Nov. 12.] THE NEW ZEALAND GAZETTE. 2419

No. 17100.—15th October, 1903.—JOHN JOSEPH MATTHEWS, of Maldon, Victoria, Plumber. Improvements in acetylene-generator apparatus.

Claims.—(1.) In acetylene-generating apparatus, the combination with a water-tank having an overflow, and having two U-shaped tubes (provided with a service-pipe and means for drainage) arranged for purifying, cooling, and delivering acetylene, of an annular floating gas-storage bell, and, jointed within the same, a gas-generating chamber casing having inserted within it from below an annular carbide-chamber having water-inlets, the standpipes being located relatively to said bell and chambers, as and for the purposes set forth. (2.) In acetylene-generating apparatus, the combination with an annular gas-bell of a water-tank having a U-shaped tube the limbs of which rise higher than the tank-sides, arranged for delivering cooled gas into the gas-bell and having a valve to prevent its return, and another U-shaped tube the limbs of which also rise higher than the tank-sides, adapted for the purifying and further cooling of the acetylene and for its delivery through a service-pipe, said tank having also a drainage-pipe, all as and for the purposes set forth. (3.) In acetylene-generating apparatus, the combination with a chamber d having a valve d¹, normally closed, but capable of being opened inwardly, of a carbide-chamber a inserted in the chamber d through the base thereof and secured by a bayonet joint or the like, the chamber a having an internal wall open at the top and bottom, all as and for the purposes set forth. (Specification, 5s.; drawing, 1s.)

No. 17103.—15th October, 1903.—EDMUND JOHNSTONE WILSON, of Jeetho, Victoria, Grazier. Improvements in reversible ploughs.

Claims.—(1.) In reversible ploughs, a double body consisting of two mould-boards A, A¹, end on to one another, a sole plate B extending the whole length of the double body and having a share such as C, C¹, at either end, the two parts of said body being arranged at such an angle the one to the other that when the plough is in use the rear half is clear of the ground, substantially as described and explained, and as illustrated in the drawings. (2.) In reversible ploughs, the combination with the beam K and handles J pivoted on the stud L of a turntable F having a bridge-piece G parallel at all points with the sole plate B, substantially as described and explained, and as illustrated in the drawings. (3.) In reversible ploughs, the combination with the beam K, handles J, and turntable F, of the jaws N, N¹, clutches O, O¹, and screwed rod V for operating said clutches, substantially as described and explained, and as illustrated in the drawings. (4.) In reversible ploughs, the combination with a double body as claimed in claim 1 and a beam K and handles J pivoted on the stud L of a turntable F having a bridge-piece G parallel at all points with the sole plate B, substantially as described and explained, and as illustrated in the drawings. (Specification, 5s.; drawings, 2s.)

No. 17118.—16th October, 1903.—CARL GUSTAF PATRIK DE LAVAL, of Kungstradgardsgatan, 2c, Stockholm, Sweden, Doctor of Philosophy and Engineer. Improvements in treating materials by radiated or reflected heat in electric furnaces.

Claims.—(1.) In treating materials by radiated or reflected heat in electric furnaces in which the materials in the furnace are in the form of a stack which presents towards the source of heat a slope or inclined surface, on which the desired heating effect take place, the method of introducing fresh material for treatment into the furnace by feeding said fresh material at the back of the stacked material at approximately the same rate as that at which the material on the slope of the stack is being consumed or removed by the heating action, substantially as and for the purposes set forth. (2.) In treating materials by radiated or reflected heat in electric furnaces, as specified in the preceding claim, introducing fresh material through a wall of the furnace by mechanical means in a continuous manner at the back of the stacked material so as to push forward the stacked material at approximately the same rate as the material on the front slope of the stack is being consumed or removed by the heating action, substantially as and for the purposes set forth. (Specification, 5s. 6d.; drawing, 1s.)

No. 17123.—21st October, 1903.—JOHN RICHARDSON HARDY, of Telopia Street, Redfern, Sydney, New South Wales, Kiln-builder. Improvements in kilns for burning bricks, tiles, pottery, and the like.

Claims.—(1.) In a kiln for burning bricks, tiles, pottery, and the like, the combination of the burning-chambers with the draft-chamber between the arches a, the steam-flues leading from the burning-chambers to the draft-chamber, the flues e, f, and g connected with the draft-chamber, and the flues l, substantially as described and shown on the drawings and for the purpose set forth. (2.) Means for cooling the burned bricks and cooling the surrounding atmosphere, substantially as described and shown on the drawings. (3.) In a kiln for burning bricks, tiles, pottery, and the like, the combination with the draft-chamber j of the side flues l connected with the burning-chambers by the passages n and with the said draft-chamber by means of the openings m, said passages being opened and closed by dampers, substantially as described and shown on the drawings and for the purpose set forth. (4.) In a kiln for burning bricks, tiles, pottery, and the like, in combination, the side flues l, passages n, dampers o, draft-chamber j between the arches of the burning-chambers, the steam-flues p leading from the burning-chambers to the draft-chamber, the flues e, f, and g connected with the draft-chamber, and the draft-stack connected with the draft-chamber, substantially as described and shown on the drawings and for the purpose set forth. (5.) The kiln as a whole, substantially as described and shown on the drawings and for the purpose set forth. (Specification, 4s. 6d.; drawing, 1s.)

No. 17125.—21st October, 1903.—GYSINGE AKTIEBOLOG, a corporation incorporated in Sweden, and residing at Näckströmsgatan, 4, Stockholm, Sweden (assignees of Fredrik Adolf Kjellin, of Gysinge, Gestrikland, Sweden, Engineer). Improvements relating to electric furnaces.

Claim.—An improved electric furnace for smelting or heating by means of an electric current induced in the material to be smelted or heated, or in a conductor being in contact with said material, in which furnace the induction-coil is coiled inside the smelting or heating chamber b around the central iron core d, surrounded by said chamber, instead of being coiled outside the furnace, substantially as described, and illustrated by the drawings. (Specification, 2s. 3d.; drawing, 1s.)

No. 17130.—8th October, 1903.—CHARLES FREDERICK LUNGLEY, of 2, Eville Place, Albert Park, Bourke, Victoria, Engineer. Improvements in the treatment of ironsand and iron-ore for the manufacture of iron and steel and alloys of iron and steel.

Claims.—(1.) In the treatment of ironsand and iron-ore for the manufacture of iron and steel, the direct method of reducing ferric oxide, ironsand or iron-ores of New Zealand, by means of carbonic-oxide or producing gas, to a metallic state, substantially as described. (2.) In the treatment of ironsand and iron-ore for the manufacture of iron and steel, the system of bringing the ironsand or iron-ore, by means of carbonic-oxide or producer gas, to the required temperature quickly, in order to bring it to the metallic state, substantially as described. (3.) In the treatment of ironsand and iron-ore for the manufacture of iron and steel, the making of malleable castings direct from the furnace in one operation, substantially as described. (4.) In the treatment of ironsand and iron-ore for the manufacture of iron and steel, the combined methods or processes herein described, comprising the thorough cleansing of the iron sand from all deleterious matter, the use of suitable furnaces for the reduction of the iron-sand or ore, and the treatment by carbonic-oxide gas, substantially as described. (Specification, 3s. 6d.)

No. 17131.—20th October, 1903.—EDWARD SHAW, of Broad Street House, London, England, Engineer. Improvements in the production of extract of coffee, and in apparatus suitable for use therein.

Claims.—(1.) The production of an extract of coffee by digesting at a high temperature coffee-berries with water in a closed vessel, removing from the berries the liquid extract so produced, again treating the berries at a lower temperature with water, and blending the two extracts so obtained, substantially as described. (2.) The process of producing an extract of coffee by digesting in a closed vessel for about ten minutes at a temperature of about 370° Fahr. coffee-berries mixed with water in the proportion of 100 parts by weight of berries to 150 parts by weight of water, with or without the addition of a small quantity of salt and burnt or other sugar, cooling the mass in a closed vessel to below 70° Fahr., and separating the berries from the resultant liquid; again boiling at a somewhat lower temperature for about half an