IM- IN LOCOMOTIVE AND OTHER STEAM BOILERS HAVING FIRE- PROVEMENTS
Year: 1870

page_text: LETTERS PATENT to Stanhope Perkins, of Gorton, near Manchester,
in the County of Lancaster, Engineer, for the Invention of "IM-
IN LOCOMOTIVE AND OTHER STEAM BOILERS HAVING FIRE-
PROVEMENTS
"
BOXES.
Sealed the 2nd September 1870, and dated the 18th March 1870.
PROVISIONAL SPECIFICATION left by the said Stanhope Perkins at
the Office of the Commissioners of Patents, with his Petition, on
the 18th March 1870.
I, STANHOPE PERKINS, of Gorton, near Manchester, in the County of
Lancaster, Engineer, do hereby declare the nature of the said Invention
for IMPROVEMENTS IN LOCOMOTIVE AND OTHER STEAM BOILERS HAVING FIRE-
BOXES," to be as follows:-
In ordinary locomotive and other fire-box steam boilers, the joint
round the fire door is formed by a solid ring to which the inside and
outside plates are rivetted. The large mass of metal in the solid ring
cannot be kept sufficiently cool by the water, and it is rapidly burnt

page_text: away, and is destroyed by the action of the rakes or tools used by the
firemam, so that frequent and expensive. repairs are required, leaving
the fire-box in patched condition.
The object of my Invention is to remove these defects by an improved
form, construction, and mode of securing the water space ring of the
fire door which will allow a free circulation of water closer to the surface
of the interior plates than in the ordinary boiler, and my improvements
consist in making the ring somewhat like a U in cross section with a
hip. round the inner edge to protect the edges of the plates which are
secured to the ring against the action of the fireman's tools and in secu-
ring the ring and plates together by stays which screw through the
flanges of the ring, both ends. being, rivetted in countersunk holes
formed in the plates.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Stanhope Perkins in the Great Scal Patent Office
on the 10th September 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, STANHOPE.
PERKINS, of Gorton, near Manchester, in the County of Lancaster,
Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Eighteenth day of March, in the year
of our Lord One thousand eight hundred and seventy, in the thirty-third
year of Her reign, did, for Herself, Her heirs, and successors, give
and grant unto me, the said Stanhope Perkins, Her special licence that
I, the said Stanhope Perkins, my executors, administrators, and assigns,
or such others as I, the said Stanhope Perkins, my executors, administra-
tors, and assigns, should at any time agree with, and no others, from time
to 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 LOCOMOTIVE AND OTHER STEAM BOILERS HAVING FIRE-
BOXES," upon the condition (amongst others) that I, the said Stanhope
Ferkins, by an instrument in writing under my hand and seal, should

page_text: 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 Scal Patent Office within six calendar months next
and immediately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Stanhope Perkins, 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 and the accompanying Drawings (that is to
say) :—
In ordinary locomotives and other fire-box steam boilers the joint
round the fire door is formed by a solid ring to which the inside and
outside plates are rivetted. The large mass of metal in the solid ring
cannot be kept sufficiently cool by the water, and it is rapidly burnt
and is destroyed by the action of the rakes or tools used by the fire-
man, so that frequent and expensive repairs are required, leaving the
fire-box in a patched condition.
The object of my Invention is to remove these defects by an improved
form, construction, and mode of securing the water space ring of the
fire door which will allow a free circulation of water closer to the surface
of the interior plates than in the ordinary boiler, and my improvements
consist in making the ring somewhat like a U in cross section with a
lip round the inner edge to protect the edges of the plates which are
secured to the ring against the action of the fireman's tools, and in
securing the ring and plates together by stays which screw through
the flanges of the ring, both ends being rivetted in countersunk holes
formed in the plates.
My improvements are illustrated by Figure 1 an edge, and Figure 2
a front view, of the ring detached, and by Figure 3 a section, shewing
the mode of connecting the ring and plates of the boiler and fire-
box.
a represents the ring forming the joint round the fire door; b is the
plate at the outside of the boiler; c, the copper plate forming the fire-
box, the edge of which plate is protected by the lip upon the ring.
as shewn; d, are the copper stays screwed in and then rivetted as
chann

page_text: I have now particularly described the nature of my Invention and
the mode of carrying it into effect, and claim as my Invention the
mode of constructing and securing the ring forming the joint round.
the fire door of locomotive and other fire-box boilers, substantially as
herein-before described and illustrated by the Drawings.
In witness whereof, I, the said Stanhope Perkins, have hereunto set
my hand and scal, this Ninth day of September, in the year of
our Lord One thousand eight hundred and seventy.