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 239
Fig. 104. Trolley Harp for Holding Pulley 205 no ELECTRIC RAILWAYS Harp. The trolley harj) is the device which is mounted on theupper end of the i)ole to carry the trolley wheel. A typical harp is
Electrical engineering
Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.
