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Knight's Mechanical Encyclopedia (ed. Knight), C. (search)
tent obtained in 1857. It has been extensively adopted in the British service. It is built up of layers of wrought-iron bars twisted spirally in reverse directions over a steel core, and bound together by one or more wrought-iron rings shrunk on at a white heat. A peculiar breech-loading mechanism is also used with this gun. See Armstrong gun. In the Ames cannon, a series of compound longitudinal rings are consecutively welded to a concave breech-piece, upon a removable mandrel. Blakeley's cannon is composed of an inner tube, which may be of mild steel, upon which an outer tube of less extensible material, as hard steel, is shrunk. His first English patent was in 1855. The American patent, in which the process here mentioned is described, bears date 1864. Whitworth commenced experimenting about 1855, and his guns underwent a satisfactory test in 1860. The leading peculiarities are a bore which is hexagonal in cross section without grooves, and having a rapid twist; th
Knight's Mechanical Encyclopedia (ed. Knight), R. (search)
was the best on record. The possible individual score was180 The possible six-team score was (6 × 180）1,080 The best individual score (Fulton, American) was168 The American team score was934 The Irish team score was931 The best previous shooting at Wimbledon was 1,204 out of a possible 1,440. Rifled cannon were first successfully employed expansible cups or envelopes of soft metal, which are forced into the grooves in the act of firing, so as to prevent windage; as Parrott's, Blakeley's, etc. 4. Breech-loading guns. In these the projectile has a soft metal coating, which is forced into the grooves in the same way as the leaden bullets of small-arms; e. g. the Prussian and Armstrong's. The grooves of the Armstrong muzzle-loader are made deeper on one side than on the other, as shown in Fig. 4328, a; the deeper part is of uniform depth and connected with the shallower during the Franco-Austrian war in Italy, 1859. The Lancaster gun had, however, been tried to some