FR782678A - Electrical signaling system - Google Patents

Electrical signaling system

Info

Publication number
FR782678A
FR782678A FR782678DA FR782678A FR 782678 A FR782678 A FR 782678A FR 782678D A FR782678D A FR 782678DA FR 782678 A FR782678 A FR 782678A
Authority
FR
France
Prior art keywords
signaling system
electrical signaling
electrical
signaling
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)
Inventor
Felix Frank Denzler
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 filed Critical
Application granted granted Critical
Publication of FR782678A publication Critical patent/FR782678A/en
Expired 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Alarm Systems (AREA)
  • Fire Alarms (AREA)
FR782678D 1933-12-08 1934-12-13 Electrical signaling system Expired FR782678A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US701447A US2093600A (en) 1933-12-08 1933-12-08 Electric signaling system

Publications (1)

Publication Number Publication Date
FR782678A true FR782678A (en) 1935-06-08

Family

ID=24817415

Family Applications (1)

Application Number Title Priority Date Filing Date
FR782678D Expired FR782678A (en) 1933-12-08 1934-12-13 Electrical signaling system

Country Status (3)

Country Link
US (1) US2093600A (en)
FR (1) FR782678A (en)
GB (1) GB453699A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2821699A (en) * 1955-12-30 1958-01-28 American District Telegraph Co Burglar alarm
US4945344A (en) * 1986-11-24 1990-07-31 Farrell Jonathon E Fluid flow sensor having light reflective slider

Also Published As

Publication number Publication date
US2093600A (en) 1937-09-21
GB453699A (en) 1936-09-08

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