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The slitting mill, introduced to England in 1590, simplified the production of nail rods, but the real first efforts to mechanise the nail-making process itself occurred between 1790 and 1820, initially in England and the United States, when various machines were invented to automate and speed up the process of making nails from bars of wrought ...
An intramedullary rod, also known as an intramedullary nail (IM nail) or inter-locking nail or Küntscher nail (without proximal or distal fixation), is a metal rod forced into the medullary cavity of a bone. IM nails have long been used to treat fractures of long bones of the body.
The slitting mill was a watermill for slitting bars of iron into rods. The rods then were passed to nailers who made the rods into nails, by giving them a point and head. The slitting mill was probably invented near Liège in what is now Belgium. The first slitting mill in England was built at Dartford, Kent in 1590.
Küntscher invented what is known as the Küntscher nail, an internal fixation device used to maintain the position of the fracture fragments during healing. The nail is rigid and has a cloverleaf shape in cross-section. Küntscher first performed the process using the nail in November 1939 at the University Department of Surgery in Kiel.
These tools were developed by Mine Safety Appliances, for the United States Navy. [4] Powder-actuated tools were investigated and used prior to this development; they were used in anti-submarine warfare during the First World War and were the subject of a 1921 United States patent (US Patent No. 1365869).
It was invented in 1830, by Dr. Sitts, a European podiatrist, who adapted a dental tool for manicure purposes. Before this invention, people used acid, a metal rod, and scissors to shape and trim nails. In 1892, Dr. Sitts' niece invented a nail-care line for women of any social class, eventually reaching United States salons. [10]
A variety of nail clippers; the clipper on the left is in the plier style; the centre and right clippers are in the compound lever style. A nail clipper (also called nail clippers, a nail trimmer, a nail cutter or nipper type) is a hand tool used to trim fingernails, toenails and hangnails.
The wooden fuselage was nailed together and glued, and then the nails were removed. [1] [2] The first nail gun used air pressure and was introduced to the market in 1950 to speed the construction of housing floor sheathing and sub-floors. With the original nail gun, the operator used it while standing and could nail 40 to 60 nails a minute.