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Knight's Mechanical Encyclopedia (ed. Knight), A. (search)
ces of the British Board of Admiralty, to determine the comparative general merits of various descriptions of anchors, their comparative merits were decided to be as follows, the Admiralty anchor being taken as unity: — Trotman1.28Honibal (or Porter）1.09 Rodgers1.26Aylen1.09 Mitcheson1.20Admiralty1.00 Lenox1.13Isaacs.73 Notwithstanding the numerous recent modifications claiming to be improvements, an anchor differing little from the oldfashioned type, excepting that even the very larghe shank are fixed two other bars to prevent fouling. Lenox's anchor. Porter's anchor, or Honibal's as it is sometimes called from the purchaser of the right, is very similar to Trotman's (which see), the latter being an improvement upon Porter's, with some modifications in the shape of the flukes and their horns. Lenox's improvement (1832-39) consisted in an improved mode of welding, and in rounding off the sharp edges and lines; also in reducing the size of the palms, the object bein
Knight's Mechanical Encyclopedia (ed. Knight), B. (search)
s a chisel having a tang fitting into a hole in the anvil. (See anvil.) When used upon hot iron, the chisel has a withe of hazel or other soft wood wound around it. Black′smiths tools. See the following: — Anvil.Horseshoe nail. Barnacles.Horseshoe nail-machine. Bar-shoe.Horseshoe vise. Battery-forge.Jam-weld. Beak.Jumping. Bellows.Lunette. Black-workMandrel. Bore.Miter-iron. Butteris.Monkey. Calking-anvil.Oliver. Calking-tongs.Ox-shoe. Calking-tools.Pliers. Calking-vise.Porter. Calk-sharpener.Prick-punch. Calk-swage.Pritchel. Cautery.Punch. Chisel.Riveting-tools. Clincher.Rounding-tool. Collar-tool.Searing-iron. Coupler.Slake-trough. Creaser.Sledge. Cutting-shoe.Snap-head. Die.Stifle-shoe. Drift.Stock. Foot-rest.Stock and dies. Forge.Stocks. Forge, PortableStriker. Forging-machine.Swage. Fuller.Swage-block. Fullering-tool.Tap. Hammer.Tilt. Hand-hook.Tilt-hammer. Hardy.Tire-bender. Hoof-spreader.Tire-heater. Horse-holder.Tire-shrinker. Horses
Knight's Mechanical Encyclopedia (ed. Knight), F. (search)
s behind a Barrel. 183J. W. CochranApr. 28. 1837. 188J. W. CochranApr. 29, 1837. 603Haviland and BennettFeb. 15, 1838. 677H. and C. DanielsApr. 5, 1838. 7,218H. IversonMar. 28, 1850. 2. Chambered Cylinder revolving on Vertical Axis behind a Barrd.—Continued. No.Name.Date. 12.235E. H. GrahamJan. 16, 1855. 14,780S. F. StantonApr. 29, 1856. 15,734E. H. GrahamSept. 16, 1856. 16,477H. GenhartJan. 27, 1857. 3. Cylinder revolving on Horizontal Axis behind a Barrel. 8.210P. W. PorterJuly 8, 1851. 10,944E. H. GrahamMay 16, 1854. 11,917W. WrightNov. 7, 1854. 4. Revolving Hammer acting on several Stationary Barrels. 6,960C. SharpsDec 18, 1849. 17,386W. W. MarstonMay 26, 1857. 22,753C. SharpsJan. 25, 1859. 42,698E. T. StarrMay 10, 1864. For illustrations of revolvers, see under the head revolver. Fire-ar′row. An arrow carrying a combustible for incendiary purposes. Fire-back. The back-wall of a furnace or fireplace. It is frequently of fire-
Knight's Mechanical Encyclopedia (ed. Knight), M. (search)
contrivance could a broadside vessel be enabled to use much heavier guns than those now mounted. There remains to the monitors the advantages of lighter draft, choice of guns from the heaviest to the lightest, defensibility, and direction of fire around the whole circle; consequently the ability to carry a heavy battery into the least depth of water, with equal power of offense and defense in any direction, and that with half the number of guns carried in broadside by another vessel. Admiral Porter, after a lengthened experience with all sorts of iron and wooden vessels in action under almost all possible circumstances, gave his opinion that the monitors built on the Western rivers were the most powerful vessels of war ever launched. He says: The first monitor was a perfect success, and capable of defeating anything that then floated. The one first completed at Cincinnati, in 1864, he thought, could commence at Cairo and, going down the river, destroy everything we have on these
Knight's Mechanical Encyclopedia (ed. Knight), P. (search)
A. （Surgical.) An instrument with a ring and handle, and used for applying a moxa to the skin. Porte-noeud. （Surgical.) An instrument for carrying a ligature around the base or pedicle of a tumor. Porte-pi-erre′. （Surgical.) A handle with sliding-jaws to hold a stick of luna-caustic. Porte-pol′ish-er. A dentist's instrument by which a polishing stick or slip is held and applied. It is like a forceps, and forms a handle for the corundum-points or other abradant. Porter. 1. (Forging.) a. A long bar of iron attached in continuation of the axis of a heavy forging, whereby it is guided beneath the hammer or into the furnace, being suspended by chains from a crane above. A cross lever fixed to the porter is the means of rotating the forging beneath the hammer. b. A smaller bar from whose end an article is forged, as a knife-blade, for instance. 2. (Wearing.) A weaver's term in Scotland for twenty splits in plain work. In England it is called a
Knight's Mechanical Encyclopedia (ed. Knight), R. (search)
, for the entire roadsystem of the Park. Central Park road-roller. Steam roadroll-ers have now been generally introduced with great success. Aveling and Porter's (Fig. 4363) has two driving-rollers in front, one of which turns loose on the axle to enable the machine to turn short curves. The driving-axle is rotated by cn gearing from the crankshaft, and similar gearing is used for connecting the steering-wheel with the two large rollers at the rear of the machine. Aveling and Porter's road-roller. These are journaled in a turn-table, which may be rotated horizontally by the steering-wheel to guide the machine in any direction. It is built of four sizes, weighing respectively 15, 20, 25, and 30 tons. The steering-wheels of a differently arranged roller, made by Aveling and Porter (Fig. 4364), are somewhat conical, and are mounted on an axle, whose ends are bent downward, so that the wheels are close together at their lower edges, while between their upper edge
Knight's Mechanical Encyclopedia (ed. Knight), S. (search)
ersDec. 15, 1868. 86,057CanfieldJan. 19, 1869. 86,695RussellFeb. 9, 1869. 93,354FootMay 25, 1869. 96,160SmithOct. 26, 1869. 99,481RudolphFeb. 1, 1870. 99,704PorterFeb. 8, 1870. 103,050KeableMay 17, 1870. 109,705YoungNov. 29, 1870. 117,101NeckerJuly 18, 1871. 124,808GoodesMar. 19, 1872. 125,301JohnsonApr. 2, 1872. 126,9June 9, 1868. 78,818ParhamJune 9, 1868. 79,037WaterburyJune 16, 1868. 80,345FrenchJuly 28, 1868. 81,191MeyerAug. 18, 1868. 81,328BarclayAug. 25, 1868. 83,406PorterOct. 27, 1868. 85,633BarnesJan. 5, 1869. 86,163JonesJan. 26, 1869. 86,164JonesJan. 26. 1869. (Reissue.)3,281GuinnessFeb. 2, 1869. 87,559GirdMar. 9, 1869. ehfussMar. 18, 1873. 137,199Hoppe et al.Mar. 25, 1873. 138,902Lewis et al.May 13, 1873. 140,787MeloneJuly 15, 1873. 141,791Hirons et al.Aug. 12, 1873. 144,864PorterNov. 25, 1873. 145,215Koch et al.Dec. 2, 1873. 146,466MoltzJan. 13, 1874. 146,644BlackJan. 20, 1874. 148,336TrueMar. 10, 1874. 1. （b.) Shuttles vibrate (c
Knight's Mechanical Encyclopedia (ed. Knight), T. (search)
n she and her crew disappeared forever from all human knowledge. Of late, however, it is not considered as an absolute prerequisite to an efficient torpedo-boat that she should be capable of being entirely submerged when making an attack. Admiral Porter's system provides vessels of sufficient power to resist the fire of an enemy, and attack openly when necessary. See Fig. 6563. The destruction of the rebel ram Albemarle, at Plymouth, N. C., October 27, 1864, was accomplished by the use ohot seemed to go crashing through my boat, and a dense mass of water rushed in from the torpedo, filling the launch and completely disabling her. The Albemarle sunk at her moorings. Lieutenant Cushing and one of his crew escaped by swimming. Porter torpedo-boat. Just before the close of the war an attack was made, in the James River, on the merchant-vessels which had brought supplies to Grant's army, by the Confederate fleet of three iron-clad rams and seven gunboats, all armed with tor