Feb. 7.] THE NEW ZEALAND GAZETTE. 531

and then, with or without a subsequent similar treatment with water, discharging said caked material from the filter by fluid-pressure behind same, substantially as described. (2.) The improvement in the process of filtering slimes which consists in discharging the caked material from the filter by first saturating the fibrous medium with moisture and then applying an air-pressure behind the filtering-surface, substantially as described. (3.) The improvement in the process of filtering slimes which consists in regenerating the filtering media by subjecting the filter-leaves to the action of dilute hydrochloric acid, substantially as and for the purposes set forth. (4.) Apparatus for filtering slimes consisting of a fibrous medium enclosed within filtering-cloths sewn together through the said fibrous medium and carried in a suitable frame, substantially as described. (5.) Apparatus for filtering slimes consisting of filtering media carried by a stationary frame perforated at points within the filtering media and flexibly connected to a vacuum pump, substantially as described. (6.) Apparatus for filtering slimes consisting in so forming the top rail of the filter-frame that the liquid dropping therefrom when the vat is emptying will fall clear of the soft caked material carried by filtering media, substantially as described. (7.) The improved construction and arrangement of apparatus for filtering slimes, substantially as described, and as illustrated in the drawings.

(Specification, 9s. 6d.; drawing, 2s.)

No. 22251.—27th December, 1906.—THOMAS STRONG HUMBLE, of Vulcan Foundry, Little Malop Street, Geelong, Victoria, Australia, Engineer and Ironfounder (assignee of Thomas Strong Humble aforesaid, and Ernest Schultz, of Vulcan Foundry aforesaid, Engineer). Improvements in and relating to the combustion-chambers of internal-combustion engines.

Extract from Specification.—One of the main improvements in connection with this invention is the introduction of a predetermined comparatively minute quantity of water into the centre of the ordinary charge, by means of which the total pressure of combustion is increased, and consequently the efficiency of the engine is raised. This addition to the charge causes a more complete combustion and a consequent diminution of solid residue, and thus avoids the necessity of “scavenging,” and consequent loss of energy and time. Furthermore, the ignition-tube is so constructed and arranged that once ignition is started and the engine begins to work, ignition of the subsequent charges will continue automatically without the necessity of extraneous heat, and also the timing of the explosion or complete ignition of the charges which have been thoroughly mixed, and in the case of liquid fuel vaporised, may be simply and accurately adjusted. The inlet valve is also so arranged that at the beginning of the intake an adjustable amount of air only is admitted, and then at the required moment the charge proper enters.

[NOTE.—The above extract from the specification is inserted in place of the claims.]

(Specification, 7s. 3d.; drawing, 1s.)

No. 22252.—27th December, 1906.—JOHN WILLIAM MANLEY, of Segary Villa, Hadley Road, New Barnet, England, Electrical Engineer, and the ELECTRIC SAFETY APPLIANCES COMPANY, LIMITED, of Eldon Street House, Eldon Street, London, England, Manufacturers. A new or improved method of winding the coils of electric measuring or indicating apparatus, and the application thereof to instruments for detecting and obviating leakage from conductors of electricity.

Claims.—(1.) In an electrical measuring or indicating apparatus, the method of winding the coils, substantially as and for the purpose set forth. (2.) In an instrument for detecting and obviating leakage from conductors of electricity, causing the excess of current in one conductor over that in another to deflect a magnet, and causing the deflection of that magnet to close a circuit through an electric bell or other indicating-device, whereby a warning is given. (3.) In an instrument for detecting and obviating leakage from conductors of electricity, causing the excess of current in one conductor over that in another to deflect a magnet, and causing the deflection of that magnet to close a circuit through a cut-out whereby the main circuit may be opened. (4.) The new or improved instrument, substantially as set forth with reference to Fig. 1, and either with or without the accessories set forth with reference to Figs. 2 and 3.

(Specification, 8s.; drawing, 2s.)

No. 22254.—28th December, 1906.—WILLIAM PLATT, of Highbank, near Rakaia, Canterbury, New Zealand, Farm Labourer. An attachment to the blade of a knife for the purpose of facilitating potato and vegetable peeling.

Claim.—An attachment to the blade of a knife for the purpose indicated, such attachment consisting of a length of wire twisted at its ends into spirals, between which the blade of the knife is adapted to be passed so as to be gripped thereby, and to hold the length of wire in a position parallel with the edge of the knife, substantially as specified.

(Specification, 2s.; drawing, 1s.)

No. 22262.—2nd January, 1907.—JAMES THOMAS HUNTER, of Queen’s Chambers, Wellington, New Zealand, Patent Agent (nominee of the Edison Ore-milling Syndicate, Limited, of Fitzalan House, Arundel Street, Strand, London, England—the assignees of William Simpkin, of Fitzalan House aforesaid, and James Bain Ballantine, of “Glenthorne,” St. Margaret’s Road, St. Margaret’s, Twickenham, Middlesex, England). Improved magnetic separator.

Claims.—(1.) A magnetic separator having a rotating drum made of non-magnetic material, one pole of the magnet being arranged outside said drum, and one pole being arranged inside said drum. (2.) A magnetic separator, as claimed in claim 1, in which the poles of the magnets gradually decrease in cross-section towards their separating edges. (3.) A magnetic separator, as claimed in claim 1, in which the pole-pieces are formed with curved inner and outer surfaces, the underside of the outside pole-piece being concentric with and of a little longer radius than the outer surface of the drum, and the outer side of the inner pole-piece being concentric with and of a little shorter radius than the inside of the drum. (4.) The improved magnetic separator substantially as shown and described.

(Specification, 4s.; drawing, 1s.)

No. 22266.—3rd January, 1907.—SYDNEY ASTON MERSEY ROSE, of 637–641 Church Street, Richmond, Melbourne, Victoria, Electrical Engineer, and HERBERT BYNG CROWLE, of 115 Argyle Street, St. Kilda, Melbourne aforesaid, Traveller. Improvements relating to automatic electrical targets for rifle practice.

Claims.—(1.) In apparatus for use in connection with electrical targets for rifle practice, a series of various resistances adapted to be placed in the main-line circuit, in combination with a solenoid actuating a contact arranged to complete a local circuit through an indicator, substantially as and for the purposes specified, and as illustrated in drawings. (2.) In apparatus for use in connection with automatic electrical targets for rifle practice, a contact rack or bar having contact pieces (as j) at intervals, together with raised inclined surfaces or projections between them, substantially as and for the purposes specified, and as illustrated in the drawings. (3.) In apparatus for use in connection with automatic electrical targets for rifle practice, a contact rack or bar having raised inclined surfaces or projections between the contacts, in combination with a contact-making lever or arm actuated by a solenoid, substantially as and for the purposes specified, and as illustrated in the drawings. (4.) In apparatus for use in connection with automatic electrical targets for rifle practice, an auxiliary contact lever (as i1) mounted upon the outer end of a radial contact-making arm or lever (as i), substantially as and for the purposes specified, and as illustrated in the drawings. (5.) In apparatus for use in connection with automatic electrical targets for rifle practice, an auxiliary contact-making lever or arm (as i1) provided with a pawl engaging with a ratchet wheel, in combination with a rotary fan (as i4), substantially as and for the purposes specified, and as illustrated in the drawings. (6.) In apparatus for use in connection with automatic electrical targets for rifle practice, a trip-lever contact having an upwardly projecting weighted arm in combination with a resetting-magnet in electrical communication with contacts in an indicator, the circuit through the resetting-magnet being completed by the fall of either of the shutters in said indicator, substantially as and for the purposes specified, and as illustrated in the drawings.

(Specification, 8s.; drawing, 1s.)