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Knight's Mechanical Encyclopedia (ed. Knight), M. (search)
East London Works in 1850 from Mr. Wicksteed's evidence63.8 Engines at the same works before the use of the Cornish engines26.9 Average duty of Cornish engines (Lean, 1854）53.7 Duty of best engine, from Lean, 185477.0 Duty of Cornish engine (Browne, 1855）69.7 Duty of best engine, from Browne, 1855101.4 Pittsburg high-pressure non-condensing engines, 1852: — Upper Water-Works19.9 Lower Water-Works19.1 Allegheny City19.2 Detroit17.3 To which may be added, — Worthington duplBrowne, 1855101.4 Pittsburg high-pressure non-condensing engines, 1852: — Upper Water-Works19.9 Lower Water-Works19.1 Allegheny City19.2 Detroit17.3 To which may be added, — Worthington duplex engine, Newark, N. J.76.6 Brooklyn, N. Y., double-acting beam, No. 160.1 Brooklyn, N. Y., double-acting beam, No. 3.72.0 Philadelphia, Spring Garden, Cornish58.9 Belleville, Jersey City, Cornish62.8 Hartford, Conn.; crank. Mean of three experiments61.7 Cambridge, Mass.; double-cylinder. (Mean)67.2 In considering the above, it must be recollected that the quality of coal varies, and the bushel may vary in weight; calculations have unfortunately been made at 94, 100, and 112 po
Knight's Mechanical Encyclopedia (ed. Knight), P. (search)
is the passage by which the water enters and leaves the pump-chamber. Fig. 3976 shows propellers with paddles. F is a form of propeller whose floats are carried on the ends of levers, which lift them out of the water on the completion of their stroke, at the same time dropping into the water the corresponding set at the other end of the compound lever. G H are forms of propellers in which the floats are carried on endless chains, which pass over wheels propelled by the engine. See Browne's Treatise on the screw-propeller, London, 1867: Burgh's Modern screw propulsion, London, 1869. See under the following heads:— Archimedean-screw propeller.Propeller-engine. Auxiliary screw.Propeller-wheel. Duck's-foot propeller.Rack and pinion propeller. Elastic propeller.Rail and traversing-wheel pro- Endless-chain propeller.peller. Fish-tail propeller.Reciprocating propeller. Hydraulic propeller.Rope-traction propeller. Nautilus-propeller.Screw-propeller. Oar.Spike-wheel pro
Knight's Mechanical Encyclopedia (ed. Knight), R. (search)
r rule. A small spirit-level is set into one of the legs, and being provided with a pivoted branch folding into a cavity in the other leg, the rule may be used as a clinometer or slope level; a plumb, square, bevel, protractor, or T square; in combination with a straight edge, as a parallel ruler, and also for approximately determining hights and distances trigonometrically. Abroad to find out one to engrave my tables upon my new sliding rule with silver plates, it being so small, that Browne, that made it, cannot get one to do it. So I got Cocker [the celebrated arithmetician, Ob. 1679], the famous writing master, to do it, and I set an hour by him, to see him design it all. — Pepys's Diary, 1664. Rules. Some rules have a slider in one leg; in Gunter's scale this is graduated and engraved with figures, enabling various simple computations to be made mechanically. When Dalton (who died in 1844, aet. 78) made known his discovery of the theory of chemical equivalents, Dr.
Knight's Mechanical Encyclopedia (ed. Knight), S. (search)
e. The Icelandic side-saddles, like those of some other nations, resemble an ordinary chair-seat with a foot-piece, as in the annexed cut from a drawing by J. Ross Browne. Icelandic side-saddle. The Prussian cavalry-saddle has a wooden tree in two parts, attached at the ends by cast-iron forks, forming a high pommel and can. 3, 1871. 117,358WolfingerJuly 25, 1871. 3. Covers. (continued). No.Name.Date. (Reissue.)4,527WheatAug. 22, 1871. 120,085NauenOct. 17, 1871. 123,673BrowneFeb. 13, 1872. 126,956HeckelMay 21, 1872. 127,244JunettMay 28, 1872. 128,833WheelerJuly 9, 1872. 130,072ReedJuly 30, 1872. 131,101HughesSept. 3, 1872. 131,15kets. 138,831WolfMay 13, 1873. 6. Work-Holders. 115,288EddyMay 30, 1871. 146,110TurnerDec. 30, 1873. 7. Aprons and Guards. 130,339TowerAug. 6, 1872. 136,410BrowneMar. 4, 1873. 8. Chairs. No.Name.Date. 140,362GrayJuly 1, 1873. 9. Casters. 42,754DodgeMay 17, 1864. 48,852StoopsJuly 18, 1865. 50,402StoopsOct. 10, 1865.