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 354
d of the tie outside the rails.) On the base is a block ofmoulded insulating material—in this case vitrified clay—on topof which is an iron clamp which holds the base of the rail firmly.The weight of the rail helps to hold it in position and the pressure ofthe contact shoe being downward, there is… … Fig. 202. Details of Insulator and Bracket for Inverted Rail Protection. The third rail is, in many cases, protected bywood coverings. These prevent accidental contact with the railsby human beings and lower animals, and also protect the rail fromshort-circuits with the track. The covering is…
Electrical engineering
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