July 11.] THE NEW ZEALAND GAZETTE. 2119

No. 22884.—25th May, 1907.—GEORGE WHITEFIELD HOPKINS, of Cleveland, Ohio, United States of America. Improvements in acetylene blow-pipes.

Extract from Specification.—This invention relates to improvements in acetylene blow-pipes, and has for its object the arrangement of suitable means in connection with the burner for preventing the heating of the same to a point which is sufficient to decompose the acetylene gas, since this gas is converted at a very low temperature, 600° Fahr. for example, into benzine vapour, and these burners are required to stand a much greater heat. The invention more specifically set forth contemplates the use of a suitable burner having a jacket, preferably a water-jacket, adapted to receive a medium for affecting the parts to bring them to the proper temperature for proper combustion, and yet preventing the heating of the acetylene gas to the point of decomposition. It is also a part of the invention to provide, in connection with the water-jacket, suitable means for supplying hot and cold water automatically, and to regulate such supply by a thermostatic device whereby, when the burner or blow-pipe is used with other than acetylene gas which require different temperatures for producing the proper combustion, the blow-pipe itself will regulate the temperature of the water passing to the jacket, so that the gas will be heated or cooled as the case may be.

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

(Specification, 9s. 6d.; drawing, 1s.)

No. 22886.—25th May, 1907.—HORACE WORTH LASH, of Cleveland, Ohio, United States of America, Mechanical Engineer. Process of reducing iron-oxides.

Claims.—(1.) The method of reducing iron-oxides, comprising intimately mixing finely divided oxide of iron with finely divided cast iron and carbonaceous material, charging the same into an electric furnace, and subjecting the mixture to a smelting heat. (2.) The method of reducing iron-oxides, consisting in forming a charge of intimately mixed finely divided cast-iron and oxide of iron with additional carbonaceous material and fluxes, charging the same into an electric furnace, and subjecting the charge to a smelting heat in a non-oxidizing atmosphere. (3.) The method of reducing iron-oxides, comprising subjecting a mixture of finely divided oxide of iron and finely divided cast iron and carbonaceous material to a smelting heat in a non-oxidizing atmosphere. (4.) The method of reducing iron-oxides, consisting in forming a charge comprising a mixture of finely divided oxide, finely divided cast iron, carbon, and finely ground readily combustible material, charging the same into an electric furnace, and subjecting the same to a smelting temperature.

(Specification, 4s. 3d.)

No. 22887.—25th May, 1907.—CYRUS CHAMBERS, JUN., of Overbrook, Montgomery, Pennsylvania, Founder and Machinist. Dough-mixing machine.

Claims.—(1.) A dough-mixing machine of the kind described, having a sifting-hopper and a sifter-bar operating therein, a mixing-basin and mixing mechanism operating therein, said elements so positioned, proportioned, and operated that the whole charge of flour will be delivered in separated particles from the hopper to the basin and mixed with the liquid contained in the basin within the space of one minute, or within a space of time insufficient for the development of the gluten. (2.) In a dough-mixing machine of the kind referred to, having its various parts so positioned, proportioned, and operated that the flour will be delivered from the hopper to the basin in gradually diminishing quantities, and the mixing mechanism will have an efficiency relative to the discharge from the sifting-hopper, so that said mixing mechanism will be able to mix all the flour as the same is delivered to the mixing-basin. (3.) In a dough-mixing machine of the kind referred to, the sifter-hopper having a perforated bottom extending substantially around the flour capacity, the sifter-bar sweeping said perforated bottom throughout its extension, so that, as the level of the flour descends in the hopper, a gradually diminishing amount will be sifted therethrough at each oscillation of the bar. (4.) In a dough-mixing machine of the kind referred to, the area of the horizontal delivery of the sifting-hopper being equal to the horizontal receiving opening of the mixing chamber, so that the flour can fall direct from the sifter throughout the whole area of the mixing-basin. (5.) In a dough-mixing machine of the kind referred to, the mixing-basin provided with mixing-rods rotating in opposite directions upon horizontal axes, and having oppositely directed spiral formations so that said rotating elements shall tend to move the dough in opposite directions parallel with said axes of rotation, whereby the various portions of the dough are constantly shifted longitudinally to insure an even mixture. (6.) In a dough-mixing machine of the kind referred to, the mixing-rods rotating in circles and in opposite directions to lift the dough and draw it apart above the liquid to aerate the same.

(Specification, 12s.; drawing, 4s.)

No. 22888.—25th May, 1907.—CYRUS CHAMBERS, JUN., of Overbrook, Montgomery, Pennsylvania, Founder and Machinist. Process of mixing dough.

Claim.—The process of making dough, which consists in separating the flour particles and delivering said particles to the liquid, so that each particle of flour will be surrounded by moisture before any part becomes glutenous or viscous, whereby a thorough saturation of each granule is insured.

(Specification, 4s. 6d.; drawing, 3s.)

No. 22889.—25th May, 1907.—THOMAS CLAUDE DURHAM, of 111 Fifth Avenue, New York, United States of America. Improvements in razors.

Claims.—(1.) A razor in which a thin detachable blade is positioned on a support or clamp, the support or clamp being magnetized to retain the blade in position. (2.) A razor in which a thin detachable blade is positioned between a supporting member and a clamping member, one of the members being provided with means engaging the other member, and having a sliding movement thereon to lock the blade in position. (3.) A razor in which a thin detachable blade is positioned between a support and a clamp, the clamp being provided with means for positioning the blade and with means engaging the support, and having a sliding movement thereon to lock the blade in position. (4.) A razor in which a thin detachable blade is positioned between a support and a clamp, the support having a shank extended from one end thereof, and lying in planes coincident with the planes of the blade to balance the device. (5.) A razor in which a thin detachable blade is positioned between a support and a clamp, the clamp being provided with a headed stud or the like engaging the support, and having a longitudinal sliding movement thereon to lock the blade in position. (6.) A razor in which a thin double-edged detachable blade is positioned between a supporting member and a clamping member, one of the members being provided with means engaging the other member and having a sliding movement thereon to lock the blade in position, and one of the members being provided with a double safety-guard co operating with the blade. (7.) A razor in which a thin detachable blade is positioned between a supporting member and a clamping member, the locking means being located between the exterior of the supporting member and the exterior of the clamping member. (8.) A thin razor blade provided with an elongated aperture by means of which it may be positioned and secured to a holder.

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

No. 22895.—23rd May, 1907.—REGINALD AUBREY FESSENDEN, of 1737 Riggs Place, Washington, D.C., United States of America, Electrical Engineer. Improvements in electric signalling.

Claims.—(1.) As an improvement in the art of signalling the method, substantially as described, of producing indications at the receiving-station by the interaction of a field of force due to received impulses with a field of force due to impulses which are generated locally. (2.) In the method of the preceding claim, producing a field of force by impulses which are generated by a constantly operative local source of energy, and which differ in frequency from the received impulses by an amount which causes the production of beats. (3.) In the method of the preceding claims, producing and controlling the interaction between the two fields of force by a constantly operative frequency determining element, substantially as described. (4.) As an improvement in the art of signalling the method of retransmitting signals, which consists in controlling the production of impulses in a sending circuit by means of a movable element the movement of which is produced by the interaction of the field of force due to the received impulses with a field of force due to impulses which are generated locally. (5.) As an improvement in the art of signalling the method of simultaneously transmitting and receiving signals, which consists in producing a field of force by impulses which are generated locally to react with a field of force due to the received impulses, the locally produced impulses differing in frequency by a small