"Files. a, cotter-file when large, and verge- or pivot-file when small; b, square file (parallel or…
"E represents the scape-wheel turning in a minute, and e its pinion, which is driven by the wheel D…
Gray & Davis starting motor with reduction gearing for open flywheel. 1-Motor Pinion; 2-Intermediate…
"Dollond's divided object-glass heliometer of the third type. A is the end of the reflecting telescope,…
A straight or slightly curved metallic bar, with teeth n one of its edge, adapted to work into the teeth…
"a, scroll-wheel, intermeshing with the pinion b, which, sliding by a feather on the shaft, c, imparts…
"A machine for turning a roasting-spit by means of a fly-wheel or -wheels, set in motion by the current…