Year: 1897

page_text: Date of Application, 2nd Oct., 1897
Complete Specification Left, 11th May, 1898-Accepted, 18th June, 1898
I, THOMAS LOWE, of Churchville Mill, Hartley Road, Old Radford, in the City
of Nottingham, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in apparatus applicable to steam boiler
and other furnaces for heating air and delivering it over the fire in order to effect
a more perfect consumption of the smoke.
In carrying out this invention I place on the interior of the furnace, a preferably
arch shaped hollow casing or chamber of any convenient shape in cross section,
the two legs of which rest préferably on the dead plate.
At this point the casing is formed with inlet openings which fit over correspond-
ing openings in the dead plate through which air is admitted from the ashpit to
the interior of the casing.
The air rises up the two legs of the casing to the crown and is then conducted
by a hollow forward extension of the casing provided with an outlet at the end,
and is delivered by this extension over the fire at a point which is found to be best
for producing the required result in each particular case.
In order that the point of delivery may be adjusted the extensions may be
formed independently of the main part of the casing and be connected thereto
by a telescopic or other convenient joint in order that the outlet may be adjusted
in the required position to suit different requirements.
By means of the extension the air may be conveyed to the required point
without materially reducing the heating area of the furnace.
The inlet openings in the dead plate may be fitted with doors or regulators of
any suitable form in order to regulate the admission of air to the casing.
The air admitted is heated as it rises in the casing and passes along the extension
by radiated heat from the fire and is thus of a high temperature before it is
delivered into the furnace and will consequently have no injurious effect on the
crown plate.
The exterior wall of the arched casing may be arranged to fit up to the crown
of the furnace or be a short distance therefrom. The interior diameter of the
casing may also be reduced at the front in order to increase the air capacity of
the casing and also afford more protection to the furnace front.
In furnaces in which the crown of the furnace is other than arch shaped the
body of the casing may be of the form described, or conform to the shape of the
furnace the inlet openings may also in some cases be more conveniently placed
in the furnace front.
Dated this 2nd day of October 1897
BOULT & WADE,
Agents for the Applicant.

page_text: I, THOMAS LOWE, of Churchville Mill, Hartley Road, Old Radford, in the City
of Nottingham, Engineer, do hereby declare the nature of this invention and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement:.
This invention relates to improvements in apparatus applicable to steam boilers
and other furnaces, for the purpose of heating air and delivering it over the fire
in order to effect a more perfect combustion of the smoke.....
The invention will be best understood by reference to the accompanying draw-
ings, in which
Fig. 1 is a vertical section showing my invention applied to a boiler furnace.
Fig. 2 is a front elevation showing the furnace front removed.
Fig. 3 is a plan partly in section, and
Fig. 4 a vertical section showing one of the openings in the deadpláte.
Like letters indicate like parts throughout the drawings.
In carrying out this invention I place in the interior and at the front of the
furnace A, a preferably arch shaped hollow casing or chamber B. In front eleva-
tion the exterior wall C of this casing preferably approximates in shape to that
of the crown of the furnace to which it is applied, whilst the interior wall D may
approximate in shape to that of the opening F in the front plate, for the insertion
of fuel.
"
The front of the casing B is preferably formed with a flange or rib E around
the opening through which the fuel is passed into the furnace and the flange fits
close up to the front F of the furnace as shown, and thus closes the space between
the casing B and front F.
At the rear, the casing B is formed with a hollow extension B¹ of a suitable
size and shape in section, which projects from the crown of the casing to a suitable
point over the fire, the end being open.
The two lower ends of the casing B are also open and rest on and may be
bolted to the deadplate G in which openings G1 (see Fig. 4) corresponding to those
in the casing B are formed. Air is thus admitted from the ashpit through these
openings Gin the deadplate G, to the lower ends of the casing B, up which it
rises to the crown and is heated in its passage, it is then conducted by the hollow
extension B and delivered at its extreme end over the fire the length of the exten-
sion B being adjusted to deliver the heated air at a point which is found to be
best for consuming the smoke in each particular case.
In order that the point of delivery may be readily adjustable if desirable, the
hollow extension B¹ may in some cases be formed independently at the main
part B and be connected thereto by a telescopic or other convenient joint.
By means of the extension B¹ the heated air may be conveyed to any required
point in the length of the furnace without materially reducing the heating area
of the said furnace.
• Cu
1.
The inlet openings in the deadplate may be fitted on the underside with sliding
doors or shutters H; these doors preferably slide parallel with the front of the
furnace and are connected by links I to a lever J pivotted to the deadplate G as
shown.
FA
By means of the lever J both doors H may be opened or closed simultaneously
and the admission of air to the casing B may thus be conveniently regulated.
If preferred instead of the sliding doors H, regulators of any well known type
may be employed.
In furnaces in which the crown of the furnace is other than arch shaped, the

page_text: exterior wall of the casing may be of the form described, or conform to the shape
of the furnace, the inlet openings may also in some cases be more conveniently
placed in the furnace front, instead of in the deadplate.
The casing B may be formed in one piece or be subdivided at the crown as
shown in order that it may be conveniently placed in position.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:-
1. The combination with a furnace of an arch shaped casing such as B provided
with inlet openings at or near its base and a hollow extension B¹ extending from
the crown at the end of which is formed the outlet substantially as described.
2. The combination with a furnace of an arch shaped casing such as B pro-
vided with a flange E inlet openings at or near its base and a hollow extension B₁
extending from the crown at the end of which is the outlet substantially as and
for the purpose described.
3. The combination with a furnace of an arch shaped casing such as B provided
with openings at or near its base openings G¹ in the deadplate sliding doors such
as H and a hollow extension B¹ extending from the crown in which is formed the
outlet substantially as and for the purpose described.
4. The combination and arrangement of parts constituting the complete
apparatus for heating and delivering air into the furnace substantially as and for
the purpose described and illustrated in the accompanying drawings.
Dated Us
May
1050.
THOMAS LOWE.
Boult & Wade,
Agents for the Applicant.
THOMAS LOWE.
Boult & Wade,
Agents for the Applicant.