1794
THE NEW ZEALAND GAZETTE.
[No. 77

No. 11352.—2nd February, 1899.—ALFRED ELIAS ROBERTSON, of Motueka, Nelson, New Zealand, Blacksmith. An improved pole- and stump-jack.*

Claims.—(1.) In a pole- or stump-jack, jaws pivoted to the lever, and shaped eccentrically to their pivots, substantially as set forth. (2.) In a pole- or stump-jack, jaws pivoted to the lever, shaped eccentrically to their pivots, and armed with teeth, substantially as set forth. (3.) In a pole- or stump-jack, jaws pivoted to the lever, shaped eccentrically to their pivots, teeth upon the jaws, pins on lever, and stops on the jaws, substantially as set forth. (4.) The improved pole- and stump-jack consisting of parts constructed, arranged, and operating substantially as set forth.
(Specification, 1s. 9d.; drawings, 3s.)

No. 11494.—29th March, 1899.—HARRY PHILLIPS DAVIS, of 327, Neville Street, Pittsburg, Pennsylvania, United States of America, Electrical Engineer. Improvements in electric brakes.

Claims.—(1.) For an electrically propelled vehicle, a braking apparatus in which the brakes are applied to the wheels by the agency of electro-magnets supplied with current from the motors when they are cut off from the current-supply main and through the momentum of the vehicle act as generators, and further characterized by the arrangement that each brake-magnet is connected in series with one of the motors, the said motors and brake-magnets being connected in parallel whereby one motor cannot supply current in the proper direction to any other than its corresponding brake-magnet. (2.) In a braking apparatus of the kind described, an electro-magnetically actuated switch which cuts out the brake-magnets, thereby releasing the brakes when and as long as the motors are connected to the current-supply main, being controlled by a spring so as to cut in the brake-magnets as soon as the power-current is cut off from the motors. (3.) The improved electric braking apparatus constructed and operating substantially as described.
(Specification, 10s.; drawings, 8s.)

No. 11497.—29th March, 1899.—GEORGE WESTINGHOUSE, of Pittsburg, Pennsylvania, United States of America, Engineer. Improvements in electro-pneumatic controlling apparatus.*

[NOTE.—The title in this case has been altered. See list Provisional Specifications, Gazette No. 33, of the 13th April, 1899.]

Claims.—(1.) An electro-pneumatic mechanism so constructed and arranged that a mechanical device, forming a portion thereof, can be caused to execute a step-by-step movement in one direction, or a complete retrograde movement in a single step, by the application of fluid-pressure, the supply of which is governed by electro-magnetic devices, substantially as described. (2.) A modified form of the mechanism as claimed in claim 1, so arranged that some of the steps in the forward movement of the mechanical device are larger than others. (3.) In combination with the mechanism claimed in claim 1, an additional pneumatically operated piston, the stem of which acts as a stop to prevent the mechanical device moving forward more than one step at a time, said piston being projected in its cylinder by fluid-pressure, which is automatically admitted after the mechanical device has been moved forward a short distance. (4.) For electric motors, a controller operated by fluid-pressure which is governed by electro-magnetic means, substantially as described with reference to Figs. 1 to 7 of the drawings, either with or without the device for operating the reversing-switch. (5.) In a controller for electric motors, a reversing-switch, the shaft of which is operated by fluid-pressure acting on pistons connected with the said shaft, the application of fluid-pressure being governed by electro-magnetic devices. (6.) A circuit-breaker in which the movable member can be reset so as to make the circuit by admitting fluid under pressure to a cylinder having a piston which is in mechanical connection with the movable member, and can be operated to break the circuit by closing a circuit including an electro-magnet, and thereby admitting fluid under pressure to a cylinder to act on a piston, the movement of which piston trips the releasing apparatus of the breaker. (7.) A combination of the reversing-switch mechanism claimed in claim 5 with the circuit-breaker claimed in claim 6, in which the pneumatic cylinders of the former are connected with the cylinder of the latter, whereby the circuit-breaker is caused to make the circuit at the commencement of the operation of the reversing-switch. (8.) A circuit-breaker so arranged that it cannot be reset and the circuit made after being automatically interrupted unless the main controller is in its zero position, and until the reversing-switch is operated. (9.) A pneumatically operated circuit-breaker constructed substantially as described with reference to Figs. 14 to 18 of the drawings.

(10.) A governing device for controlling electric circuits which regulate the operation of pneumatic appliances so arranged that after the commencement of such operation the electric circuit is automatically broken at the governing device, and the parts returned to their initial position. (11.) For electro-pneumatically operated mechanism, a governing device constructed and operating substantially as described with reference to Figs. 8 to 13 of the drawing. (12.) For a train of electric vehicles, an electro-pneumatic circuit-breaker combined with an air-brake mechanism, so that the operation of the brakes causes the circuit-breaker to interrupt the circuit. (13.) In an electric vehicle, the combination with an air-brake system of a controlling device for the electric motors combined with the air-brake cylinder, so that the operation of the brake automatically causes the electric controller to return to its zero position, and so cuts the motors out of circuit.
(Specification, £1 1s.; drawings, £5 5s.)

No. 11714.—14th June, 1899.—ANDREW FARQUHARSON RIDLAND, of 2, Commercial Chambers, Manse Street, Dunedin, New Zealand, Mechanical Engineer. Improved method of and apparatus for and relating to obtaining auriferous material from the beds of rivers and the like.

Claims.—(1.) The method of obtaining auriferous material from the beds of rivers and the like consisting in the employment of an airtight tube pivotally supported at an inclination upon a floating vessel, said tube being hermetically sealable except at its lower end, which is open, and compressed air being employed within said tube to expel water therefrom and allow men to work therein, substantially as and for the purposes described. (2.) In apparatus for the purpose described, a tubular tunnel pivoted at its upper end upon a floating vessel, provided at its lower end with a working-chamber, substantially as and for the purposes specified and illustrated. (3.) In apparatus for the purpose described, a tubular tunnel pivoted upon a floating vessel, and lifting-gear upon the vessel whereby the lower end of said tunnel may be raised and lowered as desired, substantially as described and illustrated. (4.) In apparatus for the purpose described, a tubular tunnel pivotally supported at its upper end upon a floating vessel, a working-chamber at the lower end of said tunnel, and a railway within said tunnel upon which runs a trolley conveying material to the surface, substantially as and for the purposes described, and illustrated in the drawings. (5.) In apparatus for the purpose described, a tubular tunnel pivotally supported upon a floating vessel, and raised and lowered by suitable lifting-tackle upon the vessel, whereby its angle may be adjusted to suit the depth of the river-bed beneath the surface of the water, said tunnel having an approximately horizontal extension from its upper end, substantially as and for the purposes described, and illustrated in the drawings. (6.) In apparatus for the purpose described, a tubular tunnel pivotally supported upon a floating vessel, and a tank upon said tunnel adapted to carry ballast, and fitted with a sluice-valve by which water-ballast may be admitted thereto, substantially as and for the purposes specified, and illustrated in the drawings. (7.) In apparatus for the purpose described, a tubular tunnel pivotally supported upon a floating vessel, means for varying the inclination of said tunnel relatively to the water-level, and a receiver for material at the end of said tunnel above the surface of the water, substantially as described, and illustrated in the drawings. (8.) In apparatus for the purpose described, a tubular tunnel pivotally supported upon a shaft, said shaft being carried in bearings upon a floating vessel, and having a passage-way through which air is conveyed from a compressing-engine to the interior of the tunnel, substantially as and for the purposes specified and illustrated. (9.) In apparatus for the purpose described, a tubular tunnel supported upon a shaft, said shaft being carried in bearings upon a floating vessel, and having a passage-way through which telephone and electric-lighting wires are carried, substantially as and for the purposes specified and illustrated. (10.) The combination with a floating vessel of a gantry mounted at one end thereof, a chain or wire-rope passing over pulleys upon said gantry and led by guide-pulleys beneath the vessel, and a winch for operating said chain whereby boulders attached thereto may be brought to the surface, substantially as specified and illustrated. (11.) The combination with a bucket-dredge carried upon a vessel in the ordinary manner of a tubular tunnel supported at one end upon said vessel, and adapted to reach to the river-bottom, and means for supplying compressed air to the interior of said tunnel, whereby the water is expelled therefrom, substantially as and for the purposes specified and illustrated.
(Specification, 5s. 9d.; drawings, 11s.)