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MUSHROOM JIB [1 record]

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Record 1 1999-05-11

English

Subject field(s)
  • Mining Equipment and Tools
DEF

A standard form of coal-cutter jib with a sprocket at the end remote from the machine. The sprocket carries a vertical turret or bar and is driven by the cutting chain. The bar makes a vertical cut at the back of the normal horizontal cut.

French

Domaine(s)
  • Outillage et équipement (Exploitation minière)
CONT

Le champignon de havage [...] Le champignon, inspiré des vieilles haveuses à barre, est un petit tambour court portant des couteaux disposés en hélice. Il est fixé verticalement sur l'axe de l'étoile de retour, qui, entraînée par la chaîne, entraîne à son tour le champignon. Généralement, celui-ci est au-dessus du bras. Il travaille ainsi mieux car les fines qu'il produit s'évacuent facilement. Il existe cependant des haveuses à champignon tourné vers le bas [...] et aussi des haveuses à double bras dont l'un ou les deux à la fois portent un champignon.

Spanish

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