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Knight's Mechanical Encyclopedia (ed. Knight), A. (search)
of different media so as to correct the unequal refrangibility of the different rays. The object to be attained is that rays parallel to the axis of the lens or diverging from a point on its axis, after passing through it and suffering refraction at its surface, shall converge to a single point, the true focus. See achromatic lens. A-pol-lon′i-con. A large chamber-organ played by key-boards or by barrels, and exhibited in London some years since. It was constructed by Flight and Robinson in 1817. It had 1,900 pipes, 45 stops, 5 key-boards and 2 barrels. The number of keys acted upon by the cylinders was 250. Apo-me-com′e-ter. An instrument for measuring hights, invented by a Mr. R. Millar, and manufactured in London. The apomecometer is constructed in accordance with the principles which govern the sextant, viz.: As the angles of incidence and reflection are always equal, the rays of an object being thrown on the plane of one mirror are from that reflected to the
Knight's Mechanical Encyclopedia (ed. Knight), B. (search)
Bag-pump. Bag-pump. （Hydraulics.) A form of bellowspump in which the valved disk a, which takes the place of the bucket, is connected with the base of the barrel by an elastic bag distended at intervals by rings. It is described by Dr. Robinson in his Mechanical philosophy. It is much older, however, than this work, and has been invented again and again, from time to time. Bag-reef. （Nautical.) The lowest reef of a sail. Bags. （Porcelain.) The flues in a porcelain ovo the hydrostatic pressure due to the vertical column and to the area of the apertures; for there is no solid surface at the apertures to receive the lateral pressure which acts with full force on the opposite side of the arm. According to Dr. Robinson, this unbalanced pressure is equal to the weight of a column having the orifice for its base, and double the depth of the water in the trunk for its hight. The machine has, for one hundred years, been a favorite subject with writers on dyna<
Knight's Mechanical Encyclopedia (ed. Knight), F. (search)
16, 1869. *111,500L. WheelockJune 31, 1871. *112,563H. J. DrewMar. 14, 1871. *112,564H. J. DrewMar. 14, 1871. *116,642G. R. StetsonJuly 4, 1871. *125,988O. M. RobinsonApr. 23, 1872. 127,873William W. HannahJune 11, 1872. 1. (b.) Withdrawn by Hand by a Thumb or Spring Catch, or by a Handle, and fastened by a Bayonet-CaotDec. 14, 1869. 99,504W. G. WardFeb. 1, 1870. 99,898B. B. HotchkissFeb. 15, 1870. 101,826J. J. CloesApr. 12, 1870. 103,488A. MullerMay 24, 1870. *103,504O. M. RobinsonMay 24, 1870. 104,100K. V. BarnekooJune 14, 1870. 108,836P. SchulerNov. 1, 1870. 108,869H. BerdanNov. 1, 1870. 109,218B. F. JoslynNov. 15, 1870. 109,277F.e complex. The Hebrew, with the Masoretic points, requires about 300 sorts, many differing only by a point, stroke, or angle. The Arabic has quite as many. In Robinson's Hebrew Lexicon, eight or ten Oriental languages appear, and required 3,000 sorts distributed through at least forty cases. Fools′cap. A size of folded wr
Knight's Mechanical Encyclopedia (ed. Knight), O. (search)
waste from the axles of car-boxes, the journal-boxes of machinery. See also Sim's and Hutchinson's processes and machines, patented 1869, 1870, 1871. These are also particularly intended for extracting fusel-oil from grain. Oil-fil′ter. Robinson's oil-filter acts by the upward pressure of a column of water below the oil. The operation is as follows: — Robinson's oil-filter. Oil-gas apparatus. The butt g of oil being placed on a stillion, communication is made with its lower pRobinson's oil-filter. Oil-gas apparatus. The butt g of oil being placed on a stillion, communication is made with its lower portion by means of a pipe a leading from a cistern of water n. As the water flows into the butt, it displaces the oil, which passes by pipe b to the lower chamber of the filter which stands on the head of the butt. It thence passes through the perforated plate, a body of charcoal c, and a second perforated plate, to the upper chamber f, from whence it is discharged by the faucet. Impurities in the lower part of the filter are discharged by the faucet k. Oil-gas. Gas was distilled from oi
Knight's Mechanical Encyclopedia (ed. Knight), R. (search)
other to guide the workmen in forming the desired slope. Road-loco-mo′tive. A locomotive adapted to run on common roads. The idea, conceived by Watt and Dr. Robinson, was first realized by Murdoch, a Cornish engineer, who, about 1786, constructed a small locomotive which ran on the high-road near Redruth. William Symingtonllers. Davis, 1858. The canvas is drawn through a vat containing coal-tar. Pomeroy and Allen, 1859. Anderson, 1861. Steam-pipe to heat composition. Robinson, 1865. Coat sheets of felt, etc., with asphalt on one side, the other being supported by a roller. Sheets cemented together between pressure-rollers. RobinsRobinson's roofing-machine. Roofing-fabric machine. Fig. 4425 is a machine for preparing roofing fabric by passing sheets of felt or other material between rollers, the asphalt in a plastic state being applied between the sheets as they pass between the rollers. The upper rolls of paper are shown in the holders from which the she
Knight's Mechanical Encyclopedia (ed. Knight), S. (search)
ttle traveling in an endless shuttle-race. Robinson (1851) had two curved needles with notches or 13, 1867. 67,752HadleyAug. 13, 1867. 67,803RobinsonAug. 13, 1867. 67,815StantonAug. 13, 1867. 7 6, 1870. 110,669MoreauJan. 3, 1871. 110,790RobinsonJan. 3, 1871. 111,447GarrickJan. 31, 1871. 1. 21, 1842. 3,389CorlissDec. 27, 1843. 7,824RobinsonDec. 10, 1850. 9,380BradeenNov. 2, 1852. 12,161,632PalmerApr. 6, 1875. 5. Guides. 13,275RobinsonJuly 17, 1855. 16,586HullFeb. 10, 1857. 31,111, 1871. 114,276DulaneyMay 2, 1871. 114,604RobinsonMay 9, 1871. 119,284ShattuckSept. 26, 1871. . 3, 1874. 147,377EddyFeb. 10, 1874. 147,574RobinsonFeb. 17, 1874. 147,981SargeantFeb. 24, 1874. hocks by puffs of air was first realized by Dr. Robinson, and his device was the first and simplest carriages. Cugnot's steam-carriage. Dr. Robinson, in 1759, suggested to Watt the use of steaa knife-blade cannot be thrust between. Drs. Robinson and Thompson carefully measured these monster
Knight's Mechanical Encyclopedia (ed. Knight), W. (search)
s. In some cases the body of the dray is more elevated, and casks or cases are slung beneath it by chains, while a heavy load is carried on top. A number of devices have been introduced for dumping the load of a wagon. The Baltimore brick-wagons are made to travel back on rollers over the hind axle until they upset and discharge the load. Other wagons have trap-doors in the bottom. Others are made in sections so pivoted as to careen singly or simultaneously. Express-wagon. Robinson's dumping-wagon has a body composed of separate sections arranged in line with each other and pivoted to the bed-pieces of the wagon-frame, so as to be placed in a horizontal position to hold the materials, or tilted, rear end downward, to discharge the load. When the sections are all in a horizontal position, they are held by latch-pieces at their sides. To dump the load, the sections are disconnected and tilted, as indicated in the figure. Belgian dray. 2. A tool having four