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 313
re are called the escutcheon, which not only comprises the cylinder, but the part above it, con-taining holes corresponding to those in the cylinder, and holding the same number of pins, 1, 2, 3, 4,5, which, by means of spiral springs, are partly forced down into the holes in the cylinder when…
Mechanical engineering -- Dictionaries
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