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 106
ed to project, corresponding to the amount of the forwardpush. A special toothed gearing on the sliding bar engages simultaneouslywith gear wheels which are fitted with digits, thus registering the numberof teeth set on the disc, and likewise the number set in the calculatingmechanism. The… … Fig. io.—Sliding Carriage. mechanism is accomplished automatically in the pulling forward of thedriving handle. The counting itself is carried out by causing the tootheddiscs to revolve. In each complete revolution of these discs the projectingteeth engage with the wheels of the sliding carriage,…
