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Knight's Mechanical Encyclopedia (ed. Knight), A. (search)
,000 tons or less, is about 1 cwt. for each 20 tons measurement, or .0025 of the tonnage. Various improvements have been proposed upon the ordinary anchor, of which the most prominent are Rodgers's, Trotman's, and its modifications, Isaacs's and Lenox's. Trotman's anchor. In Trotman's anchor the arms are passed through the shank, which is slotted, and are held by a bolt, thus bringing the upper arm and fluke down on the shank, and allowing the lower one to penetrate deeper when the anchome. Isaacs's anchor. Isaacs's anchor has a flat bar of iron from palm to palm, which passes the shank elliptically on each side, and from each end of the stock to the midlength of the 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