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 227
mutator by the spring, whose tension may be variedby means of the adjusting screw. Connection is made between thebrush and the stationary part of the holder by means of two setsof ro.cd-copper leaves which at the same time act as flexible joints. In Fig. 240 is shown a reaction type of…
Electrical engineering
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