Sept. 27.] THE NEW ZEALAND GAZETTE. 1799

with a belt H, on to which the wash is poured, when by the revolution of the pulley all except magnetic ironsand falls off; but the ironsand is retained by the magnetism in the pulley-rims till torn away by the belt leaving the pulley, substantially as described and as shown, and for the purposes set forth. (2.) In the separation of gold-bearing wash from ironsand, the combination of successive portions of the rim of a pulley E, E, E, E, Fig. 3, being successively formed into electro-magnets and successively demagnetized as such portions of the rim pass required points in the revolution of the pulley, allowing all except the magnetic sand to fall away into one shoot and retaining the ironsand till the portion of the rim to which it is adhering is demagnetized; with the arrangements of shoots, and wires, and connections for cutting out and in the electric current, and with or without H or H¹, substantially as shown and described and for the purposes set forth. (3.) In combination, a pulley having the rim divided into as many sections as there are arms, the said arms also forming cores B for winding covered electric coils B¹ for magnetizing the rim of the pulley E by a current of electricity, either continuously, or demagnetizing and remagnetizing portions of the said rim as each portion passes certain points in the revolution of the pulley, the pulley running on the shaft A or A¹, with the arrangement of shoots F, G, G¹, F, shaken by such means as J, J¹, or K, and with or without a belt H, or a collar H¹, and with or without scrapers, the said belt or pulley travelling faster than the stream of wash in the upper shoot F, all substantially as set forth and for the purposes indicated.

(Specification, 4s. 3d.; drawings, 8s.)

No. 12675.—12th June, 1900.—WILLIAM MCKEEGAN, of Waterloo Quay, Wellington, New Zealand, Engineer. An improved dredge.*

Claims.—(1.) In a dredge, a revolving tube in the interior of which a vacuum is induced, and on the end of which a cutter or nozzle is mounted, substantially as set forth. (2.) A nozzle or cutter for excavating gravel and the like below the surface of water consisting of chambers or scoops arranged around the axis of the nozzle or cutter, substantially as set forth. (3.) In a dredge, a tube carried in bearings on a ladder so that it may be revolved substantially as set forth. (4.) In a dredge, a tube mounted in bearings on a ladder in combination with an engine and gearing for revolving the said tube, substantially as set forth. (5.) In a dredge, a tube mounted in bearings on a ladder and pivotally connected to a vacuum chamber, substantially as set forth. (6.) In a dredge, a tube mounted in bearings on a ladder and connected to a vacuum chamber by means of an elbow and stuffing-boxes, so that it may be revolved and raised or depressed without destroying the vacuum in itself or the vacuum chamber, substantially as set forth. (7.) In a dredge, a chamber into which material to be treated is drawn by means of a vacuum, and wherein the said material is concentrated, substantially as set forth. (8.) In a dredge, a vacuum chamber provided with screens for treating auriferous material and the like, substantially as set forth. (9.) In a dredge, a vacuum chamber provided with screens, and means for agitating the said screens, substantially as set forth. (10.) In a vacuum chamber on a dredge such as described herein, screens composed of side frames and bearings, to which are attached bars of wide mesh above and finer meshes below, said screens being mounted on rollers running on brackets fixed to the sides of the vacuum chamber, substantially as set forth. (11.) In a dredge, a chamber in which a vacuum is induced by a centrifugal pump or pumps which expel the finer material drawn into the said chamber, substantially as set forth. (12.) In a dredge, a chamber in which a vacuum is induced by the suction of one centrifugal pump, which also withdraws the finest material from the said chamber, and by the discharge of another centrifugal pump, which, with its nozzles, operates as an ejector for discharging coarser material, substantially as set forth. (13.) In a dredge, a pocket in a vacuum chamber for receiving coarsest material brought into the said chamber, and provided with a power-operated trap-door for ejecting the said coarse material, substantially as set forth. (14.) In combination, a vacuum chamber, screens for sifting material brought into the chamber, a suction pump and a pump acting as an ejector for inducing a vacuum in the chamber and for discharging the fine material, and a pocket provided with a trap-door for the coarsest material, substantially as set forth. (15.) In combination, a tube carried in bearings on a ladder so that it may be revolved and raised and depressed, and a vacuum chamber provided with screens and pockets, and pumps for inducing a vacuum in the chamber, substantially as set forth. (16.) In combination with pontoons, a ladder carrying a revolving tube provided with a nozzle or cutter, framing to support the ladder, and gearing for revolving the tube, an elbow and stuffing-boxes, a chamber in which a vacuum is induced by pumps and wherein a screen is mounted on rollers, means for reciprocating the screen, pockets for receiving the treated material, a chute to carry the tailings, and an elevator, substantially as set forth. (17.) A brush mounted in a shield attached to a stationary tube carried on a ladder and connected to a vacuum chamber in such a manner that it may be raised or depressed, and means for rotating the said brush, substantially as set forth. (18.) In combination, a brush mounted in a shield attached to a tube held stationary on a ladder and connected to a vacuum chamber in such a manner that it may be raised or depressed, means for rotating the said brush, and means for protruding the brush below its shield, substantially as set forth. (19.) In combination, a brush mounted in a shield attached to a tube held stationary on a ladder and connected to a vacuum chamber in such a manner that it may be raised or depressed, a chain and sprocket-wheels and guide-pulleys for rotating the brush, a bell-crank lever for protruding the brush beyond the shield, and a rod for operating the said bell-crank lever, substantially as set forth. (20.) The combination and arrangement of parts comprising my improved dredge substantially as and for the purposes set forth, and illustrated on the drawings.

(Specification, 9s.; drawings, £1 11s.)

No. 12798.—20th July, 1900.—JOHN ALEXANDER ELLIS, of “Hill Crest,” White Horse Road, Surrey Hills, Victoria, Commercial Traveller. A new or improved appliance for aerating milk and other liquids.*

Claim.—A new or improved appliance for aerating milk or other liquids, consisting of an inverted vessel, bell, chamber, or a dome as A, having numerous small perforations as B in or about the top, and means for operating same, substantially as and for the purpose specified, and as illustrated in the drawings.

(Specification, 1s. 6d.; drawings, 3s.)

No. 12806.—23rd July, 1900.—JEREMIAH MCELLIGOTT, of Kawarau Gorge, near Cromwell, Otago, New Zealand, Miner. An improved appliance for saving the gold lost over the dredging-tables.

Claims.—(1.) In an improved appliance for saving the gold lost over the dredging-tables, a perpendicular axle, as described by drawings, descending through centre of appliance, as described, and turning revolving tub. (2.) Pipe F, as described, conveying stuff to be treated into branch pipes G. (3.) Branch pipes G, as described, perforated on opposite sides, which eject stuff treated on to and through perforated plates into quicksilver in the bottom of revolving tub. (4.) Revolving tub, as described, which acts against stationary suspending-rods. (5.) Stationary suspending rods which descend to within half an inch of bottom of revolving tub. (6.) The construction of appliance substantially as described, and illustrated in the drawings.

(Specification, 3s. 3d.; drawings, 3s.)

No. 12890.—17th August, 1900.—STANLEY OGDEN, of Victoria Street, Rangiora, New Zealand, Carpenter. An improved device for holding the sashes of railway-carriage or other windows in any required position.

Claim.—An eccentric operated on by a spring in any way, for the purpose of holding the sashes of railway-carriage or other windows in any required position, and preventing vibration, substantially as described, and as shown by drawings.

(Specification, 1s. 6d.; drawings, 3s.)

No. 12929.—28th August, 1900.—JAMES WATSON, of 27, Armagh Street, Christchurch, New Zealand, Sculptor. Improvements in ventilating ridge-capping.

Claims.—(1.) Ventilating ridge-capping, having a series of perforations on each side of same, and to which is attached a metal strip, shaped with a curve and angle bend. The curved portion of this metal strip forms a protection against rain and dust, as described, and as shown by the drawings. (2.) Ventilating ridge-capping, with a series of perforations on each side of same, the roll and apron being formed out of a single sheet of metal, and to which is attached a metal strip formed with a curve and small margin at angle-bend, as described, and as shown by the drawings.

(Specification, 3s. 3d.; drawings, 5s. 6d.)

No. 12933.—31st August, 1900.—HUGH FITZALIS KIRKPATRICK-PICARD, of 60, Gracechurch Street, London, England, Metallurgist. Improvements in or relating to the treatment of complex sulphide ores.*