GB208835A - Improvements in and relating to magnetic separators - Google Patents

Abstract

208,835. Thompson, H. H., and Davies, A. E. Oct. 11, 1922, Magnetic separators.-Relates to separators of the type wherein a drum rotates about fixed magnets, so disposed as to provide a part of the drum surface uninfluenced by the magnetic field. In addition to a longitudinal line or lines of magnets or poles, the poles in either case being of different polarity, there are provided circumferentially directed poles, so that any magnetic material falling during the change-over from one field to another in one part of its travel will be securely held to the drum surface in the other part of its travel over the magnets or poles. In the form shown in Figs. 1 and 2, the drum d surrounds a magnet structure comprising longitudinal lines of poles h - - k and a series of circumferential poles l, m, n having shoes s, t, u, the different polarities being preferably as indicated. In a modification, Figs. 3' and 4, a casting e is provided with projections f, g, h, and coils i, j so wound as to effect the polarity shown. The poles f<1> form a longitudinal series, those f<2> g<1>, g<2> form solid longitudinal pieces, while the poles h' are circumferentially directed.