. The Street railway journal . two long spiral snrings at each end, is claimed to givea much easier riding car than the old form of bolster used in wheels, and can be easily adjusted to the wheels without ])lacingtruck over a spit. This truck is constructed of three different weights to meetdifferent conditions of service—light weight with 33-in. spokewheels and 5-in. axles, 7250 lbs.; medium, with 33-in. double-platewheels, 6-in. axles, 8600 lbs.; with 36-in. double-plate wheels and7-in. axles, 10,350 lbs. each. Triplex Pumps Triplex pumps are coming into extensive use in connection withelect
. The Street railway journal . two long spiral snrings at each end, is claimed to givea much easier riding car than the old form of bolster used in wheels, and can be easily adjusted to the wheels without ])lacingtruck over a spit. This truck is constructed of three different weights to meetdifferent conditions of service—light weight with 33-in. spokewheels and 5-in. axles, 7250 lbs.; medium, with 33-in. double-platewheels, 6-in. axles, 8600 lbs.; with 36-in. double-plate wheels and7-in. axles, 10,350 lbs. each. Triplex Pumps Triplex pumps are coming into extensive use in connection withelectric motors in power plants and in many other places ownedby street railway companies. The Deming Company, of Salem,Ohio, has been introducing recently a triplex design of is hardly necessary to state that in the interests of economyand the motive power the triplex form is desirable rather than onehaving fewer cylinders. Shocks to the piping system and themotor driving the pump are less the more cylinders there are on. ELECTRICALLY-DRIVEN PUMP the pump, .\part from the principles involved in moving the waterthe mechanism of the jnunp plays an important part in theeconomy of operation. Friction is the chief foe to contend making all castings of ample weight the Deming Companysecures the rigidity of parts necessary to small friction loss. ADeming electrically-driven triplex pump is illustrated pumps are well adapted to power house and car houseservice as boiler feeders, tank supply pumps, and hyilraulic pres-sure pumps, as well as to the uses of street railway ])leasure re-sorts, situated at a distance from cily water ni- reipiiring murewater than can be econonucally purchased from a city siip[ily. 5o6 STREET RAILWAY JOURNAL. [Vol. XVIII. No. 14. Some British Tramway Motors It is (Illy about two \-ears ago that tlic plans of the EnglishElectric Manufacturing Company for the construction of largeworks at Preston for the manufacture of elect
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Keywords: ., bookcentury1800, bookdecade1880, bookidstreetrailwa, bookyear1884
