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Bewerken van stap 4 —

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Sleep om te herschikken

Turning the zeroing crank counterclockwise sets the counter digits to zero, while turning it clockwise sets the accumulator digits to zero. Amazing!

Nelson White's U.S. patent "Zero-setting mechanism", filed in 1920, describes how this amazing thing works.

This amazing thing practically never works properly after half a century of neglect.

On the right side of the carriage, unscrew and remove the zeroing crank. Hold the crank while unscrewing.

4-48 machine screw, 1/4"

Zeroing crank

Je bijdragen zijn gelicenseerd onder de open source Creative Commons licentie.