JUNE 11.] THE NEW ZEALAND GAZETTE. 1669

No. 24322.—30th April, 1908.—ALEXANDER WALKER, of Mount Gambier, South Australia, Accountant. Improvements (for educational purposes) in pencil-cases and other cylinders.

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Claims.—(1.) A device, comprising a cylindrical hollow casing, interrelated information such as factors and their products exhibited in horizontal lines outside thereof, removable protective bands standing higher than the surfaces having the information, and (enclosing the bands) a rotatable, slidable outer sleeve having holes all located in a horizontal line. (2.) In combination, a cylindrical hollow casing as described, a transversely ridged information-sheet affixed round it, and a movable sleeve (having only three holes) outside the ridged sheet. (3.) In a pencil-case, a longitudinal recess to receive and hold ends of one or more information-sheets of the character indicated. (4.) A hollow cylinder, having information of the indicated kind printed upon it, protective ridges or transverse members integral with it, and a sleeve having only three perforations (all in one line) adapted to be moved over the ridges. (5.) In a device of the class specified, a hollow cylinder, a plurality of separate information-sheets assembled on the cylinder, ridges integral with the cylinder between the said sheets and of greater elevation, substantially as described.

(Specification, 8s.; drawing, 1s.)

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No. 24323.—30th April, 1908.—SAMUEL RICHARD HAWKE, of Stephen Terrace, Walkerville, South Australia, Engineer. An improved method or process for coating ships’ bottoms with copper to prevent fouling and marine growth.

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Claims.—(1.) An improved method of coating ships’ bottoms with copper to prevent fouling and marine growth, consisting in applying an imbedding composition, such as tar, pitch, bitumen, or asphaltum, to the bottom of the vessel, and subsequently imbedding a sufficiency of granulated copper or copper-alloy in or upon the imbedding composition to form a metallic surface, which surface is then rendered compact and even by the application of pressure thereto, substantially as described. (2.) An improved method of coating ships’ bottoms with copper to prevent fouling and marine growth, consisting in applying to the ship’s bottom a coating of an insulating material, or a paint produced from a metal which is an electro-negative to the iron or steel, such as metallic zinc paint, and when dry superimposing a layer of an imbedding composition, such as tar, pitch, bitumen, or asphaltum, thereon, and subsequently imbedding a sufficiency of granulated copper or copper-alloy in or upon the imbedding composition to form a metallic surface, which surface is then rendered compact and even by the application of pressure thereto, substantially as described.

(Specification, 4s.)

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No. 24334.—28th April, 1908.—WILLIAM EDWARD GARFORTH, of Snydale Hall, Normanton, Yorkshire, England, M.Inst.C.E., Colliery-owner. Improvements in respiration apparatus for use in coal-mines and other places.

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Claims.—(1.) In respiration apparatus for the use of persons entering places filled with or containing irrespirable gases, connecting the oxygen-storage cylinder or cylinders directly with the face-piece by means of a supply-pipe, and interposing in that supply-pipe a valve provided with means by which the quantity of oxygen allowed to pass varies according to the variations of pressure in the face-piece, and constructing the face-piece of such limited capacity that the said valve is enabled to be lung-governed, so that the volume of oxygen caused to pass into the face-piece is controlled by the action of the wearer’s lungs. (2.) In respiration apparatus substantially as claimed by claim 1, constructing the face-piece so that the face of the wearer closes and communicates with a chamber of small capacity having an outlet-valve by which the expired gases pass to the regenerator, an inlet-valve by which the purified nitrogen can be drawn into the chamber from the storage reservoir by the inspiration of the user, in combination with a supply-pipe directly entering and freely communicating with the said chamber of small capacity in the face-piece, said supply-pipe forming connection with a valve-chamber containing a reducing-valve

governing the supply from the oxygen-storage cylinder or cylinders, said valve being so constructed and balanced as to be controlled by the action of the wearer’s lungs. (3.) In respiration apparatus substantially as claimed by claims 1 and 2, providing a lung-governed valve of that type having a flexible extensible case or tube, a valve-governed inlet from the oxygen-cylinders to the interior thereof, a tubular connection from said case or tube to the oxygen-supply pipe extending to the face-piece, said extensible case being balanced between two springs, and constructing said valve with one of said springs contained within said case, and the other acting exteriorly of same and in an opposite direction, and being adjustable in tension, said extensible case actuating eccentrics by jointed arms for regulating the position of the valve, substantially as described. (4.) In respiration apparatus substantially as claimed by claims 1, 2, and 3, providing the lung-governed valve with a spring acting below the valve proper in a direction to raise the same from its seat and to hold said valve against the eccentrics, substantially as described. (5.) The particular construction of lung-governed valve apparatus substantially as described with reference to Figs. 8 to 13 of the drawings. (6.) In respiration apparatus substantially as claimed by claims 1, 2, and 3, the construction and arrangement of the face-piece with a partition having an aperture containing an outlet-valve communicating with an outer chamber from which the expired breath passes to the regenerator, and with an aperture containing an inlet-valve to said chamber, through which inlet-valve nitrogen passes from the reservoir, and with an oxygen-supply pipe entering and opening freely into the chamber of small capacity, with which the mouth of the wearer communicates, substantially as described with special reference to Figs. 4 to 7 of the drawings.

(Specification, 14s.; drawing, 6s.)

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No. 24335.—28th April, 1908.—WILLIAM EDWARD GARFORTH, of Snydale Hall, Normanton, Yorkshire, England, M.Inst.C.E., Colliery-owner. Improvements in head-gear for respiration apparatus for use in coal-mines and other places.

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Claims.—(1.) A head-gear for respiration apparatus, of that type having a face-piece covering in an airtight manner the mouth and nose of the wearer, and having means for conducting away the expired air and introducing fresh air, characterized by the fact that tubes 2 communicating with the interior of the face-piece 1 are permanently fixed to the upper central part of said face-piece, and are curved over the top of the wearer’s head to the back of the neck, and are there connected to flexible pipes 4, 5, leading respectively to the regenerator and to the fresh-air-supply apparatus, and that said curved tubes 2 rest upon the exterior of a flexible head-cap 3 fitting the head of the wearer, so that the face-piece 1 is supported by said curved tubes 2, the latter passing through loops 38 on the exterior of the head-cap 3, so that the tubes 2 can be slidden therein to adjust the face-piece to fit the person using the apparatus. (2.) A form of construction of the head-gear and face-piece according to claim 1, characterized by the fact that the tubes carrying the face-piece 1 and curving over the top of the wearer’s head are formed by a single tubular structure 2 divided interiorly into two passages, one for conveying expired products from the face-piece 1 and the other for conveying regenerated products to the face-piece, and that this tubular structure 2 is permanently joined to the top of the face-piece so that it passes therefrom centrally between the eyes of the wearer. (3.) A form of construction of the head-gear and face-piece according to claims 1 and 2, characterized by the fact that the face-piece 1 is constructed with partitions to divide the interior into a chamber 41 with which the nose and mouth of the user communicate in an airtight manner, while a valved inlet aperture in the partition communicates with an exterior chamber 43 communicating with one of the passages in the tubular structure 2 forming the crest, and another valved aperture with a second outer chamber 42, the latter communicating with the other passage in the tubular structure 2, the face-piece 1 being held in sufficient pressure-contact with the face by straps 53 passing round the head of the wearer. (4.) In head-gear for respiration apparatus substantially as claimed by claims 1, 2, and 3, forming the face-piece with a chamber of small capacity having an outlet-valve by which the expired gases pass to the regenerator, an inlet-valve by which the purified nitrogen can be drawn into said chamber from the storage-reservoir, and a pipe entering said small-capacity chamber of the face-piece in connection with a lung-governed suction-operated