GB603583A - Improvements in portable power screw cutting machines - Google Patents

Abstract

603,583. Screwing. COOK, E. L. April 14, 1945, No. 9372. [Class 83 (iii)] In a portable pipe-screwing machine comprising a pipe clamp 11, Fig. 6, a die holder 19 threadedly connected at 17 to the pipe clamp casing 10 to give a lead screw feed, and gearing connecting the die holder to a power coupling 70, Fig. 2, worm-type reduction gearing 55, 53<SP>1</SP> is provided between a driving shaft 56 and a driven shaft 42, driving pins 28 connect a gear 30 journalled on the casing to the die holder so as to allow for its axial displacement, and a clutch is fitted to disconnect the driven shaft 42 from a sleeve shaft 50 so that the die holder can be reversely rotated by hand to unscrew it from the work. A portable electric drill, coupled by a detachable socket 71, Fig. 2, drives the worm 55 which engages the worm-wheel 53<SP>1</SP> keyed to the sleeve shaft 50 ; the worm gears are enclosed in an oiltight casing 12 closed by a plate 75. A clutch bar 59, having a spring-pressed detent 63, is pivoted in a slot 49 in the shaft 42 and lies in one or other of the slots 61, 62 to connect the two shafts together, or is aligned with the shafts so that the die holder can be unscrewed from the work. A pinion 41 on the shaft 42 engages internal teeth on the gear 30 which is mounted on roller bearings 33 on the casing and is connected by pins 28 to the die holder 19, in which a die 23 is held by a plate 25.