n. In transportation, a self-loading conveyer used to collect and transport coal from a coal-storage yard or pocket and to deliver it to railroad-cars or vessels or to place it in other near-by storage-places. In one form the conveyer is loaded by means of a self-filling bucket; in another a horizontal bucket-conveyer, supported by a swinging arm pivoted at one end, travels in a circle along the edge of a coal-heap, sweeping up and taking away the coal as fast as it slides down. See coal-storage.