Blessing, George F. (George Frederick), 1875-1921, Darling, Lewis A. (Lewis Andrew) · New York, J. Wiley & sons; [etc., etc.] · leaf 48
S 27 spring, controlled by a thumbscrew, to facilitate delicateadjustment. To divide, or step off, a line or circle, manipulate the dividerswith one hand, and, with first one divider point and then theother as a center, rotate the dividers alter-nately to the right, then to the left as ifdescribing… … T, SCREW Fig. 28. — Ordinary BowDividers. 24. Bow Dividers. The bow dividers(see Fig. 28) are used in the same mannerand for the same purpose as the largedividers (see page 26, § 23). The bow dividers when once set main-tain a fixed distance or radius and there-fore in stepping off distances they…
Mechanical drawing
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
