Aug. 3.] THE NEW ZEALAND GAZETTE. 1437

No. 11532.—14th April, 1899.—BENJAMIN GARVER LAMME, of 230, Stratford Avenue, Pittsburg, Pennsylvania, United States of America, Electrical Engineer. Improvements in systems for converting the energy of alternating electric currents into mechanical energy by means of induction motors.*

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Claims.—(1.) The combination with an induction motor of means whereby the electro-motive force supplied to the primary member is automatically varied dependent on the current flowing in said member, for the purpose specified. (2.) The combination with an induction motor having a small degree of magnetic leakage and a relatively high resistance in the secondary member, of a reactive or choke coil inserted in each of the circuits of the primary member, the cores of the said coils becoming saturated by a predetermined amount of current, for the purpose specified. (3.) The various systems of operating induction motors substantially as described.
(Specification, 7s.; drawings, 8s.)

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No. 11534.—15th April, 1899.—HARRY PHILLIPS DAVIS, of 327, Neville Street, Pittsburg, Pennsylvania, United States of America, Electrical Engineer. Improvement in controllers for electric motors.*

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Claims.—(1.) A controller for electric motors in which the switch for varying the resistance in circuit with the motors is separated from the switch for varying the connections of the motors, the shafts of the two switches being connected by gearing so constructed that the operation of the resistance-switch rotates the shaft of the other switch at different speeds at different periods of its movement, for the purpose specified. (2.) A controller in which is provided a switch for varying the resistance in circuit, a second switch for varying the connections of the motors from series to parallel and vice versâ, a third switch for reversing the connections of the motors when required, and cut-out switches for cutting either of the motors out of circuit when desired, the second-named switch being connected by gearing with the resistance-varying switch, and through interlocking devices with the reversing and the cut-out switches, substantially as described. (3.) A controller in which is provided a resistance-varying switch connected by gearing with a switch for varying the connections of the motors, and combined cut-out and reversing switches connected through interlocking mechanism with the switch for varying the connections of the motors, substantially as described. (4.) Controllers for electric motors constructed and operating substantially as described.
(Specification, 10s.; drawings, £3 3s.)

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No. 11565.—19th May, 1899.—WILLIAM INMAN DAVIS, of Palace Restaurant, Reefton, New Zealand, Carpenter. Improvement in dredges.

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Claims.—(1.) In dredging apparatus, the employment of grapnels or digging-hooks upon the bucket-chain arranged to automatically project beyond the dredge-buckets during a portion of their travel, substantially as and for the purposes described, and illustrated in the drawings. (2.) In dredging apparatus, the employment of automatically extending grapnels formed by extending a pair of links of the chain and bending the extended portion of the said links into hook-shape, substantially as and for the purposes described, and illustrated in the drawings. (3.) In dredging apparatus, the employment of automatically extending grapnels upon the bucket-chain, said grapnels being formed by bending into hook-shape the extended ends of a pair of links of the chain, said links being connected together by a metal plate riveted upon them and passing between the hooks and riveted to the curved portion thereof, substantially as and for the purposes described, and illustrated in the drawings.
(Specification, 2s. 3d.; drawings, 3s.)

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No. 11627.—12th May, 1899.—WILLIAM LINDSAY CORSON, of San Francisco, United States of America, Engineer. Improvements in gas or internal-combustion motive-engines.*

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Claims.—(1.) In a gas-engine, a main cylinder, and cam-shaft 4 set parallel thereto, the latter provided with the eccentric or crank 27, and the connecting-rod 29, having an adjustable and oscillating bearing 30, and a hinged pawl thereon to operate the igniting-devices, substantially as specified. (2.) In a gas-engine, the cam-shaft 4, crank 27, motion-rod 29, and oscillating bearing 30, the latter eccentrically mounted and adjustable about its supporting axis, so as to change the position of the rod 29 and the point at which the pawls 56 and 57 will engage in respect to the position of the crank 27 and of the engine crank-shaft connected thereto, substantially as specified. (3.) In a gas-engine, the motion-rod 29, crank 27 to operate the same, the block 60, and hinged pawl 56 mounted thereon, the oscillating and adjustable bearing 30 and adjustable member 32 provided with a handle 34, whereby the rod 29 can be instantly set to engage the pawls 56 and 57 at earlier or later points of the engine’s stroke, operating substantially as described. (4.) In a gas-engine, the detachable member 5 on which the electrodes are supported, adapted to be bolted upon and project within the combustion-chamber, an oscillating stem 46 for a movable electrode, and an adjustable stem 41 forming a fixed electrode, the latter stem screw-threaded and fitting in an insulated shell 42, an extension and collar 40 adjustable circumferentially and also laterally by turning the stem, in the manner substantially as specified. (5.) In a gas-engine, fixed and movable electrodes 40 and 45, the latter having a flat section and passing through the oscillating stem 46 adjustably held therein, movable outwards and inwards to present new contact-surfaces against the fixed electrode 40, substantially as specified. (6.) In a gas-engine, an igniting-apparatus consisting of the electrodes 40 and 45, the latter adjustably held in the oscillating stem 41, a spring 49 tending to hold the electrodes out of contact, spring 49 being attached to the oscillating stem and to the member 5, and a stronger spring 50 attached to a loosely mounted device 51 and to the stem 46, tending to turn this stem and close the contacts 40 and 45, substantially as shown and described. (7.) In a gas-engine, the rotating or screw-threaded stem 41 and fixed electrode 40 thereon, the stem adjustable by turning about its axis, and also outward and inward through the insulated shell 42, a binding-nut 43 to connect an electric wire, and a jam-nut 44 to secure and hold the parts, in the manner substantially as specified.
(Specification, 6s. 9d.; drawings, 8s.)

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No. 11676.—6th June, 1899.—EDMUND RILEY, Jun., of Flinders, Victoria, Telegraph-operator. An improved machine for cutting fern and scrub.*

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Claim.—The described machine for cutting fern and scrub, consisting of a dray or other vehicle fitted with a spindle or axle driven from the wheels of the vehicle and communicating motion to a vertical spindle carrying a rotating cutter at its lower end, substantially as and for the purposes described and explained.
(Specification, 2s. 3d.; drawings, 11s.)

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No. 11708.—12th June, 1899.—HENRY AYLMEB, of Richmond, Quebec, Canada, Gentleman, and JAMES HENRY PLUMMER, of 40, Wellesley Street, Toronto, Ontario, Canada, Gentleman. Improvements in drills for boring.

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Claims.—(1.) In a drill, in combination, the stock having a receiving-socket in the end thereof, a bit or point having the inner end adapted to fit into the receiving-socket, and an opening leading through the stock into the socket, and means for holding the point in position, as and for the purpose specified. (2.) In a drill, the combination with the body proper provided with a groove extending across the end, and side notches or holes extending into the groove in the centre of the sides of the drill-point, having a correspondingly formed base to the groove in the body, and a central hole, and a pin extending through the notches and central hole in the joint, as and for the purpose specified. (3.) In a drill, in combination, the stock having a receiving-socket therein, with an inclined or tapering portion, a bit fitted to said socket having a correspondingly tapering portion, and an opening leading through the stock to the inclined or tapering portion of the socket, substantially as described.
(Specification, 3s. 3d.; drawings, 5s. 6d.)