SEPT. 13.] THE NEW ZEALAND GAZETTE. 1727

No. 12777.—7th July, 1900.—JESSIE MILLER, wife of James Miller, Mining-manager, of Arrow Falls, Arrowtown, New Zealand. A self-feeding stoker for steam-boilers.

Description.—Consists of a crusher, an elevator, a tube provided with a feeder and extending through the boiler to furnace, a pyramid grating beneath the tube composed of pipes connected to the boiler, &c.

Claim.—The combination and adaptation of the various appliances marked A to H, arranged and operating substantially as described and illustrated.
(Specification, 1s. 3d.; drawings, 5s. 6d.)

No. 12784.—9th July, 1900.—FRANCIS HUGH TUCKER, of Yarrow Street, Invercargill, New Zealand, Clerk. Improvements in brushes for wetting the surfaces of paper and the like.*

Claims.—(1.) In a brush for wetting the surfaces of paper, &c., the combination of the hollow, compressible body of the brush such as A with the felt (or other materials) forming the brush, as B, and the air-tight stopper such as C, substantially as described and as explained, and as illustrated in the drawing. (2.) In a brush for colouring surfaces or for writing, the combination of the hollow, compressible body of the brush such as A with the felt (or other materials) forming the brush, such as B, and the air-tight stopper such as C, substantially as described and as explained, and as illustrated in the drawing.
(Specification, 2s.; drawings, 3s.)

No. 12860.—8th August, 1900.—GEORGE JAMES ADDISON RICHARDSON, of Invercargill, New Zealand, Mechanical Engineer. Improvements in spherical casters.

Claim.—In connection with spherical casters, the collar made with a groove or ball-path, and fitted with ball bearings, substantially as and for the purposes set forth.
(Specification, 1s. 6d.; drawings, 3s.)

No. 12918.—27th August, 1900.—LEON SAUBAIN DE CLEENE, of Boundary Road, Palmerston North, New Zealand, Carpenter. An improved flooring-cramp.

Claims.—(1.) In flooring-cramps, the grip D with fulcrum at F, as shown in drawing. (2.) The combination of lever and strut in connection with the grip D.
(Specification, 1s. 3d.; drawings, 3s.)

No. 12921.—24th August, 1900.—GEORGE ARMIT WATSON, of Tay Street, Invercargill, New Zealand, Tinsmith. Improvements in tin-openers.

Claims.—(1.) The novelty and use of the combination and arrangement of parts constituting my improvements in tin-openers, for the purposes described and explained, and as illustrated in the drawings. (2.) In the novelty and use of the grooved or flanged blade A, in combination with the parts A¹, B, B¹, C, D, E, of the invention, substantially for the purposes described and explained, and as illustrated in the drawings.
(Specification, 1s. 6d.; drawings, 3s.)

No. 12922.—29th August, 1900.—WILLIAM LAWRENCE VOELKER, of 42, Bernard Street, Russell Square, London, England, Electrician. Improvements in the manufacture of filaments for incandescing electric lamps.

Claims.—(1.) The described method of producing carbide filaments for electric incandescing lamps, consisting in soaking a long fibre, cotton-thread, or cellulose filament in a solution of a readily decomposable salt or salts of the metal or metals intended to form the metallic base of the carbide, drying and spooling the same, packing the spool with powdered carbon and carbide of the kind required in a sealed crucible, and subjecting the same to a temperature adapted to convert the salt or salts into oxide or oxides, passing the filament thus carbonised through an electric arc whilst surrounded by a cylinder or like envelope composed of the aforesaid metallic base, and enclosed within a vessel charged with hydrogen or like gas, or with vapour of the metal or metals constituting the aforesaid metallic base, substantially as set forth. (2.) The modified method of producing carbide filaments for electric incandescing lamps consisting in passing a carbon filament through an electric arc, the atmosphere being displaced by hydrogen or like gas, or by vapour of the metal or metals intended to form the metallic base of the carbide, and passing the filament, thus converted into graphite, through an electric arc whilst surrounded by a cylinder or like envelope composed of the aforesaid metallic base, and

enclosed within a vessel charged with vapour of the metal or metals constituting the metallic base of the carbide to be produced, substantially as set forth. (3.) The further modification whereby a carbon filament is treated in the electric arc in the presence of vapour of the metal or metals constituting the metallic base of the carbide to be produced, the said carbon filament being converted into graphite and then into carbide at a single operation, substantially as set forth. (4.) In the manufacture of carbide filaments for incandescing electric lamps, the employment of apparatus constructed substantially as described, and comprising a pair of longitudinally perforated carbon electrodes, a cylinder composed of the metal or metals forming the metallic base of the carbide, and arranged about the opposed extremities of the electrodes, an enclosing vessel, and means for drawing the filament through the arc. (5.) In the manufacture of carbide filaments for incandescing electric lamps, the employment of a crucible formed with a hollow core about which the bobbin under treatment is arranged, and through which the heating gases are free to pass, substantially as described. (6.) For use in an electric lamp, a conductor for illuminating by incandescence, composed essentially of uranium-carbide or of titanium-carbide, and prepared substantially as described. (7.) For use in an electric lamp, a conductor for illuminating by incandescence, composed substantially of zirconium-carbide or of beryllium-carbide.
(Specification, 5s. 6d.; drawings, 8s.)

No. 12924.—29th August, 1900.—HARRY SHAW, of the Torpedo Corps, Wellington, New Zealand, Engineer, and JOHN JARDINE EWING, of Wellington aforesaid, Sawmiller. Improvements in apparatus for opening, closing, and fastening window-sashes.

Claims.—(1.) In apparatus such as described, screws engaging in nuts fixed to the sides of the sashes, substantially as set forth. (2.) In apparatus such as described, screws engaging in nuts fixed to the sides of the sashes, and means for rotating the said screws, substantially as set forth. (3.) In apparatus such as described, screws engaging in nuts fixed to the sides of the sashes, bevel-tooth wheels, and a handle for operating the said screws, substantially as set forth. (4.) In combination with a window-frame provided with side chambers and sashes, screws pivoted in brackets and engaging in nuts fixed to the sides of the sashes, means for rotating the said screws, and friction-rollers to prevent the sashes jamming when being raised or lowered by the screws, substantially as set forth. (5.) The improvements in windows consisting of parts constructed, arranged, and operating substantially as set forth.
(Specification, 2s. 3d.; drawings, 5s. 6d.)

No. 12926.—29th August, 1900.—THE BRITISH WESTINGHOUSE ELECTRIC AND MANUFACTURING COMPANY, LIMITED, of Westinghouse Building, Norfolk Street, Westminster, England, Manufacturers (assignees of Ralph Davenport Mershon, of 120, Broadway, New York, United States of America, Electric Engineer). Improved method of and means for indicating speed or current-frequency of electric generators.

Claims.—(1.) The method of determining the speed of a dynamo-electric machine or the frequency of its generated current which consists in causing a current to flow, either directly or indirectly, from the said machine in a local circuit in which an ohmic and an inductive resistance are included in series, and measuring the potential difference at the terminals of the inductive resistance. (2.) In an electrical installation, a local circuit supplied with alternating currents, either directly or indirectly, by the main generator, and containing an inductive resistance and an ohmic resistance joined in series, the latter being so large as to substantially control the current flowing in the local circuit, and an indicating-instrument connected in shunt to all or a portion of the inductive resistance, for the purpose specified. (3.) The modification in which, for the purpose of measuring the speed of any rotary machine, the local circuit is joined to the terminals of an alternating-current generator belted to the said machine, substantially as described. (4.) The arrangements for determining the speed of a dynamo-electric machine, or the frequency of its generated current, substantially described with reference to the drawings.
(Specification, 7s.; drawings, 3s.)

No. 12927.—29th August, 1900.—FREDERIC LIONEL GRAHAM, of Nareen, Victoria, Grazier. Improvements in penholders (nib-ejecting).

Claims.—(1.) In a nib-ejecting penholder, the combination with the hollow casing having near the nib end an enlargement of its bore, and having a double abutment spring ring sprung thereinto, and a slit in its other end, of a spring retracted plunger having integrally, in the order stated, the