| Show changeable LOCK AND kny KEY A very verv in ini genious gen ions changeable and loci lock has been inv dinv invented anted the key is so construct constructed id that it is capable of an inexhaustible humber number of chan changes chanes es this is effected by providing it with slides slide s which work in grooves in elch mich sich a manner that each slide may be moved with oi ith tiie the nail menthe when men the the required ement is made the whole is tightened by a screw and whatever form forin the screw is thus made to assume the lock adjusts itself totham form in the act of locking and only that for forma forra ni or arrangement of the ke will then unlock it this is all an in ingenious device and is said to operate to great perfection 1 |
