Patent GB-298479-A (GB)
IPC: B23K7/00
Filed: 1928-10-08
Abstract: 298,479. Eberle, W. Oct. 8, 1927, [Convention date]. Perforating and dividing by fusion. - A portable blowpipe machine for cutting metals has at least two different power-driven movements started and stopped and driven forward and reverse independently of each other and driven from. a single source of power mounted on the machine carriage. The different movements may thus be effected consecutively without interrupting the burner movement. The burner 83 is mounted in a carriage 46 traversable on an arm 45 which is secured to the casing 25 of a carriage frame 1 traversable along rails 3. The carriage frame 1, which carries the driving motor 5, is provided with rollers 2, 114 running on the rails 3 and with a roller 112 for preventing lateral tilting of the frame. The motor casing is pivoted about a vertical axis 5a, and its shaft, which is journaled in a slidable spring-controlled bush in a bearing 9. Fig. 2, carries a friction roller 7 engaging a friction cone 6 connected by chain gear 21 to the hollow shaft 22 and by belt gear 40<1> to a speedometer 13. The roller 7 is adjusted to vary the speed by a screw 17, Fig. 2, rotated by bevel gear 16 from a hand-wheel 14. To effect a longitudinal cut the shaft 22 has a reversing bevel gear 27, 28 slidably adjusted thereon by a fork 26, Fig. 3, connected to a lever 93 which is moved by a handle 98 on a rod 97 to bring either of the gears 27, 28 into mesh with a bevel wheel 29. A neutral position is also provided. The bevel wheel 29 is mounted on a shaft 99 connected by chain gear 31 with a spindle 34, Fig. 2, on which is mounted a swivelling casing 36. The spindle 34 carries also a spur wheel 32 geared at 110 to a spindle 37 carrying a milled roller 38. The casing is controlled by a spring 40 to bring the roller 38 into engagement with one of the rails to effect the traverse of the carriage frame, and is put out of action by a handoperated cam 43 engaging an arm 41 on the casing. In order to effect a transverse cut, the carriage 46, which is guided on the arm 45 by rollers 51, 52, Fig. 5, is traversed by a roller 65 engaging a ledge 69 on the arm 45, the roller being driven by spur gear 63 from a shaft. 59, which is connected by reversing bevel gear 60, 61, 58 to a shaft driven by spur gear 56, 55 from a shaft 54. The shaft 54 is secured to a shaft 47 feathered to and telescoping in the shaft 22. The gears 60. 61 are put into neutral position or into engagement with the gear 58 by a fork 109 operated by a hand lever 73. The roller 65 is held in contact with the ledge 69 by a spring- pressed lever 66, which is pivoted on the shaft 59 and can be withdrawn by a cam on a rod rotated by a handle 70, Fig. 1. The traverse may also be effected by a handle 113 on the shaft 59. In order to effect a circular cut the head 81, in which the burner 83 is radially adjustable, is rotated by worm gear 80, 79 from a shaft connected; by a hand-operated toothed clutch to a spur wheel 76, Fig. 9. The head 81 may also be rotated by a handle 84 on the worm shaft. In order to effect a templet cut the carriage frame 1 and carriage 46 are freed and the drive is obtained by a reversing bevel gear 89, 90, Fig. 9, on the shaft 54, controlled by a hand-operated forked bar 91, and connected to a bevel gear 88, Fig. 5, so as to rotate a head 86 carrying a milled roller 86a. The roller is held in contact with the templet by a spring-pressed counter-roller on the other side thereof. The bar 91 carries a guide rod 150, which is slidable in the carriage and is held in position by a spring-pressed plunger 152 and notches 151. In order to ensure correct meshing of the gears the bar 91 is secured to a sleeve 153 internally threaded to engage the rod 150, which is rotated by a screwdriver inserted in the nick 154. The longitudinal and transverse movements may be stopped automatically. For the former purpose a lever pivoted at 100, Fig. 3, in the carriage frame 1 has an arm 101 connected to the rod 97 and an arm 102 projecting laterally therefrom so as to engage either of a pair of rods 105 connected to blocks 103, Fig. 1. secured in guides 103<a>, 103b on one of the rails 3. The transverse movement is stopped by an abutment 107, adjustable in a groove 106 in the arm 45 and engaged by a lever connected to rod 74 carrying the fork 109. The Specification as open to inspection under Sect. 91 (3) (a) describes a mechanism for effecting a circular cut in which the pinion 75, Fig. 12 (Cancelled), is geared to the spur wheel 76, which is fixed on the worm shaft, through either of the connected gears 160, 161 of a reversing gear 75, 160, 161 mounted in a casing 163 which is moved by a handle 162 about the shaft 54. A neutral position is also provided. The casing is held in adjusted positions by a spring pin engaging one of a number of indentations in the carriage 46. This subject-matter does not appear in the Specification as accepted.