IMPROVEMENTS IN STEAM BOILERS
Year: 1867

page_text: LETTERS PATENT to James Seward and Henry Smith, both of Clayton-
le-Moors, in the County of Lancaster, Engineers, for the Invention of
"IMPROVEMENTS IN STEAM BOILERS."
Sealed the 9th April 1868, and dated the 18th October 1867.
PROVISIONAL SPECIFICATION left by the said James Seward and Henry
Smith at the Office of the Commissioners of Patents, with their Petition,
on the 18th October 1867.
We, JAMES SEWARD and HENRY SMITH, both of Clayton-le-Moors, in the
County of Lancaster, Engineers, do hereby declare the nature of our said
Invention for "IMPROVEMENTS IN STEAM BOILERS," to be as follows:-
This Invention has for its object the prevention of deposit in the flues of
such boilers of particles of uncombustible matter; this we effect by means of
a series of plates fixed at intervals along the flues, the particles of
uncombustible matter being carried along the return flues and deposited in a
pit prepared at the front of the boiler (or other convenient place; to receive
the same.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said James Seward and Henry Smith in the Great Seal Patent
Office on the 15th April 1868.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JAMES
SEWARD and HENRY SMITH, both of Clayton-le-Moors, in the County of
Lancaster, Engineers, send greeting.'
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighteenth day of October, in the year of our Lord
One thousand eight hundred and sixty-seven, in the thirty-first year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us, the
said James Seward and Henry Smith, Her special licence that we, the said
James Seward and Henry Smith, our executors, administrators, and assigns,
or such others as we, the said James Seward and Henry Smith, 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 STEAM BOILERS,"
upon the condition (amongst others) that we, the said James Seward and Henry
Smith, our executors or administrators, by an instrument in writing under
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 Seward and Henry Smith,
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 in and
by the following statement, that is to say:-
This Invention has for its object the prevention of deposit in the flues of
such boilers of particles of incombustible matter; this we effect by means of
a series of plates fixed at intervals along the flues, the particles of incombustible
matter being carried along the return flues and deposited in a pit prepared
at the front of the boiler (or other convenient place) to receive the same.
Such being the nature and object of this our Invention we will now proceed
fully to describe the same, and in order that it may be clearly understood
we have hereunto annexed a Sheet of Drawings illustrative thereof and have
marked them with figures and letters of reference.

page_text: At Fig. 1 is shewn end view of boiler, partly in section, with our improve-
ments attached; Fig. 2 is a longitudinal vertical section. At A is shewn
fire-bars and bridge which are of the ordinary construction; B, B, are
plates fixed in the flues at intervals, the beated gases and particles of
incombustible matter arising from the fuel impinges or strikes these plates and
rebounding therefrom passes through or under the arc of the plates (as shewn
by the arrows) causing an undulatory motion of the draught in the flues, and
carrying the particles of incombustible matter to the pit C, in which they are
deposited; the plates have an opening or a number of openings at or near the
top of the flues through which a portion of the flame passes and prevents the
soot from adhering to the boiler plates, the plate D acting as a trap, the
draught passing over this plate in the direction shewn by the arrow d to the
side flues, at E is shewn entrance to the pit for the removal of the ashes.
It will be evident by this arrangement that we retain a greater portion of
the heated gases, and by preventing deposit in the flues effect a considerable
saving of fuel; although we have shewn in the Drawings the pit for the
reception of incombustible matter in front of the boiler, the same may be
constructed at the side thereof or at the point or place most convenient.
Having thus fully described the nature and particulars of this our said Inven-
tion, together with the manner in which the same is to be or may be performed
or carried into practical effect, we would remark in conclusion that we claim,-
Firstly. The construction, use, and employment of the plates B as shewn
and described.
Secondly. The construction, use, and employment of the plates B and the
pit C in connection and combination therewith as and for the purpose herein
described and illustrated in the Drawings or any mere modification thereof.
In witness whereof, we, the said James Seward and Henry Smith, have
hereunto set our hands and seals, this Thirteenth day of April, in
the year of our Lord One thousand eight hundred and sixty-eight.
Witness,
JAMES SEWARD. (L.S.)
HENRY SMITH.
(L.8.)
WILLIAM HARRISON, J. P.,
Co. Lancaster,
of Samlesbury Hall, near Blackburn.