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 110
Fig. 16. Fig. 17. Fig. 18. Fig. 19. The pin wheels shown in fig. 13, whose adjustable pins m (figs. 17 and 18)are set by the lever h, are mounted on a common shaft worked by a crank.There are nine pins which can be made to project from the pin wheel asrequired, and when the crank is turned to…
