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 86
tools, represented by reciprocatingmachine tools such as planers, presses, punches, slotters, shapers,gear and bolt cutters; and (2) adjustable-speed tools, such as lathes,and boring, drilling, and milling machines. Direct-current motors may be used for either constant- oradjustable-speed service,… … Fig. 2. Westinghouse Motor Driving Hilles & Jones Heavy Punch and Shear
Electrical engineering
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