NOTICES TO CORRESPONDENTS. 2000. Robert Adams, of King William-street, London. Improvements in machinery for boring and rifling the barrels of fire-arms. 2002. Julian Bernard, of Club Chambers, Regentstreet, Middlesex, gentleman. Improvements in the manufacture of boots and shoes or other coverings for the feet. 2004. Robert Rawlinson, of Westminster, civil engineer. Improvements in valves or adjustable thoroughfares. Dated September 15, 1854. 2006. Felix Fontenau, of Paris, France, gentleman. An improved mode of preventing mud from touching or adhering to carriages. 2008. Andrew Barclay, of Kilmarnock, Ayr, engineer. Improvements in refracting and reflecting telescopes. Dated September 16, 1854. 2010. Joseph Harrison, machinist, John Oddie and John Eaves, mechanics, and Henry Graham, power-loom manager, all of Blackburn, Lancaster. Improvements applicable to machines for warping, sizeing, or otherwise preparing yarns or threads for weaving. NOTICES OF INTENTION TO (From the "London Gazette," October 3rd, 1854.) 1102. William Coulson. Improvements in machinery for mortising and tenoning, 1115. Charles Barlow. Improvements in the manufacture of metallic capsules for covering or securing bottles and other vessels. A communication. 1169. John Packham. Improvements in boilers used for heating and circulating water. 1177. James Lord. Improvements in the manufacture of articles of ladies' under clothing. 1199. Leopold Wertheimber. Improvements in apparatus for preventing sea-sickness. 1204. John Kent. Improvements in harbour or river boats and other floating vessels, also in paddle-box boats. 1271. Jean Baptiste Numa Erard. ments in the preparation of paint. Improve 1281. John Braithwaite. An improved method of roofing or covering buildings, reservoirs, and other spaces requiring roofs or coverings. 1332. Joseph Valentin Weber. Improvements applicable to chronometers and other mechanism requiring a steady spring power. 1340. William Brunton. Certain improvements in metallic pistons. 1395. Richard Archibald Brooman. A new or Improved projectile for ordnance and small arms, and a sabot or plug to be employed therewith, which sabot or plug may also be used with other projectiles. A communication from W. Antrobus Holwell, of Quebec. 1558. Thomas Wright. permanent way of railways. Improvements in the 1561. William Hunt. Improvements in utilizing certain compounds produced in the process of galvanizing iron, and in the application of the same and similar compounds to certain useful purposes. 1594. Joseph Barnes. Certain improvements in furnaces or fireplaces. 1648. Pierre Victor Delaye. Improvements in printing-blocks. 359 1659. Henry Wickens. Improvements in the means of giving signals on railways, and for other purposes. 1773. Henry Smith. Improvements in the manufacture of wrought-iron wheels. 1817. Edward Lund. Improvements in cocks, valves, water-plugs, and flexible joints. 1853. Matthew Curtis, William Henry Rhodes, and John Wain. Improvements in certain machines for spinning and doubling cotton and other fibrous substances. 1937. William Brown foot. A new or improved instrument or apparatus for raising, lowering, and adjusting Venetian blinds. 1940. Samuel Stocker. Certain coverings for various parts of the human body, with a view to the preservation of health. 1943. Isaac Pim Trimble. Improvements in regulating the temperature in conservatories and other apartments, or in ventilating the same. 1945. James Eden. Improvements in apparatus for drying fabrics. 1948. William Newbould. Improvements in the manufacture of busks for stays. 1969. Henry Robert Ramsbotham. Improvements in preparing to be spun wool, cotton, hair, tow, and other fibrous materials. 1971. John Wesley Hackworth. Improvements in steam engines, and in gearing connected therewith. 1994. Henry Crosley. Improvements in the manufacture of paper, millboard, and felt, from materials not hitherto so used. 2004. Robert Rawlinson. Improvements in valves cr adjustable thoroughfares. Opposition can be entered to the granting of a Patent to any of the parties in the above List, who have given notice of their intention to proceed, within twenty-one days from the date of the Gazette in which the notice appears, by leaving at the Commissioners'-office particulars in writing of the objection to the application. Water-gauge. Birmingham ......................................................... Label-damper. E. and W. Seagrove ... Portsea ................................................................................ Naval chest. C. H. Wagner .......... Birmingham J. E. Smith ............... Wood-street.............................................. H. Marshall Addresses. Sept 1 3632 J. Holmes and W. Pep Manchester 2 3633 A. Clapshaw. 7 3634 A. Soyer Great Russell-street H. Rawson ............... Leicester Northampton Regulating-pen. Wheel-roller. H. Rogers................. Upper Thames-street................... Sewer-trap J. Classon.................. Dublin H. Marshall... G. Wharton ............... Chesterfield Urinal, J. Anstey................... Coventry................................................................................. Watch-dial. J. Victor............................................... Wadebridge. Subauriga carriage. J. R. Cooper CONTENTS OF THIS NUMBER. Dalgety's Rotary Steam Engine—(with engravings) Proceedings of the British Association.-Ab- On some Peculiarities of the Magnetic 337 Whitaker, Diggle, Button-fastener. 354 and Howarth ...Spinning..................................................... Latchford.............Saddlery ................... 355 Haeffely.......Stannates................... 355 .Pins for Railway Chairs 355 Hopper...... Provisional Specifications not Proceeded with: Barnetche............Railway-breaks, &c. 355 355 355 Devincenzi .........Ornamental Surfaces... 355 338 On the Deviation of the Magnetic Needle 340 341 Lamy Specifications of Patents recently Filed: Barlow ...... ..........Waterproofing...... 351 Beardsley Boyell Cookson............... Lead Ores.................. 351 Warne ...............Tubular Boilers 355 Brown................Suspending Furniture.. 356 Good.................. Thrashing-machines 356 356 356 356 Garnier............... Preparing Flax .......... ..................Preserving Substances. 356 Desrousseaux ......Looms Lawrence ............. 356 356 Buchanan............Communicating Motion 356 ...Raising Liquids ......... 357 ................ Newton...............Raised Printing Sur .Textile and Looped Fa ..Fire-guard... 351 ........ head 357 357 Hall Windlass 357 Selby Tubes and Pipes....... 352 Johnson...............Boiler-tubes.... 352 Monzani .Bedsteads 357 LONDON: Edited, Printed, and Published by Richard Archibald Brooman, of No. 166, Fleet-street, in the City of London.-Sold by A. and W. Galignani, Rue Vivienne, Paris; Machin and Co. Dublin; W. C. Campbell and Co., Hamburg. LAUREAU'S PATENT FURNACES. (Patent dated February 24, 1854.) THE engravings on the preceding page represent a furnace which has recently been patented in this country by M. Laureau, of Paris. It is adapted for the smelting of iron, the melting of glass and enamel, and for a variety of other purposes. Fig. 1 is a vertical longitudinal section; fig. 2, a horizontal section; fig. 3, a transverse vertical section; and fig. 4, an end elevation. This furnace is intended to be made about eight feet in height; but its dimensions may be greatly varied, and it may always be made of much less height than the ordinary blast furnaces. A sufficient capacity is obtained by increasing its width and the number of fires. The furnace shown in the figures has only two fires, C, which are separated by the pier, B. These fires are covered by a series of cylinders or retorts of iron or fire-clay, D, for generating carburetted-hydrogen, or other gases, which it may be required to introduce into the furnace. The gases pass through perforations, j, in the backs of the retorts, and, descending, pass under the brickwork or masonry, k, and enter the body of the furnace, N. Each fire has two grates, E and F, placed one above the other. The upper grate consists of a series of tubes of iron or fire-clay, E, supported on a frame, b. Each of these tubes contains a number of small hollow cones of iron or clay, d, having all their apices directed towards the interior of the furnace. These tubes, E, are always kept at a high temperature by the fire resting upon them, and also by the cinders or partially consumed fuel which drops between them on to the second grate, F. Air passes through these tubes, and, becoming highly heated, meets with the products of combustion of the fire, and the gases from the retorts, D, and the intensely hot flame thus produced enters the body of the furnace, N, between the short pillars or supports, ll. The second grate, F, is intended for burning the cinders or partially consumed fuel, and the smaller portions of the fuel which fall between the tubes of the upper grate. The bars of the second grate are of iron, and placed closer together than those of the upper grate. A triangular or prismatic tube, c, with one of its angles downwards, is placed between the two grates, and employed for conveying away the slag when the furnace is used for smelting iron, This tube, c, being placed between the two grates, is kept sufficiently hot to prevent the slag from solidifying in it. All the parts of the fire places, including the supports of the grates, are capable of being removed and replaced when repairs become necessary. To facilitate this operation, and to support the upper part of the furnace, each fire-place is covered with a large block or bearer of stone at G. When the central pier, B, requires repairs, these stone bearers are supported by temporary props. One or more openings, e, are made in the front of the furnace for introducing gases, or other matters, if required, and also for examining the interior of the furnace when required. These openings are generally kept well closed. ff' are two sliding plates or registers, which slide in frames built into the upper part or throat of the furnace. These registers have apertures in them corresponding to a series of prismatic or semicircular pieces of stone or cast iron, H, fixed in the throat of the furnace, so that by drawing the registers out a little, their apertures are brought under the spaces between the pieces, H, and anything placed there is allowed to fall through. The charge of materials is thus introduced into the furnace, and by closing one register before the other is opened, the products of combustion are prevented from escaping, and the air is also prevented from entering. g is another plate, without apertures, which serves for covering the top of the furnace. If it be required to close the top of the furnace stili more effectually, the plate, g, is made with a rim round its edge, which enters a groove containing water or other liquid, so as to make an hydraulic joint. The walls of the upper part of the furnace are made thinner than at the lower part, so as to prevent the upper part from becoming too hot. The capacity of the furnace may be greatly increased by lengthening it, and increasing the number of fires, without the necessity of increasing its height; and the heat of each part of the furnace may be regulated by urging or slackening the different fires. is the crucible from which the melted iron or other substance is drawn off from time to time at P. M is the brickwork or masonry forming the back of the furnace, and having several passages I, I, and K, communicating with the common passage, J. The vapours and gases in the upper part of the furnace escape by the passages, I, I, and join the torrent of flame passing through the passages, K. The united stream passes through the channels, L, into the condensing flue, Q, and thence up the chimney, O. The flue, Q, is constructed of stone or granite, and may be from fifteen to thirty feet long, or more or less. Its bottom is formed of basins of granite, each of which is furnished with an outlet passage and JOPLING'S PATENT FURNACE TUYERE. 303 stopper. The top of the condensing flue is formed of flat stones or flags, R, pierced with holes, and having grooves or gutters formed in their surfaces. These flags are covered with sand, which is constantly supplied with water, so as to produce a continual shower in the condensing flue, Q. The condensible matters carried away by the flame, and products of combustion, are thus condensed in the flue, Q, in lieu of passing up the chimney. A furnace or fire-place may be placed at the bottom of the chimney, O, to increase the draught. The flue is made with alternate enlargements and contractions of section to check the return of the gases towards the furnace. The inventor, in his specification, describes other furnaces constructed mainly upon similar principles, but affected with various modifications of the arrangement just de scribed. JOPLING'S PATENT FURNACE TUYERE. Mr. J. Jopling, of Bishopwearmouth, has patented an improved nozzle for the end of the tuyere or blow-pipe of a blowing apparatus, his object being to protect the same from the injurious effects produced by the action of the fire upon it. The nozzle is composed of two pieces, one being the front or face which is in contact with the fire, and through an orifice in which the air passes into the fire; the other being the back or back-plate, in which an orifice is made to receive the end of the tuyere or blow-pipe. The interior of this hollow nozzle is constructed with one or more annular chambers, the front and back-plates or pieces being furnished with the requisite number of bosses or flat rings alternately fixed upon them, the boss through which the air passes to the fire forming the inner boss or ring, the second being exterior to that, and fixed upon the back-plate, and, if the number be increased, the third fixed on the front plate, the fourth on the back plate, and so on, according to the number of chambers. The rings are made of such sizes, and so placed, that upon the two plates being put together, there shall be alternately a boss or ring fixed to the front plate, and a boss or ring fixed to the back plate, concentric, or nearly concentric, with each other, and the one within the other, and with spaces between them, so that they may form two or more annular chambers, into the outer of which the air may be blown, passing through each of them in succession until it shall finally reach the orifice in the front plate, through which it passes into the fire, as already mentioned. The front or face of the nozzle being in contact with the fire, that part of the nozzle and the annular chamber or annular chambers are heated. The air is blown through the tuyere or blow-pipe into the annular chamber or into the outer annular chamber (if there be more than one), from whence it passes through the inner chamber or chambers, and ultimately through the centre of the boss to the fire, in order to cool or diminish the heat of the nozzle, and parts connected therewith, and prevent them from being destroyed as rapidly as the end of the ordinary bellows-pipe of a forge. Two or more tuyeres may be used for blowing the air into a nozzle. The accompanying engraving represents a vertical section of a nozzle constructed according to Mr. Jopling's invention. A A is the back plate of the nozzle, and B B is the front or face of the same, which is secured to the back plate by bolts and nuts; D is a boss or ring formed on the back plate, A A, and E is a similar boss or ring of smaller dimensions formed on the front or face, B B. These bosses or rings, when the back plate and the front or face of the nozzle are bolted together, come one within |