JUNE 12. THE NEW ZEALAND GAZETTE. 1279

said perforated rim, a disc exteriorly closing in said stationary band, an opening in said stationary band, and a tube leading from said opening to the soil, substantially as and for the purposes set forth. (2.) The improvements in a turnip and other small-seed sower for attachment to agricultural and other machines, consisting of, in combination, a receptacle containing seed, a vertical plate closing same, a feed-duct in said vertical plate, a tapered extension or rim to said vertical plate, a plurality of rings of perforations through said rim, an incomplete circular spring band laterally slidable within said rim, the whole mounted on and rotatable by a shaft, a stationary band fitting partially round said perforated rim, a disc exteriorly closing in said stationary band, an opening in said stationary band, and a tube leading from said opening to the ground, substantially as and for the purposes set forth. (3.) The general construction, arrangement, and combination of parts composing my improved turnip and other small-seed sower for attachment to agricultural and other machines, all substantially as and for the purposes described with reference to the drawings.
(Specification, 4s.; drawings, 1s.)

No. 14618.—13th March, 1902.—MURRAY CORRINGTON, of 40, Wall Street, New York, United States of America, Attorney-at-Law, and FRANK LEMONT DODGSON, of Rochester, New York, United States of America, Engineer. Improvements in pneumatic railway signalling.

Claims.—(1.) A distributing-valve, a single source of fluid-pressure supply, which is to be distributed by the valve according to its position, a cylinder and piston for operating said distributing-valve, an operating-pipe for said valve, and means for connecting one side of said cylinder to the atmosphere when pressure is increased in the operating-pipe, and means for connecting the opposite side of the cylinder to the atmosphere when pressure is reduced in the operating-pipe, substantially as described. (2.) In a fluid-pressure distributing-valve, a single source of fluid-pressure supply which is to be distributed by said valve, a cylinder and piston acting upon said valve, a controlling or operating pipe for the valve, two diaphragms, and valves attached to said diaphragms, controlling the admission of air to and from the two ends of the cylinder, substantially as described. (3.) The combination with a motor-mechanism of a distributing-valve, a single source of fluid-pressure supply which is to be distributed by said valve to the motor-mechanism according to its position, a cylinder and piston for operating said distributing-valve, a single operating-pipe for said valve, means for causing increase of pressure above the normal in said pipe to operate the valve in one direction, means for causing decrease of pressure below the normal in said pipe to operate the valve in the other direction, and means for equalising the pressure to the normal after each operation, said latter means being inoperative until after the valve has completed its movement, substantially as described. (4.) In a fluid-pressure switch or signal mechanism, a manually operated lever in the tower, an indicator-cylinder to act upon the lever, a stop-roller carried by the piston of said indicator-cylinder, said lever having a slot in which the roller is guided, said slot having two parallel portions offset from each other and at right angles to the axis of the indicator-cylinder, thus forming two shoulders, against one of which the roller abuts when the piston in the cylinder is in one extreme position, and against the other one of which shoulders the roller abuts when the piston is in another position, substantially as described.
(Specification, 17s. 6d.; drawings, 6s.)

No. 14683.—25th March, 1902.—JAMES MURISON, of Dunedin, New Zealand, Engineer. Improved sleeve for employment on lower tumbler-shaft of a bucket dredge, and means for securing same to the tumbler and tumbler-shaft.*
[NOTE.—The title in this case has been altered. See List Provisional Specifications, Gazette No. 30, of the 17th April, 1902.]

Claims.—(1.) A sleeve or bush for employment upon the lower tumbler-shaft of a dredge, having projecting lugs adapted to take into corresponding recesses formed in the side of the tumbler, substantially as and for the purpose specified and illustrated. (2.) A sleeve or bush for employment upon the lower tumbler-shaft of a dredge, having lugs projecting from a flange at one end and a collar formed integral with its outer end, said collar having holes to receive a bolt securing the sleeve to the tumbler-shaft, substantially as specified and illustrated. (3.) The improved sleeve for employment upon the lower tumbler-shaft of a bucket dredge, and means for securing same to the tumbler and tumbler-shaft, substantially as specified and illustrated.
(Specification, 1s. 9d.; drawings, 1s.)

No. 14693.—3rd April, 1902.—THOMAS DOUGLAS KYLE, of Pile Street, Dulwich Hill, Sydney, New South Wales, Engineer. Improvements in the combustion of fuel in boiler and other furnaces, and in apparatus therefor.

Claims.—(1.) In boiler or other furnaces, the method of improving the combustion of fuel by returning hot gases mingled with superheated steam from the back of the fire-bridge to the furnace, substantially as specified. (2.) In boiler or other furnaces, means for returning hot gases intermingled with superheated steam from the back of the fire-bridge to the furnace in the direction of the fire-door, substantially as and for the purpose set forth. (3.) In boiler or other furnaces, in combination, means for returning hot gases mingled with superheated steam from the back of the fire-bridge to the furnace towards the fire-door, means for superheating steam, and means for preventing the burning of the pipe connections and coil, substantially as set forth.
(Specification, 4s.; drawings, 1s.)

No. 14761.—17th April, 1902.—WILLIAM HENRY GORDON, of 69, Lyons Street South, Ballarat, Victoria, Engineer and Blacksmith. An improved hub or boss for fastening to a shaft any part of a machine that causes or is caused by the shaft to revolve.

Claims.—(1.) With hubs or bosses, a more efficient hub or boss for fastening to a shaft any part of a machine that causes or is caused by the shaft to revolve as described, substantially in the manner set forth. (2.) With hubs or bosses, a hub or boss that can more easily be fixed or adjusted to a shaft that causes or is caused by the shaft to revolve as described, substantially in the manner set forth. (3.) With hubs or bosses, a hub or boss that requires that no keyway need be cut into the shaft to which it is to be attached, but that will grip firmly and securely the plain, smooth shaft which causes or is caused by any part of a machine to revolve as described, substantially in the manner set forth. (4.) With hubs or bosses, a hub or boss that distributes the strain over a much greater surface of the shaft to which it is to be attached, and which it causes or is caused by to revolve as described, substantially in the manner set forth. (5.) With hubs or bosses, a hub or boss that will hold as firmly, and also in as true a bed, as a shrunken-on hub or boss of any part of a machine that causes or is caused by the shaft to which it is attached to revolve as described, substantially in the manner set forth.
(Specification, 1s. 3d.; drawings, 1s.)

No. 14881.—13th May, 1902.—THOMAS SCOTT MULLAY, of Invercargill, New Zealand, Sawmiller, and WILLIAM SIEVWRIGHT, of Gisborne, New Zealand, Solicitor. An improved preserving and antifouling composition or coating particularly applicable to the bottoms of ships and to wharf-piles.

Description of Invention.—The essential ingredient in the composition is tannin or tannic acid, found in the bark of all trees and in many plants in any locality in the world, all of which contain it in greater or less proportion; or the tannic extract of such barks obtained by soaking or decoction in any suitable liquid. The extract may be applied, of any desired strength, to the surface to be protected or preserved, either by itself or mixed with a pigment; but the preferable and simplest method is to reduce the bark to a powder or very finely pulverized or ground state and to mix it, in any proportions, with ordinary paint or pigment to give it consistency, and then paint it with an ordinary paint-brush on the bottoms of ships or vessels, or on the surface to be protected from marine insects or fouling. The composition may also be made up in an effective form by mixing the powdered or ground bark with rosin, oil, and plaster-of-paris, in such proportions as suits the particular surface to be protected. The extract, or the bark in the ground form, mixed with pulp, and manufactured into a kind of felt, and attached to the bottoms of ships or vessels, or covering any timber, will protect the same from the attacks of marine parasites and from fouling. The powdered bark, or the extract, is an effective insecticide for blight or destructive insect pests on fruit and other trees and plants, or on wooden structures and buildings, and may be applied by dusting or (in a liquid state) by brush or spray. It will, so applied, prevent the ravages of ants.
Claim.—That the powdered bark, or extract, obtained and applied in the manner specified, is a novelty, and is effective for the purposes specified.
(Specification, 1s.)

No. 14905.—23rd May, 1902.—The Honourable CHARLES ALGERNON PARSONS, of Heaton Works, Newcastle-on-Tyne, Northumberland, England, Engineer. Improvements in and relating to steam-turbine blades.

Claims.—(1.) In steam-turbines, rings of blades formed by the staying-up of the blade-tops into heads which, in conjunction, produce the effect of a continuous shrouding adapted to prevent steam-leakage, substantially as described.