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Knight's Mechanical Encyclopedia (ed. Knight), A. (search)
maintain their places, and protect, or partially so, the side of the ship. Jones's armor-plating. Jones's Defensive Armor for Land and Water Batteries, April 15, 1862. In this invention the armor-plates have edge and intermediate flanges, and are placed in two tiers having intermediate cushions between them; they rest against foundation — cushions, the whole being bolted together and to the casemate or side of the vessel by bolts, which are provided with elastic washercushions. Callender and Northrup's armor. Ballard's armor. Callender and North- Rup's Defensive Armor, May 27, 1862, is composed of ribbed plates which are fastened to interior concave stringers by bolts passing through the stringers and into metallic tubes between them; each plate has a lap at its edge to fit the corresponding edge of the next plate, to which it is riveted. The nuts are on the outside. Ballard's armor, June 24, 1862, consists of a series of inner iron ribs A A, with interposed wo
Knight's Mechanical Encyclopedia (ed. Knight), G. (search)
hose working them. For the latter purpose, besides mantelets and shields, arrangements have been made for rotating the turret in which the gun is mounted so as to cover the embrasure; depressing the gun during loading below the embrasure, etc. For counterpoise carriages see: — Brewer's gun-carriage, 1870, is supported on a platform which is supported by levers within a curb, and a weight suspended from the ends of the levers counterpoises the gun, carriage, chassis, and platform. Callender and Northrup, 1864, have a platform supported by a piston in an air-cylinder beneath. Eads (1865, 1869, and 1871) causes the recoil of the gun to depress it backwardly and downwardly, it being poised on its trunnions on the end of an arm which oscillates in an are. As the gun descends, a piston traverses in a cylinder, compressing air therein, and the elasticity of the air assists in restoring the gun to its position when the loading is complete. Coughlan, 1870, has a cogged segment