280
THE NEW ZEALAND GAZETTE.
[No. 9

be controlled so that its piston will deliver light or heavy blows at will, or that air may be shut off when desired. The type of engine shown in the drawings accompanying the specification is that wherein a controlling-valve is employed for admitting and exhausting air to and from the chambers at each end of the piston, causing said piston to reciprocate. A tool in the form of a chisel, caulking-implement, or the like has its shank introduced in the front end of the cylinder or nose of the tool, and receives impacting blows from the forward end of the piston. The object of this present invention is to simplify the construction of engines of the character above described, and at the same time render them economical and efficient in the use of air according to the amount of work being done by the engine. The features of the invention in the tool illustrated in the drawings which are deemed new are, briefly, first, the construction and arrangement of an adjustable throttle-valve for controlling the admission of air to the engine; second, the means employed for locking the rotary parts of the engine against displacement by unscrewing; third, the novel construction, arrangement, and operation of the controlling-valve; fourth, the novel port-arrangements in the cylinder co-operating with a piston operating in a uniform bore throughout the length of said cylinder; and, finally, the invention consists in the construction, arrangement, and combination of the several parts all as described, and pointed out in the claims.

[NOTE.—The number and length of the claims in this case preclude them from being printed, and the foregoing general description is inserted instead.]
(Specification, £1; drawings, £1 1s.)

No. 12321.—16th January, 1900.—HENRY PETTITT, of Kai-korai, Dunedin, New Zealand, Cabinetmaker. Package-filling machine.

Claims.—(1.) In a machine for filling a number of packages, the combination of a hopper capable of being wheeled or slid back or forward such as B¹, B, carrying a self-acting cut-off arrangement and a similar hand arrangement for measuring off required quantities into the spouts of the hopper such as B², B³, B⁵, with a ramming-arrangement such as D, and an ejecting-arrangement such as E, E¹, all substantially as described, and as shown on the drawing. (2.) In combination, a hopper such as B and B¹, the contents of which can be stirred such as in Fig. 5, capable of measuring out proper quantities of material as wanted by such means as B³, B⁷, B⁶, and B², into packages such as C, c², C¹, of ramming the contents by folding and movable set of rammers such as D, and of simultaneously ejecting the whole set of packages by another set of rammers such as E, E¹, the whole substantially formed as set forth, and as shown on the drawing.
(Specification, 4s.; drawings, 5s. 6d.)

No. 12324.—18th January, 1900.—HENRY BRABY, of Ayr, Queensland, Consulting Engineer. Improvements in steam-generators.

Claims.—(1.) In a steam-generator, a plate or block of copper, gun-metal, or other good heat-conducting material, having ways therein for the circulation of water and steam, and capable of being subjected to heat from a furnace or other source of heat, substantially as described. (2.) In a steam-generator, a plate or block of copper, gun-metal, or other good heat-conducting material, having water-ways therein, and provided with caps for returning the water-ways, and capable of being subjected to heat from a furnace or other source, substantially as described. (3.) In a steam-generator, a plate or block of copper, gun-metal, or other good heat-conducting material, having ways therein for the circulation of the water and steam, and holes therethrough for passage of the furnace-heat, substantially as described. (4.) In a steam-generator, the combination with one or more plates of copper, gun-metal, or other good heat-conducting material, having ways therein for the circulation of water and steam, of a feed-pump, injector, or other means whereby the forced circulation of water is maintained, substantially as described and explained. (5.) In a steam-generator, the combination of a series of plates or blocks of good heat-conducting material, having ways therein for the circulation of the water and steam, one or more of the said plates being perforated or not, an equaliser or dome such as G, inlet-valve such as E, and outlet-valve such as F, substantially as described and explained, and as illustrated in the drawings. (6.) The improved generator consisting of the combination and arrangement of the parts substantially as described and explained, and as illustrated in Figs. 1 to 7 of the drawings. (7.) The improved generator consisting of the combination and arrangement of the parts substantially as described and explained, and as illustrated in Figs. 8 and 9 of the drawings.
(Specification, 6s.; drawings, £1 1s.)

No. 12325.—20th January, 1900.—CHARLES HENRY WATERMAN, of Pompton Plains, New Jersey, United States of America, Manager. Process of enamelling.

Claim.—The process set forth of flashing enamel on to surfaces of a refractory material, which consists in applying the enamelling material to the desired surface and subjecting such surface to the action of uniform electric heat delivered at once on and over the entire coated surface in a plane parallel thereto, whereby all the enamelling material is instantaneously and simultaneously fused over the whole surface to which it is applied, while the body of the article is left relatively cool.
(Specification, 3s. 9d.; drawings, 3s.)

No. 12326.—20th January, 1900.—JOHN VAUGHAN-SHERRIN, of 28, Victoria Street, Westminster, Middlesex, England, Electrical Engineer. Improvements in the manufacture of varnishes, drying-oils, enamel paints, and wool-washes, applicable also as insecticides, and for other purposes.

Claims.—(1.) The process for the manufacture of an oleaginous product consisting in heating linseed-oil to about 600° F. (315° C.), sprinkling gradually thereon kauri-gum dust or the like while agitating, adding gradually a suitable drying agent, mixing gradually the aforesaid mixture with rosin while agitating, said rosin having previously been heated to about 400° F. (203° C.), then cooling down the mixture to about 90° to 100° F. (32° to 38° C.), and finally adding petroleum for thinning it down, then leaving the mixture to settle, and then drawing off the clear product, substantially as and in the proportions stated. (2.) The process for the manufacture of a varnish consisting in heating linseed-oil to about 600° F. (315° C.), sprinkling gradually thereon kauri-gum dust or the like while agitating, adding gradually acetate of manganese, mixing gradually the aforesaid mixture with rosin while agitating, said rosin having previously been heated to about 400° F. (203° C.), then cooling down the mixture to 90° or 100° F. (32° to 38° C.), and finally thinning it down with refined petroleum, then leaving the mixture to settle, and then drawing off the clear liquid, substantially as and in the proportions stated. (3.) The process for the manufacture of a substitute for boiled oil consisting in heating linseed-oil to about 600° F. (315° C.), sprinkling gradually thereon kauri-gum dust or the like, adding gradually acetate or borate of manganese, mixing gradually the aforesaid mixture with rosin, said rosin having previously been heated to about 400° F. (203° C.), then cooling down to 90° to 100° F. (32° to 38° C.), and finally thinning it down with refined petroleum, then leaving the mixture to settle, and then drawing off the clear product, substantially as and in the proportions stated. (4.) The modified process for the manufacture of a varnish according to which in the secondly claimed process gum dammer, copal, or the like is substituted for the kauri-gum, and the drying agent used is sulphate or borate of manganese or boric acid. (5.) The modified process of manufacture of an oil according to which in the thirdly claimed process gum dammer is substituted for the kauri-gum, and the drying agent used is sulphate or borate of manganese or boric acid. (6.) The manufacture by a cold process of an oleaginous compound soluble in water by mixing the varnish or the oil made as secondly and thirdly claimed with a caustic alkali solution, adding a little petroleum while agitating, and thinning it down with petroleum, substantially as set forth. (7.) As a new or improved article of manufacture, the varnish made as secondly claimed. (8.) As a new or improved article of manufacture, the substitute for boiled oil made as thirdly claimed. (9.) As a new or improved article of manufacture, the varnish made as fourthly claimed. (10.) As a new or improved article of manufacture, the oil made as fifthly claimed. (11.) As a new or improved article of manufacture, the oleaginous compound soluble in water made as sixthly claimed. (12.) As a new or improved article of manufacture, the enamel or paint made with the varnish or boiled oil made as described. (13.) As a new or improved article of manufacture, the wool-wash made as described.
(Specification, 4s. 3d.)

No. 12327.—20th January, 1900.—S. H. JOHNSON AND COMPANY, LIMITED, the Engineering Works, Stratford, Essex, England (assignee of Samuel Henry Johnson, the Engineering Works, Stratford aforesaid, Metallurgical and Chemical Engineer, and Henry Livingstone Sulman, 60, Gracechurch Street, London, England, Metallurgical Chemist and Assayer). Improvements in or relating to the extraction of metals from ores or slimes, and apparatus therefor.