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 876
h one wire of the circuit is connected. Theshaft is provided witli an arm, the end of which carries a brush which sweeps in contact withthe face of a metallic disk, to which the other wire of the circuit is connected. The faceof the disk over which the brush sweeps is provided with insulating…
Mechanical engineering
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