Control for mining machine
First Claim
1. In a mining machine having means for traversing a ground surface and a universally-pivotal carrier arm of variable length which carries at its forward end a cutter drum rotatable about the axis of the carrier arm;
- the improvement in said mining machine which comprises;
a displacement pickup responsive to forward and aft movement of the cutter drum with respect to said ground surface, andmeans connected to said displacement pickup for producing a first signal when said cutter drum has moved forwardly in an amount substantially equal to its length and for thereafter producing a second signal when the cutter drum is moved backwardly in an amount equal to a fraction of its length.
2 Assignments
0 Petitions
Accused Products
Abstract
A control for a mining machine having means for traversing a ground surface and a universally-pivotal carrier arm of variable length which carries at its forward end a cutter drum. A displacement pickup is responsive to forward or aft movement of the cutter drum with respect to the ground surface. Means are connected to the displacement pickup for producing a first signal when said cutter drum has moved forwardly in an amount substantially equal to its length and for thereafter producing a second signal when the cutter drum is moved backwardly in an amount equal to a fraction of its length. These signals are used to control forward or aft movement of the mining machine over the ground surface, or extension or retraction of the variable length carrier arm, to remove ribs in the side walls after a cut has been taken from the mine face area, these ribs resulting from the shape of the cutter drum and its angularity with respect to the mine roadway side walls.
9 Citations
8 Claims
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1. In a mining machine having means for traversing a ground surface and a universally-pivotal carrier arm of variable length which carries at its forward end a cutter drum rotatable about the axis of the carrier arm;
- the improvement in said mining machine which comprises;
a displacement pickup responsive to forward and aft movement of the cutter drum with respect to said ground surface, and means connected to said displacement pickup for producing a first signal when said cutter drum has moved forwardly in an amount substantially equal to its length and for thereafter producing a second signal when the cutter drum is moved backwardly in an amount equal to a fraction of its length. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- the improvement in said mining machine which comprises;
Specification