Show ancient wooden locks burden for strong man the most common lock loch now in use on exterior doors of buildings Is the cylinder lock developed by linus yale jr and this leads us back into history primitive prototypes of invention were in use in mesopotamia and egypt as early as 2000 B C these were huge wooden affairs requiring cumbersome keys as we may gather from the biblical Bib lican passage e isaiah 2222 and tile the key hey to the house bouse of david will I 1 lay upon 11 his s shoulder this key or as it was and still Is called in the east Is a stick of wood from 15 to 30 inches long 2 to 4 inches broad and 1 to 2 inches thick into the face of one end are set a number of wooden or iron pegs about an inch long these pegs correspond with as many holes in the wooden bar or bolt which locks the |