IMPROVEMENTS IN BOILERS FOR HEATING WATER FOR WARMING BUILDINGS AND OTHER LIKE USES
Year: 1871

page_text: LETTERS PATENT to Edwin Lumby, of Halifax, in the County of
York, Welded Boiler Manufacturer and Hot Water Engineer, for
the Invention of "IMPROVEMENTS IN
BOILERS FOR HEATING WATER FOR
WARMING BUILDINGS AND OTHER LIKE USES."
Sealed the 12th September 1871, and dated the 30th March 1871.
PROVISIONAL SPECIFICATION
left by the said Edwin Lumby at the
Office of the Commissioners of Patents, with his Petition, on the
30th March 1871.
I, EDWIN LUMBY, of Halifax, in the County of York, Welded
Boiler Manufacturer and Hot Water Engineer, do hereby declare the
nature of the said Invention for ' IMPROVEMENTS IN BOILERS FOR HEATING
WATER FOR WARMING BUILDINGS AND OTHER LIKE USES. to be as follows:-
My improvements relate,-
66
"
Firstly. To the class of boilers known as the independent dome-
top cylinder boilers," that is, boilers having dome or other shaped
water space extending over the furnace or fire-tube.
In constructing
such boilers according to this Invention, I aflix the " feed tube, through
which the furnace is supplied with fuel, immediately over and inde-
[Price Gd.]

page_text: pendent of the smoke flue and through the dome, that is, on the
central vertical line of the boiler. This arrangement of feed way greatly
facilitates supply of fuel, the furnace may be filled to a higher level,
and the distribution of fuel is more even than when supplied through
the side or oblique feed ways as applied to boilers heretofore constructed.
Secondly. To that class of vertical boiler, cylindrical or conical,
encased or enclosed by brickwork, built concentric therewith, leaving a
space between the exterior of the boiler and brickwork for circulation
of heated gases, such gases, passing through an aperture or grating
formed in the smoke flue above the water space of the boiler and divided
by midfeathers around the said boilers to the flues, Boilers of this class
1 construct as follows:-The aperture or passage for heated gases from
the furnace or fire-tube is formed through the body of the boiler at a
distance below the top of the water space; the latter or upper portion
of the water space is constructed so as to extend partially over the
furnace that the flame and heated gases act on this increased and
additional water way and heating surface before passing through the
aperture to the brick way and flue.
Thirdly. The improvements relate to the class of boiler last described
where large capacity is required. I construct such boiler with an
additional or supplementary water heating case extending partially over
the furnace (leaving aperture for supply of fuel) and supported over or
above the lower boiler by means of pipes, which pipes also connect
the water spaces of the boiler and the water case. The space between
the supporting and connecting pipes is enclosed by brickwork or by
means of iron clip or band, leaving an aperture for the passage of flame
and heated gases, after acting on the upper or supplementary heating
case or water space as described, to pass through the aperture to the
exterior of boiler, thence to flue.
It will be seen the arrangement last described greatly facilitates con-
struction of boiler where large capacity of welded boiler is requisite, and
that the supplementary water spate, connecting pipes, and band or clip,
may readily be applied to existing boilers where increase of heating
capacity is required. These boilers combine direct action of flame and
heated gases on that part of the boiler extending over the furnace as
above described, direct feeding from the top of the boiler, and the direct
flow of the water from the top of the upper water space.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Edwin Lumby in the Great Seal Patent Office on
the 29th September 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, EDWIN
LUMBY, of Halifax, in the County of York, Welded Boiler Manufacturer
and Hot Water Engineer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirtieth day of March, in the year of
our Lord One thousand eight hundred and seventy-one, in the thirty-
fourth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Edwin Lumby, Her special licence,
that I, the said Edwin Lumby, my executors, administrators, and assigns,
or such others as I, the said Edwin Lumby, my 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 BOILERS FOR HEATING
the condition
WATER FOR WARMING BUILDINGS AND OTHER LIKE USES." upon
(amongst others) that I, the said Edwin Lumby, my executors or
administrators, by an instrument in writing under my, 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 l'atent
Office within six calendar months next and immediately after the date
of the said Letters Patent.
NOW KNOW YE, that I, the said Edwin Lumby, do hereby declare
the nature of my 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 accompanying Sheets of Drawings (that is to
say) :—
My improvements relate,-
independent
Firstly. To the class of boiler known as the
* and other
dome-top cylinder boilers, that is, boilers having dome or other shaped
water space extending over the furnace or fire-tube. In constructing
such boilers according to this Invention I affix the "feed tube," through
which the furnace is supplied with fuel, immediately over and through
the dome and independent of the smoke flue, that is, on the central

page_text: vertical line of the boiler. This arrangement of feed way greatly
facilitates supply of fuel. The furnace may be filled to a higher level,
and the distribution of fuel is more even than when supplied through
the side or oblique feed ways as applied to boilers heretofore constructed.
Secondly. To that class of vertical boiler, cylindrical or comical,
encased or enclosed by brickwork, built concentric therewith, leaving a
space between the exterior of the boiler and brickwork for circulation
of heated gases, such gases passing through an aperture or grating
formed in the smoke flue through the water space of the boiler and
divided by midfeathers around the said boilers to the flues. Boilers of
this class 1 construct as follows:-The aperture or passage for heated
gases from the furnace or fire-tube is formed through the body of the
boiler at a distance below the top of the water space; the latter or
upper portion of the water space is constructed so as to extend partially
over the furnace, that the flame and heated gases act on this increased
and additional water way and heating surface before passing through
the aperture to the brick way and flue.
Thirdly. The improvements relate to that class of boiler last described
where large capacity is required. 1 construct such boiler with an
additional or supplementary water heating case extending partially over
the furnace (leaving aperture for supply of fuel) and supported oyer or
above the lower boiler by means of pipes, which pipes also connect the
water spaces of the boiler and the water case. The space between the
supporting and connecting pipes is enclosed by brickwork or by means
of iron clip or band, leaving an aperture for the passage of flame and
heated gases, after acting on the upper or supplementary heating case
or water space as described, to pass through the aperture to the exterior
of boiler, thence to flue.
It will be seen the arrangement last described greatly facilitates con-
struction of boiler where large capacity of welded boiler is requisite,
and that the supplementary water space, connecting pipes, and band or
clip may readily be applied to existing boilers where increase of heating
capacity is required. These boilers combine direct action of flame and
heated gases on that part of the boiler extending over the furnace, as
above described, direct feeding from the top of the boiler, and the direct
flow of the water from the top of the upper water space.
Such being the nature and object of this my said Invention, I will
now proceed to describe the same in detail, and in order that the

page_text: sane may be fully understood I have hereunto annexed two Sheets of
Drawings, and have marked the same with figures and letters of
reference, in which Fig. 1 is an elevation and Fig. 2 a vertical section
of a dome-top cylinder boiler with its feed way A. immediately over and
through the dome B, whereby the supply of fuel is greatly facilitated.
The furnace may be filled to a higher level and the distribution of
fuel within the furnace is more even than when supplied through a side
or oblique feed way.
In the construction of vertical boilers, cylindrical, or of other form,
encased or enclosed by brickwork built concentric therewith, leaving a
space between the exterior of the boiler and brickwork for circulation
of heated gases, such gases passing through an aperture or grating
formed in the smoke flue through the water space of the boiler, and
diverted by midfeathers around the said boiler to the flue. At Fig. 3
is shewn vertical section of a boiler of this class, constructed according
to my Invention.
A is the boiler; the upper portion of the water space B, as shewn, is
constructed so as to extend partially over the furnace C; the flame and
heated gases act on this increased and additional water way and heating
surface before passing through the aperture or grating D, which, as
shewn, is formed through the body of the boiler at a distance below the
top of the water space. E, E, are the midfeathers for diverting and
thus increasing the circulation of the flame and heated gases within the
brick space, the bottom of which is shown at F. When desirable the
aperture for escape of heated gases may be formed through dome of
boiler, as shewn at P. Fig. 3ª. At Fig. 4 is shewn elevation of this
class of boiler, which is fed direct from the top through the feed tube G.
Fig. is a vertical section and Fig. 6 an elevation of a boiler of the
class where large capacity is required. I construct such boilers with an
additional or supplementary water heating case H having dome-shaped
top J extending partially over the furnace K. L is a tube for supply
of fuel. The water heating case H is supported over or above the lower
hoiler by means of pipes M, which pipes also serve to connect the water
spaces of the boiler and case; the space between the supporting and
connecting pipes is enclosed by brickwork or by means of an iron clip
or band N, shewn at Figs. 8 and 9. At P is an aperture for the passage
of flame and heated gases after acting on the upper or supplementary
heating case or water space as described above.

page_text: At Fig. 7 is shewn detached view of the additional or supplementary
water heating case.
Fig. S is an elevation of the independent boiler shewing the means of
connection by the bands N. Fig. 9 is a vertical section of the same
shewing heating case H applied thereto.
Flaving thus fully described and illustrated the nature and particulars
of this my Invention, together with the manner in which the same is
to be or may be performed or carried into practical effect, I would have
it distinctly understood that I claim as my Invention,―
Firstly. The direct or central feed way A, independent of the smoke
flue, in connection and combination with internal dome-top boilers, as
herein described and illustrated.
Secondly. The construction of cylindrical or other shaped boilers
having apertures or gratings for the escape of heated gases formed below
the top of the water space, in combination with the central or direct
feed way, in the manner and for the purpose above described.
Thirdly. The construction and application of the additional or supple-
mentary water space, together with the supporting and connecting pipes,
as and for the purpose herein fully described.
In witness whereof, 1, the said Edwin Lumby, have hereunto set
+
my hand and seal, this Twenty-eighth day of September, in the
year of our Lord One thousand eight hundred and seventy-one.
Witness,
J. E. WALSП,
Clerk to Tasker & Brierley,
Patent Agents,
Halifax.
EDWIN LUMBY. (L.S.)