. The Street railway journal . oller. Bythe successive operation of the different contactors the resistanceunits are cut out until the motors are in full series; then themultiple connection is made and the resistance units again cut outuntil the motors are in full multiple. The original type of GeneralElectric Control was adopted for the 800 motor cars of the Man-hattan Elevated Railway, in New York, and put into operation in1902. The control equipment supplied on this road does not in-clude the current limiting relay, which accomplishes automaticacceleration, but this feature was included on
. The Street railway journal . oller. Bythe successive operation of the different contactors the resistanceunits are cut out until the motors are in full series; then themultiple connection is made and the resistance units again cut outuntil the motors are in full multiple. The original type of GeneralElectric Control was adopted for the 800 motor cars of the Man-hattan Elevated Railway, in New York, and put into operation in1902. The control equipment supplied on this road does not in-clude the current limiting relay, which accomplishes automaticacceleration, but this feature was included on the 430 motor carsof the Interborough Rapid Transit Subway, which were put intooperation in New York in 1904. There are at present on the market two types of multiple-controlapparatus, known respectively as the Sprague-General Electric Con-trol and the Westinghouse Electric Pneumatic Control. By thecombination of the Sprague and General Electric Companies, thebest features of the apparatus of both systems are brought SPRAGUE-GENERAL ELECTRIC CONTRACTOR D. The contactors of the General Electric Company have provedgreatly superior to the drum type of controller, and the Sprague-General Electric system now has the General Electric type of con-tactor switch and receiver, and the Sprague current limit relay andmaster controller. The Westinghouse Company has also adopted in its presentelectro-pneumatic control a unit switch, or contactor, in placeof the original drum controller, and this switch is operated bymeans of an air cylinder with electrically-controlled valves. It is September 30, 1905.] STREET RAILWAY JOURNAL. 567 worthy of note that while the design of the mechanism has heenradically changed and materially improved, the fundamental prin-ciples of operation, defined by Mr. Sprague and incorporated in hisoriginal apparatus, have finally been adopted almost unchanged byall manufacturers of control apparatus to-day. As a practical uni-formity of results is o
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
