improvements in the manufacture of candles,-being partly a communication.-Sealed 9th November-6 months for in

rolment.

John Garnett, of Liverpool, merchant, and Joseph Williams, of the same place, manufacturing chemist, for an improved method of manufacturing salt from brine.-Sealed 9th November-6 months for inrolment.

John Burnell, the Younger, of Whitechapel, manufacturer, for improvements in the manufacture of leaves or sheets of horn, commonly called lantern leaves, and in the construction of horn lanterns.-Sealed 9th November-6 months for inrolment. John Edwards, of Cowcross-street, Gent., for an improved strap or band for driving machinery, and for other purposes.-Sealed 9th November-6 months for inrolment.

James Stewart, of Osnaburgh-street, St. Pancras, Piano-fortemaker, for certain improvements in the action of horizontal piano-fortes. Sealed 11th November-6 months for inrol

ment.

George Allarton, of West Bromwich, surgeon, for certain improvements in the method of balling and blooming iron.-Sealed 11th November-6 months for inrolment.

John Peter Booth, of Hatton Garden, feather merchant, for certain improvements in the manufacture of a substance or compound fabric, which will be applicable to the making of quilts, coverlets, and wadding, for purposes of clothing or furniture. -Sealed 11th November-6 months for inrolment. Isaac Davis, of New Bond-street, optician, for improvements in the manufacture of sealing wax, which compounds are applicable to other useful purposes.-Sealed 11th November-6 months for inrolment.

Edward Joseph François Duclos de Boussois, of Clyne Wood Metallurgical Works, Swansea, Glamorgan, engineer, for improvements in the manufacture of copper.-Sealed 11th November-6 months for inrolment.

John Onions, of Field-lane, Darlaston, Stafford, engineer, for improvements in the manufacture of certain descriptions of nails,

screws, and chains.-Sealed 11th November-6 months for inrolment.

James Young, of Newton-le-Willows, Lancaster, chemist, for certain improvements in the manufacture of ammonia, and the salts of ammonia; and in apparatus for combining ammonia, carbonic acid, and other gases, with liquids.-Sealed 11th November-6 months for inrolment.

Isaac Dodds, of Sheffield, engineer, for certain improvements in the modes or methods of supplying gas, for the purposes of illuminating towns and other places.-Sealed 13th November -6 months for inrolment.

Henry Mortimer, of Frith-street, Soho, Gent., for improvements in covering ways and surfaces, and in constructing arches.Sealed 16th November-6 months for inrolment. John Squire, of Albany Place, Regent's Park, engineer, for certain improvements in the construction of steam boilers or generators.-Sealed 16th November-6 months for inrolment. Robert Stirling Newall, of Gateshead, Durham, wire rope manufacturer, for improvements in the manufacture of flat bands.Sealed 16th November-6 months for inrolment.

John Venables, of Burslem, Stafford, manufacturer, and John Tunnicliff, of the same place, bricklayer, for a new and improved method of building and constructing ovens, used by potters and china manufacturers, in the firing of their wares.— Sealed 20th November-2 months for inrolment.

William Manwaring, of York-street, Lambeth, engineer, for certain improvements in the manufacture of sugar.-Sealed 23rd November-6 months for inrolment.

Richard Gurney, of Treevinnion House, Cornwall, Esq., for a

method of cutting wood, and incrustating the same, in order to present a sure footing for horses, and other purposes.-Sealed 25th November-6 months for inrolment.

The Satellites of Jupiter are not visible this Month, Jupiter being too near to the Sun.

THE

London

JOURNAL AND REPERTORY

OF

Arts, Sciences, and Manufactures.

CONJOINED SERIES.

No. CXXI.

Recent Patents.

TO THE RIGHT HONORABLE FRANCIS EARL of Ducie, of Woodchester Park, in the county of Gloucester, RICHARD CLYBURN, of Uley, engineer, and EDWIN BUDDING, engineer, of Dursley, both in the same county, for their invention of certain improvements in machinery for cutting vegetable and other substances.[Sealed 15th October, 1840.]

THIS invention of certain improvements in machinery for cutting vegetable and other substances, consists, firstly, in the application of a peculiarly formed rotary knife-edged tool or cutter to the purposes of cutting, paring, or shaving certain substances hereinafter mentioned; such rotary tool or cutter consisting of a blade or blades, coiled spirally, either upon a cylinder or upon rims, hoops, discs, or wheels; each blade being so coiled as to form, at all points of its width or transverse section, an angle with the axis or centre line of the coil so formed, in order that a sharp cutting 2 s

VOL. XIX.

edge may be produced, by removing the outside of the thickness of such blades in an angular direction, and admitting of a ready mode of sharpening the same, without the necessity of removing or detaching the blades from the axis on which they revolve, or the axis itself, from the machine.

Secondly,-In supporting such blades or cutters, throughout their whole length, upon a cylinder, suitably formed, when used for the purpose only of cutting hay, straw, or other such substances, intended to be used as food for cattle or other animals.

Thirdly,-In the employment of a spiral or coiled blade or cutter, for the purpose of cutting turnips, mangel wurzel, or other roots, into slices or other pieces, to be used as food for cattle, sheep, or other animals.

Fourthly,-In a mode of changing the speed of the feeding rollers, in what are commonly called chaff-cutting machines, in order that the hay, straw, or other matter, under operation, may be cut into different lengths, if required.

And lastly,-In giving to spiral or coiled rotary blades or cutters, a notched or serrated edge, resembling a sickle or finely-cut saw; such edge being capable of retaining that property as it is ground away by the process of sharpening.

In Plate XV., at fig. 1, is shewn one construction of cutter, the application of which constitutes the first head of the invention. The cylinder or axle, in this instance, is of iron, having screw-like or spiral grooves or channels b, b, b, formed thereon. One side of these channels are inclined planes, forming an angle with the axis and periphery of the cylinder. Upon these inclined planes or sides of the grooves, the knives or blades c, c, c, are placed or wound, in a spiral direction, and attached thereto by screws, rivets, or other means; d, d, is the axis, upon which the cylinder with its blades, revolves, and is keyed to the arms or discs e, e, at each end of the cylinder.