000 02209 a2200181 4500
999 _c34204
_d34204
020 _a9781528464482
082 _a652.37 SC AU
100 _aScott, Ralph
_919253
245 _aAutomatic block signals and signal circuits :
_bAmerican practice in the installation and maintenance of signals electrically controlled and operated by electric or other power
_cRalph Scott
260 _aLondon :
_bForgotten Books,
_cc2017.
300 _aiv, 243 p. :
_bill. ;
_c25 cm.
520 _aExcerpt from Automatic Block Signals and Signal Circuits: American Practice in the Installation and Maintenance of Signals Electrically Controlled, and Operated by Electric or Other Power All-electric interlocking, a natural development of the older mechanical and electro-pneumatic interlocking, is given the attention that its importance merits. Electric railway signals are described as fully as seems advisable, since they are in a transitory state of rapid progress. Electro-gas and three-posi tion signals, representing the highest development of the art in America, have been treated not only from an electrical stand point, but also from a structural point of view. This book is intended for the signal and railway engineer, the electrician, and the layman; and it is modestly hoped that it Will appeal to all in any way concerned With signaling. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
650 _aSignals
_919254
650 _aSignal Circuits
_919255
856 _uhttps://uowd.box.com/s/afezpbnr4ti32pyi9u57kxzce241k1k9
_zLocation Map