Determination of current and candle power curves of the alternating current arc under impressed voltage of various wave forms . along the axis of this shaft. Thisdoes not interfere with the end play of the rotary arma-ture. The Motive Pov/er. The power required to rotate the flicker photom-eter discs as described above, is furnished by a 5 E.^.wood rotary converter, shown in Print 7 at b. This ro-tary has a capacity of 36 amperes at 140 volts at thedirect current end, and 85 volts at the alternating currentend. It is a six pole machine and its armature is woundfor one, two, three or six phases
Determination of current and candle power curves of the alternating current arc under impressed voltage of various wave forms . along the axis of this shaft. Thisdoes not interfere with the end play of the rotary arma-ture. The Motive Pov/er. The power required to rotate the flicker photom-eter discs as described above, is furnished by a 5 E.^.wood rotary converter, shown in Print 7 at b. This ro-tary has a capacity of 36 amperes at 140 volts at thedirect current end, and 85 volts at the alternating currentend. It is a six pole machine and its armature is woundfor one, two, three or six phases. In this work, therotary is operated as a single phase synchronous motor bythe machine furnishing the power to the arc. The synchro-nizing is arranged for by the lamps, c, in series with oneside of the line controlled by switch, d. The directcurrent side of the rotary is connected through the start-ing box, e, and has an auxiliary rheostat, and single poleswitch, h, in the armature circuit, jx rheostat, f, is alsoused in the rotary field circuit. By using a rotary inthis position, a convenient method for synchronizing is. PRiifr afforded, by getting synohronous speed as a direct currentmotor. The Curve Tracing Tatle. To obtain the instantaneous values of the voltageimpressed upon the arc, the method used consists of balanc-ing these instantaneous values by the direct current volt-age of the storage batteries. To obtain the instantaneousvalues of the current through the arc, a known resistanceis inserted in series with it and the drop over this re-sistance balanced, as in obtaining the instantaneousvalues of the voltage against the voltage of the storagebatteries. Since this kiiovm resistance is non-inductive,the current is then easily calculated by Ohns law, foreach value of the drop obtained. The connections of the curve tracing table areshown on Print 8. The leads from the storage batteriesare brought to the binding posts, a, which are connectedto one side of the potential r
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Keywords: ., bookcentury1900, bookdecade1900, bookiddeterminatio, bookyear1905
