Lapas attēli
PDF
ePub

which forces out the steel. This operation being performed from time to time until all the steel plate is used, another must be inserted in the same manner.

Having thus described his invention, the Patentee states, that he does not intend to claim any of the parts separately, of which the chisel is composed, but only the whole combined, by which he constructs "an instrument for holding the plate of steel, and which plate of steel may be propelled gradually as it is worn away, and yet when in use it is held rigidly and firmly, and prevented from receding from its work by the male screw, as above described."-[Inrolled in the Inrolment Office, June, 1835.]

TO WILLIAM BRYANT and EDWARD JAMES, of Plymouth, in the county of Devon, merchants, and co-partners, being of the people called Quakers, for their invention of improvements in the manufacture of liquid and paste blacking, by the introduction of India rubber, oil, and other articles and things.-[Sealed 3d December, 1836.]

THE Patentees describe their invention of an improved paste or liquid blacking as consisting in introducing a solution of India rubber or caoutchouc, for the purpose, we suppose, of making the blacking in a degree waterproof. The manner of making the solution of India rubber for this purpose, is described in nearly the following words:

The India-rubber oil which is used, consists of about eighteen ounces of the caoutchouc, a little more or less, according to the quality of the India rubber, which is dissolved in nine pounds of rape oil, by heat; take

this solution, and add to it sixty pounds, by weight, of fine ivory black and forty-five pounds of molasses, add to these one pound of finely pulverised gum arabic, dissolved in twenty gallons of vinegar; the No. 24 vinegar is to be preferred.

The above ingredients are to be carefully mixed and ground in a mill, adapted for the purpose, until the mixture becomes perfectly smooth; twelve pounds of sulphuric acid is then added, in small quantities at a time, and the whole is stirred briskly for half an hour.

The blacking thus produced is allowed to stand fourteen days, it being stirred for half an hour every day: three pounds of finely pounded gum arabic is then added, and the stirring is kept on for half an hour each day, for fourteen days longer, when the liquid blacking will be fit for use.

For making the paste blacking, the Patentees first take a quantity of the India-rubber oil, consisting of the same ingredients, and mixed in the same proportions as that above described, and add to it sixty pounds, by weight, of fine ivory black, with about fortyfive pounds of molasses, and a quantity of very finely powdered gum arabic, which must be dissolved in twelve pounds of vinegar, of the No. 24 strength; no specific quantity of gum arabic being mentioned, we presume the Patentees intend one pound to be used; thus making the difference in the liquid and paste blacking only to consist in the quantity of vinegar.

When the gum arabic is added, the whole of the ingredients are to be well mixed and ground in a mill, until the paste becomes perfectly smooth; after which, add gradually, and in small quantities at a time, twelve pounds of sulphuric acid, care being taken that the mixture is briskly stirred, during the operation of pour

ing in the acid, and for about half an hour after the whole of the acid has been added; this mixture will be found fit for use in about seven days.-[Inrolled in the Inrolment Office, February, 1837.]

To JEAN MARIE ETIENNE ARDIT, of Newman-street, Oxford-street, in the county of Middlesex, printer, in consequence of a communication made to him by a certain foreigner residing abroad, for a machine or apparatus for drawing, and for copying and reducing drawings and other objects or subjects, and for taking panoramas.-[Sealed 10th August, 1831.]

THIS invention relates to an instrument employed for drawing perspective by mechanical means, called a diagraphe. The instrument is placed on a table, and the eye of the artist being applied to a certain part of the instrument, he views from thence the object intended to be drawn; and by means of a string passed over pulleys, moves a bead or a point over the apparent outlines of the object, by which means a pencil below is made to trace the same form upon a sheet of paper laid flat upon the table. The subject of the present patent, is an improvement upon the ordinary diagraphe; but it is so very obscurely described in the specification, though at considerable length, that we confess our inability to comprehend in what the invention consists, any further than in adapting an upright rod to the original instrument, for some undescribed purpose.

The claim set out at the end of the specification, is in the following words :

"Having now described the nature and construction of the invention, communicated to me from abroad, I

would have it understood, that I lay no claim to any parts that have been before known and in use; but I de claim the adaptation of the rod u, v, to the common diagraphe, as above described; and I further claim the arrangement of such parts as have not been heretofore used for drawing panoramas;" but which these parts are, and in what manner the machine or apparatus is used for that purpose, the Patentee does not inform us. -[Inrolled in the Inrolment Office, October, 1831.]

TO WILLIAM BINGHAM, of St. Mary Hall, in the city of Oxford, Esq., and WILLIAM DUPE, of the same city, gun-maker, for their invention of certain improvements in fire-arms of different descriptions.-[Sealed 24th September, 1831.]

THIS improvement is described as applicable to muskets, fowling-pieces, pistols, and other fire-arms; its leading feature, or "principle," as the Patentees describe it, being that of firing the piece by percussion at the back of the breech. This " principle," if such we may call it, is not new, as most of readers are aware; (see Cook's patent, in our First Series, vol. ix. p. 297; Davis's patent, vol. xii. p. 251; Newmarch's patent, vol. xiv. p. 76; and several others subsequently ;) and as to the mechanism of the lock, that appears to possess as little novelty.

The Patentees, after claiming the principle of firing by percussion, behind the breech, have enumerated the points of detail which they claim, under eight distinct heads :-First, countersinking the screw holes of the lock plate; second, the adaptation of a straight main spring; third, forming the trigger of one piece with the

seear; fourth, forming the hammer of one piece with the tumbler; fifth, placing the nipple at the back of the breech; sixth, firing behind, by a peculiarly formed breech; seventh, the enclosing the cock within a metal box or chamber; and eighth, the metal chamber or case.

These are the points which are considered by the Patentees to be new; they may be adapted to any kind of hand fire-arms; and, provided the lock, with the nipple, be enclosed within a metal box or case, the butt and the stock may be of any shape, and of wood or other material, as may be thought proper.-[Inrolled in the Inrolment Office, March, 1832.]

TO WILLIAM HALE, of Colchester, in the county of Essex, machinist, for his invention of improvements in machinery or apparatus for propelling vessels, which improvements are also applicable for raising or forcing fluids. [Sealed 13th October, 1831.]

THE subject of this patent appears to be a modification of the mode of propelling vessels on water, for which a patent was granted to Mr. Hale, dated 12th January, 1830. (See vol. ii. of our present Series, p. 22.) It consists in mounting a revolving propeller in an excentric position, within a box or case, the sides of which continually diverge, thus forming a convolute curve. The water is allowed to flow into this case through a central aperture formed round the axle of the propeller; and by the rotation of the excentric propeller, the water is expelled through a passage formed as a tangent to the box or case which is placed at the stern of the

« iepriekšējāTurpināt »