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Updated: May 28, 2025
Several other important patents have been issued to Edison for crushing and grinding rolls, some of them being for elaborations and improvements of those above described but all covering methods of greater economy and effectiveness in rock-grinding. Edison's work on conveyors during the period of his ore-concentrating labors was distinctively original, ingenious and far in advance of the times.
The terminal was the scene of unwonted activity. The conveyors were disgorging crowds of Earthmen, grim, determined-looking individuals. They scattered purposefully through the various exits of the huge building. Hilary noted with interest that there were no women, no children, on the constantly incoming expresses. The Mercutians were massing, too. The terminal was crowded with guards.
Freight trains ran through arcades into the buildings to fetch and carry its products; great trucks, some gas driven, some with four-and six-horse teams, loaded sacks or containers that shot in endless streams through well worn chutes, or emptied raw materials that would shortly be breakfast foods into iron conveyors that sucked it up and whined for more.
The rock, broken up into pieces about the size of marbles, having been dried and conveyed to the stock-house, the surplusage was automatically carried out from the other end of the stock-house by conveyors, to pass through the next process, by which it was reduced to a powder.
These patents are between fifty and sixty in number, and include magnetic ore separators of ten distinct types; also breaking, crushing, and grinding rolls, conveyors, dust-proof bearings, screens, driers, mixers, bricking apparatus and machines, ovens, and processes of various kinds.
He knew where he was: in the wilderness of the Ramapos, some forty miles from New York. Sooner or later, he reasoned, he would strike one of the radiating conveyors that led into the metropolis, or a human being that would set him on the right track. A half hour's sturdy tramping brought him out of the tangled hills into civilization.
He was a little excited, for now there was to be no more delaying until the elevator should stand completed from the working floor to the top, one hundred and sixty feet above the ground; until engines, conveyors, and scales should be working smoothly and every bin filled with grain.
Up and down the aisles went the stock clerks; into the conveyors went the bundles, down the great spiral bundle chute, into the shipping room, out by mail, by express, by freight.
The crushed rock, being delivered at the top, would fall down from plate to plate, constantly exposing different surfaces to the heat, until it landed completely dried in the lower portion of the tower, where it fell into conveyors which took it up to the stock-house. This method of drying was original with Edison.
If it hasn't been discovered yet, it will be essential to our task. We'll have to get there quickly." "How?" Wat asked, "By the conveyors, of course." "No good," the little man declared. "Mercutian guards will be patrolling them. You have no identification tag. You would be caught." Hilary considered that. "Suppose you two go on along," he suggested. "Find it and wait for me. I'll manage somehow."
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