GB166819A - A machine for ornamenting glass articles, such as tumblers and the like - Google Patents

Abstract

166,819. Page, S. E., (Greer, J. B.). July 17, 1920. No Patent granted (Sealing fee not paid). Disc apparatus.-A machine for ornamenting glass-ware by grinding has a series of mechanisms which give an intermittent step-by-step rotation to a tumbler &c., while grinding-wheels are automatically moved towards and cut the glass when it is held at rest. Fig. 3 is a rear view of the machine, Fig. 4 is a side elevation with one of the sides removed and Figs. 7, and 9 show details of the feeler and slide mechanism. The chuck, which comprises two sets of spring-adjusted radial fingers 47, 48, Fige. 3, 4 and 11, each surrounded by rubber bands, is mounted to rotate on an inclined hollow shaft 18. For placing a tumbler in position on the chuck, the fingers 47, 48 are first retracted by pressure on a knob 44 of a slidable bar 41 within the shaft 18 this bar carrying conical members 52, 59 normally holding the radial fingers extended by the action of springs 43, 57. The shaft 18 is given a step-by-step motion from a cam C through a rocking-shaft lever 23, a slide and pawl 20. and a ratchet-wheel 19, the cam-shaft 16 being driven through worm gearing by the main belt-driven shaft 6. The grinding-wheels A, B, on belt-driven shafts 61 mounted in sliding blocks 63, 64, are moved towards and away from the glass by a cam-groove in the cam-wheel C, which, through links 81 and friction devices 79, imparts a rocking motion to side shafts 70. This motion is transmitted to slide the grinding-wheel shafts towards the glass by links 72, 73, Figs. 3 and 9. and auxiliary shafts 75 slidably mounted in sliding blocks 63, 64. Sliding blocks 83, Figs. 7 and 8, are mounted in adjacent slides and are provided with a feeler 84 to limit the advance of the grinding-wheels, the feelers being moved by rocking the shafts 75 far enough to allow them to touch the glass. A restraining-screw 88 on each block 63, 64 is then set to engage a projection 86 on the feeler slide 83 to prevent the grinding-wheel from cutting the glass too deeply. The feeler slide 83 is temporarily locked when the chuck is at rest by a cam-operated locking-device. To limit the amount of withdrawal of each grinding-wheel, a stop-wedge-piece 107 is applied to an extension 96 of the arm 72, but the cam movement is able to continue on account of the friction drive. To cut a number of ornamental circular bands on the glass, the chuck shaft is automatically slid axially by a, spring-pressed bell-crank lever 28. A stepped bar 32 holds the chuck shaft in position against the spring-pressed lever 28 by bearing against a flanged wheel 34 fixed on the shaft. After each revolution, the cam 40 on the wheel 34 presses the stepped bar 32 upwards against a spring 34a and allows the spring-pressed lever 28 to move the whole chuck shaft axially a distance of one step until the wheel 28 engages the next step of the bar 32. On completion of the last cut, a trip-finger on the chuck shaft operates a lever, which moves the starting-lever 12 to disengage the clutch 14 on the main shaft 6.