July 5.] THE NEW ZEALAND GAZETTE. 1327

with the working-tool of a normally closed throttle-valve located within the cylindrical body of the tool, and means intermediate to said valve and working-tool for opening the valve by the act of pressing the tool to its work. (26.) In a pneumatic hammer, the combination with the working-tool of a throttle-valve located within the cylindrical body of the tool for controlling the admission of motive fluid to the tool, a spring normally pressing said valve forward and holding it in closed position, and means intermediate to said valve and working-tool for forcing said valve backward to open position by the act of pressing the tool to its work. (27.) In a pneumatic hammer provided with an annular inlet-groove for the motive fluid, the combination of a normally closed cylindrical throttle-valve controlling said groove, and means operated by pressing the tool to its work for opening said valve to admit motive fluid to the tool. (28.) In a pneumatic hammer having an annular inlet-groove for the motive fluid, the combination of a cylindrical throttle-valve controlling said groove, a spring normally pressing said valve forward in position to close said groove, and means operated by pressing the tool to its work for forcing said valve backward and uncovering said groove. (29.) In a pneumatic hammer having an annular inlet-groove for the motive fluid, the combination of a cylindrical throttle-valve for controlling said groove, a spring normally pressing said valve forward in position to close the groove, a working-tool carried by the front end of the cylinder, and rods extending longitudinally through the cylinder-wall between said working-tool and valve, for forcing said valve backward and uncovering the inlet-groove. (30.) The combination with a pneumatic hammer and its removable working-tool F of the spring clip G co-operating therewith, in the manner and for the purpose described. (31.) The spring coupling-clip G, adapted to co-operate in the manner described with annular shoulders upon the two members to be coupled together.
(Specification, 16s.; drawings, 13s.)

No. 12723.—22nd June, 1900.—THOMAS NICHOLLS BEAVAN, of Seldown House, Poole, Dorset, England, Gentleman (assignee of Elias Petersson, of 32, Avenue de la Couronne, Brussels, Belgium, Mining Engineer). An improved process for the treatment of sulphurous ores containing arsenic, antimony, or tellurium.

Claims.—(1.) The removal of antimony and tellurium from sulphurous ores containing them by direct volatilisation, by admixing the ore in a powdered state with powdered carbon or carbonaceous material, and heating the mixture in a retort or muffle furnace to a temperature sufficient to volatilise the antimony as stibnite vapour. (2.) A process of disaggregation of sulphurous ores containing arsenic, antimony, or tellurium, consisting in pulverising the ore, in mixing the same with carbon, likewise pulverised, and in heating the mixture in a retort or muffle furnace sufficiently to volatilise the arsenic-sulphide, and in collecting this vapour in a suitable condenser, and afterwards heating the mixture to a higher temperature to volatilise the antimony-sulphide and similarly collect it in a condenser, substantially as described. (3.) The removal of arsenic, antimony, and tellurium, or any of these, from sulphurous ores containing them, by making up the ore when pulverised and admixed with carbonaceous material into blocks or bricks, and afterwards heating such blocks or bricks in a retort or muffle to a temperature to volatilise the arsenic, antimony, or tellurium.
(Specification, 6s.)

No. 12724.—22nd June, 1900.—ARCHIBALD WHITE MACONOCHIE, of the firm of Maconochie Brothers, of 131, Leadenhall Street, London, England, Merchants. Apparatus for use in connecting together tins containing provisions or the like.

Claims.—(1.) An apparatus for use in connecting together tins containing provisions or the like, the said apparatus consisting of a base carrying heads and means for adjusting the said heads, or one of them, to grip and to release the tins, and means for supporting the tins and allowing of their being moved round during soldering, substantially as described. (2.) An apparatus for use in connecting together tins containing provisions or the like, the said apparatus consisting of a base with heads, one or both of which is or are movable, a block or blocks shaped to receive the tins, and with a recess therein or a space between them to give access to the tins and strip for soldering, and a wedge to fix and release the said tins, substantially as described, and illustrated in Figs. 1, 2, and 3 of the drawings. (3.) An apparatus for use in connecting together tins containing provisions or the like, the said apparatus consisting of a base with heads, one or both of which is or are movable by means of a screwed rod, and a block or blocks shaped to receive the tins, and with a recess therein or a space between them to give access to the tins and strip for soldering, substantially as described, and illustrated in Fig. 6 of the drawings.
(Specification, 4s.; drawings, 8s.)

No. 12725.—22nd June, 1900.—EDWARD WATERS, Jun., a member of the firm of Edward Waters and Son, of 131, William Street, Melbourne, Victoria, Patent Agents (nominee of Albert Husson, of Porrentruy, Berne, Switzerland, Notary, and Edward William Lancaster, of 28, Victoria Street, Westminster, England, Civil Engineer). Improvements in acetylene-generators.

Claims.—(1.) In an acetylene-generator, the combination of a vessel, preferably cylindrical, having an inclined or conical bottom and a suitable cover, with a tapering or conical charging-hopper fixed in the said cover, the delivery orifice of the said hopper being below the working-level or the water in the generator, a casing surrounding the lower portion of the said hopper, inclined planes formed in one with or attached to the casing below the hopper, baffle-plates attached to the casing below the said inclined planes, and an inclined bottom to the said casing, all substantially as specified, and shown by Figs. 1 and 2 of the drawings. (2.) In an acetylene-generator, the combination of a vessel, preferably cylindrical, having an inclined or conical bottom and a suitable cover, with a tapering or conical charging-hopper fixed in the said cover, the delivery orifice of the said hopper being below the working-level of the water in the generator, and two or more inclined planes or shoots formed in one with or attached to a casing surrounding the lower portion of the said hopper, the said shoots being below the delivery orifice of the hopper, and provided with vertical mouths of mouths slightly inclined inwards, all substantially as specified and for the purpose stated. (3.) In acetylene-generators, the combination, with open-topped charging-hoppers of one or more baffle-plates or inclined planes, for the purpose stated. (4.) In an acetylene-generator, the combination of two concentric vessels forming a generator, with a domed vessel or bell forming a gasholder, the said bell being provided with a charging-hopper, and casing surrounding the lower end of the hopper, all substantially as specified, and illustrated by Fig. 3 of the drawings. (5.) In acetylene-generators, the stirring-device, substantially as and for the purpose specified. (6.) Acetylene-generators constructed as shown by the drawings.
(Specification, 7s.; drawings, 6s.)

No. 12726.—22nd June, 1900.—GEORGE JOHN HOSKINS and CHARLES HENRY HOSKINS, of Sydney, New South Wales, Engineers. Improved appliances to be used in closing the locking-bars on the longitudinal joints of certain types of rivetless metal pipes.

Claims.—(1.) In machines that are used in closing the seams of the locking-bar type of rivetless metal pipes, a solid block or internal anvil such as O, which is permanently fixed intermediately between an upper anvil such as L and a lower closing-tool such as K, such anvil being axially provided with a hydraulic ram or other equivalent mechanical contrivance whereby the pipe may be hauled intermittently over the block or anvil O for the purpose of enabling the seams to be closed, as specified. (2.) In machines that are used in closing the seams of the locking-bar type of rivetless metal pipes, in combination, a carriage or truck such as A, a solid permanently fixed block such as O, and hydraulic or other mechanical appliances situated axially in respect to the block or anvil, all as and for the purposes set forth.
(Specification, 3s. 9d.; drawings, 13s.)

No. 12727.—22nd June, 1900.—GEORGE JOHN HOSKINS, of Sydney, New South Wales, Engineer. An improved machine for “buffing” or upsetting the edges of metal plates to be used in the construction of a certain class of rivetless metal pipes.

Claims.—(1.) In machines for “buffing” or upsetting the edges of metal plates, two series of pressure and anti-friction rollers, which are preferably loose on their axial shafts, each series being divided into two sets with a space between the sets on the same axis, each set in the upper series being vertically above the corresponding set in the lower series, in combination with two series of “buffing” rollers on vertical axes, one series at each end of the pressing and anti-friction rollers, and so disposed that the horizontal distance between the first pair shall be greater than the horizontal distance between the second pair, and so on to the last pair, two lines being drawn through the vertical axes of such rollers converging to a point beyond the exit of the plate from the machine, as and for the several purposes set forth. (2.) In machines for “buffing” or upsetting the edges of metal plates, two series of pressure and anti-friction rollers and two series of “buffing” rollers, all as set forth in claim 1, the axes of the two series of “buffing” rollers being in the same vertical plane with the axes of the sets in the upper and lower series of pressure-rollers against which they lie, as set forth. (3.) In machines for “buffing” or upsetting the edges of metal plates, two series of pressure and anti-friction rollers,