a. A cutter loader with knives to slice the coal off the face. Nelson
b. This device carries steel blades that shear or plane off coal to a limited depth and plow it onto the face conveyor. The plow is hauled backward and forward along the coal face by steel ropes or chains operated by winches in the gate roads, and it planes off a thickness of 11.8 in (30 cm) to a height one-third to one-half the seam thickness each time. The coal is conveyed along the face by a double-chain conveyor with double-ended drive; the conveyor sections are articulated to allow for bends in its tracks and are moved bodily forward at each passage of the plow, either by compressed-air jacks or by means of a torpedo or trailer attached by rope to the plow and an auxiliary drum on the winches. Its uses are limited to softer coal seams, or to suitably prepared coal. Also called kohlenhobel. Mason
Source:
Dictionary of Mining, Mineral, and Related Terms












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