Modern mechanism, exhibiting the latest progress in machines, motors, and the transmission of power, being a supplementary volume to Appletons' cyclopaedia of applied mechanics (1892)
Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 505
Figs. 6, 7.—Corbin master-key lock. Fig. 8.—Post-office lock. unlock the door prepared for it, it will bo ineffective on any of the other doors of the build-ing, the said other doors having locks in which the pins will vary in length, but all of whichlocks nuiy be opened by a major key. The Corbin…
Mechanical engineering
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