Modern instruments and methods of calculation : a handbook of the Napier Tercentenary Exhibition (1914)
Horsburg, E. M. (Ellice Martin), Napier Tercentenary Exhibition (1914 : Edinburgh, Scotalnd) · London : G. Bell · leaf 136
hich may in turn be engaged with kz, and on itsleft end a gear wheel which drives the shaft z#4 higher up (fig. 47). Withchosen adjustments of all these wheels, wx makes with one crank turn arevolution (direct or reverse, according as the wheel &4 or kb is engaged).The reversing takes place by… … Fig. 47.—(f actual size.) Quotient mechanism. other. A spring causes the reversing lever to spring easily into its endposition, so that it is held firmly there. Similar precautions are taken as inthe case of the lever U to prevent turning of the mechanism when the settingup is incorrect. Reversal…
