The Street railway journal (1902) (14574151348)

Identifier: streetrailwayjo201902newy (find matches)
Title: The Street railway journal
Year: 1884 (1880s)
Authors:
Subjects: Street-railroads Electric railroads Transportation
Publisher: New York : McGraw Pub. Co.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries



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The R. D. Nuttall Company report unusual activity in thetrading of trolley wheels, many roads availing themselvesof the opportunity offered to replace old types or worn-out trol-leys with the latest forms, the old trolleys being accepted in partpayment on the new. The most notable case is that of the Cin-cinnati Traction Company, which traded 700 of its old-formdouble trolleys not long ago for 1400 of the single type. Individ-ual roads all over the country are taking advantage of the oppor-tunity to re-equip their systems with more modern apparatus ofthis kind. 62 STREET RAILWAY JOURNAL. (Vol. XX. No. f: Siemens Multipolar Dynamos The generators shown in the accompanying illustration havebeen made by Siemens Brothers & Company, Limited, of Wool-wich, England, for the Corporation of Oldham. These machinesare compound wound and are arranged to be driven by Willans
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SIEMENS DYNAMOS COUPLED FOR TESTING central valve engines, running at a speed of 300 revolutions perminute. The capacity is 500 kw each. The field magnets consist of a ring of special quality cast iron,made in two parts and strongly bolted together, carrying eight polesof laminated steel. The core of the armature consists of discs ofannealed mild steel accurately stamped and keyed to a castiron body. The core is slotted and the bars securely held in theslots by means of hornbeam strips. The strips can be readilywithdrawn to allow a coil to be replaced in the event of injury. The commutator is built up of hard drawn copper segments, and Losses and Efficiency of8 Pole 500 K.W. Compound-Wound Siemens Generator 100? 98 J96 E94 J92 g90 £ Cum C 2 li ! R C2 1 fill Iron 1ms Frk Ampe 1000 1-200Street Kaitwat/Jsu EFFICIENCY CURVES OF SIEMENS DYNAMOS is insulated throughout with mica. The brush gear is mounted ona cast-iron ring, which is fixed concentrically with the armature,and which can be