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Scientific American, Vol. 13, No. 4 (October 3, 1857) (1857)

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An illustration from Scientific American, Vol. 13, No. 4 (October 3, 1857), 1857, leaf 0
e either to delicately sensitive and accom- locking it.” plished fiacers, or to the more violent action The front of the lock consists of two plates, of drills and gunpowder. The lock now about the innermost of whichis cast with the frame, to be presented is claimed to be absolutely and the… … are mounted in a pod which is so attached to form represented. 6 6 are notches on the un- the stout shank of the key, that it is readily est indication of the shape of the key, in the other key hole locks. The key does not pass der side of B, and 8’ is a vertical groove separable. The bits alone…

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