IMPROVEMENTS IN BOILERS FOR HEATING WATER AND FOR GENERATING STEAM
Year: 1878

page_text: LETTERS PATENT to Robert Wagstaff, of Hyde, in the County of Chester,
Engineer, for the Invention of "IMPROVEMENTS IN BOILERS FOR HEATING
WATER AND FOR GENERATING STEAM."
Sealed the 28th February 1879, and dated the 3rd September 1878.
PROVISIONAL SPECIFICATION left by the said Robert Wagstaff at the Office
of the Commissioners of Patents on the 3rd September 1878.
ROBERT WAGSTAFF, of Hyde, in the County of Chester, Engineer. "IMPROVE-
MENTS IN BOILERS FOR HEATING WATER AND FOR GENERATING STEAM.”
My improved boiler for heating water consists of a conical or cylindrical double
casing containing the water to be heated; within the inner casing are placed two
or moro coils of pipes, the ends of which are connected to the upper and lower parts
of the double casing. The end of each pipe passes through a conical flanged hole
pressed out of the inner casing, and it is secured by a nut which is tightened up or
slackened through a similar enlarged hole in the outer casing, which is closed by a
screw plug; by this means either of the coils of pipes can be taken out and replaced
when required.
The fire-grate is placed below and the fuel is fed from above to the inside of the
coils of pipes.
The mode of connecting the screw plug to the outer casing may be adapted for
connecting the hot water and return pipes to the improved boiler above described,
or to any other water-beating apparatus.
Our improved boiler for generating steam consists of a fire-box containing two or
more coils of pipes as above described, the upper ends of which are connected to the
inner casing or to the top of the fire-box, and the lower ends are connected to the
bottom of the fire-box.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Robert Wagstaff in the Great Seal Patent Office on the 28th February
1879.
"IMPROVE-
ROBERT WAGSTAFF, of Hyde, in the County of Chester, Engineer.
MENTS IN BOILERS FOR HEATING WATER AND FOR GENERATING STEAM."
My improved boiler for heating water consists of a conical or cylindrical double
casing containing the water to be hented; within the inner casing are placed two
or moro coils of pipes, the ends of which are connected to the upper and lower parts
of the double casing. The end of each pipe passes through a conical flanged hole
pressed out of the inner casing, and it is secured by a nut which is tightened up or
slackened through a similar enlarged hole in the outer casing, which is closed by a
screw plug; by this means either of the coils of pipes can be taken out and replaced
when required.
The fire-grate is placed below and the fuel is fed from above to the inside of the
coils of pipes.
The mode of connecting the screw plug to the outer casing may be adopted for
connecting the hot water and return pipes to the improved boiler above described,
or to any other water-heating apparatus.
My improved boiler for generating steam consists of a fire-box containing two or
more coils of pipes as abovo described, the upper ends of which are connected to the
inner casing or to the top of the fire-box, and the lower ends are connected to the
.bottom of the fire-box.
And in order that my Invention may be fully understood,
describe the accompanying Sheet of Drawings.
will proceed to
Fig. is a vertical section of my improved boiler for heating water for green-
houses and other purposes.
The
a is the outer casing, and b, the inner casing, the space between which is filled
with water. Within the inner casing b are placed four or other convenient number
of coils of pipes c, c, the ends of which are connected to the upper and lower parts
of the double casing, to establish the circulation of the water in the boiler.
end of each pipe c passes through a conical flanged hole pressed out of the inner
casing b, as shown on an enlarged scale in Fig. 2, and it is secured by the nut c',
which can be tightened up or slackened by a box key passing through a similar
enlarged hole in the outer casing a, which is strengthened by having an inserted
<ring welded in; this enlarged hole is closed by the screw plug d. By this arrange-
ment either of the coils of pipes c can be taken out for repairs or cleaning when
required.
The fire-grate e is placed below the coils of pipes, and the fuel is fed from above
by removing the lid f. The door h, shown by dotted lines, is only used when
lighting the fire on the grate e, or cleaning out clinkers and other purposes.
The branch pipe 7, shewn in Fig. 2, is screwed into the outer casing a, and is
intended as an inlet or outlet passage for the water in the casing.
Fig. 3 is a vertical section of one mode of constructing my improved steam boiler.
In this arrangement I leave considerable space for steam in the outer casing a,
above the dome of the inner casing or fire-box b, and placo two double coils of
pipes.c, c, one within the other; the ends of these pipes are connected to the inner
casing as above described, and the fire-grate e is also placed below as before. The
fuel is fed into the grate in the ordinary way at the door h, shewn in dotted
⚫lines.
८
Near the upper end of the inner casing I place a circular plug of fire-brick k, to
divert the flames and throw the heat on to the tubes and inner shell of the boiler,
which plug is also used as a damper by moving the lover i connected to the shaft j,
on which the plug k is fixed. When the lever i is drawn down the entrance to tho
chimney m is closed, and it can be opened to the extent required by raising the
lever.

page_text: Figs. 4, 5, 6, and 7 shew different arrangements of coils to suit various sizes of
boilers. The boiler shewn in Fig. 4 contains four coils of pipes, and Fig. 5 contains
two coils of pipes. Fig. 6 contains eight coils, and Fig. 7 contains twelve coils; or
there may be three, six, nine, or any other number of coils in the same line.
Having thus stated the nature of my Invention, and described several modes of
performing the same, I declare that I claim,-
First. The general combination of the parts forming the improved boilers, shown
and described, for heating water and generating atenm.
Secondly. The improved mode of connecting the ends of the coils of pipes to the
casing in combination with the outer plug hole for giving access to the same.
Thirdly. The improved plug hole for connecting the flow and return pipes for
hot water boilers, and the outlet for steam boilers.
In witness whereof, I, the said Robert Wagstaff, have hereunto set my hand
and seal, this Twenty-sixth day of February, One thousand eight hundred
and seventy-nine.
ROBERT WAGSTAFF. (L.s.)