Raymond, William Galt, 1859-1926, Raymond, William Galt, 1859-1926. cre · New York, J. Wiley & sons, inc · leaf 154
r space, are particularly suitable for a tall cabin. 128 SIGNALING Power Interlocking Machines. — When a large yard is to beinterlocked, manual interlocking becomes too slow and requiresa large number of men. Power interlocking has been devised toovercome these difficulties. Power machines are of… … Fig. 73 Lever Vertical Locking Machine to the sleepers or signal posts, the valves for these cylinders beingcontrolled by electromagnets actuated by a current of electricitycontrolled by the interlocked levers — electric switches — in thesignal cabin. In the second type, air at a pressure of about…
Railroad engineering
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