Claims. —(1.) The described method of vaporising and burning hydrocarbon oils, which consists in forcing the oil in a fine stream or spray through a flame, mixing air with the vapour formed by the action of the flame upon the oil to form a gas, and conducting the gas to a burner. (2.) The described apparatus for vaporising hydrocarbon oils, comprising in combination a mixing-tube, means for forcing a fine stream or spray of oil into the mixing-tube, means for maintaining a vaporising-flame within the mixing-tube about the stream or spray of oil, and means for supplying air above the flame to mix with the vapour generated from the stream or spray to form a gas. (3.) The described combined gas-and-vapour burner, comprising a mixing-tube, means for supplying a fixed combustible gas to the mixing-tube, means for forcing oil in a fine stream or spray into the mixing-tube, and means for maintaining a vaporising-flame within the mixing-tube about the stream or spray of oil.

(Specification, 12s.; drawings, 2s.)

No. 13579.—3rd May, 1901.—CHARLES HERBERT CURTIS, CLEMENT LEIGH WATSON SMITH, DAVID JAMES METCALFE, and ALFRED COPLEY PEARCY, all of 3, Gracechurch Street, London, England, and ANDREW FULLER HARGREAVES, of Roslin, Midlothian, Scotland, Gunpowder-manufacturers. Improvements in explosives.

Claims.—(1.) The addition of carbonate of magnesium to explosives of the nature specified, in the manner and for the purposes described. (2.) The addition of carbonate of manganese to explosives of the nature specified, in the manner and for the purposes described.

(Specification, 4s.)

No. 13580.—1st May, 1901.—ROSE MARY BADDELEY, wife of Arthur Baddeley, of Mount Eden Road, Auckland, New Zealand, Agent. A sliding ventilator for doorways, windows, and all open spaces of buildings.

Claims.—(1.) In a ventilator for doorways, windows, and other open spaces of buildings, a recess beside the door, window, or open space, between the outer and inner walls, for holding a sash-carrying mesh, to move on travelling-way of beading or rollers between outer and inner studs into doorway, open window, or other opening, for the purpose set forth, substantially as described and illustrated. (2.) In a ventilator for doorways, windows, and other open spaces of buildings, a frame having recess within it beside the door, window, or open space, outside the outer wall, for holding a sash-carrying mesh, to move on travelling-way of beading or rollers between outer and inner studs into doorway, open window, or other opening, for the purpose set forth, substantially as described and illustrated. (3.) In a ventilator for doorways, windows, and other open spaces of buildings, a frame having recess within it beside the door, window, or open space, inside the inside wall, for holding a sash-carrying mesh, to move on travelling-way of beading or rollers between outer and inner studs into doorway, open window, or other opening, for the purpose set forth, substantially as described and illustrated. (4.) In a ventilator for doorways, windows, and other open spaces of buildings, in combination, a frame, an outer and an inner stud within said frame, a recess on one side of said studs, doorway, window, or other opening on other side of said studs, travelling-way of bead or rollers for sash with mesh to run on, sash with mesh to rest in said recess or to move on said travelling-way into said doorway or window opening, said sash having groove to fit loosely on said travelling-way, and with or without rollers beside said groove, all for the purpose set forth, substantially as described and illustrated.

(Specification, 3s. 9d.; drawings, 1s.)

No. 13588.—4th May, 1901.—LEWIS MARKS, of New Plymouth, New Zealand, Tailor. An improved apparatus for shrinking cloth.

Claim.—In an apparatus for shrinking cloth, a perforated cylinder of suitable metal, closed at each end, mounted on a perforated steam-pipe suitably supplied with steam, substantially as drawn and described.

(Specification, 1s.; drawings, 1s.)

No. 13593.—9th May, 1901.—JOHN HARVEY KELLOGG, of Battle Creek, Michigan, United States of America, Physician. Improvement in vegetable-food compounds.

Claims.—(1.) A food product composed of gluten, water, and meal of edible oleaginous nuts, mixed together and cooked as set forth. (2.) A food product composed of the gluten of wheat, water, and the meal of edible oleaginous nuts, mixed together and cooked substantially as set forth. (3.) A food product composed of the gluten of wheat, water, and peanut meal, mixed together and cooked substantially as set forth.

(Specification, 4s.)

No. 13594.—9th May, 1901.—HENRY MOORE SUTTON and WALTER LIVINGSTON STEELE, both of 194, North Jefferson Street, Dallas, Texas, United States of America, Electricians. An improved process of and apparatus for separating a conductive substance from a non-conductive substance.

Claims.—(1.) The process of separating a conductive substance from a non-conductive substance, or one of relatively inferior conductivity, which consists in electrically charging the mass and exposing the same to a screening-member which is capable of electrical repulsive action, substantially as specified. (2.) The process of separating a conductive substance from a non-conductive substance, or one of relatively inferior conductivity, which consists in electrically charging the mass and exposing the same to a screening-member which is capable of electrical repulsive action upon the conductive substance, and removing the non-conductive particles by an extraneous force, substantially as specified. (3.) In an ore-concentrator, the combination with an electrified surface of a screening-device capable of electrical repulsive action disposed adjacent thereto, substantially as specified. (4.) In an ore-concentrator, the combination with an electrified surface of a screening-device capable of electrical repulsive action disposed adjacent thereto, and means for conducting non-metallic particles which may pass through said screen, substantially as specified. (5.) In an ore-concentrator, the combination with an electrified surface of a screening-device capable of electrical repulsive action disposed adjacent thereto, means for conducting non-metallic particles which may pass through said screen, and hoods extending from said conducting means and disposed adjacent to said screen, substantially as specified. (6.) In an ore-concentrator, the combination with an electrified surface of a screening-device capable of electrical repulsive action disposed adjacent thereto, means for conducting non-metallic particles which may pass through said screen, hoods extending from said conducting means and disposed adjacent to said screen, and a feeding-device adapted to discharge upon said surface, substantially as specified. (7.) In an ore-concentrator, the combination with a moving ore-conveying surface of means for electrically charging the same, an exhaust-device provided with hoods disposed above said surface, and electrically repulsive screens disposed between said surface and hoods, substantially as specified. (8.) In an ore-concentrator, the combination with a moving ore-conveying surface of means for electrically charging the same, an exhaust-device provided with hoods disposed above said surface, electrically repulsive screens disposed between said surface and hoods, and a feed-hopper adapted to discharge upon said moving surface, substantially as specified. (9.) In an ore-concentrator, the combination with a moving ore-conveying surface of means for electrically charging the same, an exhaust-device provided with hoods disposed above said surface, electrically repulsive screens disposed between said surface and hoods, a feed-hopper adapted to discharge upon said moving surface, a rocking-shaker disposed between said hopper and moving surface, and a receptacle to receive material discharged from said surface, substantially as specified. (10.) In an ore-concentrator, the combination with an electrified surface of an electrically repulsive device disposed adjacent to said surface, and provided with apertures through which non-metallic particles may pass, while metallic particles will be repelled by said device, substantially as specified.

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

No. 13597.—9th May, 1901.—MARCONI’S WIRELESS TELEGRAPH COMPANY, LIMITED, of 18, Finch Lane, London, England (assignee of John Ambrose Fleming, of University College, Gower Street, London, England, Doctor of Science). Devices for wireless telegraphy.

Claims.—(1.) In apparatus for producing Hertz waves, the combination of a transformer the primary circuit of which is permanently closed, means for producing and means for varying an alternating current in the primary. (2.) In apparatus such as is referred to in claim 1, varying the current in the primary by varying the impedance of a coil or coils in circuit with it, or by mechanically interrupting an arc in the secondary. (3.) In apparatus such as is referred to in claim 1, means for varying the current in the primary, substantially as described and illustrated in the drawings. (4.) In apparatus for producing Hertz waves, the combination of an alternating-current transformer, a condenser charged by its secondary, and means enabling the primary to be opened and closed when the secondary is open, but not at other times. (5.) In apparatus for producing Hertz waves, the combination of two oscillation-transformers, two spark-gaps, and two condensers, substantially as described, and illustrated in Fig. 1. (6.) Apparatus for wireless telegraphy substantially as described, and illustrated in the drawings.

(Specification, 12s.; drawings, 1s.)