Patent GB-412093-A (GB)
Title: Improvements in machines for guiding cutting and welding burners
IPC: D06F79/04
Filed: 1933-10-30
Abstract: 412,093. Uniting and dividing by fusion. OESTERREICHISCHE AGAWERKE AKT.-GES., 3, Johannesgasse, Vienna. Oct. 30, 1933, Nos. 30103 and 30104. Convention dates, Oct. 31, 1932 and May 13, 1933. Addition to 390,636. [Class 83 (iv).] In a machine for guiding cutting and welding burners in which the movement of the burner is effected by a driving wheel, adapted to rock about an axis perpendicular to its axis of rotation, which rolls over the external surface of a rotatable cylinder, as described in the parent Specification, the gear head operating the driving wheel is adapted to be fixed in a guide head firmly attached to the burner holder and adapted to travel over plane surfaces or strip templets, so that the burner may be guided according to either a mark on the work, a drawing or a templet. A carriage for a cutting burner comprises bearing units 1, 2, Fig. 1, running on rails 6, 7 and interconnected by tubes 3-5 which extend beyond the unit 1 to support a casing 14. Through a tube 45, the casing 14 supports a shoe 47 in which is slidable a transverse bearing member 48 carrying an angularly adjustable burner 51. The burner may be raised or lowered by a rack and pinion operated by a hand wheel 46 and be rotated about the axis of the tube 45 by worm gearing actuated by wheels 58. A rotatable cylinder 16 connects the casing 14 to a guiding unit 15, both the casing and the unit being slidable on the tubes 3, 4 through rollers such as 17, Fig. 6, spaced equally around the tube 3 at two spaced points and a pair of rollers 18 in a vertical plane engaging above and below the tube 4. Where the cylinder 16 passes through the bearing unit 1, it is engaged by rollers 21, Fig. 3, having concave peripheries which compel them and a casing 20 in which they are mounted to follow any rotation of the cylinder and thereby rotate a sprocket wheel 22 on the casing 20. The sprocket 22 is connected to another sprocket 24 which drives a bearing wheel 8 adapted, in conjunction with a similar but un-driven wheel to run on the rail 6 and support the major part of the weight of the carriage. At its other side, the carriage is mounted through the bearing unit 2, Fig. 1, on rollers 10, 11 engaging above and below the rail 7, the arrangement providing a three point suspension. A motor 41 on the unit 2, drives a flexible shaft 31 terminating in a bevel gear 32, Fig. 3, mounted in a head piece 30 of a housing 27 adapted to be inserted in and removed from a casing 25 forming part of the bearing unit 1. The gear 32 drives a toothed sleeve 33 meshing with a pinion 34 carrying a worm 35 and the worm drives worm wheels 36 on a pair of inclined shafts 37 provided at their other ends with milled rollers 38. The rollers engage a driving wheel 19 mounted on a bush 26 removable from the housing 27 but rotatable therewith when a handle 29 on a pin 28 secured to the housing is rotated. According to its disposition, the wheel 19 rotates and /or displaces longitudinally the cylinder 16, the former motion moving the carriage along the rails 6, 7 and the latter displacing the burner along the tubes 3, 4. The burner is thus moved along lines marked on the workpiece. If it is to be moved in correspondence to a drawing, the housing 27 and wheel 19 are transferred from the casing 25 to a casing 63 on the guiding unit 15 and the wheel 19 is guided along the drawing. To work to a templet, the bush 26 and wheel 19 are taken off the housing 27, the housing placed in the guiding unit 15, and the milled rollers 38 engaged with the templet.