GB205584A - Improvements in or relating to vanning machines for concentrating ores - Google Patents

Abstract

205,584. Maynard, A. V. T. July 22, 1922. Vanning-machines.-A vanning machine, for concentrating ores whilst in a wet pulp condition, is given an orbital movement parallel to itself in a path that lies in a. vertical plane and conforms substantially to an ellipse by means of two variable-throw eccentrics 25, 26, one of which 25 is preferably duplicated, pivotally linked to the table 10 and rotatable in unison, but out of phase with each other, about parallel axes transverse to the table. A third variable-throw eccentric 25<1> may also be used to constrain the table to move parallel to itself. The eccentric 25<1>, which is also preferably duplicated, is made to rotate in unison with the other two eccentrics 25, 26, and in phase with one of them 25, about an axis parallel to the axes of the other two, and is also pivotally linked to the table. The eccentric 26 is mounted on a shaft 14 which drives the eccentric shaft 15, 16 through transmission shafts 17, 18 and equal-sized bevel wheels 21-24, the eccentrics 25, 25<1>, 26 being connected to the table 10 by connecting-rods 29, 29<1>, 27 respectively. The separated material is pitched over the end of the table into a receptacle, and the waste material is washed off by clean water introduced on to the surface of the table. Means other than the eccentrics 25<1> may be used to constrain the table to move parallel to itself, and the table may be suspended from its operating means instead of resting on it, as shown.