Year: 1888

page_text: A communication to me from abroad by EUGENE FRANÇOIS AUGUSTE GIRAUD and
JEAN FRANÇOIS GUILLEMIN, both of Paris, in the Republic of France.
1, EDMUND EDWARDS, of the firm of Edwards and Co., Patent Agents and
Engineers, of 35, Southampton Buildings, Chancery Lane, in the County of Middlesex
do hereby declare the nature of this invention to be as follows:-
This invention relates to the tuyéres through which air under pressure is supplied
to the fire in forges used by smiths and for other purposes.
Such tuyéres as ordinarily made, are kept cool by means of a current of water
circulating round them, and the present invention has for its object a novel method of
construction by which the water is contained in the tuyére itself instead of in a pipe
or chamber surrounding it.
The improved tuyére consists of a vertical cast iron chamber, of a more or less ovoid
shape, having at its upper or larger end two curved and flattened passages directed
toward each other and serving as exits for the air into the fire. A conical socket is
formed at one side of the tuyére at or near its upper end, and receives the pipe by
which air from a bellows, fan, or other blowing device is forced through the tuyére.
A smaller opening or socket. lower down is connected with a water supply pipe
by which water is admitted into the tuyére itself and is maintained at the desired
level.
The lower or narrower end of the tuyére has an opening closed by a door secured
by bolts or other equivalent means, by removing which any cinders or dirt can be
taken away. A sufficient number of brackets are cast upon the tuyére by which
it can be readily fixed in its place.
From the shape of the tuyére described, of the openings into it and of the
water which is contained in it, the water offers a yielding resistance to the passage
of the air blast, reacting upon the latter and giving it a fresh impulse so that it

page_text: is driven from the apertures into the fire with a force sufficient to very quickly
produce the requisite heat, the more so as there can be no waste through the
conical air pipe, the water in the tuyére forming an airtight joint.
A slight vapour is produced from the water in the tuyére, and by its presence
in the blast prevents the adherence of clinker to the parts exposed to the fire ; so
that whilst the combustion of the fuel is promoted, the air openings are kept clear
and unaltered in shape and size, and the tuyére is very durable.
Dated this 6th dow of June 1888
EDWARDS & Co.,
Agents for the Applicant.
Communicated to me from abroad by EUGENE FRANÇOIS AUGUSTE GIRAUD and
JEAN FRANÇOIS GUILLEMIN, both of Paris, in the Republic of France.
I, EDMUND EDWARDS, of the firm of Edwards and Co. Patent Agents and
Engineers, of 35 Southampton Buildings, Chancery Lane, in the County of Middlesex,
do hereby declare the nature of this invention and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement :-
This invention relates to the tuyéres through which air under pressure is supplied
to the fire in forges used by smiths and for other purposes.
Such tuyéres as ordinarily made, are kept cool by means of a current of water
circulating round them, and the present invention has for its object a novel method
of construction by which the water is contained in the tuyére itself instead of in
a pipe or chamber surrounding it.
In the accompanying drawing, which is in illustration of the invention, figure 1
is a vertical section, through A, B, (figure 3); figure 2 is a vertical section
through C, D, (figure 1), and figure 3 is a plan of the improved tuyére.
The improved tuyére consists of a vertical cast iron chamber, of a more or less
ovoid shape, having at its upper or larger end two curved and flattened passages
directed toward each other and having exits at m and n for the passage of the air
into the fire. A conical socket t is formed at one side of the tuyére at or near
its upper end, and receives the pipe by which air from a bellows, fan, or other
blowing device is forced through the tuyére. A smaller opening or socket o lower

page_text: down is connected with a water supply pipe by which water is admitted into the
tuyére itself from a reservoir and is maintained at the desired level.
A
The lower or narrower end of the chamber or tuyére has an opening closed by
a door secured by bolts or other equivalent means, by which any cinders or dirt
passing into the chamber through the openings m and n can be taken away.
sufficient number of brackets p, 9 are cast upon the tuyére by which it can be
readily fixed in its place.
From the shape of the tuyéres described, of the openings into it, and of the
water which is contained in it, the water offers a yielding resistance to the
passage of the air blast, reacting upon the latter and giving it a fresh impulse so
that it is driven from the apertures m and n into the fire with a force sufficient
to very quickly produce the requisite heat, the more so as there can be no
waste through the conical air pipe, the water in the tuyére forming an air tight
joint.
A slight vapour is produced from the water in the tuyére, and by its presence
in the blast prevents the adherence of clinker to the parts exposed to the fire; so
that whilst the combustion of the fuel is promoted, the air openings are kept
clean and unaltered in shape and size, and the tuyére is very durable. The shape
and proportions of the several parts may be varied more or less to suit different
circumstances.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. In tuyéres, the chamber containing water, above which the air blast passes,
substantially as described and shewn.
2. In combination with the chamber containing water, the form and arrangement
of the orifaces through which the air blast escapes, substantially as described and
shewn.
Dated thia 18th day of Februa 1880
EDWARDS & Co.,
35, Southampton Buildings, London,
Agents for the Patentee.