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Show TO MINE BY ELECTRICITr. A Successful Electric Mining Machine Invented In-vented at Last. McKeesport, Pa., Times. The mining of coal by machinery has been a subject of experiment for a great many years. A number of machines have been tried, but for one reason or another have been cast aside as impracticable. imprac-ticable. Since electricity has developed several electrical machines have been invented and they, too, so far, have not been successful, until the Michales electrical mining machine was evolved. This invention originated with Capt. M. A. Michales of Pittsburg, and was perfected per-fected by him and his partner, Dr. O S. Weddell, of this city. The invention is covered by patents, has been tested successfully and is pronounced by all experts who have seen it at work lo be the long sought for machine. The machine is mounted on a two-wheeled two-wheeled truck, is nine feet in length, two and one-half in breadth, two and two-thirds in height and weighs about 800 pounds. It is mounted with a two-horse two-horse electric motor from which the power is transmitted to the working parts beneath. Extending from the front of the machine is the pick which does tho coal digging. The mechanism throws this pick back and forth horizontally hori-zontally and by pushing the truck close enough to the wall of coal the pick eats its way into the coal as a miner undermines under-mines and shears the ends with a hand pick, and the coal is thrown down. The machine strikes 120 blows a minute min-ute with a force of 9,000 pounds to the blow. The current to operate the machine ma-chine is carried to it by wires attached to the roof or sides of the mine and the latter can by this same means be lighted by incandescent lamps. It requires ono man and a helper to operate the machine. It will undercut 4 feet aud take out the bench across a 27 foot room in two hours throwing down between ten and fifteen tons of coal. The machine is in operation at the Essen mine near Mansfield now, and it has been in practical operation for the last six months. The owners are about to form a stock company capitalized at $500,000 to manufacture the machines for the market. Tho new machine is expected: to revolutionize the business of eoal mining. |