. The Street railway journal . latform space, removal of working currents from theplatform, adaptation to light multiple-unit service, simpler carwiring and reduction in cables, elimination of grounded con-troller frames and automatic acceleration. The German patentson this system are owned by the Allgemeine Elektricitats Gesellschaft. ♦-♦* President Rhodes, of the City & County Contract Company,of New York, which is building the New York, Westchester& Boston Railway, is to let contracts for sixteen steel bridges. 1030 STREET RAILWAY JOURNAL. [Vol. XXVI. No. 24. IMPROVED SELECTIVE SIGNALING SY
. The Street railway journal . latform space, removal of working currents from theplatform, adaptation to light multiple-unit service, simpler carwiring and reduction in cables, elimination of grounded con-troller frames and automatic acceleration. The German patentson this system are owned by the Allgemeine Elektricitats Gesellschaft. ♦-♦* President Rhodes, of the City & County Contract Company,of New York, which is building the New York, Westchester& Boston Railway, is to let contracts for sixteen steel bridges. 1030 STREET RAILWAY JOURNAL. [Vol. XXVI. No. 24. IMPROVED SELECTIVE SIGNALING SYSTEM The despatchers selective semaphore signal system used bythe Boston & Worcester Street Railway and manufactured bythe Blake Signal & Manufacturing Company, of Boston, hasbeen improved in several particulars since its first descriptionin the Street Railway Journal of June 4, 1904. It may beremembered that this system makes it possible for the de-spatcher to summon quickly the crew of any car which is on. FIG. 1.—DESPATCHERS SIGNALING DESK the road by a system or selective signals actuated from aspecial desk in his office. For the despatchers office equipment, instead of using aconstant-speed motor driving a shaft on which different tootheddiscs were placed, which opened and closed the circuit andsent impulses over the line for actuating the various signals,a desk-like box (Fig. 1) containing fifteen pendulums of dif-ferent lengths is now used. Each of these pendulumscorresponds in length to a pendulum in one of the linesignals, and is latched back out of the perpendicularposition. When the despatcher wishes to set, say, signal, he inserts a plug similar to that of a telephoneinto No. 9 hole. This releases the No. 9 pendulum, andalso connects the line with the 500-volt current whichis brought to the despatchers desk. As the pendulumswings, it opens and closes the signal line circuit, send-ing impulses over the line, synchronous with its vibra-tion. These impulses
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
