Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 570
by means of thumb-screws at each end, so that the plane can be used upon curved work. In Figs.3395 and 3396 are represented two forms of adjustable block-planes. These are adjusted by a screwand lever movement, and the mouth can be opened wide or made close as the nature of the workmay require.…
Mechanical engineering -- Dictionaries
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