384
THE NEW ZEALAND GAZETTE.
[No. 11

drawings. (2.) Apparatus for the purpose indicated, comprising a conical drum revolvably mounted upon a framing, and bolts projectable from the smaller diameter of said drum, the inner ends of said bolts being connected to a revolvable disc, with means for operating said disc, substantially as specified.
(Specification, 2s.; drawing, 1s.)

No. 18878.—21st December, 1904.—THOMAS EDWARDS, of Sebastopol, Ballarat, Victoria, Australia, Metallurgist. Improvements in mechanically rabbled ore-roasting furnaces and connected therewith.

Extract from Specification.—I use superimposed hearths, with apertured roofs or arches over them, and a plurality of series of rabbles to stir the ore on said hearths, each rabble having (at different heights) feet or means to rabble such successive hearths, such a rabble being termed in the claims a multiple rabble for brevity. Means are adopted to regulate the heat at different parts of the furnace, and to economise or utilise the heat of the hot gases which are discharged from the said hearths; but the invention is not limited to the number or design of long hearths shown, nor to the number of lines of multiple rabbles, nor to any feature similarly variable in position, size, or form. The details of the furnace may embody additions of well-known parts not claimed.
[NOTE.—The above extract from the specification is inserted in place of the claims.]
(Specification, 12s.; drawings, 2s.)

No. 18884.—22nd December, 1904.—JOHAN ABRAHAM OHLSSON, of 45, Broadway, New York, United States of America, Engineer. Improvements in liners for centrifugal liquid-separators.

Claim.—In such liners for centrifugal vessels as consist of walls, plates, or the like, placed after each other around the axis of the centrifugal vessel, and which walls, plates, &c., are rotatable relatively to axes located eccentrically in the centrifugal vessel, the arrangement that two or more walls, &c., in groups have a common axis relatively to which the walls, &c., belonging to the same group can be turned independent of each other.
(Specification, 2s.; drawing, 1s.)

No. 18890.—21st December, 1904.—HERBERT WILLIAM DE BAUGH, of Esplanade Road, Mount Eden, near Auckland, New Zealand, Commercial Traveller. An improved non-conductor liner for portable washing-coppers and portable steam-cookers or generators.

Claims.—(1.) The non-conductor liner specified, made of infusorial earth or kieselguhr prepared, shaped, pressed, and baked for the purpose set forth, substantially as described. (2.) The use of infusorial earth or kieselguhr mixed with sufficient water to allow it to be brought to boiling-point by the application of any suitable form of heat, the shaping into liners the infusorial earth, thus mixed and boiled, in plaster-of-paris moulds after being suitably drained, the subjecting the liners thus shaped to the pressure specified, and thereafter baking and cooling the liners for the purpose set forth, substantially as described. (3.) The treating, arranging, and shaping infusorial earth or kieselguhr mixed with a sufficiency of water, in the manner and for the purpose set forth, substantially as described.
(Specification, 2s. 9d.)

No. 18909.—31st December, 1904.—JOHANN SIEGMUND MARTIN JACOBSEN, of Halifax Street, Nelson, New Zealand, Metallurgist. Improved method or process for the production of metals from their ores.

Claims.—(1.) Steps in a process for the purpose indicated, consisting in mixing finely divided ore with half its weight of salt, subjecting the mixture to heat in a crucible, immersing the resultant material in water and washing it therein, adding soda equal to half the weight of the material and a little charcoal, and subjecting the mixture to heat in a crucible, again crushing the resultant material and remelting it in a furnace, substantially as specified. (2.) A step in a process for the purpose indicated, consisting in mixing the ore with half its weight of common salt and subjecting the mixture to heat in a crucible, washing and crushing the resulting material for further treatment, substantially as specified.
(Specification, 2s.)

No. 18912.—5th January, 1905.—HANS THEODORE HANSEN, of 417, Wells Building, Milwaukee, Wisconsin, United States of America, Manufacturer. Driving gear for motor vehicles.

Claims.—(1.) A driving gear for motor vehicles characterized by a driving-shaft, a driving-wheel mounted so as to oscillate with respect to the axis of the driving-shaft, a universal joint connection between the shaft and the wheel comprising outwardly extending forks secured to the driving-shaft and having notches in their ends, a part of the hub having inwardly extending forks provided with end notches, and a block having two pairs of gudgeons in transverse planes, said pairs of gudgeons being arranged in the end notches of the shaft and hub respectively. (2.) The device of claim 1 characterized by the hub of the wheel being journaled upon a bearing-ring which is pivoted upon vertically arranged end forks of an axle.
(Specification, 2s. 6d.; drawing, 1s.)

No. 18913.—5th January, 1905.—HANS THEODORE HANSEN, of 247, Lake Street, Milwaukee, Wisconsin, United States of America, Manufacturer. Driving gear for motor vehicles and the like.

Claims.—(1.) The driving gear for motor vehicles and the like which is characterized by having the driven wheel rotatable in a horizontal plane, and having a universal joint interposed between the wheel and the axle, the central member of the universal joint being composed of two parts, one of which is secured to the axle and the other of which can be removed with the wheel. (2.) The driving gear for motor vehicles and the like which is characterized by having the driven wheel pivoted to swing in a horizontal plane, the end of the driving axle being forked and having a non-circular block, a second yoke-shaped block being secured to the wheel and removable therewith and engaging the first block. (3.) The driving gear for motor vehicles and the like which is characterized by having the driven wheel pivoted to swing in a horizontal plane, a two-part plate being secured to the wheel, the two parts of said plate holding pivotally between them a yoke-shaped block, the said block engaging a second block pivoted between the forked ends of the driving axle. (4.) The driving gear for motor vehicles and the like which is characterized by having a bearing-ring pivoted to the frame of the machine, the upper gudgeon upon which said ring is pivoted being inverted frusto-conical and the lower one being conical.
(Specification, 3s. 6d.; drawing, 1s.)

No. 18915.—5th January, 1905.—AMMONAL EXPLOSIVES, LIMITED, of 29, Great St. Helens, London, England (assignees of Hans Ritter von Dahmen, of Stammgasse, 9, Vienna, Austria, Retired Police Official. A new or improved process for the manufacture of explosives of the nitrate of ammonia group.

Claim.—A process for manufacturing explosives of the nitrate of ammonia group which contain a fusible component or components having a melting-point below the decomposition temperature of the ammonium nitrate, said process consisting in finely dividing and mixing the components of the explosive, compressing said components under high pressure into suitable shapes, heating same to a temperature slightly below the melting-point of the fusible component or components, immersing them in a bath of the same substance as said fusible component or components, and subsequently cooling the mass.
(Specification, 3s. 6d.)

No. 18916.—5th January, 1905.—GUSTAF GRÖNDAL, of Djursholm, Sweden, Engineer. An improved magnetic-ore separator.

Claims.—(1.) A magnetic separator for powdered ore suspended in water, characterized by an upright cylindrical electro-magnet having its pole pieces directed downwards in the shape of concentric rings (E, F), a rapidly rotating disc (X) beneath the pole pieces, an annular vessel (K) located beneath the said disc and provided with an adjustable discharge opening, and an inlet for the suspended material inside or outside of the said annular vessel, as well as a discharge outside or inside of it. (2.) A form of the magnetic-ore separator according to the claim 1, consisting of an upright cylindrical electro-magnet, having its pole pieces directed downwards in the shape of concentric rings (E, F), a rapidly rotating disc (X) beneath the pole pieces, and beneath the said disc a funnel (L) provided with a conical disperser (V) inserted in it and with tubes (S, O and U, T) for the suspended material and for water opening into the lower part of the funnel, another funnel (K) surrounding the first funnel (L) and having a discharge tube (Q) adjustable by means of a valve (R), a third funnel (J) surrounding the second funnel (K) having a discharge tube (P), and a collecting-vessel surrounding the circumference of the disc (X).
(Specification, 3s. 6d.; drawing, 1s.)