Jan. 10.] THE NEW ZEALAND GAZETTE. 131

No. 21887.—4th October, 1906.—ROBERT MILLAR, of Dunedin, New Zealand, Inventor. Improved spraying-machine.

Claims.—(1.) In spraying-machinery, carried on wheeled vehicles and worked by a wheel thereof, in combination, a tank having a strainer, a force-pump driven by said wheel of vehicle, a pressure-cylinder in which the force can be maintained equally to the last by weights acting on a plunger, said cylinder collecting and passing evenly the pumped stream of spraying fluid, with a receptacle for maintaining traction by loading it with weights as the liquid diminishes, all substantially as set forth in the drawing and as explained and described. (2.) In spraying-machinery, in combination a pump driven by one of the wheels of the vehicle it is carried on, with a pressure-cylinder that can have the force kept up to the end of its stroke, guards to prevent destruction of plants by the wheels unnecessarily passing over them, and weights to preserve the traction for pump-driving, all substantially as set forth.

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

No. 21916.—13th October, 1906.—HARRY BOSTOCK AND JOHN ANGELL PECK, both of Aaron’s Exchange Hotel, Gresham Street, Sydney, New South Wales, Australia, Boot and Shoe Manufacturers (assignees of Henry James Swain, of Sydenham Road, Sydenham, Sydney, aforesaid, Carpenter). An improved lock-nut.

Claims.—(1.) A lock-nut, consisting of a saucer-shaped washer, having radial ribs upon its convex side and corresponding grooves upon its concave side, in combination with corresponding radial grooves in the underside of the nut, or of the head, such grooves being adapted to receive the radial ribs on the washer, as specified. (2.) A lock-nut, consisting of a nut having radial grooves on its under-side, a saucer-shaped washer having radial ribs upon its convex side, corresponding grooves upon its concave side, and a helical spring washer with a terminal tooth or cog adapted to enter any one of the grooves in the concave side of the saucer-washer, as set forth.

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

No. 21947.—20th October, 1906.—THOMAS HARRY GILLMAN, of Hawera, Taranaki, New Zealand, Architect. Improvements in jointing timber.

Claim.—The jointing of timbers with joint as described, comprising in combination tongues A and D, throats or grooves E and F, space G, rounded corners H, and optional splay or square joint J, as may be desired.

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

No. 22055.—14th November, 1906.—JOHN ISAAC MOSS, of 196 Vere Street, Abbotsford, Melbourne, Victoria, Australia, Agent. Improved self-locking window-fastener.

Claims.—(1.) In an improved self-locking window-fastener, an outer casing or frame such as A having secured therein by means of a pin an eccentrically pivoted dog or catch, with a thumb or finger plate at the rear end thereof, said thumb or finger plate having flanges to rest upon said outer casing to keep the lock in operative position, as described and illustrated, and for the purposes set forth. (2.) In an improved self-locking window-fastener the combination and arrangement of the several parts described and illustrated for the purpose set forth.

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

No. 22108.—26th November, 1906.—JOHN EDWARD FRIEND, of Albion Street, Annandale, New South Wales, Australia, Engineer. Improvements in rotary engines.

Extract from Specification.—The invention relates to the class of rotary engines wherein a piston or pistons connected directly to a main shaft are rotated within an annular chamber by steam-pressure. A motor embodying my improvements comprises a circular casing having one end integrally formed and its opposite end closed by a cover. Inwardly projecting bearings integral with the end of the casing and the cover are provided for a main shaft, which is further supported by bearings supported upon brackets upon the exteriors of the casing and cover. These bearings are adjustable in all directions by set-screws and lock-nuts in order that the shaft may be maintained truly axial with the casing. Corresponding circular walls integral with the end of the casing and with the cover project towards each other within the casing, a space being provided between the ends of said walls which is occupied by a disc fixed to the main shaft. An annular chamber or cavity is thus formed between the walls and the casing. A piston fitting and rotatable within the annular chamber is formed integrally upon the disc, and special means are provided for making the piston steam-tight in the said chamber. Admission of steam to and exhaust of steam from the annular chamber is controlled by a valve working within a cylinder having steam and exhaust ports, the steam-ports leading to a steam-chest upon the top of the casing. This valve is oscillated by means of an eccentric mounted upon the main shaft, and having forked eccentric rod pivoted to a slotted quadrant fixed upon the spindle of the valve. A reversing handle pivoted upon the pin of the fork of the eccentric rod is slidable upon the slotted quadrant, and is provided with a spring catch adapted to engage teeth formed upon each end of the said quadrant. The engine is reversed by moving the reversing handle to one end or the other of the slotted quadrant. A rocking-valve is mounted upon a shaft within the steam-chest referred to, and has a rounded top made steam-tight with the top of the steam-chest by means of a packing-bar. The ends of the rocking-valve are likewise made steam-tight with the steam-chest. When the piston during its rotation has passed the top of the casing the valve is immediately rocked across the chamber so that one of its edges bears upon the top of the wall referred to, steam passing into the annular chamber between it and the piston until it is cut off by the valve referred to. Exhaust steam upon the other side of the rocking-valve escapes through the valve, and passing round the casing issues through an exhaust-pipe at the bottom thereof. The rocking-valve is operated by means of a cam provided with grooves adapted to receive rollers mounted upon the end of a lever pivoted upon a bracket secured to the end of the casing. The upper end of this lever is slotted to receive a roller mounted upon a crank-pin of a crank secured to the shaft of the rocking-valve. The revolution of the cam oscillates the lever as required to rotate the piston in either direction.

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

(Specification, 12s.; drawing, 7s.)

No. 22115.—27th November, 1906.—MICHAEL JOHN HOOPER, 552 Station Street, North Carlton, Melbourne, Victoria, Australia, Carpenter. Improvements in and connected with oil-lamp burners.

Extract from Specification.—According to this invention, which has been designed specially with a view to enable the improvements to be used with lamps at present in use, the burner is furnished with a pivoted extinguisher comprising preferably two members or plates adapted to be actuated by the removal of the lamp chimney and by the placing of the same in position on the gallery over the burner. Each of these members is attached to an arm or lever passing downwardly through apertures in the base of the burner-cone, and they are constructed in such a manner that they may be conveniently connected to and actuated by the chimney holders or clamps of the burner gallery. The extinguisher plates, which are projected outwardly by the placing of the chimney in position spring inwardly immediately the chimney is removed, and enclose the wick-tube, thereby extinguishing the flame. A casing is provided which surrounds the upper portion of the wick-tube for the purpose of regulating the air-supply to the flame, part of the air ascending the spaces between the casing and the wick-tube, and part between the casing and the inner sides of the burner-cone.

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

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

No. 22128.—29th November, 1906.—HARRY ROBERT LEES, of Daylesford, Victoria, Australia, Teacher of Music. Improvements in potato diggers, cleaners, graders, and baggers, usable also for analogous purposes.

Claims.—(1.) In a machine for harvesting potatoes, the combination of plant-top removal means, a revolvable drum having curved trenching-forks, means to adjust the working height of the removal and trenching devices, a series of fork cleaning and potato-tipping chutes, means to operate the said chutes, a swing rake or fork, means to move the same, a screen set transversely behind the swing rake, and gearing to drive the drum and screen, substantially as described. (2.) In a machine for harvesting potatoes, a swing rake actuated