Patent GB-1009395-A (GB)
Title: Concentrating table
Inventor: WEBER DON ANDREW
IPC: B03B5/04
Filed: 1962-05-22
Abstract: 1,009,395. Washing granular materials. DEICON EASTERN CORPORATION. May 22, 1962, No. 19624/62. Heading B2H. In a multiple-deck, pendantly-supported concentrating table, e.g. for concentrating ore, having a head end drive mechanism of the poly-eccentric flywheel type which generates reciprocating motion having quicker reversal at one end of the stroke than at the other, a rigid member connects all decks together at a point remote from the drive mechanism. As shown in Fig. 1, the table comprises riffled or smooth decks 1, 2, 3 each provided with a feed box 4 and a wash water distributer 5. The decks overhang collecting troughs 11, 12, 13 and 16, 26, 36 mounted on fixed supports 17, 18, 19 respectively at their discharge sides 9 and discharge ends 15. The troughs may be equipped with slidably mounted cutting pans 20 for adjusting the cut between recovered and rejected material. The driving mechanism 25, which may be similar to that described in Specification 837,136, is pivotably supported on pairs of cables 27, 28 and is connected through a yoke 32 and swivel connections 320, Fig. 2, to the underframes 41, 42, 43 of the respective decks. The opposite ends of the decks are suported on a cable 33 pivotably connected to a lug 34 on a yoke bar 35 which constitutes the rigid member and is in turn connected through brackets 37, 38, 39 to the deck underframes. Each bracket is swivably mounted by a bearing 45, Fig. 8, on a bolt 46 which is fixed relative to the yoke bar 35 on tightening of a nut 51. The swivel form of bearing 45 permits adjustment in side tilt of the respective decks and changes in end elevation of one deck relative to another. The latter adjustment may be effected by a set screw 53 when the nut 51 is relaxed. The cables 27, 28, 33, which may be replaced by rigid rods or links are pivotably anchored at their upper ends to overhead parallel beams 56 hingedly mounted at one end on a fixed beam 63 and at the other end on another fixed beam 64 through an adjustment mechanism, Fig. 13, comprising shoes 69, 70 and wedges 67, 68 having racks 74, 75 in engagement with a pinion 73 mounted on a shaft 72 which may be rotated through a sprocket 76 and chain 77 to raise or lower the ends 66 of the beams 56 relative to the beam 64 thereby decreasing or increasing the end elevations of the decks 1, 2, 3. To effect side tilt of the decks collectively and/or individually, a mechanism is mounted upon one or each of cross-members 78, 79 extending perpendicular to the beams 56. Thus, one mechanism may be mounted upon a diagonal beam 80, Fig. 1, secured at one end to one of the beams 56 and near its other end to cross-member 79. The beam 80 carries at its outer extremity a fitting 83, Fig. 3, in which a slidable follower 86 controlled by a wedge 85 is pivotably connected to a cable or other member 89 to which the individually side tilt control mechanism may be connected. Similarly, another individual side tilt control mechanism may be connected to the end of a cable 94 connected by means of follower 92, wedge 93 and fitting 91 mounted on a beam 90 supported by the cross-member 78. The wedges 85, 93 are interconnected by a rod 95 which may be rotated, while the table is in operation, through racks and pinion by a shaft 98 operated by a sprocket wheel 100 and chain 101 in order, for example, to raise follower 86 and lower follower 92 and the individual side tilt control mechanism attached thereto thereby decreasing the sde tilt of all decks collectively. Fig. 12 shows the individual side tilt control mechanism pivotally connected to the end of cable 14 and comprising a frame 104 having a lug 103 connected to the cable and in which is journalled a worm 105 which is in threaded engagement with a follower 106 pivotally attached to a bracket 107 secured to the under frame 42 of deck 2 and which is operated by a handwheel 108 to tilt the adjacent corner of deck 2 independently of the other decks. Decks 1 and 3 are tilted individually by rotating handwheels 113, 117 which carry rods 110, 114 connected to brackets 112, 116 on the underframes 41, 43 and are in threaded engagement with a barrel 109 carried by the frame 104. The cable 94 is kept taut by a weight 118. Fig. 16 shows an alternative individual side tilt mechanism consisting of a yoke bar 350 which may be connected to brackets 121, 122, 123 on the underframes 41; 42, 43, Fig. 1, through elongated arcuate slots 470 in the same manner as yoke bar 35 is connected to brackets 37 to 39. The bar 350 may be pivotally attached to the lower end of cable 89 or carried solely by its connection to brackets 121 to 123.