. Electric railways, theoretically and practically treated . ds to a force of 20 lbs. per ton aspreviously explained. This force applied to the movingweight will tend to produce an effect corresponding to theequivalent acceleration. The motion of the moving elementis impeded by a very carefully constructed dash-pot result-ing in a constant deflection for a given acceleration. Thisinstrument has been tested on the Manhattan L, N. Y.,and the curve inserted (Fig. 24) was obtained from theobserved values of acceleration. s 3F 1 D AVENUE 1 1ELEVATED R. F . \ \ 23RD ST. TO 2 3TH ST. \ s. <l N s I
. Electric railways, theoretically and practically treated . ds to a force of 20 lbs. per ton aspreviously explained. This force applied to the movingweight will tend to produce an effect corresponding to theequivalent acceleration. The motion of the moving elementis impeded by a very carefully constructed dash-pot result-ing in a constant deflection for a given acceleration. Thisinstrument has been tested on the Manhattan L, N. Y.,and the curve inserted (Fig. 24) was obtained from theobserved values of acceleration. s 3F 1 D AVENUE 1 1ELEVATED R. F . \ \ 23RD ST. TO 2 3TH ST. \ s. <l N s I \ - !f s \ Sf \ u d 1 IMEI N SEC ;ONC s \ T Fig. 24. —TEST CURVE OBTAINED WITH ACCELEROMETER. G. E. Recording Ammeter. — This recording ammeterwas described by Mr. A. H. Armstrong in a paper pre-sented at the 180th meeting of the American Institute ofElectrical Engineers. In brief, it is constructed upon thedynamometer principle, consisting of two coils, one fixed,the other stationary. The inner, or movable coil, surrounds RECORDING INSTRUMENTS. 55 u^. Fig. 25a.— RECORDING AMMETER.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyorkvannostrand
