hide Matching Documents

The documents where this entity occurs most often are shown below. Click on a document to open it.

Document Max. Freq Min. Freq
Knight's Mechanical Encyclopedia (ed. Knight) 49 1 Browse Search
View all matching documents...

Your search returned 49 results in 7 document sections:

Knight's Mechanical Encyclopedia (ed. Knight), A. (search)
ine. See also air-engine; compressed-air engine; air as A water-elevator. Air′--cone. In marine engines; to receive the gases which enter the hot-well from the air-pump, whence, after ascending, they escape through a pipe at the top. — Admiral Smyth. Air′--cool′ing Appa-ra′tus. In this article will be considered the devices for cooling a current of air, for purposes of health and ventilation, and not those involved in producing anaesthesia by cold, the manufacture of ice, or the crtillery, firearms, projectiles, etc. For a list of arms of various kinds, cutting, missile, etc., see weapons. Ships' arms are cannons, carronade, mortars, howitzers, muskets, pistols, tomahawks, cutlasses, bayonets, and boarding-pikes. —Admiral Smyth. Arm′--saw. Another name for the hand-saw. Armstrong gun. Arm′strong gun. A description of ordnance adopted in the English artillery for all field-guns and many of larger caliber. It is built up of different parts
Knight's Mechanical Encyclopedia (ed. Knight), B. (search)
he horizontal vane has a slit in it. The back of the observer is turned towards the sun at the time of observation. (Admiral Smyth.) It is now superseded by instruments of more modern type, such as the reflecting quadrant and sextant. Back-std nautical instrument for taking angles. It had one large graduated arc of 90°, three vanes, and a shank or staff. — Admiral Smyth. Bow. The fore end of a ship or boat. Bow-compass. （Mathematical Instrument.) For drawing curves of lasmall; not from any difference in size, but according to position. The starboard is the best; the port, the small. — Admiral Smyth. Bow-fast. （Nautical.) A hawser at the bow, whereby a ship is secured alongside a wharf or other object. d-feather. b. The middle part of the fire-bars in a marine boiler, on either side of which the fires are banked. — Admiral Smyth. 3. (Shipbuilding.) A partial deck extending from side to side of a vessel amidships. It is common in stea
Knight's Mechanical Encyclopedia (ed. Knight), H. (search)
ring. （Horology.) A long and stiff spring in a clock which gives the effective impulse to the striking hammer, when the latter is retracted for a blow and then released. Ham′mock. （Nautical.) From hamac; the suspended bed of the Bahama-Islanders when discovered by Columbus. A swinging sea-bed, common in South American countries and elsewhere, and made of manilla, seagrass, and other fiber, often ornamented and of delicate material. The undisputed invention of Alcibiades (Admiral Smyth). It is a piece of canvas, 6 by 4 feet, the end gathered by knittles and a grommet, forming the head and foot clews, to which is attached the lanyard by which it is suspended from rings in the deck beams. The illustration is rather a swinging cot. The orders on board ship are, Down all hammocks! Up all hammocks! Lash hammocks! Their respective meanings are, to carry below and sling; to unsling and stow away; to brail up to allow a clear passage between decks. Ham′mock-net-t
Knight's Mechanical Encyclopedia (ed. Knight), P. (search)
A large flooring-nail. Pliers. Plex-im′e-ter. A plate employed in auscultation, being placed in contact with the body to receive the blows of the hammer. See percussor. Pleyt. （Nautical.) A kind of river craft. Playte. (Admiral Smyth.） Pli′ant. A French folding seat or chair. Pli′ers. A small pair of pinchers with long jaws, adapted to handle small articles, such as the parts of a watch or other fine machinery. It is also specially adapted for bending and shas. Prahu. The war-vessel of the Malays. It is from 55 to 156 feet in length; carries 76 to 96 rowers, and from 40 to 60 fighting men. The guns are of brass, from 2 to 6 inches' bore, mounted on stock pieces, and from 4 to 10 in number. — Adm. Smyth. Prairie-plow. A large plow supported in front on wheels, and adapted to pare and overturn a very broad but shallow furrow-slice. Its sharp share cuts at about half the depth of the sod's thickness, and such is found to be more e
Knight's Mechanical Encyclopedia (ed. Knight), R. (search)
determining the variation of the compass on board ship. It consists of two circles, either laid upon or let into each other, and so fastened together in their centers that they represent two compasses, the one fixed, the other movable; each is divided into 32 points of the compass and 360°, and, numbered both ways from the north and the south, end at the east and west in 90°. The fixed compass represents the horizon, in which the north and all the other points are liable to variation. — Admiral Smyth. Re-dan′. （Fortification.) A work having two faces forming a salient angle in the direction from which an attack may be expected; it is open at the gorge. Redans. A double redan (b), or bonnet depretre, has a reentering angle for mutual defense. The redan is the simplest field-work, and is used for defending the avenues of approach to a village, bridge, or defile. In front of another field-work, it is called a fleche. When flanks are added to the faces, the wor
Knight's Mechanical Encyclopedia (ed. Knight), S. (search)
ter; abaft a lateen mizzen with topsail. — Admiral Smyth. Scant′ling. 1. (Carpentry.) Lumbuly 4, 1871. 116,779WestJuly 4, 1871. 119,246SmythSept. 26, 1871. 120,614BarthNov. 7, 1871. 1296, 1872. 130,264WoodwardAug. 6, 1872. 130,324SmythAug. 6, 1872. 146,483ScribnerJan. 13, 1874. 110, 1871. 122,401PerkinsJan. 2, 1872. 122,673SmythJan. 9, 1872. 123,114LeavittJan. 30, 1872. 126,844SmythMay 24, 1872. 126,845SmythMay 24, 1872. 127,867GullmanJune 11, 1872. 130,325SmythAug. SmythMay 24, 1872. 127,867GullmanJune 11, 1872. 130,325SmythAug. 6, 1872. (Reissue.)5,177ColeDec. 10, 1872. 135,579ParhamFeb. 4, 1873. 135,930MooreFeb. 18, 1SmythAug. 6, 1872. (Reissue.)5,177ColeDec. 10, 1872. 135,579ParhamFeb. 4, 1873. 135,930MooreFeb. 18, 1873. 139,040BeebeMay 20, 1873. 141,088SmythJuly 22, 1873. 151,320SteinbachMay 26, 1874. 151,801SmythJuly 22, 1873. 151,320SteinbachMay 26, 1874. 151,801SmythJune 9, 1874. 158,596McCuneJan. 12, 1875. 5. By Movement of Table. 61,101RehfussJan. 8, 186SmythJune 9, 1874. 158,596McCuneJan. 12, 1875. 5. By Movement of Table. 61,101RehfussJan. 8, 1867. 6. By Pressure against Thread. 13,850StedmanNov. 27, 1855. class E. — button-hole. 1. O36,428, Tanner, September 9, 1862; No. 74,948, Smyth, February 25, 1868; No. 91,175, Smyth, June 8,[4 more...
Knight's Mechanical Encyclopedia (ed. Knight), U. (search)
s parts of the large compass, but both may be withdrawn and used independently for drawing small circles. Universal boring-machine. U-ni-vers′al Coup′ling. One in which the parts united are capable of assuming various angular relations to each other. A gimbal-joint is a familiar instance, — an invention of that versatile gentleman, Dr. Hooke. See universal joint; flexible coupling. Universal compass. U-ni-vers′al In′stru-ment. A reflecting instrument invented by Professor Piazzi Smyth. It is a sort of reflecting circle, in which a spirit-level with a very small bubble is so placed that by means of a lens and a totally reflecting prism an image of the bubble is formed at the focus of the telescope, and the coincidence of the center of that image with the cross-wires shows when the line of collimation is truly horizontal. U-ni-vers′al joint. A device for connecting two objects, as the ends of two shafts, so as to allow them to have perfect freedom of mot