Dating antique chairs
The screw on the left was handmade in the late 18th century.
Note the flat spot on the shaft, the irregular threads, blunt tip and the off center slot.
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If there is a particular collectible or antique you are interested in, suggest it to us. Before 1600 chairs were used only by the master and mistress of the house. Although increasingly used by lesser mortals too during the 17th C, the presence of arms and the extent and elaboration of carving found on many chairs still indicated their high status.
The 17th C saw the widespread introduction of The 17th C saw the widespread introduction of 'back-stool', literally a stool with a back.
The screw in the center is machine made around 1830.
It has sharp, even threads, a cylindrical shape, blunt end and the slot is still off center.
The same was true for hinges used under a table leaf. Archimedes, the Greek scholar and mathematician of the third century B.
Damp floors, wood worms and ill usage have taken their toll on all original sets.
Above is a wonderful example of an antique corner chair which was an English fashion that develop during the first half of the 18th century.
The screw on the right is a modern gimlet screw, post 1848, with tapered shaft, even threads, pointed tip and centered slot. The handmade nails of the period derived much of their holding power from the ability to drive the nail through two surfaces and bend it over on the back side, i.e. But that solution would not work for securing the top on a chest of drawers or table top without either driving a nail through the top from above or clinching it on the top to hold it fast.
The same problem arose while trying to affix a lock to the back side of a drawer.