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Knight's Mechanical Encyclopedia (ed. Knight) 10 0 Browse Search
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is method was to form a tunnel or pipe, open at the stern of the vessel, and by means of a pump to force water or air through it into the sea. The reaction thus occasioned would drive the ship forward. The design was put into execution upon a canal, with a boat of considerable size, and worked by pumps by manual labor, but he suggested the employment of a steam-engine, and its application to a vessel of 1,500 tons. The hydraulic propeller of Dr. Allen formed the subject of a patent to David Ramsey, in England, 1738; and Rumsey, of America, 1782. The latter ran a vessel of 50 feet long on the Potomac, and one built on his plan was launched and fitted after his death, and ran on the Thames four miles an hour against wind and tide. Dr. Franklin planned a boat of this kind in 1785, and it has since been tried on the Scheldt, two turbines being used for pumps. Linnaker's hydraulic propeller, 1808, had pumps placed horizontally beneath the bottom of the vessel. The pistons were a
England for devices purposely described with great looseness, for concealment, but which appear to have been paddle-wheels of some kind. In 1690, Papin describes oars fixed to an axis, a pinion on the latter being engaged by a rack on the piston-rod. In 1729, Dr. John Allen patented the hydraulic propeller, forcing water through the stern of the ship at a convenient distance under water. In 1737, Jonathan Hulls patented a steamboat propelled by a paddle-wheel astern. In 1738, David Ramsey obtained a patent in England for a mode of propulsion of vessels by the force of water ejected by a steam-pump. In 1780, Watt suggested the spiral oar to move canal-boats. In 1780, the present arrangement of connecting-rod crank and fly-wheel was patented. In the same year the Marquis de Jouffroy worked a steamboat 140 feet long on the Saone. In 1782, Rumsey propelled a freight-boat on the Potomac by means of the hydraulic propeller. A steam-engine worked a vertical pump amidsh
. 112,531BerryMar. 14, 1871. 115,036Diehl et al.May 23, 1871. 115,151BatesMay 23, 1871. 115,155BentelMay 23, 1871. 116,783Willcox et al.July 4, 1871. 117,459RamseyJuly 25, 1871. 117,526EldridgeAug. 1, 1871. 118,631MoltzAug. 29, 1871. 119,690BleesOct. 10, 1871. 122,401PerkinsJan. 2, 1872. 122,673SmythJan. 9, 1872. 123,156,624YoungNov. 3, 1874. 2. Braiders. 12,014BoyntonNov. 28, 1854. 26,205RobertsonNov. 22, 1859. 36,847MaddockNov. 4, 1862. 43,355WagenerJune 28, 1864. 44,339RamseySept. 20, 1864. 2. Braiders. (continued). No.Name.Date. 47,171PlanerApr. 4, 1865. 50,157PlanerSept. 26, 1865. 51,247WarthNov. 28, 1865. 54,670BartramMay 15rhaps in the fullness of the meed of praise the claims of others have been not fully regarded. He had the benefit of the previous experiences of Hulls, Jouffroy, Ramsey, Rumsey, Symington, Evans, and Fitch, and the choice of six different modes of propulsion, each of which had been used by one or other of his predecessors. He wa