Feb. 20.] THE NEW ZEALAND GAZETTE. 677

improved construction of bird-trap, substantially as described and explained, as illustrated in the drawings, and for the several purposes set forth.

(Specification, 4s. 6d.; drawing, 2s.)

No. 23443.—6th September, 1907.—JOHN LINDSAY, Carpenter, and ROBERT LINDSAY, Engine-driver, both of Dunedin, New Zealand. An improved reversible and collapsible trolley-pole for electric vehicles.

Extract from Specification.—The object of this invention is to produce a trolley-pole for conveying the electricity from an electric cable to a moving vehicle, so that it can be reversed without breaking contact with the cable, and also one that can automatically collapse if the trolley-wheel gets off the said electric cable, instead of being dangerous as now. The said pole is capable of being reversed from more than one place in a car. For this purpose the pole is either formed of two lengths and sizes of tubes, one to slide within the other, and normally kept extended by a spring in tension, or else the pole is formed of two lengths pivoted and capable of being partly folded either way, while reversing, but which are normally kept towards a straight line by a spiral spring in tension. In either case the reversing is done by pulling the pole longitudinally over to the other position by a cord without breaking electrical contact with the cable. An attachment can be added which allows the upper length of the pole to collapse should the trolley-wheel leave the cable.

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

(Specification, 4s. 6d.; drawing, 1s.)

No. 23686.—18th December, 1906.—SHERARD OSBORN COWPER-COLES, of Grosvenor Mansions, 82 Victoria Street, Westminster, London, England, Electro-Metallurgist. Improvements in the electro-deposition of iron.

[NOTE.—This is an application under section 106 of the Act, the date given being the official date of the application in Great Britain.]

Claims.—(1.) In the electro-deposition of iron from crude iron or from iron-ore, the process wherein the electrolyte is maintained charged with iron-oxide, substantially as described. (2.) In the electro-deposition of iron from crude iron or iron-ore, the process wherein the electrolyte is charged with iron-oxide maintained in suspension therein by stirrers or equivalent means, substantially as described. (3.) In the electro-deposition of iron from crude iron or from iron-ore, the process wherein a solution containing the iron leached out of the ore is caused to circulate through a tank containing insoluble anodes arranged around a mandrel forming the cathode, substantially as described. (4.) In the electro-deposition of iron from the ore, the process consisting in mixing the roasted ore with coke so as to form a filter-bed through which an iron-oxide solvent is caused to pass, the solution, after its passage through the filter-bed, being caused to circulate through a tank containing insoluble anodes arranged around a revolving cathode, substantially as described. (5.) In a process of the kind described in the preceding claiming clause, the method wherein an electric current is passed through the ore to assist the dissolution of the same, substantially as described.

(Specification, 4s. 6d.)

No. 23706.—15th November, 1906.—EDGAR HARRY LAWTON, of 103 King’s Road, Brighton, Sussex, England, Gentleman. An improved advertising-device.

[NOTE.—This is an application under section 106 of the Act, the date given being the official date of the application in Great Britain.]

Claims.—(1.) An advertising-device comprising an envelope containing advertising matter, having a stamp-bearing portion adapted to be disposed outside a corresponding portion of the envelope, substantially as described. (2.) An advertising-device comprising an envelope containing advertising matter, having a stamp-bearing portion interlacing with a corresponding portion of the envelope, substantially as described. (3.) An advertising-device comprising an envelope having slots, slits, apertures, or the like formed in a wall of the envelope, and separated by an intermediate portion of this wall, in front of which the stamp-bearing portion of the advertising matter is disposed, substantially as described.

(4.) Improved advertising-devices, substantially as described with reference to the drawings. (5.) An envelope, or enclosure for the same, having one or more slots, slits, or the like, substantially as and for the purpose described.

(Specification, 4s. 9d.; drawing, 2s.)

No. 23724.—13th November, 1907.—CHARLES ROSEGGER, of Auckland, New Zealand, Civil Engineer. An improved wall-construction for all kinds of buildings, consisting of wide unfastened metal network built in with slabs of concrete, or stone, or brick, or the like, laid in Portland cement, mortar, or other suitable grouting.

Claims.—(1.) The improved wall-construction for all kinds of buildings, consisting of wide unfastened metal network built in with slabs of concrete or stone or brick laid in Portland cement or mortar grouting, consisting of a network formed of unfastened metal rods or wires, said network being shaped and filled with any or either or all of the shapes of concrete blocks, stone blocks, or brickwork specified, said blocks being bonded with grouting of Portland cement or mortar together with the network, for the purpose and in the manner set forth, as described and illustrated. (2.) The application, arrangement, and combination of the parts specified, in the manner and for the purpose set forth, as described and illustrated.

(Specification, 3s. 6d.; drawing, 1s.)

No. 23730.—14th November, 1907.—PERCY STUART IRWIN, of Waikaka, New Zealand, Inventor. An automatic balanced door or window.

Claims.—(1.) In balanced doors or windows, in combination, an ordinary door pivoted at about the usual place, with an adjustable balance-weight for the purpose of making said door indifferent to the movement of the place in which it is used, all substantially as shown in the drawing, and as described and as explained. (2.) In balanced doors or windows, a door or window pivoted in its centre so as to revolve in a horizontal plane and be indifferent either to the movement of the place in which it is used or to wind, all substantially as set forth. (3.) In balanced doors or windows, these pivoted slightly off the centre, but to partly revolve in a horizontal plane so as to be indifferent to the movement of the place in which it is used, all substantially as set forth. (4.) In doors, two doors hung together at about the usual place, both being capable of revolving together in a horizontal plane, or of being quickly separated, so as to move independently when needed, all substantially as set forth, and as shown on the drawing.

(Specification, 2s. 9d.; drawing, 1s.)

No. 23783.—5th August, 1907.—HENRY CLEMENT NEWTON, of “Kenilworth,” Barry Street, Kew, near Melbourne, Victoria, Australia, Engineer, and ANTHONY GEORGE MALDON MICHELL, of No. 413 Collins Street, Melbourne aforesaid, Engineer. Apparatus for use in connection with check cipher-systems.

[NOTE.—This is an application under section 106 of the Act, the date given being the official date of the application in the Commonwealth of Australia.]

Claims.—(1.) An apparatus for use in connection with check cipher-systems, which comprises a series of movable elements all similarly formed and similarly operated, and bearing charts of the symbols of which the message is composed, means for moving the elements by amounts depending on numerical values associated with the symbols, and means for summing the movements of the elements, and displaying various selections of the symbols upon the charts according to the value of the sum as obtained. (2.) In an apparatus for use in connection with check cipher-systems, a series of movable elements all similarly formed and similarly operated, and bearing similar charts of two mutually convertible systems of symbols; means for displaying in fixed positions a sequence of symbols of one of the systems, selected one from each chart, by movement of the chart-bearing elements from their zero positions by suitable amounts; means for simultaneously displaying the corresponding sequence of symbols of the other system in corresponding fixed positions, and an integrating element gearing with each of the chart-bearing elements in succession, and adapted to sum the amounts of their movements, for the purpose set forth. (3.) In an apparatus for use in connection with check cipher-systems, a series of rollers bearing charts of two mutually equivalent systems of symbols, means for simultaneously displaying a pair of equivalent symbols upon each roller, and means for rotating the rollers