Oct. 3.] THE NEW ZEALAND GAZETTE. 1949

by reason of the inclined shoulders of the arms, or inclined shoulder in the bottle-neck, exert a further downward pressure on the sealing-member, thereby making an absolutely perfect seal. To remove the seal the operation is simple, it only being necessary to pry the tongue out of the depression with the finger, thus permitting the arms to be sprung toward each other for a sufficient distance to disengage the shoulders of the securing-member from the shoulder in the bottle-neck, or, in the form shown in Figs. 6 and 7, to simply press the arms together, when the seal will be readily removable. It is highly desirable that a seal of this character be not destroyed upon unsealing the bottle for the first time, and it is obvious that the seal herein described may be reused as many times as desired, thus, for instance, enabling the portion of the contents of the bottle not desired for immediate use to be kept perfectly fresh and its life retained.

[NOTE.—The number and length of the claims in this case preclude them from being printed, and the foregoing extract from the specification is inserted instead.]

(Specification, 8s. 6d.; drawings, 1s.)

No. 14043.—24th September, 1901.—WILLIAM CARTER BRAY, of Hackney, South Australia, Printer. A new or improved interchangeable book-cover, and book-heel to be used in connection therewith.

Claims.—(1.) In an improved interchangeable book-cover, a butt portion provided with retaining-lugs such as B² for the reception and retention of retention-bars E connected with the book-heel, substantially as described and illustrated. (2.) In an improved interchangeable book-cover, a butt portion such as B provided with flanges such as B³ for the reception, retention, and adjustment of the portion of the corresponding butt B¹, substantially as described and illustrated. (3.) In an improved interchangeable book-cover, a knife or cutter (preferably of tempered wire) arranged substantially as described and illustrated, as and for the purposes set forth. (4.) In book-heel for use in conjunction with an improved interchangeable cover characterized by the parts claimed in claim 1, retention-bars such as E, the said bars being riveted, stapled, or otherwise securely fastened to the heel in such a manner as to permit of their admission in retaining-lugs of an interchangeable cover, substantially as described and as illustrated. (5.) The combination of an interchangeable cover provided with retaining-lugs such as B², and a book-heel provided with retention-bars such as E, substantially as described and illustrated. (6.) The combination of an interchangeable book-cover, comprising the hinged flaps A and A¹, the butt ends B and B¹, the retaining-lugs B², and the flanges B³, with a book and book-heel, said heel being provided with retention-bars E, substantially as described and illustrated, as and for the purposes set forth, as a combination of parts.

(Specification, 5s.; drawings, 1s.)

No. 14044.—24th September, 1901.—JACOB CHRISTIAN HANSEN-ELLEHAMMER, of Istedgade, 99, Copenhagen, Denmark, Mechanical Engineer. An improved method and apparatus for filling cigarette-tubes with tobacco.

Claims.—(1.) A method of filling cigarette-tubes with tobacco by means of a screw-shaped wire, in which the said wire is screwed into the previously divided and compressed cylindrical mass of tobacco between the press-moulds, and thereafter through an axial displacement in known manner introduced into the cigarette-tube, and finally screwed out of the finished cigarette. (2.) Apparatus for carrying out the method indicated in claim 1, in which the wire, when it is pushed towards the cigarette-tube, is first simultaneously turned and axially displaced and afterwards only displaced axially, whilst the said wire, when removed from the cigarette, is first screwed out of same and then axially displaced without being turned. (3.) An operating-mechanism for the apparatus indicated in claim 2, consisting of a body m mounted turnably upon a movable slide g, to which body is fixed the screw-shaped wire p, and which is provided with a screw-shaped groove n of the same pitch as the wire, in combination with a pin r projecting into said groove and capable at suitable moments of being held firm as regards the movable slide or released therefrom in such a manner that a screwing and a straight motion is alternately imparted to the wire. (4.) A mechanism, as described in claim 2, in which the movable slide g is provided with two hooks x, y, and the pin r is fixed to a slide-bar g, arranged to slide longitudinally in bearings on the slide g in such a manner that two spring arms s, t, may engage the pin r and keep it firm for the purpose of allowing the wire p to turn, whilst the said pin is again released from the spring arms when the hooks x, y, press against the projections u, v, of the said arms.

(Specification, 4s.; drawings, 1s.)

No. 14045.—24th September, 1901.—DANIEL HURST, of 100b, Queen Victoria Street, London, E.C., England, Sanitary Engineer. Improved tube- and hose-joint.

Claims.—(1.) For making a butt joint in flexible or malleable tubes, the combination of conical internal ferrules, external shouldered and screwed sleeves, and a coupling-nut, substantially as and for the purpose set forth and shown. (2.) For making a butt joint in woven hose pipe, the combination of internal ferrules, indiarubber external sleeves or lappings, external shouldered and screwed sleeves, and a coupling-nut, substantially as and for the purpose set forth and shown.

(Specification, 2s. 3d.; drawings, 1s.)

No. 14046.—24th September, 1901.—CHARLES ROGERS, of 24, Gellibrand Street, Kew, Victoria, Manufacturing Chemist, and ALICE MARY OSWALD, of “Merton,” Orrong Road, Caulfield, Victoria, Gentlewoman. Improved process for the extraction and recovery of zinc from sulphide ores or tailings.

Claims.—(1.) Improved process for the extraction and recovery of zinc from sulphide ores or tailings, consisting in subjecting same to a partial sulphatising roast in a furnace having a closed chamber or chambers, leaching out the resulting sulphate of zinc, repeating said operations until sufficient zinc is extracted, recovering same as a sulphide precipitate by a solution of calcium-polysulphide, and leaving a smeltable product, substantially as described. (2.) Subjecting zinc-sulphide ores or tailings to a partial sulphatising roast in a furnace having a closed chamber or chambers, discharging same whilst hot into water, leaching there-with and with dilute sulphuric-acid solution, returning the material (preferably through a heated pipe) to the closed chamber or chambers, and repeating the operation until sufficient zinc and sulphur removed, substantially as described. (3.) The use of calcium-polysulphide for the precipitation of zinc-sulphide from sulphate solution, substantially as described.

(Specification, 3s. 6d.)

No. 14047.—24th September, 1901.—GUSTAVE A. OVERSTROM, of 311, Maple Street, Anaconda, United States of America, Mining Engineer. Ore-concentrating tables.

Extracts from Specification.—This invention relates to ore-concentrating tables. The object of the invention is to simplify and improve the construction of apparatus of this class, whereby it is rendered more efficient in effecting the concentration of the mineral. The invention consists substantially in the construction, combination, location, and arrangement of parts, all as will be more fully hereinafter set forth, as shown in the drawings, and finally pointed out in the claims. In the operation of ore-concentrating tables, the crushed ore, either with or without subjecting the same to hydraulic or other sizers, is deposited upon the surface of the table. A rectilinear reciprocatory movement is imparted to the table, and at the same time a flow of wash-water is maintained over the top of the table and transverse to the line of rectilinear reciprocations imparted thereto. The mineral portion of the ore, being heaviest, gravitates to the bottom of the mass of ore delivered upon the table, while the rock, dirt, shale, gangue, and the like, being lighter, will remain on top of the mass, and, under the combined influence of the reciprocatory movements imparted to the table and the flow of wash-water, the particles of mineral will be advanced in the direction of the reciprocatory movements, while the dirt, rock, and the like will be separated from the mineral and washed away with the wash-water. Since under the influence of the combined forces of the rectilinear reciprocatory movements and the transversely flowing wash-water the general trend of travel or advancement of the mineral and of the rock and dirt is in the direction of the component of these forces, and hence in a direction somewhat diagonal or inclined with respect to the line of reciprocatory movement imparted to the table, I have found that the best results are attained by employing a table having parallel sides and parallel ends, but with the ends inclined with respect to the sides. I have also found the best results are attainable when the line of reciprocatory movements imparted to the table are in a direction substantially diagonal with respect to the table. Therefore, in carrying out my invention, reference sign A designates a table having its sides parallel and having its ends parallel, but with the ends inclined with respect to the sides. I have also found that the best results are attainable when the movement of the table on its forward stroke consumes less time than the movement thereof on its rearward stroke during the rectilinear reciprocations thereof.

[NOTE.—The number and length of the claims in this case preclude them from being printed, and the foregoing extract from the specification is inserted instead.]

(Specification, 13s.; drawings, 4s.)