JULY 12.] THE NEW ZEALAND GAZETTE.

transformer in which the primary is constituted by two windings (43, 44) separately connected by one of their extremities to two distinct aerials and by their other two extremities one with the other, said windings being so arranged as to produce, when two electric oscillations having the same amplitude and phase flow through them, a magnetic flux nil through the secondary inserted in the circuit comprising the revealer apparatus of the waves, said receiving apparatus being further characterized by aerial conductors of the type described in my prior patent and disposed in a vertical plane forming with the plane of the aerial conductors of the transmitting-station an angle corresponding to the ratio of the axes of the elliptical polarisation. (2.) In a transformer as specified in claim 1, two primary windings and a secondary wound on three distinct bobbins having the same axis and all of them movable in both directions along said common axis, the two primary windings (43, 44) being wound in the same direction, two opposite terminals of said primaries being connected together, while the two other opposite terminals are connected together, while the two other opposite terminals are connected to the extremities (a, b) of the aerial conductors. (3.) In a transformer as specified in claim 1, two primary windings (43, 44) wound in the same direction and on the same bobbin as the secondary (40), two opposite terminals of said primaries are connected together, while the two other opposite terminals are connected to the extremities (a, b) of the aerial conductors. (4.) In a receiving apparatus as described in claim 1, the use of two transformers (90, 91) the primaries of which are by one of their terminals connected together, their other two terminals being respectively connected to the extremities (a, b) of the aerial conductors, the secondaries of said transformers being in series respectively with each of the two primary circuits (44, 43) of the transformer specified under claims 1 to 3, and with two capacities (92, 93) inserted in the two oircuits so formed. (5.) In a receiver as claimed in claim 1, the use of two variable ohmic resistances (112, 113) in derivation with each of the primaries (43, 44) of the transformer as specified under claims 1 to 4, and two variable capacities (110, 111) in derivation on the so-formed circuits, two points of which (114, 115) are connected respectively to the extremities (a, b) of the aerial conductors while the other points (116, 117) are connected one to the other.

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

No. 21185.-23rd May, 1906.-The Honourable CHARLES ALGERNON PARSONS, of Heaton Works, Newcastle-on-Tyne, Northumberland, England, Engineer. Improvements relating to dynamo electric machinery.

Claims.-(1.) In electrical appliances, the use of good heat-conducting material interposed between the conductors for the purpose of conducting the heat generated in such conductors to the outside or inside, or both, as and for the purpose described. (2.) In electrical appliances, the use of a lapping of wires, sheet metal, gauze, or the like of high thermal conductivity so placed with reference to the conductors of the part to be cooled as to conduct the heat from said conductors rapidly in a radial direction to the internal or external parts, or both, the sectional area of such lapping being small relatively to the cross-section of the conductors, substantially as described. (3.) The improved armatures for dynamo-electric generators and motors provided with cooling-devices, substantially as described with reference to the drawings. (4.) A tape having strips of metal of high thermal conductivity woven therein so as to form a good heat-conducting path longitudinally, substantially as and for the purposes described. (5.) A tape having strips of metal of high thermal conductivity woven therein, the metal being discontinuous longitudinally while the fabric of the tape is continuous, substantially as and for the purposes described. (6.) A tape having strips of metal of high thermal conductivity woven therein, said strips being of greater width than depth and being woven with their greater width in the plane of the tape, as and for the purposes described. (7.) The tapes having metal of high thermal conductivity woven therein, as and for the purposes described.

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

No. 21197.-25th May, 1906.-ALFRED JAMES, of 2 Broad Street Place, London, England, Mining and Metallurgical Engineer. An improved process for extracting gold from auriferous arsenical and (or) antimonial ores.

Claim.-In the process referred to, the combination of a chloridizing roast with a reducing roast, together with subsequent treatment, with or without hydrochloric acid, by chlorination or cyanidation, or both, substantially as described.

(Specification, 1s. 6d.)

No. 21203.-25th May, 1906.-GEORGE DAVIDSON, of Bealey Street, Hokitika, Westland, New Zealand, Engineer. Improvements in pitch-chains and sprockets therefor.

Claim.-In the sprocket-chain described, the employment of pins having a middle portion of one diameter, shouldered portions of reduced diameter at each end thereof, and portions of less diameter one at each end of the pin, substantially as specified and illustrated.

(Specification, ls. 6d.; drawing, ls.)

No. 21218.-25th May, 1906.-CATHERINE JANE McMASTER, of Corfield, North Queensland, Queensland, Australia, Grazing Farmer. An improved wheel.

Claim.-An improved wheel characterized by a pair of sliding hubs to which the spokes are attached, and means for drawing the said hubs together or forcing them apart for the purpose of forming a rigid wheel, substantially as described and illustrated in the drawings.

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

No. 21221.-26th May, 1906.-WILLIAM McCORD JAMIESON, of Te Papa, near Onehunga, Auckland, New Zealand, Engineer. A pneumatic-tire protector.

Extract from Specification.-This invention is projected to protect the pneumatic tires of motors, bicycles, and other vehicles from being punctured or otherwise destroyed. This purpose is attained by a box formation being fitted to and around the tire with corrugations inside the box which are in immediate touch with the tire and receive its impact.

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

(Specification, 3s. 3d.; drawing, ls.)

No. 21222.-29th May, 1906.-WILLIAM REID, of East Malvern, Victoria, Australia, Electrical Officer. Improvements in railway signalling-mechanism and the like.

Claims.-(1.) In signalling-mechanism, in combination, the parts comprising the controller device described with reference to Figs. 1 to 3. (2.) In signalling-mechanism, in combination, the parts comprising the rod, link, and lever connection between the lead and the signal arm, substantially as described. (3.) In signalling-mechanism, in combination, the link p and one (q) or more (q, l) levers intermediate between down-rods k and s, substantially as described. (4.) In signalling-mechanism, the means set forth (inclusive of a stop as o and pivoted lever l) for relieving down-rod strain, substantially as described. (5.) In signalling-mechanism, in combination, the lever q, rod s, and pivots r, rl, and rz. (6.) In signalling-mechanism, the combination of parts illustrated in Fig. 7. (7.) In signalling-mechanism, a lever, means to actuate it from below, connections adapted to put weight on it from above, a roller on the lever, and a slotted guide-plate or the like, as described. (8.) In combination with the matter of the last preceding claim, a cam lever as described. (9.) In signalling-mechanism, a pivoted cam lever and means to lock or unlock it whereby to lock or release a lever q or the like. (10.) In signalling-mechanism, the combination of the parts p to w to operate as indicated. (11.) In signalling-mechanism, a controlling cam lever, escapement-arm, and removable stop for the latter, in combination as described. (12.) In connection with the last preceding claim, means to apply or remove the stop as described with reference to Figs. 1 to 3. (13.) In connection with the last preceding claim but one, means to apply or remove the stop, as described with reference to Figs. 4 to 6. (14.) In signalling-mechanism, an adjustable plate attached to the armature of an electromagnet and having adjustable stops as described. (15.) In signalling-mechanism, in combination, the described parts A to D, a suitable stop or stops, an arm or lever to be stopped or released, suitable connections to the signal-arm, and means to energize the coils, substantially as described. (16.) In signalling-mechanism, the combination with the parts indicated by Fig. 5 of the means for producing that position, substantially as described. (17.) In signalling-mechanism, the combination with the parts indicated by Fig. 4 of the means for producing that position, substantially as described. (18.) In signalling-mechanism, the combination with the parts indicated by Fig. 2 of the means for producing that position, substantially as described. (19.) In signalling-mechanism, the combination with the parts indicated by Fig. 3 of the

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