. American engineer and railroad journal . Fig. 3.—General Arrangement of Apparatus. it are marked, in addition to tlie curve showing the pull onthe draw-bar. tlie location of mile posts and stations, and alsotime. The mile post pen. which is controlled by electro-mag-nets, draws a continuous line and at mile posts and stationsis drawn slightly aside by these magnets, which are oper-ated from a push-button touched by the observer in the look-out. The pen recording time is similarly made and Is auto-. Dynamometer Cylinders. matically controlled by a clock which makes electric contactsevery five
. American engineer and railroad journal . Fig. 3.—General Arrangement of Apparatus. it are marked, in addition to tlie curve showing the pull onthe draw-bar. tlie location of mile posts and stations, and alsotime. The mile post pen. which is controlled by electro-mag-nets, draws a continuous line and at mile posts and stationsis drawn slightly aside by these magnets, which are oper-ated from a push-button touched by the observer in the look-out. The pen recording time is similarly made and Is auto-. Dynamometer Cylinders. matically controlled by a clock which makes electric contactsevery five or ten seconds as desired. A speed record is alsoobtained upon a separate chart in the speed recorder shownat the right. * The oil pump receives its supply from the oil supply tank,and by properly arranged piping forces it into the three cyl-inders of the dynamometer. Compressed air, taken from reservoir of the air-brake sys-tem, is used to clear the oil from the cyl-inders when necessary, and also to aid infilling them and to blow oacK from theleakage tank whatever oil leaks by thepistons and stuffing-boxes of the threecylinders. From the switchboard electric connec-tions are made to the various signals andpens, to the revolution counter in the carwhich shows therevolution of thedriving wheelsand also to theelectric signalsfor indicatorcards at the frontend of the en-gine. The dynamo-meter cylindersare shown in They are madein three castingsheld together bystud bolts, n
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
