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 334
th galvanized iron straps which areplaced at an angle of about 45 degrees. The braces are attachedto the cross-arms by carriage bolts and to the poles by lag screws.The cross-arms are bored to receive locust pins or iron bolts, uponwhich are mounted the glass or porcelain insulators. The upper 292… … Fig. 172. Diagram of Construction of Single-Track Interurban Trolley Road Concrete poles are moulded in a taper form somewhat similarin shape to wooden poles but of nearly square cross-section. Thecorners are chamfered to prevent chipping and to facilitate mould- 293 196 ELECTRIC RAILWAYS
Electrical engineering
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