By Mary Bellis
Jacob Perkins invented a method of plating shoe-buckles. Jacob Perkins invented a machine for cutting and heading nails in one operation (1795) and created improvements in bank-note engraving (steel) plates. Jacob Perkins invented the bathometer (measures the depth of water) and the pleometer (measures the speed at which a vessel moves through the water). Perkins also invented an early refrigerator (really an ether ice machine). Jacob Perkins improved steam engines (radiator for use with hot water central heating - 1830) and made improvements to guns.
Biography of inventor, Jacob Perkins.
Jacob Perkins was the originator of using steel, instead of copper plates, for engraving banknotes.