. Electrical world. linder end. They open at both ends of the cylinder,and both cylinder heads are grooved to allow the entrance of steamat both ends of the valves simultaneously and between the slottedhub and the valves as w-ell as into the cylinder. This method of porting insures a non-broken surface of the in-terior of the cylinder both while machining it and for the valves totravel over when in actual operation. The exhaust is of large areaand free, the mere passing of the valves by the port grooves in theheads effecting a cut-off of steam between consecutive valves andresulting in a usefu
. Electrical world. linder end. They open at both ends of the cylinder,and both cylinder heads are grooved to allow the entrance of steamat both ends of the valves simultaneously and between the slottedhub and the valves as w-ell as into the cylinder. This method of porting insures a non-broken surface of the in-terior of the cylinder both while machining it and for the valves totravel over when in actual operation. The exhaust is of large areaand free, the mere passing of the valves by the port grooves in theheads effecting a cut-off of steam between consecutive valves andresulting in a useful expansion of the steam which in the engineillustrated corresponds to about one-half cut-off. Endurance tests have shown, it is claimed, that the engine willstand up and maintain good working conditions under shocks andstrains that would instantly wreck a reciprocating engine or othermotor of less rugged and enduring qualities. Below are the data ofa test made at the shops of the New York Central & Hudson River. FIG. 3.—TWO VIEWS OF COOLEY ENGINE. Railroad Company at West Albany: Duration of run, 7^ hours;boiler pressure gauge average, ; average , 1,249; total con-densed water, 1,358 pounds; developed horse-power, ; length ofbrake arm, $% ft.; mechanical efficiency, 91 per cent. The trial consisted of nine separate runs of one-half hour each,readings being taken every five minutes during each run. The ex- haust steam was condensed in a surface condenser, the condens-ing water caught and weighed after each run. A separator wasused to dry the steam, with a throttling calorimeter to detect themoisture present. Readings of the thermometer on this were takenevery minute throughout the runs. The developed horse-power wasmeasured by a Prony brake. The first run was made with no loadto determine friction and thereafter a load increasing by one poundeach run was put on. Willard Storage Battery for Automobiles. The accompanying illustrations. Figs. I and 2, show in deta
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectelectri, bookyear1883
