[Electric engineering.] . e time a ready meansof adjusting the current- in case a few lamps happen toburn out. 66 ELECTRIC LIGHTING. 16 Fig. 40 shows the general appearance of one of these regu-lators. The regulating dial is seen in the center and is soarranged that when the wheel isturned, one arm moves in one direc-tion and the other arm in the oppo-site direction. The switch at thetop of the board serves to disconnectthe regulator from the circuit anddynamo. 75. Westinghouse Constant-Current Incandescent System.— The series-incandescent street-light-ing devices used by the WestinghouseCompa
[Electric engineering.] . e time a ready meansof adjusting the current- in case a few lamps happen toburn out. 66 ELECTRIC LIGHTING. 16 Fig. 40 shows the general appearance of one of these regu-lators. The regulating dial is seen in the center and is soarranged that when the wheel isturned, one arm moves in one direc-tion and the other arm in the oppo-site direction. The switch at thetop of the board serves to disconnectthe regulator from the circuit anddynamo. 75. Westinghouse Constant-Current Incandescent System.— The series-incandescent street-light-ing devices used by the WestinghouseCompany are considerably differentfrom the two previously described, inregard to the method of compensa-ting for burned-out lamps. Ordinary50-volt or 100-volt lamps are example, on a 1,000-volt cir-cuit, 20 50-volt or 10 100-volt lampswould be connected in series. Theseare preferable to the low-voltage20-volt lamps, because they are more efficient. Moreover,the ordinary 50-volt or 100-volt lamps are cheaper. The M M. Fig. 40.
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