May 16.] THE NEW ZEALAND GAZETTE. 1601

No. 22637.—4th April, 1907.—GEORGE JAMES COX, of Campbell Road, Balwyn, Melbourne, Victoria, Australia, Gas Engineer. Differential-pressure apparatus for indicating and recording velocities of aeriform fluids.

Claims.—(1.) The application of means for utilising the differential in pressure intensity as may be, upon different portions of a body of aeriform fluid, carried in a pipe reticulation as aforesaid, and as may be caused by skin or other frictional influences in passing such aeriform body through different portions of a pipe reticulation, or as may be jointly caused by such friction as aforesaid and by partially throttling the passage of a portion of the said fluid through the pipes for the purpose of accentuating the amount of such differential as may exist in the pressure, from causes as aforesaid, to be the means whereby apparatus as may be provided is actuated for the purpose of indicating and registering an approximate record of the maximum velocity at which the aforesaid body of aeriform fluid has passed through the aforesaid reticulation, as described and set forth. (2.) The use of apparatus for indicating or for indicating and recording the maximum velocity or of other velocities at which a body of aeriform fluid has passed or is passing through a pipe reticulation when such apparatus is primarily actuated for such indicating purposes by the means of differential in the intensity of the pressure existing upon the aforesaid aeriform fluid within different portions of the said pipe reticulation, and when such apparatus as aforesaid is constructed substantially in the manner as described, and as partially shown by Figs. 1 to 5 inclusive in the drawings.

(Specification, £1 1s.; drawing, 1s.)

No. 22656.—10th April, 1907.—WALTER GILLETT, of 1 Acacia Grove, West Dulwich, London, S.E., Builder, and MAX DAVID LEHMANN, of 23 Croxted Road, West Dulwich, London S.E., Merchant, both in England. Carburettor for internal-combustion engines.

Extract from Specification.—This invention relates to carburettors in which the liquid to be vaporised enters the mixture suction-pipe through a jet in communication with the float-chamber, and in which there is an additional passage from the space above the level of liquid in the float-chamber or equivalent chamber to the mixture suction-pipe. . . . One object of this invention is to so contrive and control this passage that variation in the suction of the engine may be accompanied by a different variation of jet feed pressure, whereby the proportion of the supply of vaporising-liquid is varied in accordance with the different requirements of the engine at different speeds. Another object of the invention is to provide the passage-way with a means for regulating it, operable by hand or by some mechanical part of the engine of which the speed varies with that of the engine itself, so as to produce a progressive and gradual variation of the passage-way. A further object of the invention is to adapt this passage-way to the suction-pipe of an engine which has a throttle, as found in most internal-combustion engines at present, so that said throttle regulates the passage-way.

[NOTE.—The above extracts from the specification are inserted in place of the claims.]

(Specification, 4s. 6d.; drawing, 1s.)

No. 22657.—10th April, 1907.—HORACE MORE, of Western Road, Balmain, Sydney, New South Wales, Australia, Engineer. An improved extension-ladder.

Claims.—(1.) In extension-ladders, a front and a back section of identical contour and size, the back section being adapted to slide freely over the rear of the front section, a clip secured to the front section through which the rear section will slide, and a clip secured to the back section which will slide over the front section as specified. (2.) In extension-ladders, in combination, a front and a back section of identical contour and size, the back section being adapted to slide freely over the rear of the front section, the front edges of each section being moulded into semicircular form and the rear edges of each section being lined with approximately semicircular channelled steel liner, and top and bottom clips, as and for the several purposes set forth. (3.) In extension-ladders, a stiffening and strengthening brace consisting of an approximately semicircular liner channelled at the bottom (as shown at Fig. 4), such liner being countersunk into the rear side of each section of the ladder, and the channel being adapted to receive the heads of the nails whereby the liner and the rungs of the ladder are secured in their respective positions, as set forth. (4.) In extension-ladders, a pivoted pawl such as H having a long and short finger with a recess between the fingers, such tumblers being balanced and adapted to be operated by the rungs of the movable section of the extension-ladder and automatically lock such section in any desired position, as specified. (5.) In extension-ladders, in combination, a front and a back section, the back section being adapted to slide over the rear of the front section, means for raising the back section (such as the rope and pulleys shown in Fig. 1), and means, such as the balanced tumbler and pawl H, for locking the back section in any desired position, as set forth and specified. (6.) The general arrangement, construction, and combination of parts in the improved extension-ladder as illustrated in the drawings, as set forth, and for the several purposes specified.

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

No. 22667.—10th April, 1907.—ALWIN FISCHER, of O’Connell Street, North Adelaide, South Australia, Plumber. One-flame cooking and baking apparatus.

Claims.—(1.) In water-vessels for cooking or steaming, an extension-tube with a screw-cap in the outer end, which extension-tube projects into the flame of a gas-stove or oil-stove and allows the contents of the water-vessel to be heated without such water-vessel being placed over the flame. (2.) An oven for baking and roasting, together with one or more water-vessels, having an extension passing into the flame under the oven, and also one or more of such water-vessels being surmounted by other vessels with perforated bottoms or with tubes for the passage of steam, all for the purpose of roasting, baking, boiling, and steaming different kinds of food at the same time, and with one single flame, all substantially as described and shown, as a combination of parts.

(Specification, 2s. 6d.; drawing, 1s.)

No. 22678.—12th April, 1907.—THOMAS PAGE, of Austin Street, Wellington, New Zealand, Mercer. Improved apparatus for the manufacture of carburetted air, for lighting, power, and heating purposes.

Claims.—(1.) In apparatus for carburetting air, method for taking hydro-carbon liquid from the tins or vessels in which it is usually sold and lifting it from the feed-tank and delivering it in required quantities into the carburetter, proportioned to the consumption of carburetted air which passes through the carburetter, by means of mechanical gearing connecting the liquid-lifting device and the air-forcing apparatus, a constant supply being rendered automatic by the mechanical gearing. (2.) In apparatus for carburetting air as described in claim 1, a rotating wheel with cups placed at intervals for lifting the liquid from the feed-tank to a hopper-shaped receiver, from which the liquid then descends by gravitation through a pipe into the carburetter. (3.) In apparatus for carburetting air as described in claim 1, device for rendering the supply of hydro-carbon liquid proportional to supply of air, comprising lifting-contrivance as described in claim 2. (4.) In apparatus for carburetting air as described in claim 1, device for supplying liquid hydro-carbon proportional to the supply of air, comprising lifting-contrivance as described in claim 2, a rotating fan-wheel partially submerged in a drum of water, and gearing by cogs and chain-wheels connecting the rotating lifting-wheel in the hydro-carbon-supply vessel, and giving a constant motion to air-force apparatus. (5.) In apparatus for carburetting air as described in claim 1, regulating the rate of production to that of consumption of carburetted air by means of a rotating fan-wheel partially submerged in water moved by the external driving-power, whereby air is automatically drawn by means of suction through an air-valve into the chamber containing the fan-wheel, which air is forced through the air-supply pipes by the motion of the fan-wheel into the carburetter, where it meets the regulated proportion of volatile liquid, which is carburetted and passes into the gasholder. (6.) In the apparatus for carburetting air, the carburetter which is entirely submerged in water which the volatile liquid descends by gravitation, where it is vaporised by the addition of air driven into the carburetter by means of the fan-wheel air-force contrivance, geared to which is a fan-wheel which it rotates automatically in the water surrounding the carburetter contained in the generator, keeping the water at a temperature below that of the prevailing atmosphere, preventing the condensation of the carburetted air in the service-pipes. (7.) In the apparatus for carburetting air substantially described, to act as a reservoir to contain the gasholder, dispensing with the necessity for a separate reservoir. (8.) In apparatus for carburetting air, means which is substantially described whereby any gas or odour from the volatile liquid that may be spilled near the apparatus is absorbed and carried away to the open atmosphere.

(Specification, 5s. 3d.; drawing, 2s.)

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