. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . its by installing one ontheir own system. It has been located onthe westbound mainline just outside Pad-dington Station—the London terminal ofthe Great Western line. The signal mechanism has been designedin America by the Union Switch andSignal Co., of Swissvale, Pa., and suppliedin conjunction with the McKenzie, Hol-land and Westinghouse .Co., of London,who must be regarded as the pioneers inthis branch of signaling in England. When in a horizontal position the armof the signal displays a re
. Railway and locomotive engineering : a practical journal of railway motive power and rolling stock . its by installing one ontheir own system. It has been located onthe westbound mainline just outside Pad-dington Station—the London terminal ofthe Great Western line. The signal mechanism has been designedin America by the Union Switch andSignal Co., of Swissvale, Pa., and suppliedin conjunction with the McKenzie, Hol-land and Westinghouse .Co., of London,who must be regarded as the pioneers inthis branch of signaling in England. When in a horizontal position the armof the signal displays a red light, indicat-ing stop. In the second position—anangle of 45 degrees—it exhibits a yellowlight, signifying proceed with caution,prepared to stop at next signal. Thethird position, exhibiting a green light,indicates to the engineer that he mayproceed, and the signals at the next boxare safe. The mechanism is erected on a tubulariron post with a concrete base—Unionstyle T-2—designed for 10-volt direct cur-rent operation. The operating mechanismconsists of a 4-pole electric motor driving. STOP SIGNAL. a train of gears, with ratio 120 to 1, anda circuit controller for retaining the sig-nal arm in caution or proceed mechanism is worked by three-voltaccumulators. The Britishers have been long in recog-nizing the true value of the three-positionupper quadrant electric signal, and theintroduction of these from this countrymay cause a vast improvement over thelower quadrant signals hitherto univer-sally used in England. The Light of Other J. E. Alger, Reading, every number of your valuablejournal is very interesting, an occasionalarticle appears that takes me back to thelight of other days. I began railroadingin 1868, and I am at it yet. Your recentarticle on Soft Hammers was a cracker,and brought back the methods in vogue
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