1012
THE NEW ZEALAND GAZETTE.
[No. 29

head of a spiral channel therein and circumferential spiral grooves formed within the cylinder-casting for the circulation of a cooling medium, permitting the use of a thin liner between the cooling medium and the heated gas, the said head having fixed to its lower face a plunger on which slides a barrel secured in a trunk piston, substantially as described and explained, and illustrated in the drawings. (4.) In apparatus for elastic-fluid compression, the combination with a cylinder-head of a conical lower face provided therein with a spiral channel, a composite trunk piston dished to correspond therewith, the upper edge of piston-body constituting, with a lip on the piston-sleeve, the intake-valve, and a cylinder barrel having grooves therein forming a spiral passage for the circulation of a cooling medium, substantially as described and explained, and illustrated in the drawings. (5.) In apparatus for elastic-fluid compression, the combination with a cylinder-head of a composite trunk piston, the body of said piston being approximately free on the wrist-pins so as to take a full seat against a lip on the piston-sleeve and avoid rigidity of thrust, substantially as described and explained, and as illustrated in the drawings.
(Specification, 5s. 6d.; drawings, 3s.)

No. 16194.—4th April, 1903.—JOHN BICKMRS BLAIR, of Station Road, Indooroopilly, Queensland, Accountant. Means for turning or swinging a ship when not under way by power of main engines; applicable also as auxiliary or emergency steering-gear.

Claims.—(1.) A trunk, placed at or near the extreme ends of a ship so that the water from either side can flow directly through said trunk, having two nozzles placed centrally within and arranged to discharge on either side, said nozzles being connected to suitable steam-supply and provided with valves controllable from the bridge, as described and illustrated. (2.) The combination of a trunk, having communication with both sides of a ship, and one or more nozzles, as described.
(Specification, 3s.; drawings, 1s.)

No. 16197.—6th April, 1903.—RICHARD RUSSELL DONALDSON, of Rattray Street, Dunedin, New Zealand, Sanitary Inspector. Improvements in and relating to ventilation of sewers.

Claims.—(1.) The improved means for ventilating sewers, consisting of the parts arranged, combined, and operating substantially as specified and illustrated. (2.) For the purpose indicated, in combination, a sewer having a door hinged within its upper portion, an opening for escape of gases in front of the door, and means for conducting away the gases passing through the opening, substantially as indicated. (3.) For the purpose indicated, in combination, a sewer having a door hinged within its upper portion, an opening for escape of gases in front of the said door, a dome covering the opening, and a pipe conducting gases from the dome, substantially as specified and illustrated.
(Specification, 2s.; drawings, 1s.)

An asterisk (*) denotes the complete specification of an invention for which a provisional specification has been already lodged.
NOTE.—The cost of copying the specification and drawings has been inserted after the notice of each application. An order for a copy or copies should be accompanied by a post-office order or postal note for the cost of copying.
The date of acceptance of each application is given after the number.
Extracts from the drawings accompanying the foregoing complete specifications appear at the end of this Gazette.
F. WALDEGRAVE,
Registrar.

Provisional Specifications.

Patent Office,
Wellington, 15th April, 1903.

APPLICATIONS for Letters Patent, with provisional specifications, have been accepted as under:—
No. 16121.—23rd March, 1903.—GEORGE HOLROAN, of Mount Roskill Road, Auckland, New Zealand, Master Mariner. Improvements in tins or cans to facilitate their opening with wire.
No. 16127.—21st March, 1903.—JOSEPH GEORGE BARLETT, of Main Road, Caversham, New Zealand, Bootmaker. Improvements in rockers.
No. 16135.—25th March, 1903.—JOHN MEDE MORONY, of Mudgee, New South Wales, Storekeeper. A device for preventing horses or other animals attached to road-vehicles from starting or bolting.

No. 16136.—24th March, 1903.—ALLAN TANGLEY HEIGH-TON, of 291, St. Asaph Street West, Christchurch, New Zealand, Salesman. An improvement in boot-heels.
No. 16137.—26th March, 1903.—BYRON ELHRED, of 67, Milk Street, Boston, Suffolk, Massachusetts, United States of America, Mechanical Engineer. Process for treating lime.
No. 16139.—26th March, 1903.—PHILIP MAGNUS, of 52, Harmsworth Street, Collingwood, Victoria, Collector. An improved leather and process of treating the same.
No. 16144.—24th March, 1903.—EDWARD DE NOILLES DE LOUTRE, of Port Moeraki, Otago, New Zealand, Gold-digger. Improved apparatus for treating auriferous material in the beds of rivers and the like for the extraction of gold therefrom.
No. 16145.—23rd March, 1903.—THOMAS JAMES DAVYS, Ironfounder, and WILLIAM JOHNSON WALLACE, Pattern-maker, both of Dunedin, New Zealand. Improvements in tumblers for dredge-buckets and the like.
No. 16146.—25th March, 1903.—WALTER DAVID WILSON, of Albert Street, Auckland, New Zealand, Blacksmith. An improved swingle-tree iron.
No. 16147.—27th March, 1903.—JOHN COOP, of Kaituna, Canterbury, New Zealand, Farmer. An improved grubber.
No. 16149.—25th March, 1903.—GEORGE BEAUMONT, of Kaikorai Valley Road, Roslyn, Dunedin, New Zealand, Loom-tuner. Device for locking nuts.
No. 16150.—28th March, 1903.—FREDERICK WILLIAM TAYLOR, of Wanganui, Wellington, New Zealand, Bottler. The separation of iron from sand by means of magnetism and electricity in all forms.
No. 16154.—30th March, 1903.—WILLIAM WILKINSON, of Main Road, Roslyn, New Zealand, Engineer. Improved locking-device for the nuts of fish-plate bolts and other like purposes.
No. 16155.—31st March, 1903.—DUGALD MATHESON, of Wellington, New Zealand, Teacher. Improved means for preventing horses attached to vehicles from bolting.
No. 16156.—31st March, 1903.—MORTON COOKE COSSAR, of Ponsonby, Auckland, New Zealand, Commercial Traveller. A slicer for cucumbers and the like.
No. 16157.—28th March, 1903.—WILLIAM SIM, of Underwood, Invercargill, New Zealand, Engineer. Improvements in milking-machines.
No. 16158.—28th March, 1903.—JOSEPH HENRY NOONAN, of Hobson Street, Auckland, New Zealand, Dealer, and TIMOTHY BEHANE O’CONNOR, of Victoria Street, Auckland aforesaid, Publican. An improved billiard-rest.
No. 16160.—1st April, 1903.—WILLIAM BRADY, of Papamoa, Te Puke, Auckland, New Zealand, Blacksmith. An improved horse-shoe.
No. 16162.—1st April, 1903.—GEORGE CRESSWELL PALMER, of Wellington, New Zealand, Saddler. An improved cartridge-holder and means for carrying the same.
No. 16163.—1st April, 1903.—WILLIAM HENRY BENTHAM, of Te Araroa, Waipu, New Zealand, Flax-miller. An improved machine for dressing flax.
No. 16165.—30th March, 1903.—LAMBTON LE BRETON MOUNT, of “Ivanhoe,” Grafton Road, Auckland, New Zealand. Improvements in the make of working-men’s trousers or overalls.
No. 16170.—2nd April, 1903.—EWEN MACKENZIE MCLAUCHLAN, of Springhills, Southland, New Zealand, Farmer. An improved buckle.
No. 16171.—2nd April, 1903.—EWEN MACKENZIE MCLAUCHLAN, of Springhills, Southland, New Zealand, Farmer. An improved wire staple for use in book-binding.
No. 16172.—2nd April, 1903.—EWEN MACKENZIE MCLAUCHLAN, of Springhills, Southland, New Zealand, Farmer. An improved rivet.
No. 16175.—31st March, 1903.—GEORGE BEAUMONT, of Kaikorai Valley Road, Roslyn, Dunedin, New Zealand, Loom-tuner. Improved device for locking nuts.
No. 16176.—31st March, 1903.—WALTER JOHN DUNSTAN, of St. Kilda, Dunedin, New Zealand, Plasterer. Signalling-apparatus for cable tramways.
No. 16177.—1st April, 1903.—ROBERT ERNEST TAYLOR, of Christchurch, New Zealand, Contractor. An improved earth-scoop.
No. 16181.—31st March, 1903.—JANE CAMPBELL CORBETT, of Birdgrove Estate, Manukau Road, Epsom, Auckland, New Zealand. A spinning-top.
No. 16182.—1st April, 1903.—RICHARD WILLIAMS, of East Taieri, New Zealand, Gardener. Improvements in brands for carcases and the like.
No. 16183.—4th April, 1903.—MARRIANNE EWING MCLEOD, of Barkly Street, Sale, Tanjil, Victoria, Dressmaker. Improvements in charts to be used in the cutting of patterns for ladies’ and children’s garments.
No. 16184.—4th April, 1903.—CHARLES HARRISON WARD, of 103, Union Street, Windsor, Bourke, Victoria, Metallurgist. An improved process of manufacturing pigments suitable for use as a paint.