Patent GB-779089-A (GB)
Title: Automatic hydraulic giant
Inventor: MISCOVICH JOHN ARTHUR
IPC: B05B3/04
Filed: 1954-05-31
Abstract: 779,089. Supporting and directing nozzles. CHIKSAN CO. May 31, 1954, No. 16092/54. Class 47. [Also in Groups XXVIII and XXIX] A hydraulic giant for use in mining, e.g. for washing gold-bearing sand, comprises a nozzle mounted for horizontal and vertical movements, means supplying liquid under pressure to the nozzle, a first hydraulic ram connected to the nozzle for effecting horizontal movement thereof, a second hydraulic ram connected to the nozzle for effecting vertical movement thereof, and means controlling the rams to effect movement of the nozzle horizontally, vertically, or both horizontally and vertically simultaneously. Water is supplied under pressure to a pipe 12, Fig. 2, having a curved elbow 14 fitted with a flange 16 secured by screws 19, Fig. 8, to a ring 18 housing balls 20. A 90 degrees elbow 34, Fig. 2, has an L-shaped member 24 fitted within the ring 18, Fig. 8, and sealed by packing rings 28 and 30. The elbow 34, Fig. 2, has a flange 36 secured, in similar manner to the flange 16, to a 180 degrees elbow 56 terminating in a flange 60 secured to a similar flange on a 90 degrees elbow 66 formed with a nozzle section 68 having a tip 72 with a valve 76. A ram 80, Figs. 2 and 10, rotates the elbow 34 relatively to the elbow 14 in a horizontal plane by a cable 102 secured to the ring 18. A cylinder 81 secured to the elbow 34, has a piston 86 and a piston rod 88 attached to cross-heads 90, 92 secured to struts 94, 96. The cable 102 is secured to the cylinder 81 or the cross heads 90, 92. A similar ram 108 having a cylinder 109, a piston rod, not shown, and a piston rod 112 actuates a cable 126 to rotate the elbow 56 relatively to the elbow 34, such that the nozzle section 68 is moved up or down. Water is supplied through a pipe 128, a valve 130, a strainer 132, and a control valve 134 to pipes 142, 146, the valve 134 opening when the pressure is sufficient to overcome its spring pressure. Water is supplied to the left end of the cylinder 81 through a reversing valve 144 having a slidable valve 150 actuated by a link 246, through a lever 238 rocked by dogs 258, 260 on the strut 94. Movement of the piston 86, in the direction of the arrow, forces water through a pipe 156 connected to the valve 144 to a speed control valve 162 adjustable by a needle valve 164. The valve 162 is connected by a pipe 166 to a similar valve 170 connected to the valve 144 by a pipe 168. The pipe 166 leads to a self-closing valve 176 and a by-pass 180 having a valve 182. The valve 176 has a valve stem 187 co-operating with a toggle lever 188 which actuates the slidable valve 206 of a reversing valve 148 similar to the valve 144. In operation, when a predetermined pressure is attained in the pipe 128 the valve 134 is opened, thereby supplying water to the nozzle section 68 through a pipe 136 leading to a ram 78 which controls the valve 76. The by-pass valve 182 is opened and a valve 230 closed, while the speed control valves 162 and 170 are adjusted to provide the desired speed of travel of the piston 86 which moves to the right until dog 258 swings the lever 256 to the right to actuate the valve 150 to reverse the flow of water to the cylinder 81. The piston 86 moves to the left, while the lever 238 momentarily opens a valve 226, thereby venting water trapped in a pipe 224,.such that the piston of the ram 108 is actuated to move the section 68 vertically a small amount and then stop while the piston 86 is again actuated. At the end of the stroke of the piston 86, a dog 260 reverses the valve 150. Closing of valve 231 permits only a horizontal movement of the nozzle section 68, while closing of the valve 183 permits only a vertical movement of the section 68. Both valves 231, 183 are opened should a continuous oscillation in both vertical and horizontal directions be required.