Elementary telegraphy : a manual for students; written specially to meet the requirements of the ordinary grade of the subject as published in the syllabus of the city and guilds of London Institute (1910)
Pendry, H. W. (Henry Walter) · London ; New York : Whittaker & Co. · leaf 67
r.O. Siiiiii.Icr, JO .-inil .Km. brass terminals on the base. The necessary adjust-ments are: Jlie axle of the lever carrying the armature 56 ELEMENTARY TELEGRAPHY should be just fiee to move in the hollowed ends of thescreAv pivots which limit the sideway movement. Thetransverse screw carried by… … Fig. 20.—S.C. Galvanometer. between the cores and the depressed armature with apiece of paper. All the adjustments are fixed with clamp-ing screws. The tension of the spring is best regulatedwith working signals, but with a very strong current it maybe^better to adjust the armature further from the…
Telegraph
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