IMPROVEMENTS IN MACHINERY OR APPARATUS FOR BLOWING AND EXHAUSTING AIR
Year: 1862

page_text: LETTERS, PATENT to John Petrie, junior, of Rochdale, in the County
of Lancaster, Ironmonger, for the Invention of "IMPROVEMENTS IN
Sealed the 25th September 1862, and dated the 10th April 1862.
.PROVISIONAL SPECIFICATION left by the said John Petrie at the
Office of the Commissioners of Patents, with his Petition, on the 10th
April 1862.
I, JOHN PETRIE, junior, of Rochdale, in the County of Lancaster, Iron-
monger, do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN MACHINERY OR APPARATUS FOR BLOWING AND EXHAUSTING AIR," to be as
follows:-
:
In my improved arrangement I employ a revolving fan provided with
blades, which are set at an angle so as to throw off the air in the direction of
the axis, after which it passes to a conical or other shaped chamber provided
with partitions, so as to form a number of compartments. These chambers
may be stationary, but I also propose to cause them to revolve.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Petrie in the Great Seal Patent Office on the 10th
October 1862.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
PETRIE, of Rochdale, in the County of Lancaster, Ironmonger, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Tenth day of April, in the year of our Lord
One thousand eight hundred and sixty-two, in the twenty-fifth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said John Petrie, Her special license, that I,. the said John Petrie,
my executors, administrators, and assigns, or such others as 1, the said
John Petrie, my executors, administrators, and assigns, should at any time.
agree with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make, use,
exercise, and vend, within the United Kingdom of Great Britain and Ire-
land, the Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS
IN MACHINERY OR APPARATUS FOR BLOWING AND EXHAUSTING AIR," upon the
condition (amongst others) that I, the said John Petrie, by an instrument
in writing under my hand and seal, should particularly describe and ascertain
the nature of the said Invention, and in what manner the same was to be
performed, and cause the same to be filed in the Great Seal Patent Office
within six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said John Petrie, do hereby declare the
nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement and accompanying Drawings (that is to say):-
In the accompanying Drawings, Figs. 1 and 2 represent the arrangement
I employ for blowing or forcing air, Fig. 1 being an elevation in section, and
Fig. 2 a face view of one half of the fan casing, parted at the line A, B, and
looking towards the left hand. The fan casing is composed of two parts 1, 2,
the former of which is of a conical form, and contains a central boss 3, con-
stituting a bearing for the shaft 4; the other end of which is carried by
a standard 5. Upon this shaft, and within the casing 2, is mounted the
revolving fan, consisting of a series of blades 6 set at an angle, as shewn in
the Drawing. Within the casing 1, which is of a conical form, is a series of
partitions 7, and extending radially from the said casing, and which serve in
addition to their chief object, hereafter to be mentioned, to carry the boss 3.

page_text: These partitions extend, as shewn in the Drawing, a part of the distance only
though the casing 1, in the direction of the axis of the fan; but there is also
another series of partitions 8, which are disposed radially, as above described,
but extending from front to back of the casing 1. The fan being caused to
revolve through the pulley 9 air will enter the orifice 10, and will be forced
forward in the direction of the axis of the fan, so as to be expelled at the
orifice 11, but in such passage it has to pass between the radial partitions 7, 8,
and is prevented thereby from being carried round by the rotation of the
blades.
The modification I use for exhausting purposes is shewn at Figs. 3 and 4,
Fig. 3 being a vertical section, and Fig. 4 a face view of that portion of the
casing containing the partitions. The two portions of the casing are at 1, 2,
the former of which, in this instance, supports one end of the shaft 4, the
other end being carried by the standard 5. The blades of the fan are at 6,
mounted as before at an angle to the axis. At 7 are the partitions, which in
this arrangement are in one series only, that is to say, they all extend the
same distance. The view, Fig. 4, is a representation of these partitions, and
the casing 1, looking towards the right hand of Fig. 3. The casing 1 of
a conical or trumpet-shape, as shewn in Fig. 3. The fan having been put
in motion air is drawn through the orifice 10, are is propelled between the
partitions 7 to the opening 11 of the casing 1, as shewn by the arrows.
Having thus described and ascertained the nature of my said Invention,
and the manner in which the same is to be performed, I desire it to be under-
stood that I claim as secured to me under the above in part recited Letters
Patent, the combination of parts shewn and described for the purposes above
set forth.
In witness whereof, I, the said John Petrie, have hereunto set my
hand and seal, this Eighth day of October, in the year of our Lord
One thousand eight hundred and sixty-two.
JOHN PETRIE, J*.
(L.B.)