Twentieth century hand-book for steam engineers and electricians, with questions and answers .. (1905)
Swingle, C. F. [from old catalog], Horstmann, Henry Charles, 1858- [from old catalog], Tousley, Victor Hugo, 1875- [from old catalog] · Chicago, F. J. Drake & co. · leaf 597
ecomes heated, the glowers, which areplaced directly below them, also heat up and in timetheir resistance becomes so reduced that current willpass through them. The current will now pass throughthe glowers to what is known as the ballast, 7. This177 178 ELECTRICITY FOR ENGINEERS ballast is composed… … FIGURE 99. down any fluctuations in the current strength. It willbe noticed that there is a separate ballast for eachglower. From the ballast the current flows around thecoil of wire 3. Inside of this coil is an iron core which ELECTRICITY FOR ENGINEERS 179 moves up and down, and connected to the…
