Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise .. (1916)
Swingle, Calvin F. (Calvin Franklin), b. 1846 · Chicago, F.J. Drake & company · leaf 1340
an ampere meter. This is called Calibration. Ammeters and Voltmeters.—The ammeters and volt-meters of commercial work are all special adaptations ofthe DArsonval galvanometer or, for the least accurate worksuch as on switchboards; they are of the magnetic vane type. The Weston instruments are… … jsnmnm WMZL unmmm mmm* Fig. 609interior of weston instrument 1306 Steam Engineering the whole of the working part is built up on this mag-net independent of the case, so that the movement canbe removed bodily from the case by simply taking outone screw which holds the gun-metal casting in place.The…
