Improvements in Tubular Fuel Economisers, Hot Air or Water Heaters or the like.
Year: 1899

page_text: Date of Application, 19th Dec., 1899
Complete Specification Left, 22nd Sept., 1900-Accepted, 27th Oct., 1900
Date of Application, 19th Dec., 1899
Complete Specification Left, 22nd Sept., 1900-Accepted, 27th Oct., 1900
PROVISIONAL SPECIFICATION.
Improvements in Tubular Fuel Economisers, Hot Air or Water
Heaters or the like.
I, HENRY GRANDAGE, of Low Royd and Brown Royd Dye Works, Thornton
Road, Bradford, in the County of York, Dyer, do hereby declare the nature of
this invention to be as follows:-
This invention has for its object to improve the effectiveness of economisers,
air heaters and the like of that kind which are placed in flues or other heating
areas.
In carrying my invention into effect, as applied to apparatus for heating air,
I provide any suitable number of rows of air heating tubes and a pair of boxes
for each row, into which the respective ends of the tubes are ferruled or pressed.
The boxes are made in the form of cast iron pipes having a flat tube plate
in front into which the tubes are ferruled or pressed as aforesaid, while the
back of the boxes is made to taper longitudinally. Inside the boxes immediately
at the entrance to each tube, I place a plate or web standing out from the tube
plate at an angle of 45 or any other number of degrees. These plates may if
desired be loose so as to be able to draw out a broken tube or for other purposes,
in which case they are each formed of a loose plate slid into guides. In cases
however where the boxes are formed in one piece instead of being built up of
separate parts these plates or webs may be cast in situ.
of each box inside I also cast a series of vertical strengthening ribs deep at the
On the tapering back
entrance end of the box but tapering away to nothing at the other end, or in
cases where the boxes are built up, I cast them or fasten them on to the back
plate or plates. I provide also an admission pipe to the series of top boxes.
This feeds air into the top boxes and so through the tubes into the bottom boxes
and thence through a discharge pipe. These admission pipes are also provided
with deflector plates to direct the flow of air and guide it into each box and so
through the tubes. The discharge pipe of the heater is provided with similar
plates to direct the air discharge. Both admission and discharge pipes are made
taper longitudinally at back, while at front they are flat to receive the ends of
the boxes. There are the bolt flanges to fasten the admission and discharge
pipes to the top and bottom boxes. I regard the tapered back of each box and
also the tapered back of each admission pipe as an important feature of the
invention, as the slope of the back assists in throwing the air on to the deflector
plates and so assists them in directing the air along each box, and in guiding
the air into the tubes. In the case of the bottom box and discharge pipe the taper
assists in guiding the hot air from the tubes to the discharge. The invention
as applied to apparatus for heating other fluids besides air will be understood
without further description.
Doted this 10th
T
1
1000
W. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool,
Patent Agents for the Applicant.

page_text: Improvements in Tubular Fuel Economizers, Hot Air or
Heaters or the like.
Water
I, HENRY GRANDAGE, of Low Royd and Brown Royd Dye Works, Thornton
Road, Bradford, in the County of York, Dyer, do hereby declare the nature of
this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement:-
This invention has for its object to improve the effectiveness of economisers,
air heaters and the like of that kind which are placed in flues or other heating
areas.
The invention will be understood from the following description, reference
being had to the accompanying drawings in which,
Fig. 1 is a transverse sectional elevation of an economiser or air heater con-
structed in accordance with my invention which can be placed in a flue, or such
other situation that heat passing therethrough will act upon the air passing
through the tubes;
Figure 2 a vertical section thereof;
Figure 3 a sectional plan.
As applied to apparatus for heating air, I provide any suitable number of rows
of air heating tubes A and a pair of boxes B for each row, into which the respec-
tive ends of the tubes are ferruled or pressed.
The boxes B are made in the form of cast iron pipes having a flat tube plate b
in front into which the tubes A are ferruled or pressed as aforesaid, while the
back of the boxes is made to taper longitudinally. Inside the boxes imme-
diately at the entrance to each tube A, I place a plate or web C standing out from
the tube plate at an angle of 45 or any other number of degrees. These plates
may if desired be loose so as to be able to draw out a broken tube or for other
purposes, in which case they are each formed of a loose plate slid into guides.
In cases however where the boxes are formed in one piece instead of being built
up of separate parts these plates or webs may be cast in situ. On the tapering
back of each box inside I also cast a series of vertical strengthening ribs D
deep at the entrance end of the box but tapering away to nothing at the other
end, or in cases where the boxes are built up, I cast them or fasten them on
to the back plate or plates. I provide also an admission pipe E to the series
of top boxes B. This feeds air into the top boxes and so through the tubes A
into the bottom boxes B and thence through a discharge pipe F.
These
admission pipes are also provided with deflector plates G to direct the flow of
air and guide it into each box and so through the tubes. The discharge pipe F
of the heater is provided with similar plates G to direct the air discharge.
Both admission and discharge pipes E and F are made to taper longitudinally at
back, while at front they are flat to receive the ends of the boxes B. There are
the bolt flanges to fasten the admission and discharge pipes to the top and
bottom boxes B. I regard the tapered back of each box B and also the tapered
back of each pipe E and F as an important feature of the invention, as the
slope of the back assists in throwing the air on to the deflector plates C and G
and so assists them in directing the air along each box, and in guiding the air
into the tubes A as well as allowing the full flow of air to enter the tubes. In
the case of the bottom box B and discharge pipe F the taper assists in guiding
the hot air from the tubes to the discharge. The invention as applied to
apparatus for heating other fluids besides air will be understood without further
description.

page_text: 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:
1. A tubular fuel economiser, hot air or water heater or the like, comprising
rows of heating tubes, a pair of boxes for each row having a flat tube plate in
front into which the heating tubes are ferruled or pressed, and fluid admission
and discharge pipes constructed, arranged and operating substantially as described
with reference to the drawings annexed.
2. The improvement in fuel economisers, hot air or water heaters or the like,
which consists in placing inside the pipes or passages in which the respective
ends of the tubes (or of the boxes) are ferruled or pressed, deflector plates or
webs standing out from the inside surface of said pipes or passages, and form-
ing the back of the said pipes or passages to taper longitudinally in such a
manner as to assist, in the case of the admission passages, in throwing the fluid
on the deflecting plates and so guiding it into the tubes (or boxes), or in the
case of the exhaust passages to guide the heated fluid from the passages into the
discharge, substantially as described.
3. A tubular fuel economiser, hot air or water heater or the like, characterised
by the interior of the tubes or passages that convey (or discharge) the fluid to
or from the heating tubes, being made to taper longitudinally on one side, and
on the opposite side where the tubes or passages are inserted provided with
deflectors for guiding the fluid into or out of the tubes, substantially as described.
4. In tubular fuel economisers, hot air or water heaters or the like, providing
the tapering back of each box or passage inside with strengthening ribs deep
at the entrance end but tapering away to nothing at the other end, substantially
as described.
5. The tubular fuel economiser, hot air or water heater or the like, constructed.
arranged and operating substantially as herein described with reference to and
shown in the drawings annexed.