820
THE NEW ZEALAND GAZETTE.
[No. 17

heating bodies are arranged and protected as much as possible from direct contact with the carbide mass. (4.) In the device according to claim 3, the formation of the chambers or spaces with the help of casings of sufficiently heat-conducting materials, which may possibly be capable of being destroyed at the temperature which arises. (5.) In the device according to claim 3, the arrangement of a porous layer around the carbide, of material which does not combine with nitrogen at the temperatures which come into consideration, for the purpose of a uniform better distribution of the nitrogen and for protecting the outside wall of the reaction receptacle.

(Specification, 6s.)

No. 23863.—24th December, 1907.—GEORGE MCNAB, of Wellington, New Zealand, Seaman. An appliance for use in tilting beer and other casks in order to allow of their contents being completely drawn off.

Claims.—(1.) An appliance for the purpose indicated, consisting of a rod or bar mounted vertically in a guide or stand and capable of longitudinal movement therein, a spring normally keeping such rod or bar at the upward limit of its movement, and means for depressing the bar against the action of the spring and then releasing it, substantially as specified. (2.) An appliance for the purpose indicated, consisting of a rod or bar mounted vertically within a guide or stand and projecting above the top thereof, a cross-piece pivoted upon the top end of the rod or bar, a plate secured upon such rod or bar and fitting loosely within the guide or stand, a spring in compression placed between such plate and the bottom of the guide or stand, and means for depressing the rod or bar against the action of such spring and for releasing it, substantially as specified. (3.) An appliance for use in tilting beer and other casks in order to allow of their contents being completely drawn off, substantially as described and explained, and as illustrated in Figs. 1 and 2 of the drawings. (4.) An appliance for use in tilting beer and other casks in order to allow of their contents being completely drawn off, substantially as described and explained, and as illustrated in Figs. 3 and 4 of the drawings.

(Specification, 5s. 6d.; drawing, 1s.)

No. 23880.—3rd January, 1908.—WALTER CLAUDE JOHNSON, of Broadstone Farm, Colemans Hatch, Sussex, England, Engineer. Improved water-distributor.

Claims.—(1.) A water-distributor in which the angle of elevation of the nozzle is automatically caused to undergo a gradual variation whilst the plane of elevation of the nozzle rotates. (2.) A water-distributor according to claim 1 in which as the radius of distribution increases the rate of decrease in the angle of elevation diminishes, and vice versa. (3.) A water-distributor according to claim 1 in which, in addition to the gradual alteration of the angle of elevation, the nozzle is periodically tilted during a revolution. (4.) A water-distributor according to claim 1 in which the rotation and alteration of elevation of the nozzle is effected by a vaned wheel driven by the stream of water to be distributed through a pair of unequally toothed spur-wheels. (5.) A water-distributor according to claim 4 in which one of the spur-wheels is connected to the nozzle and the other is formed with a race on which a roller connected with the nozzle bears. (6.) A water-distributor according to claims 2 and 5 in which the race for the roller is so shaped that with increasing radius of distribution the rate of decrease in the angle of elevation diminishes, and vice versa. (7.) A water-distributor according to claims 3 and 5 in which the race spur-wheel is adapted to be raised and lowered by a fixed cam-plate.

(Specification, 5s. 9d.; drawing, 2s.)

No. 23882.—3rd January, 1908.—WILLIAM SPEIRS SIMPSON, Civil Engineer, of 49 Battersea Park Road, London, England. Improvements in connection with the uniting or welding of metals.

Extract from Specification.—I bring into contact, partially or wholly, the surfaces of the requisite pieces of harder and softer metal which are to be united, joined, or welded together. For instance, a sheet or plate of steel is brought into contact with a corresponding sheet or plate of aluminium, copper, brass, or other metal of any required thickness with which it is intended to cover the former (upon one or both sides), and the same are clamped together in the desired position, or in some cases two or more plates of steel having a sheet or plate of copper, aluminium, brass, or other metal interposed between each two of the same are assembled in the desired relative positions and firmly clamped or otherwise held together, then the articles so clamped together are encased, covered, or enveloped on all sides (inside and out if hollow or tubular) with a paste composed of ground coke, charcoal, or other form of carbon, as pure as reasonably possible, mixed with water and a binding material, such as treacle, sugar, starch, flour, or other similar substance, preferably such as may be soluble in water, and having the properties of binding with water, and, when calcined, of forming a reasonably pure coherent coke. This carbonaceous covering or envelope may either be formed into a mould to fit the mass of metal assembled for welding, which after being suitably dried may be used to envelop the latter whilst being heated, or the metals to be welded may be placed in a suitable receptacle such as a fire-resisting crucible or a metallic vessel, with or without a cover, and the carbonaceous paste may be tightly packed around the same on all sides; after which the entire mass of metals, together with its carbonaceous covering or packing and the receptacle, are subjected to sufficient heat, either (a) in a muffle or other furnace, or (b) in a bath of molten metal, such as pig-iron, to fuse or melt the softer but not the harder metal. Under the said conditions, and when subjected to temperatures sufficient to melt the softer metal, the carbonaceous casing or envelope prepared and employed in connection with such softer metal as aforesaid provides a reducing agent or atmosphere which effectively deoxidizes the surface of the harder metal (which requires no other preparatory pickling or cleaning) and also prevents the oxidation of the softer metal whilst molten, so that in a brief space of time after fusing the latter becomes firmly and inseparably joined, united, or welded to and with the harder metal at every point of contact. In all cases there is a molecular impenetration of a portion of the softer metal into the harder metal in contact therewith. The carbonaceous paste prepared as aforesaid also forms an efficient mould to retain in the desired position and prevent the escape of the softer metal whilst molten. In some cases, especially if the softer metal being employed is copper, it is desirable to add to the carbonaceous paste a small quantity of zinc or zinc filings, the presence of which is advantageous for the prevention of blowholes in the copper surfaces whilst cooling; but it is not necessary to the process, nor is it used if the softer metal contains zinc as an alloy.

[NOTE.—The above extract from the specification is inserted in place of the claims.]

(Specification, 12s. 6d.)

No. 23887.—3rd January, 1908.—JOHN LESLIE CLOUDSLEY, Junior, of Brightlands, Reigate Surrey, England, Engineer. Improvements relating to gas-meters and the like.

Claims.—(1.) A wet gas-meter having a siphon seal arranged to withdraw water automatically from an overflow chamber to render practically the whole capacity of the chamber always available for surplus water, and to form an efficient seal, substantially as described. (2.) A wet gas-meter having means for withdrawing water from an overflow chamber automatically, and without any movement of valves or the like, and arranged to render practically the full capacity of the chamber always available for surplus water, substantially as described. (3.) A wet gas-meter having an overflow chamber adapted directly to receive surplus water, a siphon therein composed of an outer tube with a notched base and an inner tube passing outside the meter-case, and provided with a squared end, substantially as described. (4.) The improved wet gas-meter described, and illustrated in the drawings.

(Specification, 4s. 3d.; drawing, 1s.)

No. 23888.—3rd January, 1908.—THE HONOURABLE CHARLES ALGERNON PARSONS, C.B., of Heaton Works, Newcastle-on-Tyne, Northumberland, England, Engineer. Improvements in machines for shaping turbine blades.

Claims.—(1.) A machine for tipping blades, comprising a fixed blade-carrier, means for clamping blade-metal thereon, and a cutter mounted so that it may be traversed over the blade-metal to reduce its cross section at the tip of a blade, with or without a former and former-dise, substantially as and for the purpose described. (2.) A machine according to claim 1, having a revolving cutter the spindle of which is mounted in a bearing-block pivotally carried by levers placed on each side of the carrier, said levers upon one side engaging