DE274903C - - Google Patents

Info

Publication number
DE274903C
DE274903C DENDAT274903D DE274903DA DE274903C DE 274903 C DE274903 C DE 274903C DE NDAT274903 D DENDAT274903 D DE NDAT274903D DE 274903D A DE274903D A DE 274903DA DE 274903 C DE274903 C DE 274903C
Authority
DE
Germany
Prior art keywords
contact
test
holding relay
alarm bells
safety
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
DENDAT274903D
Other languages
German (de)
English (en)
Publication of DE274903C publication Critical patent/DE274903C/de
Active legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
    • G08B29/02—Monitoring continuously signalling or alarm systems
    • G08B29/06—Monitoring of the line circuits, e.g. signalling of line faults
    • G08B29/08—Signalling of tampering with the line circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
  • Burglar Alarm Systems (AREA)
DENDAT274903D Active DE274903C (cg-RX-API-DMAC7.html)

Publications (1)

Publication Number Publication Date
DE274903C true DE274903C (cg-RX-API-DMAC7.html)

Family

ID=531234

Family Applications (1)

Application Number Title Priority Date Filing Date
DENDAT274903D Active DE274903C (cg-RX-API-DMAC7.html)

Country Status (1)

Country Link
DE (1) DE274903C (cg-RX-API-DMAC7.html)

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