. The Street railway journal . rete. A steam-driven concretemixer was set up in the budd-ing, the composition used beingone part best American Portlandcement, three of crushed rockand five parts sand. The main units are two Mc-Intosh-Seymour cross-compoundcondensing engines, cylinders26-in. and 52-in. x 48-in. stroke,direct connected to 1000-kw re-volving-field type General Elec-tric a. c. generators, supplying25-cycle 380-volt current andhaving an output of 1562 amps,per terminal at 94 r. p. m. Theengines have water-jacketed bearings and pressure auto-matic lubricating system. They have a lar
. The Street railway journal . rete. A steam-driven concretemixer was set up in the budd-ing, the composition used beingone part best American Portlandcement, three of crushed rockand five parts sand. The main units are two Mc-Intosh-Seymour cross-compoundcondensing engines, cylinders26-in. and 52-in. x 48-in. stroke,direct connected to 1000-kw re-volving-field type General Elec-tric a. c. generators, supplying25-cycle 380-volt current andhaving an output of 1562 amps,per terminal at 94 r. p. m. Theengines have water-jacketed bearings and pressure auto-matic lubricating system. They have a large overload factor,and with a normal temperature of 35 degs., they are guaran-teed to run with 50 per cent overload for four hours with a10-deg. rise in temperature. They have heavy duty frames andtail rods on both high and low-pressure cylinders. They arepacked with Cooks metallic packing, 110 hemp being main engine shafts are 24 ins. in diameter, and on eachshaft is a 100,000-lb. 18-ft. fly-wheel. Each engine has an. August 12, 1905.] STREET RAILWAY JOURNAL. 237 electrical governor acting on the throttle for synchronizing;also an auxiliary safety stop operating at 105 r. p. m. Thereis space in the engine room for a third unit of the same size,and the auxiliary equipment is designed for the extension. Be-tween and below each pair of high and low-pressure cylindersis a Stratton receiver and separator. Each engine has aWorthington surface condenser, having 3200 sq. ft. of condensing systems are kept separate, so as not to compli-cate the piping, and, as all the auxiliaries are in duplicate, thiswas deemed more desirable than having the condensing sys-tems interconnected. Adjoining each condenser on a pedestalis a vertical Worthington Edwards type, triplex suction, valve-less air pump, gear-driven by a 20-hp induction motor. Cir-culating and feed-water are obtained through an 18-in. line,2000 ft. long, extending the full length of the house and lead-ing from
Size: 1286px × 1944px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectstreetr, bookyear1884
