Abstract: An apparatus for creating a rough-sawn texture on all four sides of surfaced lumber has two pair of sleds which carry endless loop chains having roughening teeth projecting outwardly therefrom. The sleds have planar faces with slots extending across them that the roughening teeth project through, and in one pair of sleds the faces are oriented vertically and in the other pair the faces are oriented horizontally. One of the sleds in each pair is fixed on a frame which supports the apparatus and the other sled in each pair is slidably mounted in tracks. Thus the distance between the faces can be adjusted so that they abut the sides of a particular size piece of lumber. The chains are carried on sprockets that are mounted on the sled and are driven by motors so that the roughening teeth move across the piece of lumber being processed.

Abstract: A simplified, safe, fast and economical method of refining gold and a versatile apparatus for practicing the method are disclosed. The process and the apparatus are ideally suited for reclaiming substantially pure gold from gold jewelry and gold alloy scrap. Gold alloy to be refined is inquarted with a non-ferrous metal or metal alloy and the resulting gold alloy is cast into slab anodes which are suspended in an electrolytic cell containing a nitric acid solution as the electrolyte. The cell includes a stainless steel container cathode to retain gold mud or slime precipitated from the slab anode during the electrolytic process. If platinum and/or palladium are present in the gold alloy to be refined, inquartation with silver is carried out, and these platinum metals are dissolved in the electrolyte solution. If iridium or any other platinum metals are present in the gold alloy to be refined, they will remain in the resulting gold mud and subsequent treatment with aqua regia is necessary.

Abstract: A simplified, safe, fast and economical method of refining gold and a versatile apparatus for practicing the method are disclosed. The process and the apparatus are ideally suited for reclaiming substantially pure gold from gold jewelry and gold alloy scrap. Gold alloy to be refined is inquarted with a non-ferrous metal or metal alloy and the resulting gold alloy is cast into slab anodes which are suspended in an electrolytic cell containing a mild nitric acid solution as the electrolyte. The cell includes a stainless steel container cathode to retain gold mud or slime precipitated from the slab anode during the electrolytic process. If platinum and/or palladium are present in the gold alloy to be refined inquartation with silver is carried out, and these platinum metals are dissolved in the electrolyte solution. If iridium or any other platinum metals are present in the gold alloy to be refined, they will remain in the resulting gold mud and subsequent treatment with aqua regia is necessary.