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and the prussiate of iron formed, allowed to AN IMPROVEMENT IN PORTABLE OVEX3 go to the bottom. The liquid is then to be AND STOVES; Edward Gosselin, City of drawn off clear from the precipitate, and a New York. This patent is for adapting a pure, or nearly pure, solution of sulphate portable and shifting oven to a cooking store, of alumine will be thus obtained ; and it the draught of which passes under the top may in this state be applied to various pur plate. The top plate of the stove is provided poses in the arts.

with two apertures, one near the front, and “ If desired, the water may be quickly the other near the chimney; there being a evaporated in leaden or other vessels, until damper in front of the rear aperture, which, a pellicle appears on its surface; when it when opened, admits the draught to pass may be put into suitable forms, and allowed directly out at the chimney, and when closed to cool and crystalize, or consolidate. directs it around the oven, the flue of which

“ I am aware that clay has been hereto. is made to fit the two openings in the top fore treated with sulphuric acid, to form a plate of the stove, so that the draught passes sulphate of alumine ; and I am also aware up at one end of the oven, over the top, that it is known to every chemist that iron down the back, and out at the chimney. may be precipitated from its solutions in Claim. “ What I claim as new and of my sulphuric or other acid, by means of prus own invention, and desire to secur

cure by let. siate of potash. I do not, therefore, make ters patent, is not the mere combination of any claim to the discovery of either of these a portable oven with a cooking stove, as this processes when taken alone; but I do claim is not new; but the combining the oven with the combination of means herein pointed the stove in the manner herein set forth, so out for the manufacturing of sulphate of that the draught from the stove shall pass alumine, by which it is produced with up on one end of the oven, over the top, and greater facility, and in a state of greater down on the opposite end into the common purity, than by any of the processes hereto flue of the stove ; that is to say, I claim the fore adopted in its manufacture; that is to combination of an oven constructed in the say, I claim, in combination, the preparing manner herein set forth, with any cooking of the clay by desiccation, the combining stove adapted to receive it, and so regulated thereof with sulphuric acid, and the subse as to admit the draught either to pass over quent solution and precipitation of the iron, the oven and thence into the common flue, substantially in the manner, and for the or to pass directly into the flue without cir. purpose, herein fully made known."

culating over the oven, the whole being conAPPARATUS FOR HEATING BUILDINGS structed substantially in the manner berein BY THE CIRCULATION OF HOT WATER

set forth." THROUGH TUBES; George M. Dexter, Bos WATERPROOF TRUNKS; Peter Getz, ton. The furnace and the tubes through Lancaster. Pennsylvania. The proposed which the heated water circulates, are improvement is adapted to the common arranged in an airchamber, the air within trunk, the space in the top, or lid, being which, when heated, is to be carried off made air tight with tinned copper. A bos to other apartments, or otherwise em that fits into the body of the trunk, is also ployed, as may be desired. The furnace made of tinned copper, covered on the top is vertical and surrounded with water except with wood. Into this top is made a hole at the door for the supply of fuel. A system with a metal ring fitted to it, to receive a of vertical and horizontal tubes communi. cover that screws into this ring, there being cate with the water chamber of the furnace a similar ring attached to a copper plate at top and bottom, by means of which con which constitutes the cover. The key hole nexion the water is kept in constant circula is made water tight by a screw cap in the tion.

same manner with the cover of the box. The Claim.-" What I claim as constituting whole being thus made water tight, and the my invention and improvement, is the heat upper part or lid of the trunk being an air ing of air in a chamber constructed for that chamber, the articles contained in the box purpose, within which chamber there is a

will not only be preserved from moisture, system of tubes, which tubes are beated by but the whole may be used as a life-preserver. causing water to circulate through them in The claim is confined to the “ method dethe manner set forth, said water being at a scribed of rendering trunks water-proof by temperature below that of boiling, and being constructing them with a screwed plate, or supplied by a heated vessel arranged and lid, in the manner set forth." operating substantially in the manner described, and the air so heated being conveyed from the said chamber through large trunks or other openings, into the apartments to be warmed, as made known."

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LIST OF DESIGNS REGISTERED BETWEEN APRIL 27TH, AND MAY 26TH, 1842. Date of Number

Time for which Registra- in the Registered Proprietors' Names, Subject of Design.

protection tion. Register.

is granted. 18 42. April 27

1211

George W. Jacob ................. Apparatus for heating irons ..............
1212 Robert Howard and Co....... ... Double action vernivolver reflecting screen 3
98
1213
Edmund Heeley ..................
Letter-clip

3
29 1214 Coalbrookdale Company .......... Panel ornament

3
1215,6 Stoddart and Boycot

Carpet
1217,8 Cooper, Boyle, and Co............. Stained paper........................
1219
Newcomb, Son, and Jones ... ... Carpet

1
1220 J. and W. Wood
Elastic spiral pessary

3
May 2 1221
Henry Longden and Son

3
1222 J. and M. Westwood
Steel pen..................................

3
1223 Benjamin Nickells ...............
Button

3
3 1224 Samuel Ackroyd

Stove

3
1223 James Carpenter ...
Mortice lock

3
1226 William Chesterman
Gridiron

3
1227 Newcomb, Son, and Jones Carpet

1
5 1228 Henry Bunton

• v
............. Ditto

1
1229 Andrew Shanks....................... Corner drill

3
6 1230 W. Hancock, jun. .................. Triangular pointed rubber
1231 J. H. Hood... ................. Portfolio .........

1
9 1232 Carron Company

Fender............

3
1233
Thomas Culpin
Horse-rake

3
10 1234 Rice Harris

Rosette

3 1235 J. Rawlins ........................... Carriage-spring

3 12 1236 S. Ackroyd

Stove

3
1237 Ditto
Fender.....

3
1238 George Gilbert
............ Ring-hole brace-button

3 13 1239 G. and H. Talbot

Carpet

1
1240 Jenner and Bettridge ............. Fastening for curtain-bands, or loops...... 3
1241 Joseph Bridgen..................... Window show cards..........

1
1212 J. M. Gladstone
Hand-drill

3
1243 R. Foulis ............................. Music note pen...

3 18 1244 William Blenkiron

Wristband fastening

1
1245 John Hawkins
Fire-escape...

3
1246 G. Kershaw
Spring letter clip

3
1247 William Baddeley
.................. Garden-engine

3 20 1248 Lea and Co.

Carpet
1249 Alfred Lapworth
1250 Richard Cross
Saddle

1
1251 George Fletcher..................... Metal gland-bolt for sugar-mills ............ 3
25
1252 Gray Brothers
Lamp collar

3 26 1253 Richard Archibald Brooman Tea-kettle 12 15 John Neil Tile

3 (AGENTS FOR EFFECTING REGISTRATIONS, MESSRS. ROBERTSON AND CO., 166, FLEET-STREET.)

16

Ditto ............

LIST OF ENGLISH PATENTS GRANTED BETWEEN THE 28T8 OP APRIL, AND THE 26TH

OF MAY, 1842. Henry Barclay, of Bedford-row, for a composition ter, gas apparatus-manufacturer, for certain imor compositions applicable as tools or instruments provements in apparatus for gas-water and other for cutting, grinding, or polishing glass, porcelain, fluids. May 9; six months. stones, metals, and other hard substances. April Samuel Hall, of Basford, C. E., for improve30; four months to specify.

ments in the combustion of fuel and smoke. May John Robinson, of Watney-street, Comrar al 9; six months. road East, engineer, for improvements in windlasses Jacob Wilson, of Wigmore-street, Cavendishand capstans. May 3; six months.

square, upholsterer, for certain improvements in John Railton, of Blackburn, machine-maker, for bedsteads. May 9; six months. certain improvements in machinery or apparatus William Sanderson, of Aldermanbury, London, for weaving. May 3; six months.

silk-manufacturer, for improvements in weaving Godfrey Wetzlar, of Myddleton-square, Clerken. fabrics to be used for covering buttons. May 9; well, for improvements in rendering fabrics water six months. proof. (Being a communication.) May 7; six John Melville, of Upper Harley-street, esquire, months.

for certain improvements in propelling vessels. Joseph Warren, of Heybridge, Essex, agricul. May 11; six months. tural implement maker, for certain improvements John Browne, of Brighton, gentleman, for imin ploughs. May 9; six months.

provements in the manufacture of mud-boots and Francis Prime Walker, junior, of Manchester, overalls. May 12; six months. coal-merchant, for certain improvements in the Thomas Williams, of Bangor, smith, for an immanufacture of candles, candlesticks, or candle proved chura. May 17; six months, holders, and in the apparatus connected there William Brunton, of Neath, Glamorgan, C. E., with. May 9; six months.

for an improved method or means of dressing ores George Haire, of Manchester, gentleman, for and separating metals or minerals from other subcertain improvements in machinery or apparatus stances. (For the colonies only.) May 19; 4 months. for sweeping and cleaning chimneys and flues, Joseph Gibson, of Birmingham, manufacturer, May 9; six months.

for certain improvements in axletrees and axletreeThomas Edge, of Great Peter-street, Westmins boxes. May 23; six months.

gate, farmer, for improvements in thrashing and winnowing machines. May 4.

John Carr, of North Shields, Northumberland, earthenware manufacturer, and Aaron Ryles, of the same place, agent, for an improved mode of operating in certaia processes for ornamenting glass. May 6.

Henry Barrow Rodway, of Birmingham, winemerchant, for improvements in the manufacture of horse-shoes. May 12.

Sir James Murray, of Merrion-square, Dublin, knight, and Doctor of Medicine, for an improved method of combining various materials in a manner not hitherto in use, for the purpose of manure. May 12.

John George Bodmer, of Manchester, engineer, for certain improvements in machinery, or apparatus for cleaning, carding, roving, and spinning cotton, and other fibrous substances. May 16.

Peter Kagenbusch, of Wetter on Rhur, Westphalia, Dyer, but now of Whitby, England, for an improvement in the dyeiag of wool, woollen-cloths, cotton, silks, and other fabrics and materials. May 17.

John Bennet Lawes, of Rotherhampstead, Hertford, gentleman, for certain improvements in manures. May 23; six months.

John Bishop, of Poland-street, Westminster, jeweller, for a new or improved construction of brake apparatus applicable to railway carriages. May 23; six months.

Thomas Middleton, of Loman-street, Southwark, engineer, for an improved method of preparing vegetable gelatine or size for paper, and also an improved mode of applying the same in the manufacture of paper. (Being a cominunication.) May 23; six months.

William Tudor Mabley, of Henrietta-street, Covent-garden, mechanical draftsinan, for improvements in machinery or apparatus for making nails. (Being a communication,) May 23; six months.

Benjamin Cook, junior, of Birmingham, brassfouuder, for improvements in the construction of bedsteads, both in metal and wood. May 23; six months.

Frederick Goos, of Manchester, jacquard machine-maker, for certain improvements in the jacquard machine or apparatus, to be used or employed in looms for weaving. May 23 ; six months.

Sir James Murray, of Merrion-square, Dublin, Doctor of Medicine, for an improved method of combining various materials in a manger not hitherto in use for the purpose of manure. May 23.

James Pilbrow, of Tottenham, engineer, for certain improvements in steam-engines. May 23; six months.

William Geeves, of Old Cavendish-street, gentleman, for improvements in machinery for cutting cork. May 24; six months.

James Stewart, of Osnaburgh-street, Regent'spark, piano-forte maker, for improvements in hinges for piano-fortes and other purposes. May 24; six months.

Thomas Waterhouse, of Edgely, Chester, manufacturer, for a certain improvement or improvements in machinery for carding cotton, wool, fax, silk, and similar fibrous materials. May 24.

Joseph Duce, of Wolverhampton, lock-manufacturer, for an improved lo and key to be used therewith, and an improved slide bolt for the said lock, applicable also to other purposes. May 24; six months.

James Boydell, junior, of Hope Farm Works, Dudley, for improvements in the manufacture of keel plates for vessels, iron gates, gate-posts, fencings, and gratings. May 24; six months.

James Potter, of Manchester, manufacturer, for certain improvements in machinery for spinning cotton, flax, and other fibrous substances. May 25; six months.

Peter Kagenbusch, of Whitby, York, for an improvement in the dyeing of wool, woollen cloths, cotton, silks, and other fabrics and materials. May 26; six months.

LIST OF PATENTS FOR IRELAND GRAXTED

IN MARCH AND APRIL, 1842. Charles Wye Willians, for certain improvements in the making and moulding of bricks, artificial fuel, and other substances.

Stopford Thomas Jones, for certain improvements in machinery for propelling vessels by steam or other power.

George Jarmon, Robert Cooke, and Joshua Woodsworth, for certain improvements in machinery for spinning flax, hemp, and tow.

William Irving, for improvements in the manu. facture of bricks and tiles.

James Thorburn, for certain improvements ia machinery for producing knitted fabrics.

John Hall, for improvements in the construction of boilers for generating steam, and in the application of steam to mechanical power.

Richard Hodgson, for improvements in the forme or shapes of materials and substances used for pa. ving and building, and in the combination for such purposes.

Theophile Anton Wilhelm Count de Hompesch, for improvements in obtaining oils and other products from bituminous matters, and in purifying or rectifying oils obtained from such matters,

George Wildes, for improvements in the manufacture of white lead.

Joseph Henry Tuck, for improvements in apparatus or machinery for making or manufacturing candles.

Alphonse René Le Mire de Normandy, for improvements in the manufacture of soap.

John Juckes, for improvements in furnaces and fire-places.

William Brunton, for an improved method or means of dressing ores, and separating metals or minerals from other substances.

LIST OF PATENTS GRANTED FOR SCOT

LAND, FROM APRIL 22ND TO MAY 22ND 1842. FOUR MONTHS TO SPECIFY IN EACH CASE. John Venables, of Burslem, Stafford, earthenware manufacturer, and John Tunnicliff, of Burslem, aforesaid, bricklayer, for a new and improved inethod of building and constructing ovens used by potters and china-manufacturers, in the firing of their wares. Sealed April 25.

William Newton, of Chancery-lane, civil-engincer, being a communication from abroad, for an improved machine or apparatus for weighing various kinds of articles or goods. April 27,

Joseph Atkinson, of Braham Hall, near Harrow

INTENDING PATENTEES may be supplied gratis with Instructions, by application (postpaid) to Messrs. J. C. Robertson and Co., 166, Fleet-street, by whom is kept the only COMPLETE REGISTRY OF PATEXTS EXTANT (from 1617 to the present time). Patents, both British and Foreign, solicited. Specifications prepared or revised, and all other Patent business transacted.

LONDON: Edited, Printed, and Published by J. C. Robertson, at the Mechanics' Magazine Office,

No. 166, Fleet-street.-Sold by W. and A. Galignani, Rue Vivienne, Paris;

Machin and Co., Dublin; and W. C. Campbell and Co., Hamburgh.

Mechanics' Magazine, MUSEUM, REGISTER, JOURNAL, AND GAZETTE

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BLAXLAND'S PROPELLER — PARTHER EXPERIMENTS. In our last volume (p. 209) we gave an paddle-wheels of a mile and a half per account of some very remarkable experi- hour. The lines of the Swiftsure are ments made with a new stern propeller, very unfavourable to speed; at the boys invented by Mr. George Blaxland, as particularly, which are as bluff as those applied to the Jane, a little vessel of no of a Dutch lugger. A vessel with a fine more than three tons, with a steam-engine cutwater, similar to those of the crack of less than one horse power, in which Gravesend boats, would no doubt hare the enterprising inventor had actually exhibited a much greater proportional made two or three successful sea voy increase of speed. But had the vessel ages; and we gave also a brief descrip- only gone as well as before, there would tion of the propeller, with a full expo have been a great advantage achieved in sition of the advantages expected from the removal of the propelling machinery its adoption.

from the sides of the vessel to the stern, We mentioned at the same time that and its entire submersion there below the the well-known commercial steamer the water line. Exemption from risk of Swiftsure (157 tons burden, 40 horse damage by shot--an end to the retarding power) had been purchased for the ex influence of backwater-and the removal press purpose of having the new propeller of every obstacle to the occasional use of applied to her, and its capabilities tested sails, are among the more obvious conon a large scale.

sequences of this improved arrangement. Before removing the old paddle-wheels The gear work, by which the power of from the vessel, several experiments were the engines (a pair of twenties) is commade with her to ascertain her then rate municated to the propeller shaft, and of going, when it was found not to ex which has been also patented by Mr. ceed, under the most favourable circum Blaxland, is remarkable for its efficiency, stances, 7} miles an hour.

and for the smoothness and stillness of The removal of the paddle-wheels and its action. Except at the stern of the boxes relieved the vessel of an over vessel, immediately above the propeller, hanging weight of 12 tons, 6 cwt., 2 qrs., not the least tremor is felt, nor noise 16 lbs. ; but as we must set off against heard. The vessel moves so silently this the weight of the propeller and its through the water, and the propeller is connexions, which is about 4 tons, the so entirely out of sight, that, were it not total reduction of tonnage is little more for the engine chimney, one would be . than 8 tons.

puzzled to conjecture by what means sbe The reduction in the width of the is propelled. vessel, from the removal of the paddle We had the pleasure of being per. wheels, has been 14 feet, making her sonally present at a subsequent experiment present beam 16 ft. 3 in.; her length is made with the Swiftsure, and of verifying 112 feet.

the preceding statements in every partiOn Saturday, the 21st ult., a trial of cular. Not a single drawback from the the vessel, as thus altered and newly utility of the inventiou were we able to fitted up with Mr. Blaxland's propeller, detect. Often before has the paddlewas made on the river in the presence of wheel been threatened to be superseded, the following members of the Board of but never, to our mind, with so good a Admiralty :- the Earl of Haddington; prospect of success. Mr. Blaxland's proAdmiral Sir George Cockburn; Admiral peller accomplishes all that can ever be ex. Sir William Hall Gage; Adiniral Sir pected to be accomplished by the screw, George Francis Seymour; the Hon. whether employed according to Mr. Henry Thomas Lowry Corry, (five of Smith's plan, or to Captain Ericsson's ; the six Lords,) and the Hon. Sidney while it is wholly free from the mechaHerbert, M.P., Chief Secretary, who nical objections inseparable from the expressed themselves in the highest de use of that agent. Whether any other gree pleased and satisfied with her per form of propeller, if applied and workformances.

ed in the same way as Mr. Blaxland's The speed of the vessel is now full would not answer equally well, we nine miles an hour; showing a gain by need not at present stop to enquire ; the substitution of the propellers for the for Mr. Blaxland's propeller, and Mr.

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