IMPROVEMENTS IN CONSTRUCTING AND ARRANGING SMOKE AND AID Trung
Year: 1856

page_text: LETTERS PATENT to David Ogilvy Boyd, of 78, Welbeck Street, in the
County of Middlesex, for the Invention of "IMPROVEMENTS IN CONSTRUCTING
AND ARRANGING SMOKE AND AID Trung "*
Sealed the 24th March 1857, and dated the 3rd October 1856.
PROVISIONAL SPECIFICATION left by the said David Ogilvy Boyd at the
Office of the Commissioners of Patents, with his Petition, on the 3rd
October 1856.
I, DAVID OGILVY BOYD, of 78, Welbeck Street, in the County of Middlesex,
do hereby declare the nature of the Invention for "IMPROVEMENTS IN CON-
STRUCTING AND ARRANGING SMOKE-AND-AIR FLUES," to be as follows:
This Invention has for its object an improved method of arranging air flues,
to supply fresh air to or withdraw vitiated air from each of the rooms of a
house, and; as regards the withdrawal of the vitiated air, to obtain for each
room a separate ventilating flue; without necessarily increasing the bulk of a
chimney stack, or decreasing the size of ordinary smoke flues, as heretofore
constructed, by forming the partitions between the several smoke flues therein
of hollow bricks of clay, iron; or other material, in lieu of solid clay bricks, in
such a manner, that when laid one upon another in building the partitions the
passages in the bricks range, so as to form air flues between the several smoke
flues.
This Invention also consists in the use of plates of clay, iron, or other.

page_text: material, to be built one upon the other, so that two tiers of such plates placed
side by side at any desired distance apart shall form two sides of a ventilating
flue, and also each one side of two smoke flues; and these plates of clay, iron,
or other material are to have projections, to build between the joints of the
brick or stonework of the chimney stack, and forin ties to the same.
And this Invention further consists in the use of plates, with or without
projections, to be built up, as above described, with the brick or stone work of
a chimney stack, the sides of such bricks or stones to be made with grooves to
receive the edges of such plates.
And this Invention also consists in the use of hollow iron bricks having
passages through them, and also of iron plates for forming, as above described,
air or smoke flues or passages.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said David Ogilvy Boyd in the Great Seal Patent Office on the
3rd April 1857.
TO ALL TO WHOM THESE PRESENTS' SHALL COME, I, DAVID
OGILVY BOYD, of 78, Welbeck Street, in the County of Middlesex, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Third day of October, in the year of our Lord One
thousand eight hundred and fifty-six, in the twentieth year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
David Ogilvy Boyd, Her special licence that I, the said. David Ogilvy Boyd,
my executors, administrators, and assigns, or such others as I, the said David
Ogilvy Boyd, 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 CONSTRUCTING.
AND ARRANGING SMOKE AND AIR FLUES," upon the condition (amongst others) that.
I, the said David Ogilvy Boyd, my executors or administrators, by an instru-
ment in writing under my, or their, or one of their bands 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..

page_text: NOW KNOW YE, that I, the said David Ogilvy Boyd, do hereby declare
the nature of the said Invention, and in what manner the same is to be .
performed, to be particularly described and ascertained in and by the following
statement thereof, that is to say:-
The object of my Invention is to facilitate the construction of air flues or
passages to supply fresh air to and withdraw vitiated air from the several
rooms of houses. For these purposes, in place of separating the different flues
of a stack by means of solid partitions of brick or other material, I form such
partitions of hollow bricks of clay, iron, or other material, laid one upon the
range from
other in building the partitions, so that the passages in the bricks
top to bottom of the parts of the two flues which they divide.
!
Figures 1 shew an iron brick of the description which I use for this
purpose; it is furnished with wings a, a, which build into the joints of the
brickwork, and it also has at one end a socket 6 for receiving the opposite
end of another similar brick. Figure 2 is a perspective view, shewing the
way in which the hollow bricks are built in with the brickwork to form a
partition between flues. Figure 3 is a similar view of an inclined flue. In
place of employing hollow bricks to form air flues between smoke flues, as above
described, I sometimes employ plates of clay, iron, or other material, which I
build into the front and back walls of the stack, and I use two tiers of plates
to form each partition, and the interval between the two tiers forms the air flue."
Figures 4 show an iron plate such as I use for this purpose. c, c, are wings,
similar to the wings a, a, Figure 1; and d is a socket, formed of its ends by
pieces cast on the two sides of the plate to receive the other end of the next
plate. Figure 5 is a perspective view, shewing the way in which these plates
are built in with brickwork to form the partition between two smoke flues.
Figure 6 is a similar view, shewing the plates applied to an inclined flue.
Figures 7 shew another method of constructing a plate to be used for this
purpose; it is very similar to the plate shewn at Figures 4, but it differs from
it in being made in two parts, one of which consists of the body of the plate,
and the other of the socket and wings. Figures 8 and 9 shew perspective
views of plates of this description built in with brickwork to form a partition
between two smoke flues, as before described.
I would here remark that I have described the hollow bricks and the plates
5 herein-before mentioned as being constructed of iron, because this is the
material which I prefer to employ, but clay or other material may be sub-
stituted therefor without departing from my Invention. Figure 10 shews a
perspective view of a ventilating flue, forming a separation between two smoke
flues, in which plain plates are used in place of plates having wings and sockets

page_text: like those before'described; in this case the bricks or stones, of, which the stack
is built, have grooves formed in them at e, e, e, 'e, into which the clay or earthen-
ware plates ff, fit, as is shewn by the Drawing The connections between
the air flues and the rooms to be ventilated are formed by pipes or passages,
which are conducted to apertures in the ceilings and skirtings, or elsewhere, as
when ventilating flues or passages have heretofore been employed.
I would remark, that although I have described the passage formed in the
partition between'. two flues as being an air fluc, yet it may sometimes with
advantage be converted into a smoke flue, as when the stack of flues was
originally constructed for a smaller number of smoke flues than that afterwards
required.
In witness whereof, I, the said David Ogilvy Boyd, have hereunto set
my hand and seal, this Third day of April, in the year of our Lord
One thousand eight hundred and fifty-seven.
Witness,
S. CARPMAEL.
"
7
DAVID OGILVY BOYD. (L.S.)"
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