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 580
The cap will remain inthe hole through the yoke when the rod is takenout. In Fig. 92 an interior view of the Thomson-Houstonarc lamp is shown. This lamp is also used on con-stant current systems. The lamps should be hung from the hanger boardsprovided with each lamp, or from suitable supports… … figure 92. When the lamps are hung where the}/ are exposed tothe weather, they should be covered with a metalhood, to prevent injury from rain and snow. 162 ELECTRICITY FOR ENGINEERS In such cases, care should be taken that the circuitwires do not form a contact on the metal hood andshort circuit…
