Jan. 23.] THE NEW ZEALAND GAZETTE. 243

various elevations. It is also an object of this invention to provide an endless main conveyer arranged to discharge upon a superimposed auxiliary conveyer constructed to be transported above the line of travel of said main conveyer, and provided with means travelling therewith to effect said discharge. Still another object of the invention is to provide an auxiliary conveyer driven by a main conveyer normally occupying a plane below that of said auxiliary conveyer.

[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, £1; drawings, 5s.)

No. 15839.—8th January, 1903.—JOHN THOMAS YOUNG, of 120, Bay View Street, Williamstown, Victoria, Coachbuilder, and JOHN WREN, of Studley House, Studley Park, Kew, Victoria, Financier (assignees of the said John Thomas Young and Charles Meredith Young, of Kew Street, North Bendigo, Victoria, Carpenter and Joiner). Improved automatic spring catch for sliding sashes of windows, louvres, &c.

Claims.—(1.) An improved automatic spring catch for sliding sashes of windows, louvres, &c., consisting in a spring bolt mounted within a casing on the frame and having a bevelled head, in combination with a metallic wearing or catch plate on the stile of the sash, said plate having a series of bevelled recesses, substantially as set forth, and illustrated in the drawings. (2.) In an automatic spring catch for sliding sashes of windows, louvres, &c., a bolt having a bevelled head provided with an anti-friction roller and rubber packing, a spiral spring around the shank of said bolt and an adjusting nut thereon, substantially as and for the purposes specified, and as illustrated.

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

No. 15840.—8th January, 1903.—THOMAS JOHNSON BRITTEN, residing on the property of the Wolhuter Goldmining Company, Limited, Witwatersrand Goldfields, Transvaal, Mine-manager. Improvements in apparatus for laying or settling the dust or pulverised rock created in the boring and blasting of holes in mining.

Claims.—(1.) Apparatus of the nature indicated, constructed, arranged, and operating for the purposes specified substantially as described, and illustrated in the drawings. (2.) An apparatus for laying or settling the dust or pulverised rock created in the boring and blasting of holes in mining, comprising, in combination, a water-container, a nozzle of the construction described formed with a water-supply branch placed in communication with the water-container and with an air supply branch placed in communication with a source of supply of air under pressure, constructed and operating substantially as described and shown. (3.) In apparatus of the nature specified, a nozzle comprising an air-supply branch and a water-supply branch, the air-supply branch constructed with an air-passage fitted with a valve for regulating the air-supply, and formed with a flat bottom and rounded top at the outlet orifice, and the water-supply branch constructed with a water-passage opening into the air-passage near the outlet orifice, inclined to the flat base of the air-passage, and elongated in the direction of said air-passage, substantially as described, and shown in Figs. 1 to 3 of the drawings. (4.) In apparatus of the nature indicated, and intended for use when blasting, the nozzle consisting of air- and water-supply branches, the air-branch being constructed with an air-passage formed flat at the bottom and rounded at the top, and splayed outwards, or constructed with divergent walls at the outlet orifice, and the water-branch with a water-passage communicating with the air-passage near the outlet orifice, inclined to the flat base of the air-passage, and elongated in the direction of said passage, substantially as described and shown with reference to Figs. 2 and 3 of the drawings. (5.) In apparatus such as specified, the combination with the rock-drill and the water-container of the nozzle, constructed substantially as described, connected with the rock-drilling machine in such a way that the apparatus is brought into operation when the air-admission or throttle valve is operated to supply air to the machine, and means for fixing the nozzle to the water-container at any required angle to direct the spray on to the rock face, substantially as described with reference to Fig. 4 or Figs. 6 and 7 of the drawings. (6.) An apparatus for use when blasting for the purposes specified, having its several parts constructed, arranged, and operating substantially as described, and illustrated in Figs. 1 to 3 and Fig. 5 of the drawings.

(Specification, 7s.; drawings, 1s.)

No. 15842.—6th January, 1903.—THE PERFECTION BLIND-AND LOCK-STITCH SEWING-MACHINE COMPANY, of care of Nevin John Loos, of 113, East State Street, Trenton, Mercer,

New Jersey, United States of America, Manufacturers (assignees of Charles Francis Filor, of care of Nevin John Loos aforesaid, Inventor). Blind-stitching sewing-machines.

Claims.—(1.) A blind-stitch sewing-machine characterized by a reciprocating presser-foot, a spring-pressed work-carrying lever fulcrumed upon the bed-plate under the presser-foot, and having a straight edge extending in both directions laterally beyond the presser-foot, about which edge the material to be worked upon may be folded and fed by the feed-dog from above the lever where the material is under and against the presser-foot, around the straight edge thereof and below the lever, and then between the lever and said dog, whereby the needle of the machine may penetrate the fold of the material at the straight edge and form stitching invisible from one side of the material. (2.) A blind-stitch sewing-machine characterized by a straight-edged work-carrying lever, about which the material is folded to form a fold at the straight edge, a notched plate adjustably mounted upon the lever, said notches being spaced for the various widths of stitches provided for by the different amplitudes of lateral vibrations of the needle of the machine, whereby blind-stitching of different lengths or depths may be produced. (3.) A blind-stitching sewing-machine characterized by a straight-edged work-carrying lever, about which the material is folded to form a fold at the straight edge, a notched plate adjustably mounted upon the lever, said notches being spaced for the various widths of stitches provided for by the different amplitudes of lateral vibrations of the needle of the machine, whereby blind-stitching of different lengths or depths may be produced, the said plate having also a single notch at one portion, and the needle being adapted to have no lateral vibration, whereby the stitching may be varied to produce the stitches all in substantially the same straight line, lying perpendicular to said straight edge during the operation of sewing. (4.) A blind-stitch sewing-machine characterized by a lever provided with various notched adjustable passages for the needle, the notches having index numbers, mechanism for varying the lateral vibrations of the needle from zero to a predetermined maximum, and index numbers arranged in conjunction with said mechanism to correspond with the aforementioned numbers, whereby the notches may be adjusted to suit the amplitude of the vibrations of the needle. (5.) A blind-stitch sewing-machine characterized by a work-carrying lever provided with notches arranged in pairs and a single notch, a needle and laterally vibratory needle-bar, and a pitman and regulator for determining the amplitude of the vibrations. (6.) A blind-stitch sewing-machine characterized by a work-carrying lever for holding the cloth folded from the top to under the same, a knee-operated mechanism arranged to engage the underside of said work-carrying lever to raise the same from the feed-dog of said machine, and a spring partially resisting the raising of the lever. (7.) A blind-stitch sewing-machine characterized by a fulcrumed spring-pressed work-carrying lever, a reciprocating needle-bar, a presser-foot bearing upon said lever, and means for communicating motion intermittently from the needle-bar to the presser-foot, whereby said lever may intermittently rise for permitting the easy feeding of the material by the feed-dog. (8.) A blind-stitch sewing-machine having a feed-dog, a spring-pressed fulcrumed work-carrying lever, a projection on the lever bearing against said feed-dog, the bed of the machine having a depression under said lever. (9.) A blind-stitch sewing-machine consisting of elements in combination substantially as shown and described, whereby the stitching or threads forming the stitches are invisible upon one side of the material sewed. (10.) A blind-stitch sewing-machine having a work-carrier over which the work is folded so that the needle may pass through the material and just escape the carrier, and means for varying the lateral throw of the needle whereby the character of the stitching may be varied.

(Specification, 9s. 6d.; drawings, 3s.)

No. 15843.—7th January, 1903.—JAMES SAMUEL BROWNELL, of 132, Market Street, San Francisco, California, United States of America, Merchant. Concentrator.

Claims.—(1.) In a vanner or concentrator, including an endless travelling belt and a worm gear, the members of which are movable one relative to the other and through which motion is transmitted, an eccentric from the strap of which the worm is suspended, and by the turning of which the worm and gear may be engaged or disengaged, and a swivelled journal-box suspended from said strap and in which the shaft of the worm is mounted. (2.) In a worm-gear driving-device for endless-belt concentrator, an eccentric turnable upon the gear-shaft, and a strap within which it is also turnable, a hanger dependent from the strap, a journal-box carried by said hanger, in which box the worm-shaft is turnable, and a means by which the eccentric may be turned to raise or lower the worm and engage or disengage it with the gear. (3.) A