Combination lock
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A combination lock is a type of locking device in which a sequence of symbols, usually numbers, is used to open the lock. The sequence may be entered using a single rotating dial which interacts with
A Wordlock letter combination lock
A simple combination lock
A single-dial padlock by Master Lock
The component parts of a Stoplock combination padlock
Gerolamo Cardano
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Gerolamo Cardano was an Italian polymath whose interests and proficiencies ranged through those of mathematician, physician, biologist, physicist, chemist, astrologer, astronomer, philosopher, music t
Combination lock
…combination locks were made by astrolabe maker Muhammad al-Asturlabi, including a piece of a combination lock on a strongbox he made c. 1200 that survived. Gerolamo Cardano later described a combination lock in the 16th century. U.S. Patents regarding combination padlocks by J.B. Gray in 1841 and by J.E. Treat in 1869…
17th-century portrait engraving of Cardano
De propria vita, 1821
Portrait of Cardano on display at the School of Mathematics and Statistics, University of St Andrews
"Oneiron" ("Dream"), reverse of the medallion of Cardano by Leone Leoni, 1550–51