APRIL 8.] THE NEW ZEALAND GAZETTE. 1011

No. 25567.—17th February, 1909.—THOMAS EDWARDS, of Webster Street, Ballarat, Victoria, Australia, Metallurgist. Improvements in apparatus and process for treatment of auriferous and other metalliferous matter by solvents.

Claim.—A chlorinator or like filtering-vessel having for discharge of tailings a central bottom outlet-pipe having means for its closure and allowing hydraulic sluicing from below, and flanged for attachment, as described.

[NOTE.—Here follow fourteen other claims.]

(Specification, 11s. 6d.; drawing, 2s.)

No. 25575.—17th February, 1909.—FREDERICK WALTON, of 114 Holborn, London, England, Engineer. Improvements relating to road-vehicle-suspension arrangements.

Claims.—(1.) In a road-vehicle-suspension arrangement, the combination with one or more tubular air-springs of the kind described, of a fluid-pressure chamber or reservoir which is of such a character that deflections of the springs are enabled to take place without the pressure of the fluid therein being materially increased, for the purpose specified. (2.) The aforesaid fluid-pressure chamber or reservoir provided with means for enabling the pressure within the tubular air-spring to be momentarily relieved when they experience large deflections and to be restored as they regain their normal condition, for the purpose specified. (3.) The aforesaid fluid-pressure chamber or reservoir, composed of elastic material or provided with resilient contrivances, for the purpose specified. (4.) The aforesaid fluid-pressure chamber or reservoir provided with a device for supplying the pressure fluid thereto, and with a device for relieving the pressure when it exceeds a predetermined limit, for the purpose specified. (5.) A road-vehicle-suspension arrangement, having its parts constructed, arranged, and adapted to operate substantially as described with reference to the drawings, for the purpose specified.

(Specification, 4s. 9d.; drawing, 1s.)

No. 25577.—17th February, 1909.—JOHN COLLINS CLANCY, of 909 St. Mark’s Avenue, Brooklyn, New York, United States of America, Chemist. Treatment of ores bearing precious metals.

Claim.—The method of treating pulverised ore containing precious metals, which consists in subjecting said ore to the action of a cyanide-solution, a soluble iodide, and a substance capable of yielding nascent oxygen in the presence of said solution—such, for example, as a soluble persulphate, ozone or nitrogen peroxide—substantially in the manner described, or in any equivalent way.

(Specification, 4s. 6d.)

No. 25581.—19th February, 1909.—EDWARD BRAZENALL, of Stanthorpe, Queensland, Australia, Engineer. Improvements in the lower tumbler gear that carried the chain of buckets in dredging-machines.

Extract from Specification.—The tumbler is made in two halves, and each half is composed of very hard cast iron. The cheeks, or side discs, are formed with bosses from which project radial spokes. A polygonal casting of peculiar construction is laid over the spokes so that the extremity of each spoke shall point to an interior angle of the polygon. In each interior angle of the polygon are two lugs which form a recess, and the ends of the spokes will enter these recesses. The polygon is internally provided with lugs whereby the polygon may be secured to the cheeks. When the polygonal casting is laid over the spokes, red-hot keys are driven into the spaces between the ends of the spokes and the bottoms of the recesses. The interstices may, moreover, be filled with molten metal, so as to afford the necessary rigidity to the combined construction. Drift-holes are provided whereby the keys may be driven out when the polygonal casting is worn out. When it is desired to renew the polygonal face of the tumbler the old polygonal casting may be broken with a sledge hammer, when it will fall to pieces, and a new polygonal casting secured in its place.

[NOTE.—The above extract from the specification is inserted in place of the claims.]

(Specification, 3s.; drawing, 1s.)

No. 25595.—24th February, 1909.—ALEXANDER JOHN ARBUCKLE, of 1 Main Street, Belgravia, near Johannesburg, Transvaal, Mechanical Engineer, and ALFRED OSBORNE, of 1 Main Street, Belgravia aforesaid, Mine-manager. Improvements in means for separating crushed-ore products or other comminuted solid matter from liquid.

Claim.—(1.) In apparatus such as described, in combination, a settling-vessel and a screw conveyer or screw conveyers for withdrawing the settled solids from the vessel, said conveyer or conveyers comprising a shaft or shafts upon which are provided helically disposed plates or projections forming an intermittent screw-thread or screw-threads, substantially as set forth.

[NOTE.—Here follow sixteen other claims.]

(Specification, £1; drawing, 3s.)

No. 25616.—24th February, 1909.—HENRY JAMES TURNER, and ERNEST EDWARD TURNER, trading as “Turner and Co.,” of 14 Maria Place, Wanganui, New Zealand, Cycle and Motor Engineers. An improved chain-wheel for cycles, with flange or a disc to attach to ordinary chain-wheel for forming a flange for trouser-guard.

Claim.—The improvement in chain-wheel made with a flange, or flange or disc made with plain flat surface or with recess as shown in fig. 1, or concave, convex, or bevelled or shaped to fit and attach on to an ordinary chain wheel to form the flange, that protects the rider’s clothing from grease or getting caught in the sprockets.

(Specification, 1s.; drawing, 1s.)

No. 25622.—2nd March, 1909.—FRANK SMITH, of Christchurch, New Zealand, Bootmaker. An improved construction of shoette.

Claims.—(1.) In shoettes, forming the upper of a single piece of leather or other material joined upon the inside of the instep, substantially as and for the purposes specified. (2.) In shoettes, an upper shaped to dispense with a seam upon the outer side of the shoette, substantially as specified. (3.) The improved construction of shoette, substantially as described and explained, and for the purposes specified.

(Specification, 2s.; drawing, 1s.)

No. 25630.—3rd March, 1909.—WILLIAM VANDYKE WATSON, of Matehuala, San Luis, Potosi, Mexico, Chemist and Metallurgist. Process for the extraction of precious metals from ores.

Claims.—(1.) A process for the selective dissolution of substances out of chemical combination, consisting in bringing the compounds containing said substances into ultimate contact with a solvent adapted to act selectively upon such substances, without the assistance of oxygen from any source whatever. (2.) A process for the extraction of precious metals from their ores, consisting in treating such ores with cyanide under exclusion of air. (3.) A process for the extraction of precious metals from their ores, consisting in subjecting such ores to the solvent action of cyanides under exclusion of oxygen. (4.) A process for the extraction of precious metals from their ores, consisting in subjecting such ores to the solvent action of cyanides under conditions precluding the presence of oxygen in quantities sufficient to affect the chemical reactions. (5.) A process for the extraction of precious metals from their ores, consisting in forming a solution of said precious metals by dissolving them in a diluted cyanide of an alkali under exclusion of air. (6.) A process for the extraction of precious metals from their ores, consisting in dissolving said metals out from said ores by means of cyanides, the process being conducted under exclusion of air. (7.) A process for the extraction of precious metals from their ores, consisting in dissolving said metals out from said ores in cyanide solvents in an airtight receptacle, bringing said solvents to permeate the mass of said ores by agitation in said vessel, separated by difference of specific weight said solvents and their resulting solution of said metals from said ores, substantially as described and set forth.

(Specification, 8s.)