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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 312

An illustration from Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts, 1880, leaf 312 — action brings the attached arm against the case of the lock, by which means the tumblers are re-lieved from pressure by the stump, so that their positions cannot be ascertained by the burglar.The key, Fig. 2824, turns on the pin k, and the tumblers rest on the piece r. This lock, after defy-ing the…

Mechanical engineering -- Dictionaries

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