MANUFACTURERS TO TIIE QUEEN AND ÏÏ. R. H. PRINCE ALBERT.

CHUBB'S PATENT DETECTOR LOCKS57 SI PAUL'S CHURCHYARD LONDON.

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GREAT EXHIBITION OE 1851.

CHUBB & SON—FOR LOCKS, Prize Medal and Special Approbation.”

Chubb’s Looks have now been used for more than thirty years by Bankers, the Governments of this and otherCountries, and by many hundreds of thousands of individuals, and no instance has ever occurred of any robberieshaving taken place through these Locks having been picked or opened by false Keys. The great care exercised intheir manufacture, and the moderate prices at which they are sold, still cause them to maintain their pre-eminentposition as the most secure Locks for general as well as special purposes.

CHUBB & SON have invented and applied such improvements in the manufacture of their Locks, as to combinethe greatest security with that simplicity which is essential to Locks used for ordinary purposes. They have latelyadded, besides other improvements, a Patented Invention of great simplicity, which will in future be applied withoutany additional cost. This addition consists of a contrivance, by which, if a false Key or Pick should be inserted, andturned even a small part of the way round, a metal curtain entirely closes up the whole opening, so that all access’ tothe works is effectually cut off, and no Ticks can be worked.

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