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FR542847A - Appareil de sécurité et avertisseur - Google Patents

Appareil de sécurité et avertisseur

Info

Publication number
FR542847A
FR542847A FR542847DA FR542847A FR 542847 A FR542847 A FR 542847A FR 542847D A FR542847D A FR 542847DA FR 542847 A FR542847 A FR 542847A
Authority
FR
France
Prior art keywords
alarm
security device
security
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
English (en)
Inventor
Georges-Louis Duthuit
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 FR542847A publication Critical patent/FR542847A/fr
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L3/00—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal
    • B61L3/02—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control
    • B61L3/04—Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal at selected places along the route, e.g. intermittent control simultaneous mechanical and electrical control controlling mechanically

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
FR542847D 1921-10-28 1921-10-28 Appareil de sécurité et avertisseur Expired FR542847A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR542847T 1921-10-28

Publications (1)

Publication Number Publication Date
FR542847A true FR542847A (fr) 1922-08-22

Family

ID=8931166

Family Applications (1)

Application Number Title Priority Date Filing Date
FR542847D Expired FR542847A (fr) 1921-10-28 1921-10-28 Appareil de sécurité et avertisseur

Country Status (1)

Country Link
FR (1) FR542847A (fr)

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