FR673919A - Montant métallique élastique avertisseur, pour mines - Google Patents

Montant métallique élastique avertisseur, pour mines

Info

Publication number
FR673919A
FR673919A FR673919DA FR673919A FR 673919 A FR673919 A FR 673919A FR 673919D A FR673919D A FR 673919DA FR 673919 A FR673919 A FR 673919A
Authority
FR
France
Prior art keywords
mines
warning
elastic metal
metal post
post
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
Friedrich Reidiger
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 FR673919A publication Critical patent/FR673919A/fr
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
    • E21D15/24—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with axial screw-and-nut, rack-and-worm, or like mechanism

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
FR673919D 1928-04-27 1929-04-23 Montant métallique élastique avertisseur, pour mines Expired FR673919A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE673919X 1928-04-27

Publications (1)

Publication Number Publication Date
FR673919A true FR673919A (fr) 1930-01-21

Family

ID=6590975

Family Applications (1)

Application Number Title Priority Date Filing Date
FR673919D Expired FR673919A (fr) 1928-04-27 1929-04-23 Montant métallique élastique avertisseur, pour mines

Country Status (1)

Country Link
FR (1) FR673919A (fr)

Similar Documents

Publication Publication Date Title
FR673919A (fr) Montant métallique élastique avertisseur, pour mines
FR668549A (fr) Poteau métallique
FR697806A (fr) Montant métallique élastique, pour mines
CH138648A (de) Stahllegierung.
FR668731A (fr) Bouchage métallique
FR653900A (fr) Alliage métallique perfectionné
FR647919A (fr) Indicateur de direction pour cyclistes
FR665468A (fr) Verseur de sécurité
FR648249A (fr) Poteau métallique
FR653677A (fr) Diffuseur-haut-parleur pour t. s. f.
DK43594C (da) Signaleringssystem.
FR629027A (fr) Bouchons pour horlogerie
FR671124A (fr) Acier
CH126020A (de) Stahlhalter.
FR653901A (fr) Alliage métallique
FR652381A (fr) Attache pour bouchons
FR669551A (fr) Alliage
SU16567A1 (ru) Устройство дл шахтной сигнализации
DK41616C (da) Metalfad.
FR641182A (fr) Barrière métallique
AT121526B (de) Silizium-Mangan-Nickel-Kupfer-Legierungen.
FR649829A (fr) Plomb de sûreté en fer-blanc
DK41559C (da) Slipsholder.
FR664847A (fr) Alliage
ES111262A1 (es) Estampa de acero.