Improvements in and relating to Machines for Threading Pipes and the like

21,487. Borden, B., and Neracher, W. A. Oct. 6. Screwing. - Relates to machines of the kind described in Specification No. 22,832, A.D. 1901, for screwing pipes, the dies of the machine described being allowed to take the position of the pipe by reason of the machine being hinged on a horizontal pivot, thus assuring alignment, and preventing undue strain on the dies. Fig. 1 shows a side elevation of the machine. The ring frame 1, to which the tubular portion 6 is attached, has a projecting arm 2 with parts 5 which receive a collar 5. The spindle 3 passes through this collar and carries the pinion 4. On the part 6 is mounted a sleeve 16, shown in Fig. 3, lined with soft metal 20 and provided with felt washers 21, and attached to the wheel 17 and die-holder 13. The guidescrew 18 is attached to this sleeve. To the ring frame are attached horizontal arms 8 carrying the screw blocks 9, and the frame is hinged on a horizontal pivot 25 mounted on the base-plate 24 which may be carried on legs or fixed to a bench. A stop 26 limits the movement of the screwing- apparatus in one direction. The pipe is passed through the part 6, and held by the grip-screws 7, shown in Fig. 2, and the dies 14. The wheel 17 and the parts attached are rotated by the pinion 4, and the sleeve 16 is carried along the part 6 by means of the fixed screw blocks 9 gearing with the screw 18. These blocks, which are slotted and held by the spring 12, as shown in Fig. 4, may be pulled out of engagement with the screw 18, and the sleeve and the parts attached, slid back to the starting position on the part 6. The collar 5 prevents the wheel 17 from going too far.