less pervious to water, and preserves better its pliability during use than does leather prepared by the ordinary means. Patent dated May 22, 1834. Expired, May 22, 1848.

Joseph Morgan, of Manchester, pewterer, for certain improvements in the apparatus used in the manufacture of mould candles. Patent dated May 22, 1834. Expired, May 22, 1848.

Charles L. Stanilas, Baron Heurteloup, of London, for improvements in certain parts of certain descriptions of fire-arms. Patent dated May 22, 1834. Expired, May 22, 1848.

Andrew Smith, of London. engineer, for a new and improved method of preparing phormium tenax, hemp, flax, and other fibrous substances, and rendering the same fit for hackling in the manufacture of linen, and for spinning in the manufacture of ropes, cordage, lines, and twines. Patent dated May 24, 1834. Expired, May 24, 1848.

Luke Smith, of Manchester, and John Smith, machine maker, for certain improvements in weaving machinery. Patent dated May 23, 1834. Expired, May 23, 1848.

Philip A. De Chapeaurouge, of London, gentleman, for a machine, engine, or apparatus for producing motive power, which he denominates a

"self-acting moving power," and called in France by the inventor, "voland moteur perpetuel." (Communicated by a foreigner.) Patent dated May 24, 1834. Expired, May 24, 1848.

Stephen Hawkins, of Portsmouth, gentleman, for certain improvements in warming-pans, or apparatus for warming beds and other purposes. Patent dated May 24, 1834. Expired, May 24, 1848.

John G. Bodmer, of Bolton, engineer, for certain improvements in steam-engines and boilers, applicable both to fixed and locomotive engines. Patent dated May 24, 1834. Expired, May 24, 1848.

John G. Bodmer, of Bolton, engineer, for certain improvements in the construction of grates, stoves, and furnaces applicable to steam-engines, and many useful purposes. Patent dated May 24, 1834. Expired, May 24, 1848.

William Crofts, of Nottingham, for certain improvements in certain machinery for making lace, commonly called bobbin-net lace. Patent dated May 27, 1834. Expired, May 27, 1848.

William H. Hornby, and William Kenworthy Blackburn, engineer, for certain improvements in power looms to be used in the weaving of cotton, linen, silk, woollen, and other cloths. Patent dated May 27, 1834. Expired, May 27, 1848.

NOTICE. We wish it to be distinctly understood, that, after this date, all specifications will be reported as soon as enrolled. Such as are not enrolled will be named.

NOTE.-Hill's specification for the manufacture of acids, &c., has not been enrolled.

AN INVENTOR.-Consult Dr. Ryan, at the Polytechnic Institution; he will quickly "precipitate" the "intractable compound.'

A. B. C.-There is a patent just sealed for the manufacture of pyroligneous acid (Solomon's and Azulay's), of undoubted value. ALPHA. Your case is unfortunately not singular. It shows the danger of communicating an invention to a patentee whose specification is unenrolled. There cannot be a more injudicious proceeding, unless the patentee be known as a man of probity. From your statement, it would appear that you communicated part of your invention to a patentee, who, after making trial of it, claims it as his invention in his specification. Now, unless you have legal proof that the patentee stole your invention, you have no remedy against him. But at the same time, you will be enabled to patent the remaining part of your invention, and need fear no opposition from so unprincipled a man. The weekly numbers of the Journal are better than the

SUBJECT OF DESIGN.

Water Cart.
Whishaws Telekouphenon,
or Pneumatic Telegraph.
Blind Pulley.

monthly parts, inasmuch as they give information earlier. From what we know of the invention of the party named, we should say his patent was not worth 15.000 farthings. CLASSIFIED LIST OF PATENTS FOR 1847.-Next week, if possible, or, at latest, in the succeeding number, will be published a List of Patents for 1847, classified under the alphabetical names, and again under the titles. Such Lists were formerly published at 2s. 6d., but have been discontinued; and at the request of friends we are induced to issue the List, which we shall henceforth publish annually, in all probability, for our arrangements are not yet completed. The List will be published as a double number or supplement.

J. C. X. With the multitude of our correspondence, it is perfectly impossible for us to recollect the subject matter of your former letters. Had you not better write us again, but with real name, in order to avoid mistakes.

ERRATA.-Bursill and Radford's specification, p. 631, col. 2, 27th line from top, for "by the aid of marginal taper, grooves for the introduction of which spaces are left in the upper gun-metal plates," read "by the aid of marginal tapes, grooves for the introduction of which tapes are left in the upper gun-metal plates."

No. 106.]

[PRICE 6D.

CURTIS AND LAKIN'S IMPROVEMENTS IN MACHINES FOR SPINNING COTTON, ETC.

VOL. V.

14.

MATHEW CURTIS, of Manchester, machinist, and ROBERT LAKIN, for certain improvements in machines used for preparing to be spun and spinning cotton and other substances, and for preparing to be woven and weaving such substances when spun. Patent dated October 14th, 1847. Enrolled April 14th, 1848.

THIS specification relates to several improvements effected in the machinery and apparatus employed in the manufacture of cotton and other fibrous substances, both in the preparing and spinning processes, as also in the weaving process. The first improvement, which relates to the preparing process of the manufacture, is to effect the detection of the absence of any of the slivers of cotton passing through the machine, by reason of their breakage, or from any other cause; as also the presence in the sliver of cotton of a knot, doubling, entanglement, or any lump whatever. The absence of the sliver in the one case, or the presence of any undue thickness or enlargement of it in the other case, being detected by the immediate stoppage of the working of the machine. The apparatus invented by the patentees for effecting this object and described by them in their specification, is simple and ingenious, and applicable to machines employed in the processes of the cotton manufacture preparatory to the spinning process, such as drawing-frames, slubbing-frames, and roving-frames. The apparatus consists of a series of tumblers or bell-crank levers, beneath each of which one individual sliver of cotton, or other fibrous substance, passes in its passage through the machine. The tumblers are supported upon the slivers, therefore in the event of the breakage of the sliver the tumbler is no longer supported and it falls, which, in consequence of the alteration in the position of the tail of the tumbler, acts upon apparatus connected with the driving-strap guide, changing the strap from the fast to the loose pulley, and thereby stopping the movements of the machine; should, however, instead of the breakage of the sliver, there occur in any one of them any knot, doubling, entanglement, or enlargement, when such enlargement comes to the arm of the tumbler, and in passing under it the tumbler is raised; the tail, as in the breakage of the sliver, acts upon the apparatus con

-B,

nected with the strap-guide in similar manner, and the further movements of the machine are arrested. The annexed engravings represent this first improvement of the patentees; fig. 1, being a side elevation of a portion of a drawing-frame, sufficient to shew the application of the patentees' improved apparatus, and fig. 2, a back view of the tumblers, being a section through the line, Abetween the tumblers and the drawing-rollers, C,C,C,C, the drawing-rollers arranged in the usual manner upon the frame, D, of the machine; upon the shaft of the lower roller of the first pair of drawing-rollers is fixed the spur-wheel, E, gearing into and driving the carrier-wheel, F, revolving upon a fixed stud projecting from the frame, D; the carrier-wheel, F, gears into and drives the second carrierwheel, G, which again gears into and drives the wheel, H, fixed upon the shaft of the roller, I; this roller extends the whole width of the machine just behind and below the tumblers or bell-crank levers, L,L', and, L", upon the circumference of the roller, I; appertaining to each tumbler are projected two pairs of studs, one pair on either side of the tail of the tumbler; these studs project from opposite sides of the circumference of the roller; placed loosely upon the roller, I, is the bell-crank lever, M, the one-arm, M', of which carries a pin, upon which revolves the second carrier-wheel, G; the second arm M", of this bell-crank lever carries the balanceweight, N, the purpose of this is to keep the second carrier-wheel, G, in gear with the first carrier-wheel, F, so long as the slivers of cotton are present and no knot or obstacle occurs therein; the other and third arm, M", is in such position while the machine is at work that the end of the rod, O, which passes through the frame, D, bears and presses against the end of the arm, M"; such pressure being caused by the elasticity of the helical spring, P; the rod, O, passes across the machine, the other end being attached to the driving-strap guide, which is thus controlled by the movement of the rod, 0. The tumblers or bell-crank levers, L,L',L", are formed of the peculiar shape shown, they move upon the fulcrums formed upon the frame, R, extending across the front of the machine and fixed to the main frame, D. The upright pieces

of the frame, R, support the fulcrum of the tumblers, as also to allow the ends of the horizontal arms of the tumblers, which rest upon the sliver of cotton, to pass between them, thereby preventing the possibility of the slivers of cotton slipping from under the arms of the tumblers; the arms of the tumblers projecting upwards are for the purpose of raising the tumbler by hand when required to place a sliver of cotton beneath, or for other purposes. The tails of the tumblers, when the machine is working satisfactorily, is in such a position that thestuds upon the roller, I, pass freely on either side of them. The action of the apparatus will be thus: -while the whole of the slivers are present and of the proper thickness and substance, the tails of the tumblers hang in such position that the roller, I, freely revolves, and the studs thereon pass the tails of the tumblers freely on either side; the bell-crank lever, M, by the action of the balance-weight, N, maintains the second

carrier-wheel, G, upon the other arm of the lever, in gear with the first carrierwheel, F, upon the fixed stud, and with the wheel, II, upon the roller, I; as, also, the other arm, M", of the lever, against the projecting end of the rod, O, and thus maintaining, by its connection with the driving-strap guide, the driving-strap upon the fast pulley, and the movements of the machine are kept in full operation; but should any one of the slivers of cotton or other fibrous substance be absent, from breakage or from any other cause, the support being thus removed, the horizontal arm of the tumbler will fall and assume the position shown at, L'; the tail of the tumbler has now also changed its position, having passed to the right of its former position; the position it now occupies is such that it is immediately over one of the studs upon the roller, O, which striking against the end of the tail, cannot pass; the revolutions of the roller, O, therefore ceases, and, consequently,

the revolutions of the spur-wheel, H, fixed to the shaft of the roller, O, are also suspended, which also puts a stop to the revolutions of the second carrierwheel, G; upon the pin, attached to the arm, M', of the bell-crank lever, M; the first carrier-wheel, F, which derives its motion from the main driving-shaft, continues, however, to revolve, the teeth of which acting upon the teeth of the now stationary carrier-wheel, G, 'throws the teeth of that wheel out of gear with its own, and thereby depresses the arm, M', of the bell-crank lever, and also moving the arm, M", forward, out of contact with the end of the horizontal rod, O, which is therefore free to move outwards; the helical spring, P, now acts by its elasticity, and draws the rod, O, which, by its connection with the driving-strap guide, draws also the guide, and thereby shifts the driving-strap from the fast to the loose pulley, and thus suspends the movements of the machine. Should, however, any knot or doubling, or other obstacle occur in any of the slivers of cotton under operation in the machine, the same results will take place, but the tumbler will be raised and take the position indicated at L"; the tail of the tumbler will now pass a little to the left of its former position, and one of the studs on that side will come into contact with it, and thereby stop the revolutions of the roller, O, as before described, and likewise resulting in the suspension of the movement of the machine. There are studs fixed to the frame, R, as represented at R', behind the tails of the tumblers, for the purpose of preventing the tails moving too far.

[The remaining portion of this specification will be given in our next impression.]

PIERE ARMAND LE COMTE DE FONTAINEMOREAU, of 15, New Broad Street, City, for certain improvements in manufacturing braids, plats, fringes, gimps, and other similar articles. Patent dated Nov. 18th,

1847. Enrolled May 18th, 1848. THIS invention, as communicated to the patentee, comprises improvements which consist of certain new arrangements and modifications of certain parts of a loom, and of new or improved apparatus to be used in conjunction therewith, for making fringe, braiding, borders, edges, and other articles of trimming and linen drapery, and also in employing, for the production of the said before-mentioned articles, such matters as netting, chenielle, lace, horse-hair, flexible tinsel, caoutchouc, straw, and many other similar substances. From the annexed description (the patentee observes) it will readily be perceived that he is enabled to obtain products of dimensions and character impossible to be obtained at present, and to effect, at the same time, a saving of labour with a diversity of work not hitherto attained; for the proper exemplification of which he deems it necessary to point out in the new processes, the improved modifications in manufacturing, and to compare them with the mode generally employed for producing similar articles, and to convince, beyond a doubt, the advantage of the former over the latter. The processes forming the subject of the invention differ in the most essential parts from those generally employed for the fabrication of gimps, trimmings, braids, &c. These improvements apply also to articles for which the ordinary process would not be available. The ground of trimmings is made of warp, and the ornaments are formed by the shoots, so that by the present process as many