Title: Control means for a coal plough

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Abstract: A coal plough which is movable to and fro in a mine working alongside a coal face, has floor-level cutters mounted on a carrier. The carrier is pivotable in a vertical plane about a horizontal axis perpendicular to the coal face. The carrier is pivotable between a working position, in which it bears against a first stop, and a non-working position, in which it bears against a second stop. The cutters bear against the floor of the working when the carrier is in the working position and are lifted clear of the floor when the carrier is in the non-working position. The first stop defines the level of cut of the cutters, and the second stop limits the upward pivotal movement of the carrier. The first and second stops are provided on the plough. The carrier is provided with cutter control means constituted by a peg which extends from the carrier towards the floor, the peg engaging the floor to move the carrier into the working position when the plough moves in one direction and to move the carrier into the non-working position when the plough moves in the opposite direction.


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