IMPROVEMENTS IN ADDADATHERS FOR VOWLY AM
Year: 1859

page_text: LETTERS PATENT to James Dible, of Northam, in the County of Hants,
Shipwright, and William Henry Graveley, of Upper East Smithfield, in
the County of Middlesex, Engineer, for the Invention of "IMPROVEMENTS
IN ADDADATHERS FOR VOWLY AMINO
Sealed the 11th January 1860, and dated the 11th July 1859.
PROVISIONAL SPECIFICATION left by the said James Dible and William
Henry Graveley at the Office of the Commissioners of Patents, with
their Petition, on the 11th July 1859.
We, JAMES DIBLE, of Northam, in the County of Hants, Shipwright, and
WILLIAM HENRY GRAVELEY, of Upper East Smithfield, in the County of
Middlesex, Engineer, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN APPARATUSES FOR VENTILATING AND LIGHTING SHIPS," to be as
follows:
This Invention refers chiefly to improvements upon an Invention of James
Dible, patented the 2nd November 1852, No. 612, but is applicable to other
ventilating apparatus where a shaft rising above deck is used. The present
Invention consists in surrounding the shaft, from the deck. to say, from one to
five feet, more or less, with a case with a glazed top capable of being raised
upwards from the upper edge of the case, for the purpose of allowing the escape

page_text: of foul and vitiated air, while the glass in the top allows of light entering
between decks. We fit a valve in the interior of the shaft and provide an
india-rubber or other like suitable seat in order to prevent the ingress of the
sea in heavy weather; over the seat we fit a plug to draw off any water
that may rest on the valve.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said James Dible and William Henry Graveley in the Great
Seal Patent Office on the 11th January 1860.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JAMES
DIBLE, of Northam, in the County of Hants, Shipwright, and WILLIAM HENRY
GRAVELEY, of Upper East Smithfield, in the County of Middlesex, Engineer,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eleventh day of July, in the year of our Lord
One thousand eight hundred and fifty-nine, in the twenty-third year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us, the
said James Dible and William Henry Graveley, Her special licence that we, the
said James Dible and William Henry Graveley, our executors, administrators,
and assigns, or such others as we, the said James Dible and William Henry
Graveley, our 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 APPARATUSES
FOR VENTILATING AND LIGHTING SHIPS," upon the condition (amongst others)
that we, the said James Dible and William Henry Graveley, or one of
us, our executors or administrators, by an instrument in writing under our or
one of our, or their or one of their hands and seals, 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 we, the said James Dible and William Henry
Graveley, do hereby declare the nature of our said Invention, and in what
manner the same is to be performed, to be particularly described and ascertained

page_text: in and by the following statement thereof, reference being had to the Drawings
hereunto annexed, that is to say :-
This Invention refers chiefly to improvements upon an Invention of James
Dible, patented the 2nd November 1852, No. 612, but is applicable to other
ventilating apparatus where a shaft rising above deck is used. The present
Invention consists in surrounding the shaft from the deck to, say, from one to
five feet, more or less, with a case with a glazed top capable of being raised
upwards from the upper edge of the case, for the purpose of allowing the escape
of foul and vitiated air, while the glass in the top allows of light entering between
decks. We fit a valve in the interior of the shaft, and provide an india-rubber
or other like suitable scat in order to prevent the ingress of the sea in heavy
weather; over the seat we fit a plug to draw off any water that may rest on
the valve.
Figure 1 of the accompanying Drawings is an external elevation, and
Figure 2 is a longitudinal section, of a ventilating apparatus constructed
according to our Invention. A is a pipe for conducting fresh air from above
the deck to the interior of the vessel. The upper part of this pipe is flanged
to support a bell mouth B, which is loose and free to revolve on the upper
part of the pipe A, in order that the mouth may be constantly kept "head to
wind." Pipes, one only of which is shewn in the Drawing, may be fitted to the
pipe A for conveying fresh air to any part of the vessel. C is a casing which
is bolted to the deck C', and surrounds or partially surrounds for a certain
distance the pipe A. This case C is covered by a cap D, which is provided
with a glazed top a, a, to admit light to the interior of the vessel through the
passages b, b, between the pipe A and the case C. The sides of the cap D
work in sockets c, c, to admit of the cap being raised or lowered. When the
cap D is raised there is a passage for the escape of vitiated air from the interior
of the vessel to the atmosphere, as indicated by the arrows. E is a valve
fitted to the lower part of the pipe A, which is closed to exclude air when
necessary, and also to prevent the ingress of the sea during rough weather. F
is a plug to draw off any water that may rest on the valve.
For yachts and small vessels we sometimes make the bell mouth to fold, and
construct it as shewn in side elevation at Figure 3. a, a, are rings or frames
fitted in a socket b to a collar c; these rings are supported and kept in
position by a tie rod d, and the whole is covered with india-rubber, canvas, or
other suitable material. When the bell mouth is not required the tie rod d
is removed, and the rings are folded down, as shewn at Figure 4.
And having now described the nature of our said Invention, and in what

page_text: manner the same is to be performed, we declare that we claim the
construction of ventilating apparatuses for ships by surrounding the venti-
Jating shaft with a case, in manner and for the purposes herein-before
.described.
In witness whereof, I, the said William Henry Graveley, for myself,
and on behalf of the said James Dible, have hereunto set my hand
and seal, this Eleventh day of January One thousand eight hundred
and sixty.
W. H. GRAVELEY. (L.S.)