Patent GB-464683-A (GB)
Title: Scarfing and boring machine
IPC: B27M3/32
Filed: 1935-10-18
Abstract: 464,683. Machines for scarfing, boring, and sawing poles. BICKER, W. R., and BURT, BOULTON, & HAYWOOD, Ltd. Oct. 18, 1935, Nos. 28819 and 34767. [Classes 145 (i) and 145 (ii)] [Also in Group XXII] A machine for operating on telegraph poles and the like comprises means to feed the pole in the direction of its length to a rotary cutter which scarfs it, one or more drills or augers arranged in tandem with respect to the direction of feed, and means for ensuring the correct dimensioning of the scarf or scarfs and the positioning of the hole or holes. In addition, means for cross-cutting or " roofing " the end of the pole may be provided. In the machine shown, the pole is supported on, and fed forwardly by, a pair of serrated V-form rollers 12 adjustable to and from one another on the shaft 11 to accommodate poles of different diameters. The shaft 11 is carried by arms 10 mounted on a shaft 3 which may be rocked by a hand lever 4 to raise and lower the rollers. The rollers are rotated through gears 13, 14, 15 and a sprocket chain drive 17 from a shaft 19 driven by a motor 27 through a variable speed gear 23, worm drive 21, and friction clutch 20. A counterweight 31 tends to lift the rollers and so forces the pole against the underside of an adjustable roller 38 which controls the depth of the scarf effected by a cutter 39. The cutter and a fan 46 for drawing off the cuttings through a duct 47, are driven by a motor 44. The rolls 12 feed the pole under the cutter until the end of the pole contacts with a hinged stop bar 48, when the friction clutch 20 slips and the rolls cease to rotate. Transverse holes are then bored by augers 53 carried by vertically-sliding spindle 55 connected by a cross-head 56 with link connections to a hand lever 67 by which it is raised and lowered, the spindles being geared together and one spindle being driven by a sprocket chain 74 from a motor 76. The augers press through guide plates 77. To drill a further hole, the pivoted stop bar 48 is moved out of position and the pole fed forward by the rolls 12 until it engages a further stop 79 on a pivoted bar 80, the surface meanwhile continuing. A roller 91 against which the pole bears, and which is carried on a linkwork system operated by a pedal 99, is then depressed, thus lowering the pole from the cutter 39 and disengaging its end from the stop 79, the pole then moving forward and engaging the bar 80. The pole is then centralized by means of a linkage comprising two upright pivoted bars adapted to engage it on each side, and oscillatable by a lever 105 about their lower pivoted ends, in order to enable a vertically-movable locating plunger 90 to be engaged in the end hole already drilled. The third hole is now drilled, one auger passing into the second of the previously-drilled holes. To enable four or more holes to be drilled further hinged stops 114 are provided, together with a stop 111 which determines the extent of the scarfing operation and can be secured in position in advance of any one of them. To cross-cut of " roof " the end of the pole the feed-rollers 12 are stopped and lowered to the position shown in Fig. 1, and the end of the pole is secured in a holder comprising two oppositely-sliding plates indicated at 121 having V-notches in their ends between which the pole is gripped. The saw 35 with its motor 142 are supported on a bedplate 138, Fig. 7, carried by stub shafts 143 mounted in sleeves 144, so that the bedplate may be adjusted by a hand wheel 153 to bring the saw into the two angular positions for forming the roofed end. The sleeves 144 are formed with flats which ride on rollers 146 as the saw is fed into the work, and the supporting frame 148 is carried on rollers 149 to enable the saw to be adjusted axially of the pole. During all the operations the butt end of the pole is supported at adjustable height on a trolley running on a track.