Feb. 5.] THE NEW ZEALAND GAZETTE. 395

pressure, independently of the movement of the triple-valve piston, for causing the triple valve to move into release position. (6.) In a fluid-pressure brake mechanism, the combination with a triple valve of a supplemental valve, a valve-device actuated by a variation of fluid pressure, independently of the movement of the triple-valve piston, for controlling by its operation the ultimate movement of the triple valve to release position, and a passage controlled both by said supplemental valve and by said valve-device. (7.) In a fluid-pressure brake mechanism, the combination with a triple valve of a recharging-passage for admitting pressure from train-pipe to reservoir while the triple valve is in the brake-setting position, and ports in the main valve and the graduating valve of the triple valve forming parts of said recharging-passage, whereby said passage is controlled both by the main valve and the graduating valve. (8.) In a fluid-pressure brake mechanism, the combination with a triple-valve device of a service-passage for admitting pressure from reservoir to brake cylinder, a recharging-passage for admitting pressure from train-pipe to reservoir while the triple valve is in the brake-setting position, and a single valve operated by the triple-valve piston for controlling both of said passages so that one shall be open while the other is closed, and vice versa.
(Specification, 18s.; drawings, 3s.)

No. 15899.—23rd January, 1903.—CLIFFORD WALMSLEY BARLEE SCOTT, of Pietermaritzburg, Natal, Solicitor. An improved wall distemper.

Claim.—An improved distemper for coating walls, ceilings, and the like, consisting of a clay and compound such as described, a colouring matter, and (if required) a disinfectant, proportioned and blended substantially as described.
(Specification, 1s. 6d.)

No. 15906.—27th January, 1903.—JAMES PALMER CAMPBELL, of Wellington, New Zealand, Solicitor (nominee of Peter Cooper Hewitt, of 11, Lexington Avenue, New York, United States of America, Scientist). Improvements in the method of and means for obtaining unidirectional current from a single-phase or polyphase alternating-current source.

Claims.—(1.) The method of obtaining a unidirectional current from a single-phase or polyphase alternating-current source by means of a device possessing a high negative electrode reluctance, which consists in annulling the negative electrode reluctance to the flow of current in one direction and maintaining a consequent condition of low reluctance at one electrode, and opposing the original high negative electrode reluctance to the flow of current in the other direction at the other electrode. (2.) For obtaining a unidirectional current from a polyphase alternating-current source, an arrangement having a negative electrode and a plurality of positive electrodes, each of the positive electrodes being connected to a separate lead from the source of polyphase currents, and the negative electrode being also connected to the said source of polyphase currents, substantially as described. (3.) The modification of the arrangement in which one of the positive electrodes is connected to the positive terminal of a source of direct current, the negative terminal of which is connected to the negative electrode, so that the device may be used with single-phase alternating current if desired. (4.) The various arrangements for obtaining unidirectional electric current from an alternating source, substantially as described.
(Specification, 7s. 6d.; drawings, 2s.)

No. 15907.—27th January, 1903.—AUGUSTINE WILLIAM SWIFT, of Oxford Terrace, Christchurch, New Zealand, Gentleman, and ROBERT HALL, of Cashel Street, Christchurch aforesaid, Hydropathist. An improved mould or die for plastic materials.

Claims.—(1.) A mould or die for plastic materials constructed, arranged, and operating as specified and illustrated. (2.) A mould or die for plastic material lined internally with glass and provided with means whereby lubricant is conveyed to the inner surface of said glass, being substantially as specified and illustrated. (3.) A mould or die for plastic materials comprising in combination an outer casing, a glass lining fixed therein, a flanged casing fitted around the broad end of the mould, a tube or pipe within the casing having perforations, and a pipe for supply of lubricant connected thereto, substantially as described and illustrated.
(Specification, 2s. 3d.; drawings, 1s.)

No. 15908.—27th January, 1903.—WILLIAM ERNEST HUGHES, of Queen’s Chambers, Wellington, New Zealand, Patent Agent (nominee of George Gibbs, care of Rapid Transit Subway Construction Company, of Park Row Building, New York, United States of America, Electrical Engineer). Improvements in signalling systems for electric railways.

Claims.—(1.) For railways operated electrically from a power station, a signalling system provided with means for preventing movement to the safety position of some or all of the signals of the track-section supplied by said power-station when the demand for electric power on said station equals or exceeds a predetermined amount. (2.) For controlling the operation of the signals of an electric-railway system in the manner described, an electrically actuated device operated by current flowing in a control circuit, said circuit being provided with a switching mechanism for opening and closing the same in accordance with the amount of current flowing in the power circuit. (3.) The application of the invention to electric railways worked on the block system by causing the operation of the block signals to be governed in accordance with the load on the power station, irrespective of the positions of trains or vehicles on the various block-sections, substantially as described, and for the purpose specified. (4.) The modification of the invention in which the device for preventing the movement of the signal to its safety position also acts to return the signal to its danger position if it is not already in that position. (5.) For railways operated electrically from a power station, signalling systems provided with means for controlling the operation of the signals in accordance with the demand for power on the station, constructed and operating substantially as described with reference to the drawings.
(Specification, 14s. 6d.; drawings, 3s.)

No. 15909.—27th January, 1903.—ARTHUR BERNARD GILL, of Carlton, Blackheath Park, London, England, Electrical Engineer. Improvements in apparatus for electrically lighting railway-trains.

Claims.—(1.) The improved manner of attaching to the carriage the dynamo A driven by strap from a wheel-axle F consisting in supporting it in a substantially vertical position from a horizontal bar B (Figs. 1 to 5), along which bar it can slide against the effort of a spring or weight D, or supporting it from a slanting bar B (Figs. 6, 7, and 8), along which bar it can slide against the effort of gravity, or supporting it by weights D in cords D¹ passing over pulleys D² (Figs. 9 and 10), so that in all cases movement of the dynamo in any direction, except in a plane at right angles to the axle, is prevented, and for the purpose of adapting the dynamo to be applied in a more secure and efficient manner, and for the purpose of being able to use larger dynamos. (2.) The improved means of reversing the direction of rotation of the dynamo characterized by that the rocking-arm M is entirely supported on an extension N¹ of the bearing N, and is partially rotated by friction between blocks O on spring plungers P working in guides Q and a groove formed by the flanges M¹ or M² on the boss of the rocking-arm M (Fig. 11), or by friction between blocks O on extensions V¹ of the governor arms V, and a rim Mˣ on the rocking-arm (Figs. 12 and 13), while the axial movement of the rocking-arm M is effected by the centrifugal action of the governor as described for the purpose of reducing the friction, lessening lubrication, and counteracting the effect of the parts wearing out of truth.
(Specification, 6s.; drawings, 3s.)

No. 15914.—28th January, 1903.—ALFRED HANKINSON, of 78, Pitt Street, Sydney, New South Wales, Importer. Improvements in miners’ safety-lamps.

Claims.—(1.) The combination of a miner’s safety-lamp of ordinary well-known construction with a burner having a wick tube in which there is one or more apertures through which the wick is engaged by a sharp-toothed wheel or wheels, said wheel or wheels being carried by a cross-shaft supported by suitable bearings and revolved by a worm-and-wheel gearing, which is operated by means of a button or other suitable appliance on the outside of the lamp, and a cap adapted to cover the mechanism and retain the said burner in position, substantially as and for the purpose described, and as illustrated in the drawings. (2.) In miners’ safety-lamps, a burner having a wick-tube in which there is one or more apertures through which the wick is engaged by a sharp-toothed wheel or wheels, said wheel or wheels being carried by a cross-shaft supported by suitable bearings and revolved by a worm-and-wheel gearing, which is operated by means of a button or other suitable appliance on the outside of the lamp, and a cap adapted to cover the mechanism and retain the said burner in position, substantially as described, and as illustrated in the drawings.
(Specification, 3s.; drawings, 1s.)