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Knight's Mechanical Encyclopedia (ed. Knight), A. (search)
71.French,1869. Murfey,1870. 7. For forming a radiating surface, as in gasstoves, fire-grates, and broilers. 8. In porcelain manufactures, of teeth especially, placed on the side of a muffle to isolate the biscuit from the slide, to prevent its becoming attached thereto in the process of baking. 9. As an anti-friction composition for journalbearings, pistons, etc. British patent, 2048 of 1858.Devlin, 1860. Peters, 1862.Devlin, 1865. Botticher: with soapstone and cotton,1864. Kelly: with graphite and iron-filings,1870. Johns: with caoutchouc,1868. 10. For molded articles:Whitmarsh, 1868. 11. For roofing cement:Johns, 1868. Kidwell, 1868.Moore, 1868. 12. Flooring cement:Whitmarsh, 1867. 13. Electric insulator:English patent, 362 of 1865. 14. In refrigerators:Hyatt, 1870. 15. In ink:Smilie, 1863. 16. For paper:English patent, 1413 of 1853. Johns, 1868. Schaeffer on Paper, an old German book, describes asbestus paper, and contains a specimen. 17.
Knight's Mechanical Encyclopedia (ed. Knight), C. (search)
nd advanced by a screw. A mode of making combs with economy of material was invented by Ricketts, London, some years since, and has become common. A slip, a little wider than a comb, is placed in a machine which has a descending cutter of peculiar conformation adapted to cut through the tortoise-shell or horn by a series of tapering cuts which form the outlines of the teeth of a pair of combs, as in the figure (w), the teeth of one comb occupying the interdental spaces of the other. Kelly's Machine for making parted combs has a bed-plate p which is secured by screws to a bench; from the bed-plate rise standards u which support an axle a turned by a winch h. On the axle is a crank which communicates motion by the collar c to the arm b, to whose lower side the cutter is attached. As the bar works up and down in the guide l, the cutter makes its incisions in the tortoise-shell t, which is intermittingly moved so as to be advanced one notch between each descent of the cutter.
Knight's Mechanical Encyclopedia (ed. Knight), I. (search)
hat similar operations for burning the carbon of pig-iron and eliminating other impurities, are considered under those heads. See also decarbonizing-furnace; reducing-furnace; malleable iron; Bessemer process; forge, etc. See list under metallurgy. Steel processes are considered under steel. See also Bessemer process; convertor; cementation-furnace, etc. A process for decarbonizing molten cast-iron by applying an air-blast in the hearth of a blast-furnace was invented by C. Shunk. Kelly patented in the United States, in 1857, a mode of decarbonizing molten crude cast-iron by running it into a cupola or vessel, separate from that in which it was melted, and blowing through it from the bottom a blast of air, so as to burn out the excess of carbon, — the blast being strong enough to furnish rapid combustion of the carbon, and thereby retain the temperature and fluidity of the molten metal until sufficiently refined, without the use of other fuel. Bessemer worked as an origi
Knight's Mechanical Encyclopedia (ed. Knight), S. (search)
two stirrup-bars are added and iron staples for the valise, if required. The kinds are numerous, according to the purpose, taste, or fashion of saddles. We may enumerate— Spanish.McClellan. Half-Spanish.Somerset. English.Jockey, etc. Side. The tree is the basis of the saddle, and determines its shape, as well as to a large extent its efficiency. It is usually of beech, strengthened by iron plates: the gullet-plates under the head, plates over the head and under the cantle. Kelly, 1810, made saddle-trees of whalebone lined in part with metal. Harness saddle-tree. Thompson, 1825, made a saddletree of steel or iron. Bielefeld, in 1855, one principally of guttaper-cha. Brooman, 1865, of wood and leather. Author man, in 1865, one of papier mache and horsehair combined and molded. As a means of making saddles adjustable to fit different horses, a Mr. Smith, in 1786, made the fore points of steel springs with gulletplates set out or narrowed by setscrews. Dun
Knight's Mechanical Encyclopedia (ed. Knight), T. (search)
d to rotate a series of gear-wheels which operate the indicator. The stile can only rotate in one direction, and has a locking device controlled by a foot-lever, so that the collector may prevent the passage of more than one person at a time. Kelly turn-table, with iron frame. Turn-ta′ble. 1. (Railroad-engineering.) A platform which rotates in a horizontal plane, and is used for shifting rolling stock from one line of rails to another. Devices common to all are the plat- form, wher surface; rollers on which it turns, gearing for rotating it, a central pivot on which it rotates, a circular track on which the rollers move, and solid foundations for this track and for the central pivot. Turn-table, with wooden frame. Kelly's turn-table (Fig. 6809) is centrally supported on a series of frusto-conical rollers turning on arms radially projecting from a collar, which revolves around the axis of the table. The apexes of the cones would, if they were complete, meet at a