. The street railway review . built up a coreof soft steel punchings, forming a complete laminated field. Thepunchings are dovetailed into the frame and clamped between endrings of cast steel. The field coils are wound with copper strapinsulated between turns and about the coils by mica and finishedby taping and dipping, and are impregnated with the best grade ofvarnishes, providing a sealed coil which can withstand the mostsevere internal heat and is practically indestructible under the usualconditions of heavy railway service In addition to the main coils the field carries a neutralizing win
. The street railway review . built up a coreof soft steel punchings, forming a complete laminated field. Thepunchings are dovetailed into the frame and clamped between endrings of cast steel. The field coils are wound with copper strapinsulated between turns and about the coils by mica and finishedby taping and dipping, and are impregnated with the best grade ofvarnishes, providing a sealed coil which can withstand the mostsevere internal heat and is practically indestructible under the usualconditions of heavy railway service In addition to the main coils the field carries a neutralizing wind-ing which consists of copper bars placed in the slots in the polefaces and joined at the ends by connectors of copper strap, so as toform one continuous winding which is connected in series with themain field winding and with the armature circuit. The magnetizingeffect of this auxiliary winding is directly opposite to and neutralizesthat of the armature winding, thus eliminating the effect of armature ■.■fflB- i~~*TlBCL. MAP AND PROFILE OF ST. CLAIR TUNNEL WHICH IS TO BE ELECTRICALLY EQUIPPED. all, 9 ft. 6 in.; height from top of rail to top of cab, 12 ft. 6 in.;diameter of driving wheels, 62 in. The operating apparatus will be arranged along the sides of thecab, leaving a free passage-way 3 ft. 6 in. wide the entire cab will be lighted and heated by electricity, arrangement beingmade to screen the instrument lights while the locomotive is run-ning. Combination automatic and straight air and American driverbrakes will be used. The air supply will be provided by a two-cylinder motor-driven air compressor having, with a 5-in. strokeand speed of 190 r. p. m., a capacity of 45 cu. ft. of air per reservoirs, signal outfits, whistle, bell with pneumatic ringers,automatic pump governor, tools, instruments, gages, headlights,push poles and other details complete the auxiliary equipment. A motor will lie geared to each axle, giving each unit an aggre-gate rat
Size: 3302px × 757px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookcentury1800, bookdecade1890, booksubjectstreetrailroads
