American telegraphy and encyclopedia of the telegraph; systems, apparatus, operation (1909)
Maver, William, jr. [from old catalog] · New York, Maver publishing company · leaf 628
M. The left end of sleeve c is bevelled, as shown, and on this beveled edge 25 hori-zontal, short, equal divisions are cut. r and e are extensions of the U-shaped metal piece p. A hole having a thread suitable forthe screw s, runs lengthwise through eand e. a number of vertical divisions arecut, as… … FIG. 386. I fc^.<^*--,^-—-^ rrrrrlk ^ ^. —H>:
Telegraph
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