622

THE NEW ZEALAND GAZETTE.

[No. 26

No. 13389.—7th February, 1901.—JOHN ALWENT CHAPMAN, of 49, Moray Place, Dunedin, New Zealand, Legal Manager (Mining). Improvements in working dredges on running water.

Claims.—(1.) In dredging for gold in rivers having currents strong enough for the purpose, the combination of a boat, punt, or pontoon carrying current-wheels which drive electric motors or dynamos by gearing for the purpose of generating a current of electricity, with an ordinary dredge having a motor capable of receiving and being driven by the current generated on the first pontoon, and thus working as a dredge for gold-dredging, substantially as described and shown, and as illustrated in the drawing. (2.) In gold-dredging, in combination, pontoons A, carrying current-wheels O, having water from the current guided to the said wheels by bell-mouthed guides D, and stopped off by doors E geared to and capable of driving a motor F, with any ordinary dredge B, capable of being driven by electricity so generated, substantially as shown and described, and as illustrated in the drawing.
(Specification, 8s.; drawings, 1s.)

No. 13390.—7th February, 1901.—ALEXANDER HAMILTON CHAPMAN, of Kurow, Oamaru, New Zealand, Sheep-farmer. An improved means for treating frozen meat of all kinds, or chilled meat, while the same is being thawed.

Claim.—In the process of defrosting meat, the use of coverings or envelopments of a material which is waterproof and airproof, or semi-airproof, substantially as and for the purposes set forth.
(Specification, 1s. 3d.)

No. 13392.—12th February, 1901.—JOHN MONTGOMERY, of Wellington, New Zealand, Commercial Traveller. An improved fastening for the straps of animal-covers, and other analogous purposes.

Claim.—In fastenings for the straps of horse- and animal-covers, and for other analogous purposes, an appliance containing a series of steps secured to the cover, in combination with a hook-shaped appliance, one member of which is provided with a returning projection, and the other end with a loop, to which the strap to be secured is fastened, as specified, and as illustrated in the sheet of drawings, and for the purposes set forth.
(Specification, 2s. 3d.; drawings, 1s.)

No. 13396.—18th February, 1901.—THE CLYDE CHEMICAL COMPANY (LIMITED), of 133, Pitt Street, Sydney, New South Wales (assignees of George Cox, of Burnett Street, Parramatta, New South Wales aforesaid, Manufacturing Chemist). Improvements in the means employed for the extraction of oxide of chromium from its ores, and its subsequent treatment to obtain soluble salts.

Claims.—(1.) The process of obtaining the soluble salts of oxide of chromium from ores containing oxide of chromium, by the decomposition of the said ore by the admixture of lime or hydrate of lime, in the manner described and for the purposes set forth. (2.) In the conversion of oxide of chromium into soluble chromates of potash or soda, the moulding of the pulverised ore, subsequent to its admixture with lime or hydrate of lime, into blocks, bricks, or briquettes, and the stacking of same into suitable kilns for treatment by fire in the same manner as for burning ordinary bricks, as and for the purposes set forth. (3.) In the manufacture of chromates and bichromates of potash or soda, the train of operations embracing the pulverisation of the crude ore, its admixture with lime-hydrate or carbonate of lime, and suchlike alkaline earths in equal proportions, and rendering the same plastic by the addition of water or a solution of sulphates or carbonates of potash or soda, and their conversion into moulded blocks, bricks, or briquettes, calcining the same at a sufficiently high temperature to produce decomposition, then the subsequent pulverisation of the calcined mixture and its incorporation with a suitable percentage of sulphates or carbonates of potash or soda, the proportions being ascertained by analysis, the conversion of the said mixture into blocks, bricks, or briquettes, and subjecting the same within a kiln to a low temperature sufficient to oxidize the oxide of chromium, and, finally, the further treatment by crushing and lixiviation with water to extract the soluble chromates, and the subsequent treatment by evaporation of the solution or liquor thus obtained, whereby the resultant product obtained is chromate and bichromate of potash or soda, as and for the purposes set forth. (4.) The process described, both of mixture and admixture, in combination with the system of treating the material by fire in the form of blocks, bricks, or briquettes in large quantities, in kilns suitable therefor.
(Specification, 4s.)

No. 13397.—13th February, 1901.—ASKIN MORRISON NICHOLAS, of Peak Hill, Western Australia, Mining Manager. An improved rotating filtering apparatus, principally for the separation of gold- and silver-bearing solutions from slimes and the like.

Claims.—(1.) The described rotating filtering apparatus principally for the separation of gold- and silver-bearing solutions from slimes and the like, consisting essentially of a comparatively large annular horizontally rotating trough provided with a filter-bed of sand preferably resting upon filter-cloth, the lower part of said trough being connected with a vacuum pump, substantially as and for the purposes described and explained, and as illustrated in the drawings. (2.) In a rotating filtering apparatus, principally for the separation of gold- and silver-bearing solutions from slimes and the like, an annular horizontally rotating trough provided with a filtering material such as sand, and connected with a vacuum pump, substantially as and for the purposes described and explained, and as illustrated in the drawings. (3.) In a rotating filtering apparatus, principally for the separation of gold- and silver-bearing solutions from slimes and the like, a horizontally rotating filter-bed of sand resting upon a layer of filter-cloth or other support, the lower part of the trough containing such sand connected with a vacuum pump, together with means for feeding slimes on to said filter-bed and subsequently removing them therefrom, substantially as and for the purposes described and explained, and as illustrated in the drawings. (4.) In a rotating filtering apparatus, principally for the separation of gold- and silver-bearing solutions from slimes and the like, an annular horizontally rotating trough containing a bed of filter-sand in combination with a vertical hollow shaft with which the bottom or lower part of said trough is connected by a series of radial pipes, said hollow shaft being connected with a vacuum pump, substantially as and for the purposes described and explained, and as illustrated in the drawings. (5.) In a rotating filtering apparatus, principally for the separation of gold- and silver-bearing solutions from slimes and the like, a slimes-supply launder delivering into a feed-hopper discharging on to an inclined adjustable platform whereby the slimes are conducted on to the surface of the filter-bed, substantially as and for the purposes described and explained, and as illustrated in the drawings. (6.) In a rotating filtering apparatus, principally for the separation of gold- and silver-bearing solutions from slimes and the like, an inclined adjustable slimes-supply platform in combination with a curved baffle-plate on to which the slimes are discharged by said platform for delivery on to the surface of the filter-bed, substantially as and for the purposes described and explained, and as illustrated in the drawings. (7.) In a rotating filtering apparatus, principally for the separation of gold- and silver-bearing solutions from slimes and the like, an inclined adjustable scraper for the removal of the slimes from the filter-bed after the gold- and silver-bearing solutions have been withdrawn, in combination with a screw or other conveyer, substantially as and for the purposes described and explained, and as illustrated in the drawings. (8.) In a rotating filtering apparatus, principally for the separation of gold- and silver-bearing solutions from slimes and the like, a sand-hopper having an adjustably sliding door situated immediately behind the apparatus used for removing the slimes from the filter-bed, for the purpose of replenishing the sand removed by the scraper, substantially as and for the purposes described and explained, and as illustrated in the drawings.
(Specification, 8s.; drawings, 2s.)

No. 13399.—13th February, 1901.—FREDERICK EDWARD NEWTH, of Palmerston North, New Zealand, Printer. An improved handle for meat dishes and the like.

Claim.—An improved handle for meat-dishes, sauce-pans, frying-pans, and other such cooking-utensils, consisting of a slot or catch fixed to said utensil, upon which is fitted or adjusted a removable handle, substantially as illustrated and described.
(Specification, 1s. 6d.; drawings, 1s.)

No. 13404.—14th February, 1901.—JOSEPH WILKINSON, of Glen Mill, Burton-in-Lonsdale, York, England, Photographer. Improvements in producing mixtures of vaporised oil and air for heating, lighting, and motor purposes.

Claim.—The method of obtaining a self-burning mixture of vaporised oil and air by driving or drawing air through the described apparatus, in which apparatus is introduced a mixture of benzoline and paraffin oil, substantially as and in the proportions described.
(Specification, 8s.; drawings, 3s.)