Browsing named entities in Knight's Mechanical Encyclopedia (ed. Knight). You can also browse the collection for J. B. Johnson or search for J. B. Johnson in all documents.

Your search returned 54 results in 12 document sections:

1 2
semi-grand piano-forte. Bick-iron. A small anvil with a tang which stands in a hole of a work-bench. A beak-iron. Bi-cycle. (Vehicle.) A two-wheeled velocipede. The wheels are in line; the fore-wheel is driven by the feet. Johnson's old English patent for a hobby was a bicycle. See velocipede. Bidder-y-ware. (Alloy.) This is made at Bider, a town about sixty miles from Hyderabad, India. Dr. Heyne states its proportions as— Copper 8 Lead4 Tin1 To 3 ounceif necessary. The auger is raised vertically from the hole by throwing the rack at the side in gear with a wheel on the crank-shaft, and rotating the latter. The rack is thrown in and out by an eccentric; an arrangement patented by Stanley and Johnson, September 12, 1865. Carpenter's boring-machine. Boring-machines of various kinds are in use in bedstead, furniture, and other manufactories. In some cases the bits or augers are arranged in gangs in a gate or slide, which is slipped forw<
from the back of the film, and transferred back again to the paper on which it remained. Argentotype is a modified form of carbon picture introduced by Wenderoth, in which the print is backed by a polished plate, to bring up the high lights. Johnson proposes tin as a substitute, cheaper and less likely to tarnish. The carbon process has been carried forward in several different directions. A hardened film of bichromated gelatine has been pressed in a sheet of lead in a hydraulic press, x, Robert Kay, 1760. Spinning by rollers, Lewis Paul or John Wyatt, 1738. Spinning-jenny, Hargreaves, 1767. Water-frame, Arkwright, 1769. Power-loom, Rev. D. E. Cartwright, 1785. Cotton-gin, Eli Whitney, 1794. Dressing-machine, Johnson and Radcliffe, 1802– 1804. Power-loom, Horrocks, 1803-1813. Mule, Samuel Crompton, 1774-1779. Self-acting mule, Roberts, 1825. See cotton, flax, wool, hemp, silk, etc., appliances, p. 631. A cotton-factory cited by Ure has machine
f the surface of a mill-stone. Smoothing the surface of plank or of stone. Glossing of crape-warp. Arranging symmetrically the form in the chase. The complete planishing of sheet-metal ware into symmetrical form, on a stake or anvil. Dress′ing—bench. A bricklayer's bench having a cast-iron plate on which the sun-dried brick is rubbed, polished, and beaten with a paddle to make it symmetrical. Dressing-bench. Dress′ing—machine′. (For yarn.) A machine invented by Johnson, England, in 1800. The hardtwisted yarn is sized, scraped, brushed, and dried by heat and a blast of air. The object is to remove the fuzz and give it a slight gloss. Dressings. The moldings and sculptured decorations used on a wall or ceiling. Drift. 1. (Machinery.) A round piece of steel, made slightly tapering, and used for enlarging a hole in a metallic plate by being driven through it. The drift may have a cutting edge merely upon its advance face, or it may have
alverMay 17, 1870. 104,636W. I. PageJune 21, 1870. †109,417B. F. JoslynNov. 22, 1870. †111,534G. H. HarringtonFeb. 7, 1871. 113,053S. S. HopkinsMar. 28, 1871. 115.483B. F. JoslynMay 30, 1871. 115,916F. WessonJune 13, 1871. 116,078Moss and JohnsonJune 20, 1871. 116,422Forehand and WadsworthJune 27, 1871. †116,559F. G. CochranJuly 4, 1871. †116,593F. W. HoodJuly 4, 1871. †117,461C. B. RichardsJuly 5, 1871. †118,752C. Sharps,Sept. 5, 1871. 119,048C. B. RichardsSept. 19, 1871. 121,199er-built pleasure-boat, to be rowed by a pair of sculls. Fuor. (Carpentry.) A piece nailed upon a rafter to strengthen it when decayed. Fur′bish-er. A burnisher. Fur-cut′ter. 1. A machine for cutting the fur from the skin. Johnson, 1837, has a knife hinged at the end, and descending to make a shear cut against a stationary blade. The skin passes over a small roller, which displays the fur and enables the knife to reach the hairs near the roots, without to any
mount of caloric was rendered sensible, and that in re-expanding the same amount of caloric was rendered latent. Cooper, 1835 (English patent, No. 6875), describes an engine in which one part oxygen and two parts hydrogen are ignited to produce a vacuum alternately on each side of a piston. In Sir James C. Anderson's (English patent, No. 11,273), two cylinders open at the ends are placed end to end. A web of gun-cotton is fed to cylinders alternately and ignited by electric spark. Johnson's British patent of 1841 proposed to introduce pure hydrogen gas and oxygen instead of atmospheric air, in order that the water, the resultant of the explosion, might render the vacuum practically perfect. Otto and Langen's gas-engine is an upright hollow column, having a heavy piston, whose rod is a rack acting upon a cog-wheel on the fly-wheel shaft; as the piston ascends, the cog-wheel slips loosely on the shaft. The mixed gases, coal-gas and air, are exploded by communication with t
raniumU.6012018.43,632Diamg.13Klaproth1789The deity and planet Uranus. ZincZn.32.565.047.146707.09551/340Diamg.3911756429Paracelsus1541 This list does not include a number of rare metals which are not known out of the laboratory, and have no importance as yet in the arts. The data, with the exception of the equivalent (old system), fusing-points, and tensile strength, are derived, with few exceptions, from Miller's Chemistry. The conductivity for heat is that given by Calvert and Johnson. The results obtained by Wiedemann and Franz differ widely from these. For electric conductivity, Matheisson's results, which differ from those of Becquerel, are employed. The fusing-points are those given by Professor P. H. Van der Weyde. b. Broken stone around and beneath the wooden ties of a railway. 3. (Glass.) The technical name for the molten glass in order for blowing or casting. 4. The effective power of the guns of a vessel expressed in the sum of the weights of
er in size; as a nest of crucibles, tubs, or the like. 2. a. A place for hens to lay. The ingenuity is scarcely appreciated by the hens, who have a modest preference for hiding upon such occasions. The same may be said of the elaborate preparations for canaries during confinement. b. A box for martins or sparrows on a post or in a tree. Net. 1. A device for catching fish, birds, or other animals. It is made from a texture woven or knotted with large interstices or meshes. Johnson defines network to be anything reticulated or decussated with interstices between the intersections. The fabric is also used for securing or containing articles of various kinds. The dip-net is made in the form of a bag, the month of which is distended by a hoop, and is provided with a handle. When long and narrow, having floats on one side and sinkers on the other, so as to prevent the escape of fish in shoal water, it is called a seine. Nets were used by the ancients for fowling,
ortional to the intensity of the light passing through the different parts of the negative, and that the finer shades will not suffer destruction as they did in Poitevin's method. When the warm water had thoroughly developed the picture it was dried, trimmed, and again transferred by pasting it to the mount where it was intended to remain, the sheet employed as a temporary support being easily disengaged from the face by the application of a little benzole. More recently (in 1870), J. B. Johnson made some useful modifications in Swan's method of working, establishing what is known as the autotype process. Another photographic process, quite as distinct in its character as carbon printing, but comparatively of little general interest, is known as auiline printing, invented by Mr. Willis, England, in 1865. This method is designed for copying tracings or drawings, chiefly the former, and reproducing a few copies without alteration in scale and at little cost. Willis dispenses
her, and drawing them out so as to assume a direction longitudinal of the bar, some extraneous matters being also removed in the operation. In the year 1783, Henry Cort, of Gosport, England, received an English patent for the rolling of iron, as a substitute for hammering. During the following year he patented the puddling process. Cort is the greatest name on record in the History of iron. Plain rolls for reducing metal were in use before Cort's invention, and are mentioned in Dr. Johnson's Tour, 1774:— We then saw a brass works, where the lapis calaminaris is gathered, broken, washed from the earth, and the lead (though how the lead was separated I did not see) then calcined, afterward ground fine and then mixed by fire with copper. We saw several strong fires with melting-pots, but the construction of the fireplaces I did not learn. At a copper works, which receives its pigs of copper, I think, from Warrington, we saw a plate of copper put hot between steel rollers
2, 1857. 18,915LazelleDec. 22, 1857. 20,686JohnsonJune 22, 1858. (Reissue.)573GibbsJuly 13,4. 12,146WardJan. 2, 1855. (Reissue.)355JohnsonFeb. 26, 1856. 16,237JenningsDec. 16, 1856. 282ThayerFeb. 25, 1873. 23. Stitches. 16,120JohnsonNov. 25, 1856. 17,255BosworthMay 12, 1857. 2 1873. 142,689EldridgeSept. 9, 1873. 143,160JohnsonSept. 23, 1873. 143,433BrownOct. 7, 1873. 14. Covers. 55,023ThompsonMay 22, 1866. 72,739JohnsonDec. 31, 1867. 93,444HuntAug. 10, 1869. 98,4 vibrated when in the material (see patent to Johnson, March 7, 1854), or moved horizontally througcoated with graphite to diminish friction. Johnson, 1864 (j). The shell has a charging-hole closeam-gun1824 StephensonEnglishLocomotive1824 JohnsonEnglishSteamboat (Enterprize, to India, around, N. J. In 1824, the Enterprize, under Captain Johnson, made a voyage to India, doubling the Capery. Smith and De Coppet's Street-car. Johnson, June 26, 1856. Proposed to carry a small st[26 more...]
1 2