Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 214
7596. AMPEREMETER.—Simple formshowing the principle of operation. The at-traction of the electric current in the sole-noid coil, draws the iron core within thecoil against the gravity of the core andframe which swings on a frictionless bear-ing. … 759^. RECORDING WATT-HOUR METER.—The armature isrotated under the influence of thecurrent in the field coils. The arma-ture spindle drives the recordinggear and dial hands and is regulatedby the constant retarding influenceof a disk revolving on the same spin-dle between the poles of…
Mechanical movements
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