Patent GB-190719553-A (GB)
Title: Improvements in Wood-working Machinery.
Inventor: WADKIN JOSEPH WILLIAM
Filed: 1907-08-31
Granted: 1908-08-31
Abstract: 19,553. Wadkin, J. W., and King, T. Scott-. Aug. 31. Trenching; moulding ; carving. -In a rotary-cutter wood-working machine for producing core and pattern w o r k, instrument and ammunition trays and cases, ornamentation, geometric cabinet work, carriage and motor body work, and for recessing and profiling and other operations, the cutter is mounted in an overhanging arm which may have either a power or hand feed, and in such a position that the centre of the spindle may be at or below the level of the work operated on. The cutter spindle 3 is driven by gear 15 from a hollow shaft 2 mounted in the overhanging arm c. The shaft 2 is driven in either direction by a belt q passing round a pulley k on the driving-shaft, loose pulleys l, m on the shaft z, and a pulley r on a counterbalanced slide s for maintaining the tension in any position of the arm. In case of breakage of the belt, the arm is supported by a wire v looped through a bracket w and attached to the base x. Either of the pulleys l, m is clutched to the shaft 2 by conical clutch members y, z which are connected by a cotter 5 to a rod 6, which is fixed at its other end by collars 7 to a threaded piece 8 moved longitudinally in a screwed boss 9 by a handle 10, which has clutch jaws 12 engaging similar jaws 11 on the piece 8 and is prevented from travelling by a pin 12a. The handle has an eccentric pin 13 and is held in either of the operating positions of the clutch by a spring plunger 14, which also may have a ridge to engage a slot in the pin in the neutral position. The power-operated traverse of the arm is produced by belts loosely mounted on the pulleys 41, 41, n, o, which may be alternately tensioned by levers 44, 45 mounted on a shaft 46 rocked by a lever 47. The shaft of the pulleys 40, 41 may carry a worm 39 engaging a worm-wheel 38, which also acts as a nut for a fixed screwp. To obtain a hand feed, the screw is rotated by a splined bevelwheel 48 rotated by a pinion 50 on a shaft rotated by a hand-wheel 52 ; the nut in this case is held by the power gear, and the screw in the other form is held by the hand gear, the shaft being fixed by a screw 54. The position of the wheel is shown by an index 53. In a modification, Fig. 9, the arm may be traversed by pulleys 40, 41, loosely mounted on a worm shaft 51 and put into engagement by clutch members 58, 59 on the shaft 51, which is moved longitudinally by a pivoted forked lever 63. For hand feed the shaft 51 is locked to the hand-wheel 52, a double-ended clutch piece and driver 66, Fig. 12, engaging a split ring 67, which is grooved to receive the driver and the bifurcated bevelled end 69 projecting into a space 70 between the bevelled ends of the ring to press the ring against the boss of the wheel. In this case the clutch members 58, 59 are in a neutral position. Longitudinal motion may be given to the spindle by rotating by a handle 16 the part 9 which carries a pinion 17 engaging a rack 18 carried in a sliding rod 19 attached by a cross-head 20, Fig. 8, to the cutter spindle. A fine adjustment may be given by operating the rack by a screw 85 and graduated wheel 21. The handle 16 is held in any position by the engagement of a spring plunger 23 with holes in the dial 79, the plunger being held in its rear position by a pin on the plunger engaging a recess on pulling back the knob and giving a partial turn. To engage and hold the handle 16 in the zero position and in a movable catch-plate automatically, the pin passes through a slot in a sleeve 25 which carries two square pins adapted to engage square holes in a catch-plate fixed on the dial at the zero position, and in a movable catch-plate. Stops are provided on the catch-plates beyond the holes to which the handle 16 is moved when the catches are withdrawn. The pin on the plunger engages a second recess to hold both the plunger and sleeve out of contact. The capstan head is turned round a ring 29 and is fixed in any angular position by a spring pin engaging holes 32 in a graduated dial, the capstan head having a pointer33. The pin is hold in its retracted position by a lever 34 pivoted to it and having an enlargement 35 engaging a cavity on the head. The work-table may consist of an upper rotatable' table on two tables moved at right-angles, the lowest table carrying wheels and being moved along by a fixed rack and pinion on the table. According to the Provisional Specification, the machine may be driven by stepped pulleys, one of which may be moved eccentrically by a lever in relation to the other, and the balancing weight may pass over a pulley at the top of the standard.