AN IMPROVED VENTILATING APPARATUS FOR EXTRACTING OR EXHAUSTING FOUL OR HEATED AIR OR VAPOURS FROM PROVISIONAL OTHERUCH LIKEPURPO
Year: 1875

page_text: LETTERS PATENT to William Corfield, of Clifton, in the County of
Gloucester, for the Invention of "AN IMPROVED VENTILATING APPARATUS
FOR EXTRACTING OR EXHAUSTING FOUL OR HEATED AIR OR VAPOURS FROM
PROVISIONAL SPECIFICATION left by the said William Corfield at
the Office of the Commissioners of Patents; with his Petition, on
the 29th April 1875.
I, WILLIAM CORFIELD, of Clifton, in the County of Gloucester, do
"AN IMPROVED
hereby declare the nature of my said Invention for
VENTILATING APPARATUS FOR EXTRACTING OR EXHAUSTING FOUL OR HEATED AIR
OR VAPOURS FROM SHIPS, MINES, BUILDINGS, AND OTHER SUCH LIKE PURPOSES," to
be as follows:-
The Invention is designed for the purpose of extracting by suction
foul or vitiated air, gases, or vapours from closed or partially closed
receptacles or subterranean passages, such as ships' holds, coal pit

page_text: cuttings, sewers, or the like, and at the same time injecting or causing
to pass and circulate in such receptacle, capacity, or passages a stream
or current of fresh pure air, thereby enabling such place to be thoroughly
and perfectly ventilated.
The improvements consist in connecting to a portable or fixed bellows
or revolving fan at the suction thoroughfare thereof a box or receptacle
designed for containing and having fixed therein one or more inlet
valves. The connection therewith from the exterior of such box or
receptacle to the place to be ventilated is effected by means of metallic
or flexible pipes and unions, or other similar and equivalent joints. The
exhaust or discharge orifice of the said bellows or fan being so arranged
that the foul air as extracted may be discharged into a ventilated shaft
or pipe, or direct into the open air.
When it is desired to use the apparatus for the purposes of ventilating,
the suction or inlet pipe or pipes are caused to pass from the chamber or
chambers, passage or passages, place or places, to one or more of the
inlet or suction valves of the bellows or fan when it or they are con-
nected to the nozzle pipes of such valves by the unions aforesaid, the
said pipe or pipes being provided with tops or cocks for the purpose of
opening, closing, or governing their cutrance thoroughfare to the suction
valves of the bellows.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Corfield in the Great Seal Patent Office'
on the 28th October 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
CORFIELD, of No. 5, High Street, Clifton, in the County of Gloucester,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-ninth day of April, in the year
of our Lord One thousand eight hundred and seventy-five, in the
thirty-eighth year of Her reign, did, for Herself, Her heirs and succes-
sors, give and grant unto me, the said William Corfield, Her special
licence that I, the said William Corfield, my executors, administrators,

page_text: ور
and assigns, or such others as I, the said William Corfield, 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 Ireland, the
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN
VENTILATING APPARATUS FOR EXTRACTING OR EXHAUSTING FOUL OR HEATED AIR
OR VAPOURS FROM SHIPS, MINES, BUILDINGS, AND OTHER SUCH LIKE PURPOSES,'
upon the condition (amongst others) that I, the said William Corfield,
my executors or administrators, by an instrument in writing under my,
or their, or one of their hands and scals, 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 imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Corfield, do hereby declare
the nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement :-
:-
My Invention consists of a machine or a ventilating apparatus made
so as to work to and fro vertically or longitudinally, and by such action
to suck in, draw up, and discharge foul air, gas, vapour, or vitiated
atmosphere of any degree of cold, heat, or density, such as accumulates
in the holds and compartments of ships or of any floating vessels, and
from gangways, galleries, headings, and working spaces in mines,
tunnels, coal pits, and sewers, and from reservoirs, wells, vats, and
storage vessels; and from hospitals, factories, work rooms, and other
compartments of buildings; and from any place or places whatsoever
affected by vitiated atmosphere, and that have a tendency either naturally
or artificially to detain, imprison, and prevent the proper ventilation of
foul air, gas, vapour, or vitiated atmosphere, as before stated.
I propose.firstly to attach and fix a chamber, cover, box, or enclosure.
of suitable material directly under or covering or enclosing the suction
valve of a single or double-action bellows of a circular, square, or oblong
shape (or several of such bellows fixed to and drawing air from a large
pipe or chamber), such bellows being made with an extra board inside
fixed a few inches or more from the back of the suction valve board of the

page_text: bellows; thus forming a space or compartment into which the end of
the discharge pipe or pipes is inserted.
"
The aforesaid chamber, cover, box, or enclosure is formed with a
flanged rim for attaching and screwing it with screws or other efficient
fastening to the valve board of the said bellows. The said chamber,
cover, box, or enclosure has one or more holes or inlets through the
bottom or sides of same, bored and screwed, or cast on same and screwed,
or formed of wrought or cast metal, or any suitable material, on purpose
to receive and fasten the end or ends of the suction pipe, duct, or tubes,
of convenient shape, with stop-cocks or valves to regulate the same if
required, the said pipe, duct, or tubes to be securely attached and con-
nected to the inlet or inlet holes in the said chamber, cover, box, and
enclosure by a hollow screw, screw union or unions, or by wire or
ligature fastenings, so as in particular cases to be disconnected, and in
other cases fastened by solder or cement, if required to be permanently
attached or fixed thereto; such attachment or connection of the suction
pipe, duct, or tubes to the said chamber, cover, box, or enclosure is to be
governed and proportioned in all cases by the circumstances of position
and distance required to produce the complete suction, exhaustion,
extraction, and discharge of foul air, gas, vapour, and vitiated atmos-
phere from the air ways, spaces, and positions before described. The
said suction pipe, duct, and tubes are intended to be made of any
requisite length and of any adaptable material, and where necessary may
have branch or off-shoot pipe and tubing to minor compartments or.
chambers, and regulated by cocks or valves if required.
The said machine or ventilating apparatus is made of various sizes
and capacity, viz., of a portable size for temporary or occasional use, and
of a larger or stationary size when required for permanent position and
general use, in each case to be equivalent in motive power to the ratio
of the cubic content of the air in the space, ways, and places required to
be ventilated and discharged in a given time. Therefore it will be
evident that the said machine or ventilating apparatus can be pro-
portioned to the motive power which may exist in any place or district,
whether manual, animal, hydraulic, steam, or any other, and in adapting
each particular appliance, framework, gearing, and casings is intended
to be specially designed and made to suit the said machine or ventilating
apparatus.

page_text: Secondly. I propose to cover the suction holes of an ordinary
revolving fan with the said chambers, covers, boxes, and enclosures, and
to attach and fix the same to the fan case, shell, or frame thereof, and
to fit up and connect thereto suction and discharge pipe, ducts, and
tubes, somewhat similar to those details before described with respect to
my machine or ventilating apparatus of the bellows form.
Having now described the nature of my said Invention and the manner
in which the same is to be performed, I would remark in conclusion
that I do not limit myself to the precise details and configuration of
parts herein expressed and shown, as the same may obviously be varied or
modified without in any way departing from the principles on which the
Invention is based; I do not claim the bellows or the revolving fan
which has long been used for other purposes, but I claim the Invention
of the peculiar shape, position, and attachment of the said chamber,
cover, box, or enclosure, and the enclosure by it of the suction valve of
a bellows, and of the suction and draught holes of a revolving fan (or
any number or series of such machines as aforesaid, working together
from one source) in combination with an ordinary or any kind of
bellows; and in combination with a revolving fan and the attachment
thereto and use of suction and discharge pipes of any length and size to
suit the want or demands of ventilation in any position or places, sub-
stantially as herein specified.
In witness whereof, I, the said William Corfield, have hereunto
set my hand and scal, this Fourteenth day of October, in the
year of our Lord One thousand eight hundred and seventy-
five.
Witness,
JOHN EDWARD DIX,
17, Sutton Street,
York Road,
Lambeth.
WILLIAM CORFIELD. (L.S.)