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THE NEW ZEALAND GAZETTE.
[No. 15

No. 13302.—8th January, 1901.—JAMES PALMER CAMPBELL, of Wellington, New Zealand, Registered Patent Agent (nominee of Cyrus Robinson, of Swissvale Avenue, Edgewood Park, Pennsylvania, United States of America, Engineer). Improvements in fluid-pressure engines.

Claims.—(1.) A device for stopping a fluid pressure engine when the speed thereof increases beyond a certain limit, and for restarting the same, consisting of a valve in the supply-pipe which is automatically actuated to close said pipe as soon as the limiting speed is reached, and which can be actuated to open said pipe by means the operation of which can be controlled from a distant point, substantially as described. (2.) In the supply-pipe of a fluid-pressure engine, a valve which is opened by the fluid pressure normally existing in the supply-pipe, but which can be closed by the application of fluid pressure to one side of a piston operating the valve, this application being governed by a manually operated governing-device located at a more or less distant point, and also by a mechanical device which operates when the speed of the engine exceeds a predetermined limit, substantially as described. (3.) In a fluid-pressure engine, a valve tripping lever embodying one turn of a spiral and projecting therefrom in opposite directions, substantially as and for the purpose described. (4.) For stopping and restarting a fluid-pressure engine, apparatus constructed and operated substantially as described with reference to Figs. 1 to 9 or to Fig. 10 of the drawings.
(Specification, 7s.; drawings, 2s.)

No. 13307.—8th January, 1901.—ALEXANDER SPENCER, of 77, Cannon Street, London, England, Engineer. Improvements in means for enabling passengers in a railway-train to apply the brakes and attract the attention of the driver and guards.

Claims.—(1.) For enabling signals to be given by passengers in railway-trains to drivers or guards of same, the arrangement in combination of parts described with reference to and shown in Figs. 1 to 8 of the drawings, or modified according to Figs. 9 and 10, or to Figs. 11 and 12, or to Figs. 12ª and 12ᵇ, or to Fig. 13, or to Figs. 14 and 15, or to Fig. 16. (2.) In an arrangement of the kind referred to for enabling signals to be given by passengers in railway-trains to drivers or guards of same, the construction and arrangement in combination as described with reference to Figs. 3 to 5, inclusive, of the parts therein illustrated. (3.) In an arrangement of the kind referred to for enabling signals to be given by passengers in railway-trains to drivers or guards of same, the device described with reference to and illustrated in Figs. 9 and 10 of the drawings, for the purpose specified.
(Specification, 7s. 6d.; drawings, 7s.)

No. 13309.—7th January, 1901.—THOMAS HEWTON, of Waianakarua, New Zealand, Miller. An improved apparatus for straining wire.

Claims.—(1.) In wire-strainers, the combination of a fixed clip A³, secured to and as part of a straight sliding-bar A, with a movable clip sliding on the said bar, drawn forward by the lever G, working on the movable sliding fulcrum G¹, substantially as shown and described and for the purposes as set forth. (2.) In wire-strainers, a fixed clip or vice A³, a movable clip or vice D, F, for straining wires in combination with a supplementary clip D¹, for holding a wire partly stretched till more can be tightened, substantially as set forth. (3.) In combination, in an apparatus for wire-straining, movable and fixed clips having several grooves for wearing; the movable clip sliding on the main bar by a lever and link, and the handle being formed to be used as a cutter and twister either before or after straining, all substantially as set forth in the drawing and as described and explained.
(Specification, 2s. 3d.; drawings, 2s.)

No. 13313.—15th January, 1901.—SIDNEY TRIVICK, of 2, Lydon Road, Clapham, Surrey, England, Metallurgist. Improvements in and connected with solvents for metals, and the treatment of gold and other ores for the extraction of the contained metal.

Claims.—(1.) Improved solvent for metals, and for the treatment of gold and other ores for the extraction of the contained metals, formed by the addition of a solution of calcium-hypochlorite, obtained by adding water to chloride of lime, and then mixing the clear solution thus obtained with aqueous solution of ferric chloride so long as the hydrated ferric-oxide precipitate redissolves, substantially as described. (2.) Improved solvents for metals, and for the treatment of gold and other ores for the extraction of the contained metals, consisting of an aqueous solution of one of the salts as classified herein, as, for instance, ferric sulphate, manganese-sulphate, manganese-chloride, aluminium-chloride, aluminium-sulphate, oxalic acid, and the like, which, on the addition of one of the hypochlorites, either of calcium or of the alkali metals, evolves chlorine, or oxygen compounds of chlorine, substantially as set forth. (3.) Improved means for dissolving metals, and for the treatment of gold and other ores for the extraction of the contained metals, consisting in the addition of one of the salts, as herein classified, in the solid state, well mixed with the ore or other material, and adding thereto a solution of calcium-hypochlorite, or of one of the hypochlorites of the alkali metals, dissolved in water alone and used as a lixiviating solution; or of chloride of lime mixed in the solid state with the ore or material, and a solution of one of the salts used as a lixiviating solution; or of both the salt and chloride of lime mixed in the solid state with the ore or other material and water alone, or carrying sodium-chloride in solution, used as a lixiviating solution, substantially as and for the purposes set forth.
(Specification, 11s.)

No. 13315.—15th January, 1901. — EDWIN CLAYTON POHLÉ, of 2521, Vine Street, Denver, Colorado, United States of America, Assayer, and STUART OROASDALE, of 1574, York Street, Denver aforesaid, Chemist. Process for the reduction of refractory ores.

Claims.—(1.) The process which consists in effecting a mixture containing the ore, sulphur, and a haloid of an alkaline or alkaline-earth metal, the relative proportions of the materials being substantially those quantitatively requisite to produce, when heated in the presence of oxygen, a haloid of the metal or metals to be extracted from the ore and a sulphate of the alkaline or alkaline-earth metal; subjecting the mixture to an oxidizing roast with agitation at a temperature sufficient to effect the reaction mentioned; and volatilising and recovering the metal-values as haloids or oxy-haloids, substantially as described. (2.) The process which consists in preparing a charge containing the ore, sulphur, and a chloride of an alkaline or alkaline-earth metal, the relative proportions of the materials being substantially those quantitatively requisite to produce, when heated in the presence of oxygen, a chloride of the metal or metals to be extracted from the ore and a sulphate of the alkaline or alkaline-earth metals; subjecting the charge to an oxidizing roast with agitation at a temperature sufficient to effect the reaction mentioned; and volatilising and recovering the metal-values as chlorides or oxy-chlorides, substantially as described. (3.) The process which consists in preparing a charge containing the ore, sulphur, and a chloride of an alkaline or alkaline-earth metal, the relative proportions of the materials being substantially those quantitatively requisite to produce, when heated in the presence of oxygen, a chloride of the metal or metals to be extracted from the ore and a sulphate of the alkaline or alkaline-earth metal; subjecting the mixture to an oxidizing roast with agitation at a temperature sufficient to effect the reaction mentioned; and volatilising and recovering the metallic values as chlorides and oxy-chlorides from the fumes liberated by subjecting them to the action of water, substantially as described. (4.) The process which consists in preparing a charge containing the ore, sulphur, and a chloride of an alkaline or alkaline-earth metal, the relative proportions of the materials being substantially those quantitatively requisite to produce, when heated in the presence of oxygen, a chloride of the metal or metals to be extracted from the ore and a sulphate of the alkaline or alkaline-earth metal; subjecting the mixture to an oxidizing roast with agitation at a temperature sufficient to effect the reaction mentioned; and volatilising and recovering the metallic values as chlorides or oxy-chlorides from the fumes liberated by subjecting them to filtration and to the action of water, substantially as described. (5.) The process which consists in preparing a charge containing the ore, sulphur, and a chloride of an alkaline or alkaline-earth metal, the relative proportions of the materials being substantially those quantitatively requisite to produce, when heated in the presence of oxygen, a chloride of the metal or metals to be extracted from the ore and a sulphate of the alkaline or alkaline-earth metal; subjecting the mixture to an oxidizing roast with agitation at a temperature above 900° centigrade; and volatilising and recovering the metallic values as chlorides and oxy-chlorides from the fumes liberated, substantially as described.
(Specification, 3s. 6d.)