For hundreds of years, keys have represented authority, security and power. Keys open doors, and also provide a sense of mystique. Where there is a lock, there is something of value behind it being protected. On that note, between 1774 and 1920, American lockmakers patented roughly 3,000 varieties of lock devices.
Before locks and keys, cords of ropes were used to lock doors and tie up walls. In addition, in the days of the Emperor of Annam in India, valuables were sealed into blocks of wood that were then placed on small islands or submerged into surrounding pools of inner courts of palaces. These wooden blocks were then kept guarded by “guardian angels,” which were perpetually starving crocodiles.
For the most part, a lock is a mechanical or electronic fastening device that is released by a physic
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