Jan. 25.] THE NEW ZEALAND GAZETTE. 361

pointer serves to switch on a high-tension current, to switch on a low-tension current, to select the point of contact on the thermometer, and to simultaneously switch such currents off, substantially as and for the purpose set forth. (2.) In an electric automatic heat-controlling device of the kind referred to, the combination with an electro-thermostatic device of a subsidiary heating-circuit, substantially as and for the purpose set forth. (3.) In means for automatically controlling heat in electric-heating apparatus of the kind referred to, a switch-device adapted to cut off the main portion of the heating-current whilst at the same time allowing a small portion of the current to flow through a subsidiary coil of the heater, substantially as and for the purpose set forth.
(Specification, 8s. 6d.)
[NOTE.—Here follow four other claims.]

No. 30533.—22nd November, 1911.—SIDNEY WILLIAMS, of 320 Market Street, San Francisco, California, United States of America, Miner. Process of separating precious metals from their ores.
Claim.—(1.) The process of separating precious metals from their ores which consists in treating the ore with the mixture of a solution of sulphuric acid and a solution of potassium-bromide and bringing the mass in contact with mercury.
(Specification, 3s.)
[NOTE.—Here follow five other claims.]

No. 30534.—22nd November, 1911.—HERBERT SHARPLES McCORMICK, of No. 3012 Bennevenue Avenue, Berkeley, Alameda County, California, United States of America. An improved heater attachment for explosive engines.
Claims.—(1.) The combination with the cylinders of an explosive engine, of a heating-coil located within the firing-chamber of each cylinder of the engine, and means for supplying an electric current to the said coils. . . . (6.) In an explosive engine, the combination with the cylinders thereof, of a heating-device situated within the firing-chamber of each cylinder, devices for delivering an explosive mixture on to the surface of said devices, and electrical means for passing an electric current through the devices for the heating thereof.
(Specification, 9s.)
[NOTE.—Here follow two other claims.]

No. 30537.—18th March, 1911.†—JOHN ANDERSON, of Craiglea, Tayport, Fifeshire, North Britain, Gentleman. Improvements in feathering wind-sails or propellers applicable for windmills, airships, and other purposes.
Extract from Specification.—A feature of most of the present improved mechanisms resides in the fact that a ring, coupling-sleeve, or slider moves along a respective sail-spindle or parallel with the axis thereof, and is linked to arrangements for swaying the respective sail, the ring, sleeve, or slider, being operated owing to the revolution of the wheel-like frame supporting the sails.
(Specification, 14s.)
[NOTE.—The above extract from the specification is inserted in place of the claims.]

No. 30556.—24th November, 1911.—JUAN FORSECK, of Apartado, 748 La Nuevo Mexico 11, Mexico D.F. Improvements in machines for hackling fibrous plants.
Claim.—(1.) A hackling-machine comprising two conveyor-chains moved together one above the other, a channelled conveyor-wheel which guides the adjacent extensions of said chains into a semicircular course, a hackling-drum in the form of a truncated cone converging in opposite direction of the advancing chains, a second hackling-drum equal to the first but oppositely revolved and transversely to the travel of a single corresponding conveyor-chain which is guided into a semicircular path by a channelled conveyor-wheel with an elastic tire, a drum adapted to rotate at the side of said single chain, and a continuous rubber belt resting on and moved with said drum for removing the fibers.
(Specification, 6s.)
[NOTE.—Here follow four other claims.]

No. 30560.—30th September, 1911.†—HERBERT ALFRED HUMPHREY, of 38 Victoria Street, Westminster, London, England, Consulting Engineer. Improvements in methods of and apparatus for raising or forcing liquids.
Claim.—(1.) Apparatus for raising or forcing liquids or fluids wherein a column of liquid is propelled outwardly from a combustion chamber or chambers by the energy of expansion of an ignited combustible mixture and in which a column of liquid flows inwardly towards the combustion chamber or chambers to compress or assist in compressing a fresh combustible charge, so constructed that in the chamber or chambers into which elastic fluid is introduced, or from which elastic fluid is discharged, the walls of the space wherein elastic fluid is retained and compressed have a surface without valves for elastic fluid or projections to accommodate means of inlet or outlet of elastic fluid, substantially as described.
(Specification, £1 6s.)
[NOTE.—Here follow fifteen other claims.]

No. 30561.—27th November, 1911.—HAROLD VIVIAN MARKS, of 42 Jones Street, Pyrmont, Sydney, New South Wales, Australia, Engineer. An improved machine for forming sheet-metal heads upon nails and the like.
Extract from Specification.—This machine comprises means for feeding a strip or ribbon of sheet metal on to a revolving table above which are arranged a series of specially constructed dies for punching or stamping the washers from said strip or ribbon, means for delivering the said washers upon the said table into position for receiving the nails, means for feeding the nails into position above the said washers, and means for driving the said nails through the washers, causing them to penetrate the same to form the heads of the required shape. Means are also provided for ejecting or discharging the nails, having the heads or washers attached thereto, from the machine. Mechanical means are provided for controlling and timing the movements of the various working-parts in order that the washers or heads may be stamped from the metal strip or ribbon and brought under the nails, which are then driven through the washers or heads and finally ejected from the machine.
(Specification, 15s.)
[NOTE.—The above extract from the specification is inserted in place of the claims.]

No. 30571.—4th January, 1911.†—WILLIAM HENRY BAUERT, of Forbes, New South Wales, Australia, Farmer. Improvements in oil cans and dischargers, and mode of bulging out caved-in buckling-areas.
Claim.—(1.) An oil-can having in addition to one or more springy thumbpieces or buckling-areas one or more reinforced strike sides.
(Specification, 4s. 3d.)
[NOTE.—Here follows one other claim.]

No. 30581.—1st December, 1911.—ARTHUR EDWARD GILL, of Redwood’s Valley, Nelson, New Zealand, Farmer. An improved clod-crusher.
Extract from Specification.—A frame carries a series of pivoted slabs, the angle of which is adjustable by means of rods and screws.
(Specification, 3s. 6d.)
[NOTE.—The above extract from the specification is inserted in place of the claims.]

No. 30588.—5th December, 1911.—CHARLES ANTHONY VANDERVELL and ALBERT HENRY MIDGLEY, both of Warple Way, Acton Vale, Middlesex, England, Electrical Engineers. Improvements in and relating to variable-speed self-regulating dynamo electric machines.
Claim.—(1.) In a variable-speed dynamo electric machine having ordinary and supplementary poles, the arrangement of brushes, magnet-coils, and connections in which certain of the armature conductors situated out of the zone of magnetic influence of the supplementary poles are individually short-circuited by the brushes, and the current flowing in a certain portion of the armature conductors only—which lie under the supplementary poles and carry the working-current—is utilized to demagnetize the magnetic field of the ordinary poles to secure self-regulation with sparkless commutation, and means for eliminating the disturbing effect of the current flowing in the armature conductors lying under the ordinary poles on the constancy of the voltage and current at the main brushes, substantially as described.
(Specification, 10s. 6d.)
[NOTE.—Here follow eight other claims.]

No. 30590.—9th December, 1910.†—PIERRE FERRA, formerly of 3 Rue Charpenay, now of 101 Route de Strasbourg, Caluire-et-cuire, pres Lyon, France, Consulting Engineer. A new compound applicable as a heat-insulating material and for other purposes.
Claim.—(1.) A compound consisting of copper-sulphide, sulphur, and kaolin, or a substance having the characteristics thereof, for the purposes and substantially as described.
(Specification, 3s. 6d.)
[NOTE.—Here follow two other claims.]

No. 30591.—5th December, 1911.—JÖNS LAURITZ NILSSON, of Humlegardsgatan 29, Stockholm, Sweden, Lawyer. Improvements in the method of regulating the temperature of the cooling-liquid and the percentage of moisture of the air in refrigerating-devices and in means adapted therefor.
Claim.—(1.) In a refrigerating process by means of a liquid, circulating through a conduit and an ice-receptacle, and salt, the method of adjusting the percentage of salt by leading the liquid current or a part of the same, controlled by means of a cock or the like, through a special chamber, containing the salt, or in adding to the said liquid a liquid having a greater percentage of salt, the liquid last mentioned being supplied from a receptacle or refrigerating-conduit or the like through a conduit provided with a regulating-device.
(Specification, 12s.)
[NOTE.—Here follow nine other claims.]