others, thus creating different combinations. When all these little “sliders” have been pushed down to the proper distance, side openings in them match the edge of a fixed plate and they are left free to pass around the inside casing, together with the central disk which carried them, the turning of which is effected by the key.
In 1818, Chubb patented his “Detector Lock,” which had a tremendous vogue. The introduction of a wrong key or tampering with the lock threw
the tumblers out of correct alignment, and the proper key had to be worked the reverse way for an instant before the lock could be opened. The Chubb lock has passed out of use but its mechanical principles, improved and changed, are found today in many of the simpler forms of locks.
Editor’s Note. This is the first of two articles by Mr. Harris on the history and development of hardware. The second article will appear in our issue of November 21.
BRONZE GRILLE FOR THE TRENTON SAVINGS FUND SOCIETY, TRENTON, N. J.
DESIGNED BY ROLF WILLIAM BAUHAN, ARCHITECT
In 1818, Chubb patented his “Detector Lock,” which had a tremendous vogue. The introduction of a wrong key or tampering with the lock threw
the tumblers out of correct alignment, and the proper key had to be worked the reverse way for an instant before the lock could be opened. The Chubb lock has passed out of use but its mechanical principles, improved and changed, are found today in many of the simpler forms of locks.
Editor’s Note. This is the first of two articles by Mr. Harris on the history and development of hardware. The second article will appear in our issue of November 21.
BRONZE GRILLE FOR THE TRENTON SAVINGS FUND SOCIETY, TRENTON, N. J.
DESIGNED BY ROLF WILLIAM BAUHAN, ARCHITECT