Mar. 5.] THE NEW ZEALAND GAZETTE. 819

a passage to the Bunsen-burner body and an independent passage to an ordinary gas-burner tip on said Bunsen burner, substantially as described and explained. (2.) In a gas-burner of the class set forth, the combination with the Bunsen burner, and in the stem thereof a two-way cock having a passage to such Bunsen burner and a side passage or by-path to telescopic pipe within the Bunsen burner and leading to a burner-tip, substantially as described and explained, and as illustrated in the drawings. (3.) The combination and arrangement of the mechanical parts for the purposes set forth, all together constituting a combination gas-burner, substantially as described and explained, and as illustrated in the drawings.

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

No. 22963.—10th June, 1907.—WILLIAM SAMUEL GARDNER, of Palmerston North, New Zealand, a retired Master of the Mercantile Marine, and Sheep-farmer. Hinged keel for boats, yachts, coasting-vessels, or ships of any size or description.*

Claims.—(1.) In ships’ hulls, the combination therewith of a flat keel hinged to the bottom of the hull, and adapted to extend vertically downward or to be turned up to lie against the hull’s surface, substantially as specified. (2.) In ships’ hulls, the combination therewith of a flat keel hinged to the bottom of the hull, and adapted to extend vertically downward or to be turned up to lie against the hull’s surface, and guys or stay-ropes secured to the hinged keel and extending upward into the hull on both sides thereof, substantially as and for the purposes specified.

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

No. 23122.—8th July, 1907.—GEORGE HARRINGTON MAC-EWAN, of Dunedin, New Zealand, Exporter. Improvements in agitating-apparatus for milk and the like.*

Claims.—(1.) The complete agitating-apparatus for milk and the like, substantially as described, or illustrated in the drawings. (2.) In agitating-apparatus for milk and the like, beaters consisting of transversely curved blades with an outward curve at the lower end, secured and operated substantially as and for the purposes set forth. (3.) In agitating-apparatus for milk and the like, beaters consisting of transversely curved perforated blades with an outward curve at the lower end, secured and operated substantially as and for the purposes set forth. (4.) In agitating-apparatus for milk and the like, beaters arranged in pairs, a pair mounted transversely alternating with a pair mounted longitudinally of the vat, substantially as and for the purposes set forth.

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

No. 23201.—25th July, 1907.—MELVIN BATCHLOR CHURCH, residing at Pythian Temple, Grand Rapids, Michigan, United States of America, Manufacturer. Improvement in and relating to power-transmission mechanism.

Claims.—(1.) In power-transmission apparatus in which a pair of power-transmission members are in power-transmitting connection with a third member, the use of equaliser or evener means connecting the pair of members whereby they have a compensating action in their connection with the third member, substantially as described. (2.) In connection with the evenor of claim 1, providing toothed gearing whereby each gear of the pair alternates with its companion in transmitting the power with the greater efficiency according as the teeth of said gears respectively assume the more efficient power-transmitting connection with the teeth of the third geared member, substantially as described. (3.) In connection with the features of claim 1, arranging the pair of power-transmitting members and the third member to engage at points substantially opposite in respect to the centre of rotation, substantially as described. (4.) In connection with the features of claim 1, arranging the equaliser as part of the power-transmission connection, preferably between the sections of the drive-shaft, as shown in Figs. 1, 2, and 3. (5.) In connection with the features of claim 1, arranging the equaliser independent of the power-transmission connections between the motor and the geared members, and preferably between annular power-transmission members, as the racks illustrated in Fig. 6. (6.) In connection with a power-transmission couple in which the encircling member meshes at substantially opposite points with power-transmission means, an evenor or equaliser to control the transmission at said opposite points, substantially as described. (7.) In connection with the features of claim 1, pivoting the eveners on a cross-pin supported in a sleeve connected with the armature. (8.) In a power-transmission couple, the geared connection from a central pinion to an encircling gear, consisting preferably of the planetary gears leading to substantially opposite points on the encircling member, and having a compensating or equalising action. (9.) In a power-transmission couple, an annular geared member, gears meshing therewith at substantially opposite points, each of said pair of gears alternating with its companion in transmitting the power with a greater efficiency according as the teeth of said gears respectively assume the more efficient power-transmitting connection with the teeth of the said geared member, substantially as described.

(Specification, 7s. ; drawing, 2s.)

No. 23218.—29th July, 1907.—ROBERT GEORGE CRICHTON, of Pursell Street, Foxton, New Zealand, Builder. An improved scaffolding-support.*

Claims.—(1.) For the purpose indicated, in combination, a tubular standard, a stem telescoping into and adjustable in relation to the standard, and a removable crutch fitting the stem and adapted to receive a plank, substantially as set forth. (2.) For the purpose indicated, in combination, a tubular standard, a stem telescoping into and adjustable in relation to the standard, removable means for supporting a plank upon the stem, and stay-rods upon the standard, substantially as set forth. (3.) For the purpose described, in combination, a tubular standard, a flange into which the standard is screwed and having holes for the passage of nails, a stem telescoping into the standard and having holes, a pin passing through the holes, a nut upon the end of the stem, a crutch having a leg fitting the stem, stay-rods at right angles to the standard and having eyes for the passage of nails, a clip clamped upon the top of the standard and to which the stay-rods are pivoted, substantially as set forth. (4.) The combination and arrangement of parts comprising the improvements in scaffold-supports, constructed, arranged, and operating substantially as and for the purposes set forth, and illustrated upon the drawing.

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

No. 23789.—4th December, 1907.—EDWIN HENSHALL, of Papanui, Christchurch, Canterbury, New Zealand, Builder. Improvements in friction hoists.

Claims.—(1.) In a hoist of the class described, the employment of a block rotatable in a bearing, and in which the drum shaft is mounted eccentrically, substantially as set forth. (2.) In a hoist of the class described, the employment, in combination with the means claimed in claim 1, of a rocking bearing in which the end of the shaft remote from the block is mounted, substantially as set forth. (3.) In a hoist of the class described, the employment of rubber-faced pulleys, substantially as set forth. (4.) The combination and arrangement of parts comprising the improvements in friction hoists, substantially as and for the purposes set forth, and illustrated in the drawing.

(Specification, 2s. 3d. ; drawing, 1s.)

No. 23859.—25th June, 1907.—STICKSTOFFWERKE G.m.b.H., of 3 Askanischer Platz, Berlin, Germany (the assignee of Dr. Albert Rudolph Frank, of 138 Kurfurstendamm, Halensee near Berlin, Germany, Engineer and Chemist, and Max Voigt, of 37 Lauterstrasse, Friedenau, near Berlin, Germany, Chemist). Process and device for manufacturing nitrogen compounds.

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

Claims.—(1.) Manufacture of nitrogen compounds from carbides by the action of nitrogen, characterized by only a part of the carbide which is to be treated being brought to the temperature necessary for the reaction, the remainder of the carbide being employed below the temperature of reaction. (2.) The process according to claim 1 executed by the nitrogen which is to be absorbed by the carbide being supplied to the carbide in a direction opposite to that in which the absorption reaction advances. (3.) A device for the manufacture of nitrogen compounds according to claims 1 and 2, characterized by the arrangement of one or more preferably vertical hollow spaces or chambers in which the