Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 144
COKE-OVENS. 139 the mine by two jacks, out of which a sliding frame is advanced and withdrawn by means of ascrew feed-rod. Around the front of this sliding frame passes an endless chain provided withsteel cutters securelv fastened in its solid links, suitable gearing driving the chain around at … Kkj. 7.—Electric coal-mining machine. pro|)er speed. A steadying drill, provided with a long bearing directly back to the cutting-head, passes forward with the sliding frame, and prevents any thrust caused by the side-cuttingaction of the chain. The standard machine is made to undercut 3^ ft. in…
Mechanical engineering
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