Patent GB-190721063-A (GB)
Title: Improvements in or relating to Dry Concentration of Ores.
Inventor: SUTTON HENRY MOORE
Filed: 1907-09-23
Granted: 1908-06-11
Abstract: 21,063. Sutton, H. M., Steele, W. L., and Steele, E. G. Sept. 22, 1906, [date appliedfor under Patents Act, 1901]. Separating ores &c.-Relates to a modification of the apparatus described in Specification No. 17,561, A.D. 1905, for the dry concentration of ores, in which the material falling on a table is stratified by the air passing up through the pervious top, the longitudinal vibration and inclination of the table causing the products of concentration to be discharged at different points. The riflies previously employed on the upper surface of the table are now dispensed with, and means are provided for rendering the air pressure decreasingly effective transversely of the floor, and increasingly effective, longitudinally. The inclined supports 5, Figs. 1, 2, and 4, at the lower side of the table have their upper ends forked to carry bearing-rods 6 fitting blocks 7 on the underside of the table, while their lower ends are recessed to receive the rounded ends of the adjusting-bolts 10. The lower end of the support 5 at the feed end of the table fits in a recess in a bearing-block 13, and at the upper or feed side of the table a rounded head 15 engages a socket 16 at the upper end of a link 17 having a socket at its lower end to receive the rounded head of a bolt 20, which can be adjusted by worm gearing so as to elevate or depress the feed side of the table. A duplicate bolt 20 and worm gearing is provided near the feed end of the table. The table is reciprocated with a slow forward and quick return movement by a rod 42 connected to a yoke 41 carried by trunnions on a block 38, Fig. 6, adjustable in a slot in the short arm of a bell-crank lever 35, the other slotted arm of which is engaged by an eccentric 33 on the main shaft 29. The lower end of each supporting-spring 48 is secured in a clamp 52 on a bracket 51, and the extension 53 of the spring bears against an adjusting-screw 54. The pervious floor 93, Fig. 13, of the table rests on longitudinal ribs 74 supported by transverse ribs 72 having openings 73 to permit the air introduced by the pipes 71<a> to pass into all parts of the air chamber. The ribs 74 are tapered as shown at 83, and are preferably formed by making slits in a plank of suitable width, leaving portions unslitted for the passage of the transverse binding-rods 80. The air-retarding strips 95 arranged upon the ribs 74 at the feed end of the table decrease in width from the delivery side to the feed side and are tapered longitudinally, the strips terminating on the diagonal line C F. The triangular upper forward portion of the table has a series of strips 96 of the same width as the upper surfaces of the ribs 74 upon which they are mounted, but diminishing in height towards the corner C and terminating along the diagonal line C-F. The pervious floor and the air - retarding strips are secured to the ribs 74 by tacks. The table may be formed with longitudinal grooves or channels, plates or bars 100 being interposed between the ribs 74 or upon alternate ribs, as shown in Figs. 19 and 22 respectively; the channels may terminate in the diagonal line C-F or merge into an unchannelled portion at the delivery end of the table. Another method of varying the action of the air passing upwards through the floor consists in securing to the underside of the pervious floor 93 several overlapping strips of cloth 102, 103, 104, shaped as shown in Fig. 16. Strips impervious to air may be used. The feed trough 62 is supported by adjustable rods 64 and reciprocated by a rod 60 from a crank on the shaft 57, a short bar 98 preventing the immediate movement of the pulverulent material along the table as it emerges from the trough. Inclined delivery shelves 84, 85 are provided at the lower side and delivery end of the table. The shelf 84 is provided with a rail 86 supported by spacing-tubes 87, and, by means of fingers 91 held in position by a wedge 92, is divided into sections constituting shoots or spouts for directing the product of the table in its passage over the shelf.