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 791
w York City isillustrated in Figs. 5 and6. The vault occupies twofloors, and weighs, exclu-sive of the masonry, almost200,000 lbs. Both upperand lower vaults are pro-vided with two inner orburglar-proof doors.These are 8 in. in thick-ness, and each door weighsa little less than 22,000lbs. Inside of… … Fi(i. y.-Herring safe. each jamb, so that when closed the doors are firmly keyed to the body of the structure.There are 20 steel bolts in each door, which secure it on all sides. Those doors aremade fast by two Dexter bank locks, which may be unlocked by either of two dials. They aresafe against a…
Mechanical engineering
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![An illustration from Bicknell's village builder. Elevations and plans for cottages, villas, suburban residences, farm houses [etc.] also exterior and interior details for public and private buildings, with approved forms of contracts and specifications. Containing fifty-five plates drawn to scale (1872)](https://img.insideoutlibrary.com/img/200/ia-bicknellsvillage00bick-196-184.webp)