359,039. Planing-machines. LENTZ, G. W., 2610, 7th Street, South West, Canton, Ohio, U.S.A. July 17, 1930, No. 21703. [Class 83 (iii).] A machine for removing surface defects from rolling-mill products comprises a carriage 13 moving longitudinally of the work-bed and a chip-removing tool mounted on the carriage for rotational adjustment about a horizontal transverse axis, the tool being movable along the transverse axis independently of its rotational and longitudinal movements. The bed has a work-supporting surface 15 on which the billet 121 is secured by a clamp 120, and the carriage 13 is movable along ways located at the front and rear respectively of the bed, the front of the carriage being provided with aligned slide members 14a, 14b, which slide on the front guide-way and also bear at 17a, 17b against the under surface of the work-support 15. Feed movement of the carriage is effected by means of a screw 20 which engages a nut 18 and is driven from a reversing electric motor 23 through reduction gearing 24. The tool head carries a vertical slide 25 guided by means of diagonally-opposed corner guides 27, 27<1>, the former guide being formed in a member 27a which is adjustable by means of a screw 27c. The vertical slide is operated by means of two nuts 28, 28<1> which have threads of opposite hands, and which coact with corresponding screws 29, 29<1> driven in opposite directions from a reversing motor 35 through bevel gearing 35a and worm gearing 36a, 36a<1>. The vertical slide carries the tool spindle which is slidable in a bearing 38 and is rotated from an electric motor 53 through gearing 52 and worm gearing 50, 51. The tool spindle may be traversed in the bearing 38 to move the tools laterally of the work by means of a rockbar 40 which is connected at 42 to the tool spindle and is operated through gearing 45 from a handwheel 48 on the front of the machine. The toolspindle carries a detachable head 55 provided with a number of inclined tool-receiving grooves 57, the tools 61 being arranged to support each other mutually as shown in Fig. 9, and being secured by clamping discs 63, each of which secures one side of two adjacent tools. The parts 60 of the tool head are arranged to support the tools close to the cutting edges which may be shaped to make a gouging cut in the work. The motors 23, 35, 53 are controlled by reversing controllers 65, 66 and non-reversing controller 67 respectively, the controllers being associated with corresponding switches 65a, 66a, 67a respectively. The controllers are all actuated from a single handle 69 which is mounted on a plate 68a. The handle is pivoted in a yoke 70 on a shaft 70a and rocking movement of the handle about the shaft 70a is transmitted through lever mechanism to the arm 67<1> of the controller 67 which controls the motor 53 driving the tool spindle, which rotates in a clock. wise direction, Fig. 1. The yoke 70 is itself mounted so that the control handle may also be rocked in a plane parallel to the plate 68a. This movement is transmitted through links 72, 73 to the arm 651 of the controller 65 of the longitudinal feed motor 23, the direction of the feed being arranged to correspond with the direction of the movement of the handle 69 from its normal position. A stop 69b prevents movement of the handle to start the tool motor when the table is moving in the return direction. The handle portion 69a is secured to a rod which passes through a sleeve 69e and at its lower end is bent up to engage a slot in a bell crank 75 connected to the arm 66<1> of the controller 66 of the tool-elevating motor. The upward or downward movement of the handle 69a is thus arranged to produce corresponding movement of the tool head. In order to convey power to the machine two sets of stationary three-phase conductors 100, 100<1> are mounted at the back of the machine and a distributing panel on the carriage 13 includes sets of sliding conductors. The lines 106 are connected to the longitudinal feed starting- switch 65a. Lines 107, 108 are connected through the corresponding starting-switches to the toolelevating motor 35 and tool-head rotating motor 53 respectively. The longitudinal carriage movements may be limited by switches 109, 109<1>, Fig. 16, and the elevating movement by a similar switch 110. In operation, to remove a defect 122 in the billet the tool-head may be lowered into position and rotated by its motor so that one tool makes a gouging cut to its full depth, Fig. 7. If the defect is of some length the carriage is now translated while the tool remains stationary until the defect is removed whereupon the carriage movement is stopped and the tool again rotated clear of the work, Fig. 9, thereby positioning another tool for the succeeding cut. If a number of defects disposed laterally on the billet are present the tool is arranged to rotate at such speed that by manipulation of the handle 48 the operator is enabled to move the tool axially in the intervals between the engagement of successive tools with the work thereby making a series of cuts across the work as shown in Fig. 18.