Electricity experimentally and practically applied; a book for the beginner and for the practical man, principles, experiments, practical applications and problems (1910)
Ashe, Sydney Whitmore · New York, D. Van Nostrand company · leaf 248
Fig. 290.—Type C, T. R. W. Fig. 292. — Spring Brushes,T. R. W. … 226 EXPERIMENTAL ELECTRICITY removable from the front instead of from above, as withthe old T. R. W., Fig. 293, the meters may be placed insmall places. The wires enter fromeach side instead of from the bottomand are protected at their inlet pointswith pieces of felt to prevent dust fromentering…
Electricity · Electrical engineering
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