List of Patents for Inventions, &c.

(Continued from Vol. VI. Page 456.)

RICHARD JUBB, of Bridge-row, in the parish of St.

George, Hanover-square, in the county of Middlesex, Whitesmith; for improvements in making and tuning the musical instrument called the Pedal Harp; by which the half-quarter note is produced thereon with peculiar sweetness and harmony; and the farther addition of an harmonic stop made thereto; and also certain improvements in tuning the violin and other stringed instruments. Dated April 5, 1805.

BARRODALL ROBERT DODD, of Change-alley, in the city of London, Civil Engineer; for various improvements in the construction of fire-places, and adapting stoves and grates thereto. Dated April 18, 1805.

JOSEPH BRAMAH, of Pimlico, in the county of Middlesex, Engineer; for sundry improvements in the art of making paper. Dated April 25, 1805.

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THOMAS ROWNTREE, of the parish of Christ Church, in the county of Surrey, Engine-maker; for an axletree and box for carriages on an improved plan. Dated April 25, 1805.

CHARLES HOBSON, of Sheffield, in the county of York, Plater, and CHARLES SILVESTER, of the same place, Chemist; for a method of manufacturing the metal called zinc into wire, and into vessels and utensils for culinary and other purposes. Dated April 29, 1805.

Specification of the Patent granted to JONATHAN HORNBLOWER, of the Borough of Penryn, in the County of Cornwall, Engineer; for a new-invented Steam Wheel or Engine, for raising Water, and for various other useful Purposes in Arts and Manufactures.

To all

Dated March 26, 1805.

With a Plate.

O all to whom these presents shall come, &c.. Now KNOW YE, that in compliance with the said proviso, I the said Jonathan Hornblower do declare, that the following is a description of my said invention, both in respect to its principles and also the way and manner in which the same is to be performed, and rendered prac tically useful; that is to say

First. In respect to principles, I cause the steam to pass from boilers, of any ordinary construction, into steam-vessels, so particularly contrived and disposed as to produce an immediate circular motion round an axis, and thereby communicate a rotary motion also to other parts that may be appended to, or connected with, the VOL. VII.-SECOND SERIES. M

ma

machines, without the intervention of wheel-work, and other complicated machinery, which has hitherto been found necessary, 'where motions that are rotative are produced by means of such as are rectilinear and interchangeable.

Secondly. I cause the steam to operate on certain moveable parts, so connected with an axle within the aforesaid vessel that they occasionally, and alternately, present unequal areas to the action of the steam; by which means the counterbalance or equipoise, which would otherwise exist on opposite sides of the axis, is done away.

Thirdly. The moveable parts which compose the said unequal areas do successively form a partition, thereby constituting two several apartments in the said steam vessels, so that in the act of their interchanges a continuous circular motion is produced without suffering any communication to exist between the aforesaid two apart

ments.

Fourthly. The steam vessel is so constructed as for one of its apartments to receive a constant supply of steam from the boiler, whilst the other apartment communicates uninterruptedly with the condensing apparatus.

Lastly. From the practical application of the aforesaid principles (as hereinafter more particularly set forth), I obviate all those inconveniences attendant on such steamengines as are retarded in their operations from vis inertiæ as often as the direction of their motions are reversed, or such as require fly-wheels, of a magnitude so enormous as to occasion a vast absorption of power. And in order for the better comprehension and understanding how the aforesaid principles may be reduced to practical use, I do hereby farther declare, that although I vary my modes of construction, as a difference in cir

cumstances may offer, to produce the same effect, and obtain the main purpose intended; yet I principally adhere to the following method, as being fully answerable to what is required, and as best calculated to be understood from a description of the same, that is to say :

First. The vessel in which the steam operates is made of cast-iron, extremely resembling a globe, flattened at its poles, see Fig 1, (Plate IV.) which shews one of its sides, the other being similar to it. Fig. 3 is a representation of the parts of the machine which move roundwithin the steam-vessel as already generally expressed, and these I call vanes. And Fig. 2 represents the interior of Fig. 1, with its lid removed. The pipe A, at Fig. 1, receives the steam from the boiler, to which is connected a valve-box, of any usual construction, by which to regulate the admission of steam. At B the eduction pipe is connected, leading from the upper apartment to the condensing apparatus, and turning in such a direction as may be most convenient for the dischargingpump to be wrought by means of an arbor, turned by the axle of the machine; on which arbor is a small flywheel, for the purpose of regulating the inequality of the crank to which the pump-rod is attached. CC is a square plate of metal, cast with the lower part of the steam vessel; by which means the whole is fastened down at the corners to the flooring of the house with iron bolts. DD is a middle part of the steam vessel, furnished with flanches, for the purpose of screwing it to EE, apd also for receiving the lid F; by which means the partition within is secured to its place in the middle of the machine, and the lid may easily be removed for the pose of rectifying and repairing the internal structure. G is the square part of one end of the axis of the machine, over which is placed a gland II, divided into parts, in

M 2

pur

order

order that it may be put on over the square, and properly embrace the round part of the axis. Within this

and is a stuffing-box, for the purpose of keeping the axie both air and steam tight. In one side of the lower apartment of the steam vessel is a small opening (secured by a lid), for the purpose of cleaning that part of the machine.

Fig. 2 represents the partition within the steam vessel, which may be made either of brass or iron, or of both those metals combined. BB is the lower flanch, the upper parts being taken away. CC are the two openings or passages for the vanes: these I call vane-ports; and, to obtain a proper idea of their figure, it must be observed, that the largest vane-port is formed by the exterior portions of two cones zz, and at yy, by a portion of the concave part of a sphere. The extent of this pas sage throughout must at least be equal to ninety degrees of a circle, and the vanes of a sufficient width, so that two of them may always make their entrance into the vane-ports before the other two make their exit. The edge cc may therefore be supposed to descend into the lower apartment one half of their depth, and to rise the other half to meet the eye; but it is not necessary that z z be so deep all the way as yy, but converge towards the centre of the machine. This is the ascending vane-port; the descending one is included between D D, which are rabbets or seatings for receiving a packing, hereinafter farther described; and rr represents a rising edge, są as to obtain a depth at least equal to the thickness of the vanes; one half of which edging is below and the other half above the main axis. These edges receive two metal plates, fixed down with screws on them, for the purpose of confining the packing, The part E is also formed spherically, and is provided with a packing

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groove,