May 16.]

No. 13598.-9th May, 1901.-GEORGE JONES ATKINS, of
the Laboratory, Ruskin Road, Tottenham, Middlesex, England, Metallurgical Chemist. Improvements in the production of oxychloride salts for the subsequent manufacture of chlorine, an apparatus therefor, and in the employment of such salts for bleaching, for disinfecting, for the treatment of metals and metallic ores, and so forth.

Claims.--(1.) The production of a compound salt (useful for the subsequent manufacture of chlorine) by the electrolytic decomposition of chlorides of alkalis or alkaline earths, such as sodium-chloride, for example, which electrolytic decomposition is conducted under conditions where hydrogen is evolved, and the whole, or practically the whole, of the oxygen and chlorine are kept in the solution, substantially as described. (2.) The described and illustrated apparatus for electrolytically decomposing the chlorides of alkalis or alkaline earths. (3.) A process for obtaining chlorine in a nascent condition and over a protracted period of time, substantially as described. (4.) The treatment of metals and metallic ores with nascent chlorine, produced in the manner described. (5.) The use of nascent chlorine produced in the manner described for the purpose of bleaching. (6.) The use of chlorine produced in the manner described for the purpose of disinfecting, and so forth.

(Specification, 6s.; drawings, ls.)

No. 13599.-9th May, 1901.-BENJAMIN TALBOT, of Westminster Chambers, East Parade, Leeds, York, England, Engineer. Improvements in the art of manufacturing iron and steel.

Claims.--(1.) The improvements in the manufacture of iron and steel in the open-hearth process characterized by the fact that a mass of molten slag is always maintained on the surface of the bath, such slag containing a greater percentage of oxide than is necessary to oxidize the carbon in the metal, whereby large volumes of carbonic-oxide gas are rapidly produced and burnt in the furnace, generating an intense heat therein, and greatly quickening the purification of the metal treated, and lessening the amount of fuel ordinarily used. (2.) In the process described by the foregoing claim, the modification by which the process is made continuous, consisting of continuously withdrawing portions of the exhausted slag, enriching the remainder with additions of fresh oxide, preferably in a molten condition, and pouring therethrough the metal to be purified, and withdrawing from beneath a proportionate quantity of the purified metal.

(Specification, 3s. 9d.)

No. 13600.-9th May, 1901.-WALTER McDermOTT, of 43, Threadneedle Street, London, England, Mining Engineer. Improvements in screening crushed ore and other materials.

Claims.--(1.) In apparatus for screening ores or other materials, the combination of an inclined submerged screen surface, a water-tank having two compartments, with both of which said screen communicates, and means for compelling all particles capable of passing through said screen, and irrespective of their specific gravities, to be deposited in the first compartment, and all larger particles to be deposited in the second compartment. (2.) In apparatus for screening ores or other materials, and in combination, an inclined submerged screen surface, a water-tank having two compartments, with both of which said screen communicates, means for imparting motion to the particles on said screen, means for preventing particles capable of passing through the screen from entering the second compartment, and means for withdrawing the smaller particles from the first compartment and the larger particles from the second compartment. (3.) In apparatus for screening ores or other materials, and in combination, an inclined submerged screen surface, a water-tank having two compartments, with both of which said screen communicates, means for imparting motion to the particles on said screen, and a water-supply to the second compartment adapted to prevent the inflow thereto of any particles capable of passing through the screen.

(Specification, 7s. 6d.; drawings, ls.)

No. 13601.-9th May, 1901.-LUDWIG GROTE, of 84B, East India Dock Road, Poplar, London, England, Manager of Works. Improvements in or relating to machinery for manufacturing glass bottles or the like.

Claims.--(1.) A glass-bottle-blowing machine having in combination a mould in which the head of the bottle is cast, a plunger having a flattened mouth-forming portion, and means for simultaneously rotating and thrusting the same into the molten glass while within said mould. (2.) A glass-bottle-blowing machine having in combination a mould in which the head of the bottle is cast, a plunger having a flattened mouth-forming portion, and means for thrusting the same into the molten glass while within said mould, and for retracting the same, and for rotating the same during the longitudinal movement. (3.) A glass-bottle-blowing machine having in combination a mould in which the head of the bottle is cast, an imperforate plunger having a flattened mouth-forming portion, and means for thrusting the same into the molten glass while within said mould, for retracting the same, and for rotating the same during its longitudinal movement. (4.) A glass-bottle-blowing machine having in combination a mould in which the head of the bottle is cast, a centrifugal mouth-forming plunger, and means for simultaneously rotating and thrusting the same into the molten glass while within said mould, thereby solidifying the head of the bottle, and shaping its mouth to receive a cork. (5.) A glass-bottle-blowing machine having in combination a mould in which the head of the bottle is cast, a plunger having a flattened mouth-forming portion, a casing surrounding the plunger in which the plunger may rotate freely and which admits air around the plunger, and means for thrusting the mouth-forming portion of the plunger into the molten glass in the mould, and for rotating the same to form the mouth with a smooth inner cylindrical surface. (6.) A glass-bottle-blowing machine having in combination a mould in which the head of the bottle is cast, an imperforate plunger having a flattened mouth-forming portion, a casing surrounding the plunger in which the plunger may rotate freely and which admits air around the plunger, means for supplying air under pressure to the casing, and means for thrusting the mouth-forming portion of the plunger into the molten glass in the mould, and for rotating the same to form the mouth with a smooth inner cylindrical surface. (7.) A glass-bottle-blowing machine having in combination a mould in which the head of the bottle is cast in inverted position, a plunger having a flattened mouth-forming portion, means for thrusting the same upward into the molten glass and retracting the same, and for simultaneously rotating the same, a casing for said plunger, and a swivelled bushing within said casing having a bore corresponding in cross-section with said mouth-forming portion. (8.) A glass-bottle-blowing machine having in combination a mould in which the head of the bottle is cast in inverted position, an imperforate plunger having a flattened mouth-forming portion, means for thrusting the same upward into the molten glass and for retracting and simultaneously rotating the same, a casing for said plunger, and means for forcing air into the glass simultaneously with and around said mouth-forming portion. (9.) A glass-bottle-blowing machine having in combination a mould in which the head of the bottle is cast in inverted position, an imperforate plunger having a flattened mouth-forming portion and an air-propelling shoulder, a casing for said plunger having an air-chamber discharging around said mouth-forming portion, and means for reciprocating and rotating said plunger. (10.) A glass-bottle-blowing machine having in combination a mould, a rotatable plunger having a spiral groove therein and an imperforate flattened mouth-forming portion adapted to enter the molten glass, and a casing for said plunger, said spiral groove forming a vent for the escape by way of said casing of heated air of excessive pressure. (11.) A glass-bottle-blowing machine having in combination a casing, a neck-mould clasped upon said casing, and other moulds adapted to be aligned with said neck-mould, a rotatable plunger reciprocating through said casing and having a spiral groove therein, a stud in said casing engaging said spiral groove, an air-conduit communicating with said casing, and means for reciprocating said plunger. (12.) In a glass-bottle-blowing machine, the combination with a disc having a hub thereon, moulds carried by said disc, and a toothed pinion on the hub of said disc, of a toothed segment engaging said pinion, lever arms pivoted to the ends of said segment and to the frame of the machine, a spring connected with one end of the segment and a treadle connected with the other end of said segment to turn said disc, and stops on the disc and on the frame of the machine to limit the rotation of said disc. (13.) In a glass-bottle-blowing machine, the combination with a shaft, a disc mounted on said shaft, moulds carried by said disc, and means for rotating said disc through one-half a revolution, of an air-pump connected with said shaft, to be operated by the rotation of said disc. (14.) In a glass-bottle-blowing machine, the combination with a shaft, a disc mounted on said shaft, moulds carried by said disc, and means for rotating said disc through one-half a revolution, of an air-reservoir, an air-duct leading from the reservoir through said shaft and disc to the moulds, and an air-pump communicating with said reservoir and connected with the shaft, to be operated by the rotation of the disc, substantially as described. (15.) In a glass-bottle-blowing machine, the combination of a plunger having a flattened point, means for reciprocating and rotating the same, a plunger-casing,