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THE NEW ZEALAND GAZETTE.
[No. 6

No. 11731.—22nd June, 1899.—HARRY PHILLIPS DAVIS, of 327, Neville Street, Pittsburg, Pennsylvania, United States of America, Electrical Engineer; GILBERT WRIGHT, of 409, Ross Avenue, Wilkinsburg, Pennsylvania aforesaid, Electrical Engineer; and ALEXANDER JAY WURTS, of Fifth Avenue, Pittsburg aforesaid, Engineer. Improvements in controllers for electric motors.*

Claims.—(1.) A controller for electric motors in which a separate circuit making and breaking switch is provided for automatically breaking the circuit before the connections of the motors can be changed from series to parallel, or when the controller is moved backwards. (2.) The special devices for automatically operating the circuit making and breaking switch, substantially as described with reference to Figs. 1 to 9 of the drawings. (3.) The combination with a controller for electric motors of a separate circuit making and breaking switch automatically operated by the movement of the controller-drum, and with its contacts located in a closed box filled with a suitable liquid such as glycerine, substantially as and for the purpose specified. (4.) A controller for electric motors in which a certain amount of lost motion or play is provided between the operating-shaft and the drum carrying the movable contacts, and a toothed wheel is provided on the drum, co-operating with a spring pawl, so that when said drum has been rotated a certain amount by the operating-shaft the pawl and wheel act to cause said drum to move quickly, and in advance of the movement of the shaft, through the next portion of its path, for the purpose specified. (5.) The combination with a controller for electric motors of a separate circuit making and breaking switch, the shaft of which is connected to the controller-shaft through a friction-clutch, which is arranged to be operative to connect the shafts while the controller is varying the resistance in circuit, but being inoperative while the connection of the motors is being changed from series to parallel, at which time the circuit making and breaking switch is actuated by the agency of a spring to break the circuit. (6.) The combination with a controller for electric motors of a separate circuit making and breaking switch operatively connected to the controller-shaft, and arranged as described with reference to Figs. 12 and 13 of the drawings.
(Specification, 15s.; drawings, £2 2s.)

No. 11966.—6th September, 1899.—WILLIAM EDWARD RAMSAY, of Abberley Road, St. Albans, Canterbury, New Zealand, Builder. The improvement of sash-weights.*

Claims.—(1.) The improvements in sash-weights substantially as described, and illustrated in the drawings. (2.) A sash-weight having a slit or notch a formed in its upper end, in which slit or notch a pulley b rotates upon a pivot c (preferably a clout-nail) fitted in holes d formed in cheeks e, such holes being preferably tapered from one side substantially as set forth. (3.) A sash-weight having a slot i formed therein at a suitable distance from the upper end, in which slot a pulley b rotates upon a pivot j fitted in holes in said weight, substantially as set forth.
(Specification, 2s. 6d.; drawings, 5s. 6d.)

No. 12248.—21st December, 1899.—EDWARD LACEY ANDERSON, of 1823, Cora Place, St. Louis, Missouri, United States of America, Electro-chemist. Improvements in the chemical generation of electricity.

Claims.—(1.) In a chemical generator of electricity, the combination of a pair of electrodes or elements, one of which is carbon, a solution of hydrofluoric acid, and means for supplying oxygen to the cell, substantially as described. (2.) In a chemical generator of electricity, the combination of a pair of electrodes, one of which is carbon, a solution of hydrofluoric acid, and a chemical, such as chromic acid, capable of supplying oxygen to the cell. (3.) In a chemical generator of electricity, the combination of a pair of electrodes, one of which is lead, and a solution of hydrofluoric acid. (4.) In a chemical generator of electricity, a solution of hydrofluoric acid, an electrode of carbon, and another electrode of material capable of furnishing oxygen to the cell. (5.) A chemical generator of electricity comprehending a solution of hydrofluoric acid and two electrodes, one of which is carbon and the other peroxide of lead. (6.) A chemical generator of electricity comprehending a pair of electrodes, one of which is carbon and the other of material capable of furnishing oxygen to the cell, a solution of hydrofluoric acid, and a suitable depolarising agent. (7.) In a chemical generator of electricity, two carbon electrodes immersed in solutions of hydrofluoric acid, separated by a porous diaphragm, and a material in one of said solutions capable of furnishing oxygen, substantially as described.
(Specification, 3s. 3d.)

No. 12270.—30th December, 1899.—EDWARD SHAW, of Broad Street House, London, England, Engineer. Improvements in apparatus for cooking, concentrating, and evaporating liquids, more particularly for use in the manufacture of sweetmeats.

Claims.—(1.) Apparatus for cooking, concentrating, and evaporating liquids, comprising an externally heated tube, a chamber into which said tube discharges, means for removing vapour from said chamber and causing a low pressure therein and in the externally heated tube, and means for causing or permitting the removal of the treated liquid, as set forth. (2.) Apparatus for cooking, concentrating, and evaporating liquids, comprising an externally heated tube, a chamber into which said tube discharges and which is formed with a liquid-discharging aperture, means for removing vapour from said chamber and causing a low pressure therein and in the externally heated tube, and means for periodically causing an increased pressure in said chamber, as set forth. (3.) Apparatus for cooking, concentrating, and evaporating liquids, comprising an externally heated tube, means for feeding liquid thereto, means for exhausting air or vapour therefrom, and a valve controlling the passage of liquid from the feeding-means to the cooking-coil, said valve being so loaded as to open only when the pressure against it exceeds a predetermined pressure, as set forth. (4.) Apparatus for preparing syrup for use in the manufacture of sweetmeats, comprising an externally heated tube through which the syrup is passed, means for exhausting vapour, and a valve that opens communication between said coil and exhausting-means only when the pressure in the coil exceeds a predetermined pressure, as set forth. (5.) Apparatus for cooking, concentrating, and evaporating liquids constructed, arranged, and operating substantially as described with reference respectively to sheets 1 and 2, to sheet 3, and to sheet 4 of the drawings. (6.) In apparatus for cooking, concentrating, and evaporating liquids, a device for effecting the separation of the liquid from the vapour, and causing the discharge of the liquid, constructed, arranged, and operating substantially as described with reference to and shown in sheet 8 of the drawings.
(Specification, 9s. 6d.; drawings, £2 2s.)

No. 12274.—3rd January, 1900.—JOHN ANDERSON, of Moray Place, Dunedin, New Zealand, Engineer and Brassfounder. Automatic cream-temperature controller.

Claims.—(1.) In an appliance for cooling or warming cream to bring it to the required temperature, the combination of cream-vats such as A or A¹ with a set of coils made of light tubes such as B, capable of being lifted out of or lowered into the cream in the said vats, and of allowing fluid of the required temperature to circulate through them whilst reciprocating slowly through a vat, and also with the connections and apparatus such as set forth and as illustrated in the diagrams. (2.) In combination, coils such as B, capable of being lowered into or withdrawn from, or partly withdrawn from, a cream-vat such as A, and also capable of being used in other vats such as A¹, A¹, reciprocating slowly through the cream while a fluid passing through the coils brings the cream to the desired temperature, together with the connections, valves, and apparatus for working the whole substantially as shown and described, and for the purposes set forth.
(Specification, 2s. 6d.; drawings, 5s. 6d.)

No. 12276.—4th January, 1900.—HENRY JAMES KIMMAN, of 1235, Lawndale Avenue, Chicago, Illinois, United States of America, Machinist. Improvements in and relating to pneumatic drills and the like.

Claims.—(1.) In pneumatic drills or the like, a reversing throttle-valve, such as g, substantially as described with reference to the drawings and for the purpose specified. (2.) In pneumatic drills or the like, fixed pivotal valves, said valves each having two ports or passages adapted to act as inlet- or exhaust-passages for pressure to and from the cylinders, and operating substantially as described with reference to the drawings and for the purpose specified. (3.) In pneumatic drills or the like, the combination of a reversing throttle-valve, passages such as E, E¹, E², E³ in the drill casing or framework, each passage adapted to act as inlet or exhaust for pressure to and from the cylinders, and fixed pivotal cylinder-valves, each having two ports, each of said ports being adapted to act as inlet to or exhaust from the cylinder, the whole operating substantially as described for the purposes specified and as illustrated in the drawings.
(Specification, 6s.; drawings, £1 10s.)