146
THE NEW ZEALAND GAZETTE.
[No. 6

No. 14389.—30th December, 1901.—JAMES BISHOP, of Wellington, New Zealand, Consulting Mining Engineer. Improved dredging-apparatus.

Claims.—(1.) In dredging-apparatus, a grab-hook pivoted to a specially designed link so as to move freely forward, thus automatically increasing the space between the hooks and the next bucket behind them, substantially as and for the purpose described. (2.) In dredging-apparatus, a grab-hook attached to the links of the bucket-chain by a pivoting pin or pins instead of being rigidly attached, substantially as and for the purpose described.
(Specification, 1s. 3d.; drawings, 1s.)

No. 14402.—6th January, 1902.—PORCHERINE, LIMITED, of 11, Queen Victoria street, London, England (assignees of Paul Porchère, of 34, Rue Ferrandiere, Lyons, France, Chemist. Improvements in the production of sweetening-liquids.

Claims.—(1.) The preparation of sweetening-liquids by—(a) mixing one or two parts of anhydro-benzoic-orthosulphamide or paraphenetol-carbamide or of their salts with two or three parts of glycerine of a density of about 20° to 30°, the mixing being operated at a high temperature of the glycerine; (b) mixing one or two parts of anhydro-benzoic-orthosulphamide or paraphenetol-carbamide or of their salts with two or three parts of water, the mixing being operated at a high temperature of the water; (c) mixing one or two parts of anhydro-benzoic-orthosulphamide or paraphenetol-carbamide or of their salts with two or three parts of alcohol, the mixing being operated at a high temperature of the alcohol; (d) mixing one or two parts of anhydro-benzoic-orthosulphamide or paraphenetol-carbamide or of their salts with two or three parts of glucose, the mixing being operated at a high temperature of the glucose; (e) mixing one or two parts of anhydro-benzoic-orthosulphamide or paraphenetol-carbamide or of their salts with two or three parts of syrup of sugar, the mixing being operated at a high temperature of the syrup of sugar. (2.) The combination of such liquids, prepared as described in claim 1, with cane-sugar, coarse brown sugar, glucose, perfumed essences, acids, or other substances, in order to modify the density, the reaction, the colour, or odour of the preparation.
(Specification, 2s. 3d.)

No. 14403.—6th January, 1902.—BALFOUR FRASER MCTEAR, of Brook Cottage, Rainhill, Lancaster, England, Engineer. Improvements in or connected with the manufacture of steel or hard-metal tubes or tubular bodies.

Claims.—(1.) The described improvement in the manufacture of tubes or hollow bodies, consisting in producing tubes or hollow bodies of equal thickness throughout from hollow rough blanks or tubes by rolling same circularly while in a highly heated state at a high velocity between internal and external rollers having positive adjustment in relation to each other, and by external side-supporting rollers, whereby, by a small pressure and high velocity, a tube-blank can be trued or made of equal thickness throughout, and its thickness reduced rapidly, substantially as set forth. (2.) A machine for rolling tubes or hollow bodies or cylinders circularly, and internally and externally, comprising external and internal rollers, and external side-supporting rollers having an oblique movement, this oblique movement being such that the said side rollers always support the body being rolled at or near the extreme diameter or sides, and follow this diameter as the body increases. (3.) A machine for rolling tubes or hollow bodies or cylinders circularly, and internally and externally, comprising external and internal rollers, and external side-supporting rollers, the said side-supporting rollers having their axes adapted to be tilted in opposite directions, to prevent the body being rolled from moving longitudinally along the rolling rollers, substantially as described. (4.) In the manufacture of tubes or hollow bodies or cylinders, the described improvement, consisting in effecting the removal of scale and other matters from the internal surface of the hot body to be operated on prior to rolling, by scraping it by one end of the internal roller employed, which is adapted to act as a scraper, in passing said roller through the body preparatory to rolling, substantially as described. (5.) In the manufacture of tubes or hollow bodies or cylinders, the described improvement, consisting in preventing the interior of the tube being pitted or of irregular surface by projecting a jet of fluid longitudinally on to and along the interior of the tube or body, and through same, from one end to the other, while it is being rolled between inside and outside rollers, and in a highly heated state. (6.) In the manufacture of tubes or hollow bodies or cylinders, the improvement consisting in giving such tubes a black-planished or smooth surface by rolling the hollow body between internal and external rollers while red-hot, at a high velocity, until the thickness of metal or diameter required is reached, and then continuing to roll the body in the same manner, but without reducing its thickness materially, and subjecting its surface to the action of water poured on to it, until it is black and hard, and its surfaces planished. (7.) The process of manufacturing seamless tubes or cylinders consisting in first piercing a solid billet or body of steel or hard metal by a piercing mandril forced axially through it while in a red-hot state, and then rolling said pierced body or billet while in a red-hot state, circumferentially internally and externally, by rollers having positive adjustment in relation to each other, and adapted to act only on the thicker parts of the tube or hollow body, until said thicker parts are rolled off, and the thickness of the walls is uniform, substantially as described. (8.) A machine for rolling tubes or hollow bodies or cylinders circularly, and internally and externally, comprising, in combination, a large horizontal external lower driven roller, and upper internal small non-driven loose roller, directly above the lower roller, for rolling on the internal surfaces, and adjusted vertically by positive adjusting means, and external side-supporting rollers on either side, for supporting the sides of the hollow cylinder, adapted to be moved away from and towards the vertical longitudinal plane of the machine.
(Specification, 10s.; drawings, 4s.)

No. 14404.—7th January, 1902.—WILLIAM THOMAS LOCKE TRAVERS, of Wellington, New Zealand, Barrister and Solicitor (nominee of Benjamin Garver Lamme, of 230, Stratford Avenue, Pittsburg, Pennsylvania, United States of America, Electrical Engineer). Improvements in windings for electrical machines.

Claim.—For electrical machines, bar windings having their ends spaced apart in the radial direction and connected by double strap connectors in the manner described, and shown in the drawings.
(Specification, 3s.; drawings, 1s.)

No. 14410.—10th January, 1902.—ADOLF GENTZSCH, of 1, Siftgasse, Vienna, Austria, Mineralogist. Improvements in the manufacture of a gutta-percha substitute.

Extract from Specification.—The present invention has reference to improvements in the manufacture of a gutta-percha substitute, and relates more especially to a process for obtaining artificial gutta-percha by mixing and kneading, with or without the addition of oils, caoutchouc with wax of a high natural melting-point, or the melting-point of which has been raised artificially by a special process, which consists in adding water, alone or with an admixture of certain salts, to the heated wax. But not only wax, but also resin, asphalt, tar, and pitch, furnish, according to the present invention, a substitute for gutta-percha when mixed with caoutchouc, if these substances have been treated according to the referred-to special process, whereby the melting-point of the wax, resin, and asphalt is raised, and the inspissation of the tar and pitch enhanced.
[NOTE.—The number and length of the claims in this case preclude them from being printed, and the foregoing extract from the descriptive part of the specification is inserted instead.]
(Specification, 2s. 6d.)

No. 14412.—10th January, 1902.—GUSTAV HUHN, of 15, Cuxhavenerstrasse, Berlin, Germany, Manufacturer. Improvements in metallic packing-rings.

Claims.—(1.) A metallic packing for stuffing-boxes, consisting of hollow metal rings of circular cross-section, substantially as described and shown, and for the purpose set forth. (2.) A metallic packing for stuffing-boxes as claimed under (1), consisting of hollow metal rings filled with a suitable lubricant, and provided with openings for the outflow of the lubricant, the rings made of a metal composition consisting of an easily fusible metal with a metal the temperature of fusion of which is high and of sufficient hardness, substantially as described and shown, and for the purpose set forth. (3.) In a metallic packing-ring, as claimed under No. 2, the application of an outer cover of wax or other material the fusion of which takes place at over 50° C., only for the purpose of preventing the outflow of the lubricant during transport, substantially as described and shown, and for the purpose set forth. (4.) In combination with metallic packing-rings as claimed under No. 2, the improvement of the stuffing-box therein, consisting that a cylinder closed at the bottom, composed of two parts, is inserted into the stuffing-box, and closely fitting the stuffing-box in size and shape, and connected with the same by screws screwed through the upper flange of the cylinder for the purpose of facilitating the removal of the packing from the stuffing-box, substantially as described and shown, and for the purpose set forth. (5.) A modification in the construction of the metallic