Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . ought to embrace the pin g at-tached to the bolt /. When the fence is depressed,the bolt may be moved backward or forward. The Yale double-dial lock is represented in It consists of a heavy gun-metal case, measuring 7 by 9 inches, in which are two complete sets of permutating wheels or tumblers, eachcontrolled on the outside by its respective dial and spindle. In the centre of the lock is a bolt whichis common to and controlled by both sets of dials and their tumblers. The ob
Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts . ought to embrace the pin g at-tached to the bolt /. When the fence is depressed,the bolt may be moved backward or forward. The Yale double-dial lock is represented in It consists of a heavy gun-metal case, measuring 7 by 9 inches, in which are two complete sets of permutating wheels or tumblers, eachcontrolled on the outside by its respective dial and spindle. In the centre of the lock is a bolt whichis common to and controlled by both sets of dials and their tumblers. The object of this mode ofconstruction is to guard against the possibility of a lock-out arising from the accidental derange-ment of either of the two locks which are thus brought in combination. The bolt, being susceptibleof control by either or both of the two dials, may be locked or unlocked by either of them indepen-dently of the other, and a lock-out is thus made impossible except in the most improbable event ofboth dials, and the mechanism controlled by them, being deranged simultaneously. A further pur-. 302 LOCKS.
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Keywords: ., bookauthorbenjaminpark18491922, bookcentury1800, bookdecade1880
