. Electric railway journal . ceswhich consist of a rotating vane immersed in a smallcup containing oil or some other viscous liquid. Theamount of damping is varied by adjusting the heightof the cup, the quantity of oil or the quality of theliquid. meters do not require damping as thearmature is wound on a metallic frame in which theeddy currents are induced when the armature rotatesin the magnetic field of the permanent magnet. The energy consumption of these instruments is solow that they may be operated from existing shunts ortransformers. V o 11-meters and wattmetersrequire from 4 watt
. Electric railway journal . ceswhich consist of a rotating vane immersed in a smallcup containing oil or some other viscous liquid. Theamount of damping is varied by adjusting the heightof the cup, the quantity of oil or the quality of theliquid. meters do not require damping as thearmature is wound on a metallic frame in which theeddy currents are induced when the armature rotatesin the magnetic field of the permanent magnet. The energy consumption of these instruments is solow that they may be operated from existing shunts ortransformers. V o 11-meters and wattmetersrequire from 4 watts to5 watts for each volt-age element on 110volts. ammetersconsisting of millivolt-meters and shunts re-quire only about 1/3amp for the instru-ment. Owing to thedirect- writing con-struction, no extra con-trol circuits of anysort whatever are used. These instrumentsare used on switchboards for obtaining voltage and out-put curves, for getting the energy consumption ofmachine tools and for general efficiency Switchboard Meter COASTING TIME RECORDERS FOR THIRD AVENUERAILWAY SYSTEM, NEW YORK The Third Avenue Railway System through Presi-dent F. W. Whitridge recently placed an order for1000 coasting time recorders and thirty-six terminalclocks for use on all the lines of this system. Thecompany operates under almost every kind of surfacerailway conditions, from the heavily blockaded streetsof Manhattan to long free-running stretches on manyof its suburban divisions. The order for the coastingclocks was placed after careful tests had shown thatthey would produce substantial savings under thisrange of operating conditions. The terminal runningtime clocks will be used to insure the correct registra-tion of running time from terminal to terminal and,if desired, also the running time to intermediate this way the reported proportion of coasting timeto running time will be absolutely correct, because therunning time will not depend upon guesses made by thecond
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkmcgrawhillp
