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 139
got. As it is not desirable inevery kind of calculation to have the carriage automatically displaced, a contrivance for longitudinal displacement of z3 is provided, which causes the 8 ii4 SECTION D roller vx to face the openings, thereby preventing the lateral motion of the rackhaving any action on… … Fig. 49.—(f actual size.) Displacement of carriage (side view). during a calculation, and also to prevent turning the crank in an incorrectposition of the carriage, there is attached to the frame of the slot mechanism,underneath the crank axle, a lever hs (fig. 43). A roller at one end of it…
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