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 372
going. The signal system is planned toindicate these two items. When there is no car in the block there isno light in either signal box and the semaphore disks are down.When a car enters the block a white light and a white disk are dis-played at the entering end and a red light and a red disk at… … Box Showing Operating Mechanism 327 230 ELECTRIC RAILWAYS the presence of one or more cars in the block and moving in thesame direction as the entering car, the motorman looks for a blinkingof the white light as he passes the signal box. This indicates that Fig. 218. Block Switch Showing Side…
Electrical engineering
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