IMPROVEMENTS IN STEAM BOILERS
Year: 1881

page_text: LETTERS PATENT to John Wilfred de Villemont Galwey, of Warrington, in
the County of Lancaster, Engineer, for an Invention of “IMPROVEMENTS IN
STEAM BOILERS."
PROVISIONAL SPECIFICATION left by the said John Wilfred de Villemont
Galwey at the Office of the Commissioners of Patents on the 23rd August
1881.
JOHN WILFRED DE VILLEMONT GALWEY, of Warrington, in the County of
Lancaster, Engineer. "IMPROVEMENTS IN STEAM BOILERS."
$
My Invention relates to a novel construction and arrangement of multitubular
boiler, and consists of a cylindrical shell provided with a suitable steam dome.
The lower portion of the cylindrical shell or boiler is provided with a nest of tubes
through which the gases of combustion pass from the combustion chamber. The
combustion chamber is formed by prolonging or overhanging the upper end of the
boiler. The underside of this overhanging end is formed of corrugated plates. If
desired it may be plain and secured by dog stays. The boiler is set in a brick
furnace fired in the usual way from the front; the gases of combustion pass from
the furnace to the combustion chamber (which is built up in brick), and then
through the return tubes to the front of the boiler, where I provide a central baffle.
plate which splits the draft and carries the heated gases in a return direction
through side flues (which I form outside the boiler) to the back of the boiler and
into the chimney.
The advantages of a boiler constructed according to my Invention are, increased
heating surface, together with heating the water at the lowest point first, and
thereby insuring free circulation of the water and more uniform expansion and
contraction of the metal.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said John Wilfred de Villemont Galwey in the Great Seal Patent
Office on the 21st February 1882.
JOHN WILFRED DE VILLEMONT GALWEY, of Warrington, in the County of
Lancaster, Engineer. "IMPROVEMENTS IN STEAM BOILERS."
My Invention relates to a novel construction and arrangement of multitubular
boiler, and consists of a cylindrical shell provided if desired with a suitable steam
dome. The lower portion of the cylindrical shell or boiler is provided with a nest
of tubes through which the gases of combustion pass from the combustion chamber.
The combustion chamber is formed by prolonging or overhanging the upper end of
the boiler. The underside of this overhanging end is formed of corrugated plates.
If desired it may be plain and secured by stays. The boiler is set in a brick furnace
fired in the usual way from the front; or in the case of a wet bottomed boiler
the furnace is in the flue or flues, the gases of combustion pass from the furnace to
the combustion chamber (which is built up in brick) through the return tubes
to the front of the boiler, where I provide a central baffle plate which splits the draft,.
and carries the heated gases in a return direction through side flues, which I form
outside the boiler to the back of the boiler and into the chimney; or when desirable
direct from the smoke box into the chimney.
The advantages of a boiler constructed according to my Invention are, increased
heating surface, together with diminishing the dead water spaces, and thereby
insuring free circulation of the water and more uniform expansion and contraction
of the metal.
That my Invention may be clearly understood I have hereunto attached three
Sheets of Drawings illustrative of my Invention, showing how the same may be
put into practical operation. The Drawings are marked with figures and letters
of reference corresponding with those used in the following explanation, and like
letters and figures are used to denote the same or corresponding parts throughout

page_text: boiler A is prolonged at C so that it forms a cover or top to the combustion
chamber D. The overhanging end C has its underside (being the top of the com-
bustion chamber formed of corrugated plates E (see Figures 1 and 2), or in some
cases the underside of the overhanging end C may be made plain, and supported
and secured by stays (as shown in Figures 3 to 9 inclusive).
The boiler A is set in a brick furnace over the fire place F, the boiler being fired
from the front G, the fire place being under the shell of the boiler and separated from
the combustion chamber D by the bridge H. The combustion chamber D is formed
by the brickwork J and the overhaning end C of the boiler A. The products and
gases of combustion pass from the fire place F to the combustion chamber D, and
through the tubes or flues B to the front of the boiler G, where they are divided by
a baffle plate, and then are led through the side flues K (see Figures 2, 3, and 8)
to the chimney at the back of the boiler. If desired the gases may be taken from
the front of the boiler direct to the chimney. If desired flues may be substituted
for the tubes B, and they may be used as heating flues; or where wet bottomed
boilers are desired they may be used to contain the fire place. An example of a
wet bottomed boiler is shown at Figures 4 and 5, the fireplace in this case being in
the flue F..
In a double boiler constructed according to my Invention two structures, similar
to that shown at Figure 1, are used, as illustrated in the examples Figures 6 and 9.
In this case the brickwork J forms a division which separates the combustion
chambers D, D, the over-hanging portion C, C, forming the top of the combustion
chamber.
In the type of boiler shown at Figures 10 and 11, the main shell plate is carried
right round under the fire, the fire being in the central flue, the underside of which,
where exposed to heat, may be lined with fire brick or any suitable substance.
In witness whereof, I, the said John Wilfred de Villemont Galwey, have
hereunto set my hand and seal, this Fifteenth day of February, in the
year of our Lord One thousand eight hundred and eighty two.
JOHN WILFRED DE VILLEMONG T.α) CATWEV