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 238
easonably soft sothat in general they will bendrather than break under ordi-nary shocks. The tubes aretapered from a point severalfeet from the upper end and they have an outside diameter at the buttfrom If to 2 inches. The standard outside diameter at the upper endis 1 inch, the inside being… … 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
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