Patent GB-243151-A (GB)
Title: Improvements in or relating to apparatus for cutting pipes
IPC: B23D21/10
Filed: 1924-11-07
Abstract: 243,151. Shipley, A. H., and Berry, A. B. Nov. 7, 1924. Portable turning-apparatus.-In portable apparatus particularly designed for cutting-off pipes in situ, of the kind comprising a split rotary tool - head carried by a split bearing attached to the pipe by set screws and having means for feeding and rotating the tools the bearing 1, formed in halves bolted at 2, is secured to the pipe by radial screwed spindles 34 shaped at each end to receive a spanner &c. and working in bushes 33, Fig. 4, locked to the bearing by screws 37 and slots 39. The radial pressure is taken by collars 35 on the bushes, the latter being unsymmetrical about the collars so that the bearing may be accommodated to different sized pipes by turning the bushes end for end. The spindles may all be set at the same diameter by means of marks thereon and they are arranged in staggered relation so as to bear on the work along two longitudinally spaced circles. The tool-head 5 carries three toolboxes 40 radially adjustable by means of grooves 43 and bolts 44, Fig. 3, engaging one pair of a series of holes in each box. The tool-holders 45, Figs. 3 and 4, are fed radially by screwed spindles 4'6 carrying star-wheels 47 for engagement with a fixed projection 48 on the bearing 1 and are prevented from rotating by keys 57 and flattened portions 56. The tapered shanks of the tools 49 are secured by screws 53, to which access is obtained by means of holes 55 in the boxes, and two succeeding tools are arranged to cut opposite sides of a groove while the third cuts the bottom. The projection 48 is adjustable on a radial bracket 50 to suit different diameters of work. The toolhead has a peripheral series of teeth which are engaged by a pinion 15 on a shaft rotatably mounted in a bracket 13 secured to the bearing 1 .by bolts 32 and provided with bushes 13a to receive rods 18 which support a bracket 17 carrying the driving-gear; consisting of a pair of handles 29 driving a chain 31 either through reduction gears 38 or direct by means of the spindle 24. The rods 18 are adjustable in the bushes at 19 to take up slack in the chain, and the bracket 17 has a further support 22 attached to the bearing. In a modification, the shaft 24 may be driven through a clutch and reducing gears from a belt pulley. In a further modification, the bracket 17 is replaced by a two-part fitting 61, 62, Fig. 5, pivoted about a shaft 63 carrying the sprocket for the chain 31. The member 62 is attached by rods 60 to the bracket 17 carrying the driving gear as before, and which is connected by a chain 66 to a second sprocket on the shaft 63 and is supported by legs 70 at a position remote from the trench in which lies the pipe to be cut. The driving gear may be situated on either side of the trench, adjustment of the member 62 being provided for by bolts 68 and a slotted flange 62<a> , and the crank handles may be attached to the shaft 63. Several bearings and tool-heads may be provided for cutting through pipes of widely different size, and the apparatus may be adapted for use in a stock-yard by providing a pedestal for supporting the bearing. When a power drive is used, a petrol or electric motor may be attached to a stand on the bearing, the drive being through a chain, clutch and reducing gear.