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ICS Automatic Train Control By Thomas Langman #2508 Edition 1 1937 edition 92 pg
ICS Automatic Train Control By Thomas Langman #2508 Edition 1 1937 edition 92 pages includes examination questions. Prepared especially for home study International Correspondence Schools. Illustrated International Textbook Company
Purpose of Automatic Train Control.-The purpose of automatic train control is to control automatically the movement of a train in the event of inability or failure of the engineer to obey the signals. The control of the train is left entirely with the engineer as long as he obeys the requirements of the signal indications ; when he fails to do so, the automatic train control operates and brings the train to a stop. With train control, it is therefore possible to increase the safe running speed of trains and also to decrease the clearance between trains.
Electric and Pneumatic Equipment.-The automatic train-control apparatus comprises two sets of equipment, the electric and the pneumatic. Under certain conditions the action of the electrical apparatus brings about the operation of the pneumatic apparatus, which then applies the brakes.
Explanation of Types.-Automatic train control falls into two general types ; namely, continuous and intermittent. The distinction between these two types of control can be understood from the following: Assume that a train moving in the direction of the arrow, Fig. 1, approaches a caution signal; this implies that another train is occupying block 2. As the train passes the caution signal, the cab signal changes from clear to caution.
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