. The Street railway journal . COxMBJNATION PASSENGER AND BAGGAGE CAR FUR THE ?I.\GEKST(;\VX& NORTHERN RAILWAY which consists of a motor and air pump enclosed in a dust-and-waterproof casing. The motor is a series-wound conse-quent-pole machine, being of ample size and capacity to with-stand overloads and hard service. The armature is built of Swedish charcoal-iron laminationsassembled on a steel shaft. The armature coils are insulatedwith the best material procurable for the purpose. The com-mutator is built of drop-forged copper bars, insulated withIndia mica and assembled on a brass shell.
. The Street railway journal . COxMBJNATION PASSENGER AND BAGGAGE CAR FUR THE ?I.\GEKST(;\VX& NORTHERN RAILWAY which consists of a motor and air pump enclosed in a dust-and-waterproof casing. The motor is a series-wound conse-quent-pole machine, being of ample size and capacity to with-stand overloads and hard service. The armature is built of Swedish charcoal-iron laminationsassembled on a steel shaft. The armature coils are insulatedwith the best material procurable for the purpose. The com-mutator is built of drop-forged copper bars, insulated withIndia mica and assembled on a brass shell. It is made of July 21, 1906.] STREET RAILWAY JOURNAL. 113 ample size to withstand mechanical strain and wear. Thefields are constructed in such a manner that there are nounnecessary cross-connecting wires in the motor, the termi-nals going direct to the brush holders and trolley and cylinder walls, the weight of the pistons being balancedagainst each other, and the wear being distributed evenlyaround the cylinders, thus preventing them wearing ellip-tically. The valves are placed in the head in such a way thatthe amount of air cushioned or pocketed is at a minimum,thus avoiding considerable loss by the expansion of this airon the return stroke. The suction and discharge valves arearranged on the cylinder head so as to be accessible for in-spection or regrinding, and are interchangeable. By the use of the Hmdley worm and wheel transmission thecompany says it has accomplished results in economy and lifethat can not be equaled by any other system of transmission. It is recommended that the motor be placed under the car,and as no boxing is necessary, the whole makes a very neatappearance. -*^^ A NOVEL TRANSFER FIG. 2.—MOTOR DISSEMBLED On the end of the armature shaft is screwed a clutch whichengages with a mate on theworm pinion; by this method anarmature can be re
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
