems, e.g. visible personal calling systems or remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane
    • G08B5/28—Visible signalling systems, e.g. visible personal calling systems or remote indication of seats occupied using electric transmission; using electromagnetic transmission with indicator element moving about a pivot, e.g. hinged flap or rotating vane with hinged flap or arm

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Burglar Alarm Systems (AREA)
DENDAT307819D Active DE307819C (en:Method)

Publications (1)

Publication Number Publication Date
DE307819C true DE307819C (en:Method)

Family

ID=561125

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT307819D Active DE307819C (en:Method)

Country Status (1)

Country Link
DE (1) DE307819C (en:Method)

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