CERTAIN IMPROVEMENTS IN BLOWING AND EXHAUSTING AIR APPLICABLE TO VARIOUS PURPOSES
Year: 1832

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JACOB
PERKINS, of Fleet Street, in the City of London, Engineer, send greeting.
WHEREAS His present most Excellent Majesty King William the Fourth,
by His Letters Patent under the Great Seal of Great Britain, bearing date
at Westminster, the Ninth day of June, in the second year of His reign,
did, for Himself, His heirs and successors, give and grant unto me, the
said Jacob Perkins, His especial licence, full power, sole privilege and
authority, that I, the said Jacob Perkins, my exors, adñors, and assigns,
or such others as I, the said Jacob Perkins, my exors, adññors, or assigns,
should at any time agree with, and no others, from time to time and at
all times during the term of years therein expressed, should and lawfully
might make, use, exercise, and vend, within England, Wales, and the Town
of Berwick-upon-Tweed, my Invention of "CERTAIN IMPROVEMENTS IN BLOWING
AND EXHAUSTING AIR APPLICABLE TO VARIOUS PURPOSES;" in which said Letters
Patent is contained a proviso that I, the said Jacob Perkins, shall cause a
particular description of the nature of my said Invention, and in what manner
the same is to be performed, to be inrolled in His said Majesty's High
Court of Chancery within six calendar months next and immediately after
the date of the said in part recited Letters Patent, as in and by the same
reference being thereunto had, will more fully and at large appear.

page_text: NOW KNOW YE, that in compliance with the said proviso, I, the said
Jacob Perkins, do hereby declare that the nature of my said, Invention, and
the manner in which the same is to be performed, are fully described and
ascertained in and by the following description thereof, reference being had to
the Drawing hereunto annexed, and to the figures and letters marked thereon,
that is to say:--
My Invention consists of a certain mechanical arrangement, and thus
producing an apparatus to be used for blowing or exhausting air for various
useful purposes, as will be fully described hereafter, and by such mechanical
arrangement or apparatus a very regular blast of air may be obtained, and also,
when used as an exhausting apparatus, a very regular withdrawing of the air
will be produced.
In order that the Invention may be fully understood and carried into effect,
I will describe the Drawing hereunto annexed and the figures and letters
marked thereon.
DESCRIPTION OF THE DRAWING.
Fig. 1 represents a section of the apparatus; Fig. 2 is a plan of the under
side of Fig. 1, taken apart at the flanches; and Fig. 3 shows a plan of the
revolving vanes or blowers separately. In each of these Figures the same
letters indicate similar parts; a being the outer casing; b, b, the vanes of the
revolving blower. These vanes consist of plates 6 affixed at right angles to the
shaft c.
In Figure 3 there are four vanes shewn, but I do not confine myself
to that number, as more or less may be used. It will be seen in Figure 1 that
these vanes are shaped off to an angle at their outer ends.. These vanes are
caused to revolve rapidly by means of the pulley d affixed on the shaft or
Above the vanes is fixed by rods to the outer casing the conical case
or shield e, by which the airway above the vanes is stopped, except between
the outer edges of the conical case or shield e and the outer casing b, as is
shewn by the arrows in the passage f all around the conical case. The air
enters at the openings 9 at the centre of the apparatus, and is forced out at
the pipe h, as is indicated by the arrows in Figure 1. The shaft or axis c
turns in bearings i, j, that at i being formed through the bottom plate of the
apparatus, as is clearly shewn in the Drawing, and that at j is formed on to the
under side of the conical case or shield, as is also shewn in Figure 1.
axis c.
Having described the various parts of my Invention, and the manner of
combining the same, I will now describe the manner of using the same.
I will first suppose it is intended to be used as a blowing apparatus for a blast
furnace or for other purposes. The pipe h will be properly connected to the

page_text: By this
furnace, and a rapid révolving action communicated to the vanes by applying
a strap or band to the pulley d, actuated by any first mover, or the same may be
effected by means of millwork in place of the pulley and strap.
means a rapid motion being obtained to the vanes b, b, the air as it enters at
the openings at g will be forced outwards by the centrifugal force of the vane,
and the base of the conical case acts as a shield to prevent the air passing from
the vanes till it arrives at the outer ends thereof, and thus will a considerable
force be obtained to the air, and the same will be forced through the eduction
pipe h, as will be readily understood, and be readily constructed to various pur-
poses of blowing apparatus. In some cases in place of blowing air into a
furnace to excite the fire, it is desirable to withdraw the air, &c. therefrom,
and thus to produce a current of fresh air at all times to rush into the fire to
obtain a more violent combustion. When my apparatus is to be applied to
such purposes, the flue from the furnace or fireplace is to be connected to the
under part of the apparatus at the openings g, and thus it will be evident that
when a quick revolution is given to the vanes or blower, the air, after having
produced its effect on the fuel, and become no longer effective in aiding com-
bustion, will be set in motion by the vanes and forced out at the eduction
pipe h, whilst a continued and equal current of fresh air will be rushing in to
excite the combustion of the fuel, and the quantity of such current will depend
on the velocity of the motion communicated to the vanes, consequently the same
may be varied and regulated at pleasure.
Having now described the nature and action of my Invention, and the
manner of carrying the same into effect, I would have it understood, that I am
aware that a revolving shaft having vanes similar to those above described,
have been before used in blowing machines. I do not therefore lay any
claim to that part of the apparatus separately as part of my Invention,
but only claim the same when in combination with the other parts of
apparatus.
But what I claim as my Invention is, a mechanical arrangement or
apparatus consisting of the revolving vanes or blower b (placed in a case a);
such vanes having a shield to prevent the passage of the air upwards till it
arrives at the outer ends of the vanes and by the centrifugal action, and has
obtained considerable force, as above described.
In witness whereof, I, the said Jacob Perkins, have hereunto set my
hand and seal, this Third day of December, in the year of our Lord
One thousand eight hundred and thirty-two.
JACOB (L.S.) PERKINS.

page_text: AND BE IT REMEMBERED, that on the Third day of December, in
the year of our Lord 1832, the aforesaid Jacob Perkins came before our said
Lord the King in His Chancery, and acknowledged the Specification afore-
said, and all and every thing therein contained and specified, in form above
written. And also the Specification aforesaid was stamped according to the
tenor of the Statute made for that purpose.
Inrolled the Eighth day of December, in the year of our Lord One
thousand eight hundred and thirty-two.