Cyclopedia of applied electricity : a general reference work on direct-current generators and motors, storage batteries, electrochemistry, welding, electric wiring, meters, electric lighting, electric railways, power stations, switchboards, power transmission, alternating-current machinery, telegraphy, etc. (1916)
American Technical Society · Chicago : American Technical Society · leaf 123
Fig. 48. Partially Dismounted Rock Drill Showing Electrical Hammer Mechanism Courtesy of Fort Wayne Electric Works force and at each revolution strikes a blow upon the projecting headof the drill steel cap, which in turn delivers the energy of the blowto the drill steel. 105 … 106 MOTOR-DRIVEN MACHINERY 41 In Figs. 49 and 50 may be seen an electric mine locomotive ofGeneral Electric manufacture, the former portraying the locomotive,trolley, and tracks in the mine of the Consolidated Coal Companyof St. Louis, Missouri, while the latter shows the electric motorgeared to…
Electrical engineering
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