Patent GB-448434-A (GB)
Title: Improvements in and relating to mining apparatus
IPC: E21C31/00
Filed: 1934-12-01
Abstract: 448,434. Coal - mining machines. TRIGGS, W. W., 57, Lincoln's Inn Fields, London.-(Sullivan Machinery Co.; 400, North Michigan Avenue, Chicago, U.S.A.) Dec. 1, 1934, No. 34598. [Class 68 (i)] In a coal-mining machine comprising a base carrying a mounting for swinging an arm structure thereon about a vertical axis, the arm being swing- able vertically about a horizontal axis and carrying at its outer end a kerf cutter, while a rotary head provides for adjusting the kerf cutter for cutting in any plane between the horizontal and the vertical, the horizontal axis about which the arm swings is between the kerf cutter and the vertical axis of swing and mechanical power transmission means is provided to effect all the different adjustments. A wheeled truck 1, Figs. 1 and 4, carries a turntable 4 and a reversible electric motor 20 which drives a shaft 27 through worm gearing 25 and variable speed planet gearing 29 ; through a double clutch 37, the shaft may drive either a truck-driving chain 51, or bevel gearing 40, chain 43 and spur gear 46 to rotate the turntable. The turntable may then be locked by stop 48, while a brake 53 may be operated by lever 56 to hold the truck. The machine body 5 is carried on the turntable and contains reversible electric motor 60. An arm 8 is pivoted to the body 5 by a horizontal pin 63 and carries a head 9 rotatable about the axis of arm 8 ; head 9 carries a further arm 10 pivoted on transverse pin 72, Figs. 6 and 7, arm 10 supporting the sluing cutter chain jib 7. The motor shaft 61 carries a loose worm 74 which may be driven through disc clutch 73 and drives worm gears placed one on each side, these worm gears each acting through spur gears 79, 81, Fig. 4, worms 85 and gear segments 87 to swing the arm 8. Reversing gear may be provided in the drive for the arm 8. The front end of the shaft 61, through bevel gears 90 ... 92, Fig. 1, driven shaft 93, Figs. 4 and 6, passing through head 9 ; shaft 93 may rotate the head 9 through spur gears 94, 95, Fig. 4, reversing bevel gearing 98 controlled by disc clutches, worm gearing 104, gear 106 and internal gear 107. The front end of shaft 93 acts through bevel gears 109, 110, Figs. 6 and 7, spur gearing 112, 113, 115, a disc clutch, opposite worm gearings 120, worms 124 and gear segments 126 to swing the arm 10. Reversing gearing may also be included in this drive. The bevel gear 110 also acts through bevel gears 130, 132, 133, clutch 135, shaft 134, and sprocket 136 to drive the cutter chain ; shaft 134 may also effect sluing of the cutter chain jib 7 through spur gearing 144 ... 146, and either slow worm gearing 151 or fast worm gearing 152 which, through disc clutches, drive worm 156, worm wheel 157 and pinion 160 engaging internal gear 161. The gears 133,144, may be integral and adapted to be clutched to the shaft 134 so that the cutter chain may be idle during the various adjustments. The gear for swinging the arm 10 may be so proportioned to that for swinging the arm 8 and to the low speed turntable drive that with the cutter chain jib positioned for horizontal cutting, the arms 8, 10 may swing oppositely so that the jib remains horizontal, while when the jib is positioned for vertical cutting, the swinging of the arm 10 and the turntable drive combine to cause the cutter jib to remain parallel to its initial position. In a modification, Fig. 11, arm 165, pivoted at 63, is pivoted at 167 to arm 168, the arms 165, 168 having swinging gear similar to the gears for swinging the arms 8, 10 of Figs. 1, 4, 6 and 7. The arm 168 carries a rotatable head 169 directly supporting the cutter jib. The cutter-chain drive shaft acts through reversing bevel gearing 207 and disc clutches to drive a transverse shaft 210 to which worms 212, 217 may be connected by clutches 211, 218 ; worm 212 acts through worm wheel 213, pinion and internal gear 216 to slue the cutter jib, while worm 217 acts through shaft 220, pinion 221 and internal gear 222 to rotate the head 169.