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
the frame of the slot mechanism,underneath the crank axle, a lever hs (fig. 43). A roller at one end of it ispressed by a spring against a disc p^ on the crank axle, and springs into anotch of pi in the normal position of the crank. The other end of this leveris fitted with a projecting piece,… … Fig. 50.—(f actual size.) Last carriage axle with fittings for automatic check (front view). position of the carriage, if a turn of the crank presses the lever hs downwardsfrom the disc p^ A displacement of the carriage during a crank turn is thusmade impossible. If the carriage is incorrectly…
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