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Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in construcive and operative mechinery and the mechanical arts, being practically a mechanical dictionary (1917)

Hiscox, Gardner Dexter, 1822?-1908 · New York : The Norman W. Henley publishing co. · leaf 381

An illustration from Mechanical movements, powers and devices; a treatise describing mechanical movements and devices used in construcive and operative mechinery and the mechanical arts, being practically a mechanical dictionary, 1917, leaf 381
1544. DOOR PUSH CHECK.—The spring closes the door. The piston in the cylinder has a valve to allow quick inlet of air when opening a door, and a small hole adjustable at the bottom of the cylinder for slowly discharging the air. n >u 1545. FOLDING LADDER.—The rounds arepivoted to the side… … 1546. SIMPLE COMBINATION LOCK. —A number of discs arranged on a spindlehaving a feather key. The discs are notchedto match the notches in the key so that theyreadily turn to be set to the register number torelease the spindle.

Mechanical movements

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