An elementary book on electricity and magnetism and their applications (1919)
Jackson, Dugald C. (Dugald Caleb), 1865-1951, Jackson, John Price, b. 1868, Black, Newton Henry, b. 1874 · New York, The Macmillian Co · leaf 191
e ammeters most commonly used onswitchboards and in the laboratory are merely a more or lessportable form of the dArsonval galvanometer. Instead ofsupporting the moving coil by a delicate suspension wire orribbon, it is mounted on pivots, which are as accurately fittedinto jeweled bearings as the… … Plan of Weston ammeter. Figure 99 shows a Weston ammeter with the moving coilmounted on pivots and arranged with a pointer to play overa scale; and the whole is arranged in a very convenient, port-able form in a self-contained case (not shown in the figure). ELECTRICAL MEASURING INSTRUMENTS 163 A…
Electricity · Magnetism
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten20unit-871-396.webp)
