An Improved Construction or Arrangement of Boiler for Rapidly Heating Contents by Gas Flame.
Year: 1886

page_text: Date of Application, 22nd Dec., 1886
Complete Left, 22nd Sept., 1887
Complete Accepted, 25th Oct:, 1887
An Improved Construction or Arrangement of Boiler for Rapidly
Heating Contents by Gas Flame.
I, ALFRED BUSH WILLWAY, of Drawbridge, Bristol, Somerset, Civil Engineer, do
hereby declare the nature of my said invention to be as follows:-
The object of my invention is, an improved construction or arrangement of boiler,
for rapidly heating contents by gas flame, and this I effect by arranging a series of
vertical tubes to, or cast in a piece with, the bottom plate of the boiler or other vessel,
for heating water or other liquid, said tubos projocting well up into or through the
water or liquid and closed at the upper ends. The tubes also project bolow the bottom
plate so that the flame of gas, the burner of which is arranged under, may not only
have play around the projecting ends of the tubes but also up inside of them for
rapidly heating the water or liquid.
The dome or top plate of the boiler is removable, if the top plato be required, to
facilitate replacing a tube when necessary.
One or more of the tubes may be in two pieces, provided with flanges and screwed
to the bottom plate and need not be of the same diameter throughout their length, nor
straight; the lower projecting ends may vary in length.
If the tubes are of larger diameter at their upper ends, the enlarged spaces in such
tubes form an additional heating medium acting as a kind of gas expansion chamber
in which the air contained in them can bo heated to a much higher degree than if the
tubes were parallel in their length.
A screen may be fitted around the bottom edge of the boiler or heating vessel for
retaining the heating, power of the gas flame within the tubes to assist in supporting
combustion.
Dated this 22nd day of December 1886.
H. GARDNER,
166, Fleet Street, London,
Agent for the said A. B. Willway.

page_text: Dating Contents by Cas Flame.
I ALFRED BUSH WILLWAY of Drawbridge, Bristol, Somerset, Civil Engineer, 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-
The object of my invention is an improved construction or arrangement of boilor,
for rapidly heating contents by gas flame; and this I effect by arranging a sorics of
vertical tubes to, or cast in, a piece with the bottom plate of a boiler or other vessel,
for heating water or other liquid, said tubes projecting woll up into or through the
water or liquid and closed at the upper ends. The tubes also project below the bottom
plate so that the flame of gas, the burner of which is arranged under, may not only
have play around the projecting ends of the tubes but also up insido of them for
rapidly heating the water or liquid.
The dome or top plate of the boiler is removable, if a top plate be required, to
facilitate replacing a tube when necessary. One or more of the tubes may be in two
pieces, provided with flanges, and screwed to the bottom plate, and need not be of the
same diameter throughout their length; the lower projecting ends may vary
in length.
If the tubes are of larger diameter at their upper ends the enlarged spaces in such
tubes form an additional heating medium, acting as a kind of gas expansion chamber,
in which the air contained in them can be heated to a much higher degree than if the
tubes were parallel in their length.
A screen may be fitted around the bottom edge of the boiler or heating vessel, for
retaining the heating power of the gas flamme, within the tubes, to assist in supporting
combustion.
Two examples of my invention are shown in the annexed drawings Figures 1 and 2,
the apparatus being specially adapted for heating Greenhouses, Conservatories or
Rooms whether the boiler be fitted in a building or outside of it, a coil or return
series of piping being arranged in connection with the boiler for constant circulation
and an equal distribution of heat thereby.
Figure 1 shows a section of an apparatus composed of a boiler A having a series of
tubes B arranged vertically from the bottom plate C. The upper ends of the tubes B
are closed, but their bottoin ends are open and project below the bottom plate so that
the flame from the burner D enters the tubes B as well as around them and acts
against them and also against the bottom plate C.
The top plate E of the boiler is held in position by the central or longer pipe F
over which it fits by a scrow nut G, the meeting edges of such top plate being ground
true to the top edge of the boiler for making the boiler practically watertight.
The tubes B may be cast in a piece with the bottom plate C or they may be ordinary

page_text: screw threaded barrel piping screwed to the bottom plate C as indicated at Figure 3,
the upper end being closed by a screw cap F.
In Figure 1 I show a circulation coil H, the level of the water being maintained in
said coil and also in the boiler A by the feeding trough I above.
The boiler proper may be enclosed in a jacket or casing J so that the flame heat may
pass up the side walls, which may be plain or havo gills K (or baffle plates) for
breaking up the heat into stream-like-divisions to ensure all the heat given off from the
flame being taken up by the boiler, spent vapour alone passing away by the
chimney L.
1
The tubes B may be parallel for their full length as at Figure 1 or have enlarged
ends as at Figure 2 which would give increased room for the expansion of the heated
air within said tubes against, and into which the flame has full play, and instead of
the tubes B being all of the same length as at Figure 1 they may vary in length at
the bottom projecting ends, as at Figure 2, and a curtain M may be fitted to prevent
undue escape of heat from the boiler.
I purpose making the central tube F of the series as the top plate supporting tube,
and as an air passage tube, which prevents checking of the draught and assists
combustion, particularly if the burner D he of ring shape with a central opening for
free access of air, but said central tube may be closed at the top like the others.
I have referred to a coil H being in connection with my improved boiler for rapidly
heating water, but any system or arrangement of pipes can be put in connection with
the branches N, P, according to the dimensions, or the purpose for which such boiler
is applied.
It is not always necessary that a top plate E be rigidly fitted to the boiler A, that
being determined by the position of the upper branch N, and instead of the central
tube F, having a passage through it, any of the other tubes may be so arranged,-the
object being to rapidly heat water, by means of gas, a lamp or other flame and air
within closed tubes encircled by water, and within the boiler, the tubes having ends
projecting at the bottom below the bottom plate, and in direct contact with the flame.
The boiler hereinbefore described is applicable for heating baths, or the water for
baths, also for general cooking purposes and if the two branches be in connection with
an ordinary, or an improved, kettle, for rapid heating of the water therein; the
apparatus constituting by the necessary modifications an ordinary gas boiler or kettle,
with very large heating surface for rapidly and cheaply heating the contents.
Where large boilers are necessary such as for Hotels, Restaurants, and the like, the
tubes B are readily inserted into the bottom plate C and renewed from time to time
by adopting the plan shown at Figure 3, which shows a short length of gas barrel B
closed at top by à screw cap Q and having a ring R screwed on its opposite end, at
the end of the thread, to form a shoulder for sitting on the bottom plate C of the
boiler, another ring (or ferrule) S being screwed on, to abut against the underside of
the boiler plate C and fix the tube B in position.
a
Having now particularly described and ascertained the nature of my said invention
and in what manner the same is to be performed I declare that what I claim is :-
The apparatus shown at Figures 1 and 2 of the annexed drawings, constituting
boiler having internal closed end tubes, with projecting open bottom ends, against
which latter, flame has direct impact for rapidly heating the contents of said boiler
substantially as described.
I
32 1
Lambar 1987
H. GARDNER,
166, Fleet Street, London,
Agent for the said A. B. Willway.