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 148
e are from six to ten slots bearing on theiredges the multiplicand digits, with studs S, which are set to the required values. Any stud S shifts, by sliding, the pinion B along its axis b, so as to engagewith the requisite number of the unequal teeth on the barrel of the steppedreckoner A. The… … Fig-. 58.—L. Jacob, Le Calcul Mecanique. (Doin, Paris). one revolution of H gives a rotation to b corresponding to the digit at whichS is set. If the carriage C is lowered so that the bevel wheels d and i engage, thisrotation is conveyed through d to the indicators of the product holes, wherethe…
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