63.5 MB (2.7 MB compressed)
4080 x 5440 pixels
34.5 x 46.0 cm ⏐ 13.6 x 18.1 in (300dpi)
TEK IMAGE / SCIENCE PHOTO LIBRARY TEK IMAGE / SCIENCE PHOTO LIBRARY
Key. When this key is inserted into its lock, the grooves and ridged edge (lower frame), release a pin-tumbler cylinder mechanism, allowing the key to be turned to open the lock. The design of each lock/key set varies, preventing other keys from opening a particular lock. This is a Yale-type key. The Yale lock system was patented in 1861.
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