Apparatus for use in the Manufacture of Tea and Breakfast Cups, Egg-cups, Basins, Mugs, and the like Articles of Pottery.

摘要

18,012. Brookes, E. Dec. 24. Pottery, throwing and turning.-Relates to a lathe and tools for operating on cups, eggcups, mugs, &c. in a semi-plastic condition previous to baking, to true them up if made in two parts, i.e. put the two parts correctly into line, cut or trim the edges, and smooth the seams. The headstock 3, Fig. 1, has a short shaft 5, but the tailstock 4 is provided with a long sliding shaft 6, and the article (shown as an egg-cup) is held by wooden chucks 32, 33, for base and body, on the opposing ends of the shafts. Suitable axial pressure is normally applied by a weight 18 hanging from an extension bar 14; but the long shaft can be drawn away to remove or insert an article by means of a cord 19 and treadle, or by the handles 72, 73. The chucks are turned from blocks which are fastened by screws 31 to nuts 30, which screw on the reducec ends 28 of the shafts, and the turning may be done on the same lathe after putting a pulley on the headstock shaft. The chuck on the long shaft is divided into a head 33 and body 34, and the head is carried by a central tube 36, which fits a central pin 29 extending from the shaft and is subject to a spring. As shown to a larger scale in Fig. 4, the tool-holders 56 &c. are carried by a rock-shaft 48 in an overhanging slide 40 attached to a foot 41 resting on the bed 1, Fig. 1. The holder 56 is provided on one side with a blade 57 for cutting off the superfluous material of the base of the article, and with a tool 58 for rounding the edge, whilst on the other side projects a piece of bent spring wire 62 for smoothing and filling up the seam of the stem of the egg-cup. The holder 63 carries a blade 64 for cutting down the top edge of the article. The holder 65 bears a guide 68 and longitudinal slide 67, carrying a tool 66 for rounding the top edge, which ic normally kept to the right by a spring 69. Preparatory to inserting the article, the tools, normally cocked clear of the axis by a spring 60 pulling the tail 59 of the holder 56, are depressed by rocking a hand-lever 53, which bears against a pin 50 on a collar 49. When the article is properly rotating, the tools are allowed to rise again by the reverse movement of the lever till a lug on the collar encounters a stop. The radial tools have then done their work, and the edging-tool 66 is in its line of action, whereupon a slight further depression of the lever 53 brings a wedge 70 thereon against the free end of the slide 67 to push the tool to the article. The mould, Fig. 11, in which the articles to be so treated are made, has a splayed extension 71 producing a corresponding part which is sheared off the article.