Patent GB-344661-A (GB)
Title: Improvements in or relating to machines for finishing glass articles
IPC: C03B33/085
Filed: 1930-03-03
Abstract: 344,661. Glass manufacture. TRIGGS, W. W., 57, Lincoln's Inn Fields, London.- (Libbey Glass Manufacturing Co. ; Ash Street, Toledo, Ohio.) March 3,1930, No. 6978. [Class 56.] Shaping glassware after formation.-Relates to a rotary machine for severing glass by burning and for finishing the severed edges, particularly for burning- off the moils and finishing the edges of blown tumblers. According to the invention, means are provided for moving a chuck relatively to the burner that operates on the article held in the chuck, and means for operating automatically the burner when the chuck and burner are brought together, the operation of the burner being dependent, however, on the presence of an article in the chuck. The machine comprises a central drum 10 supporting a carrier member 12 which is rotated by a motor through a hollow shaft 11 within the drum. A number of vertical bearings 15 are secured to the carrier 12, and sleeves 16 are journalled in the bearings. A gear wheel 17, mounted loosely on each of the bearings, is engaged by a stationary chain 18 which passes around the machine and engages all the gears except the one that is in the position for discharging the finished article, so that the gears are rotated as the carrier 12 rotates. Each gear 17 is toothed on its upper side and is adapted to mesh with a collar 20 secured to the upper end of the sleeve 16, as shown in Fig. 2. A vacuum-operated chuck 21, which may be of the type described in Specification 332,474, [Class 56, Glass], is secured to the lower end of each sleeve 16, and a pipe 22, which extends upwards through the sleeve, is connected by a hose 23 to a valve casing 24. The sleeve is raised and lowered by a lever 31 pivoted on the carrier 12 and carrying a roller 35 which runs on a cam 36 secured to the drum 10. A burner 28 is mounted on an adjustable bracket 25 beneath each chuck and directs an annular flame towards an article held in the chuck. A gas chamber 38 is supplied with gas through the hollow shaft 11 and is connected by a series of pipes 39 with the burners, a valve 40 being fitted in each pipe. The valve is controlled by a stem 41 operated by a lug 42 on the lever 31. Each of the valves 24 is connected by a pipe 45, and a chamber 46 in the carrier 12, to a vacuum chamber 47 in the drum 10. A pipe 49 supplies oxygen to a chamber 50 mounted on the chamber 38, and the chamber 50 is connected by pipes 51 to the burners. A valve 52, Fig. 4, fitted in each pipe 51, is actuated by a lever 61 which is rocked by a fixed cam 95. The lever 61 is connected by a link 63 to the short arm 65 of a pivoted trip member 67 lying within the burner 28. The lever 61 also operates the vacuum valve 24 through a grooved wheel 71 in a stem 72. This stem projects from a slide 73 movable vertically on a guide mounted on the carrier 12. A spring 86, surrounding the rod of the valve 24 normally depresses the valve and raises the slide 73 to the upper limit of its travel, but the slide is lowered if the wheel 71 makes contact with cams 92 surrounding the drum 10. A vertical post 96 serves as an anchorage for the chain 18 and also supports a rotary take-off device consisting of a number of receivers 98 carried by a star wheel 97. In using the machine, a tumbler with the moil attached is placed in a chuck and is held in place by suction. As the machine rotates, the cam 36 lowers the chuck until the moil passes through the burner and the desired line of severance is heated by the flames. The moil moves the trip 67 and allows the passage of oxygen through the valve 52. If the chuck does not contain a tumbler, the trip is not actuated and oxygen is not supplied to the burner. The lowering of the chuck by the lever 31 also opens the valve 40 and turns on the supply of gas to the burner. If a tumbler is not in the chuck and the trip 67 is not actuated, the wheel 71 remains in the position shown in Fig. 4 and is depressed by the cam 92, this raising the rod 81 and closing the vacuum pipe so that the gas flames are not drawn into the chuck. The rotation of the carrier 12 causes the chucks to rotate, and the moils are burnt off the tumblers by the flames. After a moil drops off, the chuck is raised to the position shown in Fig. 4, and the disengagement of the gears 17, 20 stops the rotation of the chuck. At the same time, the trip 67 is restored to the position shown by the rocking of the lever 61 by a cam 95. The finished tumbler is now discharged on to a receiver 98 through the closing of the vacuum valve by the lowering of the wheel 71 by a cam 92.