Five hundred and seven mechanical movements (1903)
Brown, Henry T. [from old catalog] · New York, Brown & Seward · leaf 55
197 … Mechanical Movements. 51 189. Another modification of 186. 190. A screw-clamp. On turning thehandle the screw thrusts upward against theholder, which, operating as a lever, holdsdown the piece of wood or other materialplaced under it on the other side of its ful-crum. 191. Scroll-gears for…
Mechanical movements
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
