Appleton's dictionary of machines, mechanics, engine-work, and engineering : illustrated with four thousand engravings on wood ; in two volumes (1873)
D. Appleton and Company · New York : D. Appleton and Co. · leaf 842
The regulation of the number of strokes is effected by means of a snail, exactly resembling that of aclock. At I in either of the figures is seen the quarter-snail, placed on the axis of the minute-hand, soas to revolve every hour, and cut into four steps. The same axle carries a projecting piece…
Mechanical engineering · Mechanics · Engineering
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
