Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 381
in contactwith the lever R and linked tothe index lever L, its endholding a pencil that marksthe variation of pressure on tHe graduated paper on a drum driven by a clock. 370 DRAUGHTING DEVICES. 1531/L DOTTING INSTRU-MENT.—One of the toothedwheels for the kind of dotting re-quired is placed on the…
Mechanical movements
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
