Year: 1887

page_text: Date of Application, 3rd Dec., 1887
Complete Specification Left, 3rd Sept., 1888
Complete Specification Accepted, 26th Oct., 188
We ISAAC SHIMWELL MCDOUGALL and JAMES THOMAS MCDOUGALL both of Irk
Vale Chadderton near Manchester in the County of Lancaster Manufacturing Chemists
do hereby declare the nature of this Invention to be as follows:-
This Invention relates to water heaters having a number of tubes containing the
water and subjected on their exteriors to the heat of a furnace or to the heat passing
through a flue or the like in the latter case for utilizing otherwise waste heat for
heating water for feeding a boiler or for other purposes such water heaters are some-
times termed "fuel economizers."
This Invention has for its object to so construct the said heaters that they are
much stronger and lighter than are those hitherto constructed wherein it has been
usual to use cast iron tubes and cast iron chambers for them to communicate with
at top and bottom. A heater constructed according to this Invention presents the
further advantage of being readily accessible for inspection cleaning and repairing.
According to this Invention the tubes are made of wrought or drawn metal. The
tubes are inserted at top and bottom into chambers also made of wrought or drawn
metal. The tubes may be made in a single row or in groups of two or three rows
the row or both or all of the rows being inserted into or connected with chambers
extending at top and bottom of the said series. A number of such series of tubes
inserted into or connected with top and bottom chambers are placed together side by
side so that there may be a space between each such series sufficient to enable a
person to pass between adjacent series to inspect repair clean or remove and replace
the tubes. The chamber or chambers of each series of tubes in by preference made
of a capacity sufficient to enable a person to enter to clean or inspect the tubes from
the interiors of the chambers. The tubes may be inserted into the chambers by
openings formed therein and covered by suitable tight covers secured by a cross bar
and screw or otherwise and the tubes may be fixed into or to the chambers by
expanding them into the tube holes. A suitable number of these tubes by preference
may be threaded and provided with lock nuts within the top and bottom chambers-

page_text: thus making these pipes to act as stay or strengthening tubes or the ends of the said
tubes may be flanged and secured by bolts or rivets with the intervention of a filling
ring or collar or branches or both so that by removing the rivets or bolts the said
ring or collar branches or both can be knocked out and leave the tubes free to be
readily removed. The mud which accumulates in the lower chamber may be removed
by raking it out from tightly closable end openings provided with covers which can
be opened for the purpose. There may be tightly covered openings provided in the
chambers beneath and above each tube or any convenient number of them so as to
enable the interior of the tubes to be cleaned these openings serving also to allow the
tubes to be inserted and withdrawn as aforesaid.
The covers of the openings are preferably placed inside the openings so as to avail
ourselves of the internal pressure to keep them closed.
To clean the exteriors of the tubes I provide scrapers or cleaners extending longi-
tudinally of the tube and fixed at top and bottom to rings capable of being rotated on
the tubes so that the scrapers or cleaners move around and in contact with the
exteriors of the tubes and keep them clean. These scrapers or cleaners may be driven
by any suitable means but a convenient arrangement is to provide each say of the
top rings with teeth by which the rings of the tubes in each row are geared together
the end ones being driven by worms on a shaft extending along the apparatus.
The top and bottom chambers communicate with connections to the inlet and outlet
for water. The tubes may be arranged horizontally vertically or at any suitable
angle being preferably vertical.
Dated this 3rd day of December 1887.

page_text: We ISAAO SHIMWELL MCDOUGALL and JAMES THOMAS MCDOUGALL both of Irk
Vale Chadderton near Manchester in the County of Lancaster Manufacturing Chemists
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 relates to water heaters having a number of tubes containing the
water and subjected on their exteriors to the heat of a furnace or to the heat passing
through a flue or the like in the latter case for utilizing otherwise waste heat for
heating water for feeding a Boiler or for other purposes; such water heaters are
sometimes termed "fuel economizers."
This Invention has for its object to so construct the said heaters that they are
much stronger and lighter than are those hitherto constructed wherein it has been
usual to use cast iron tubes and cast iron chambers for them to communicate with
at top and bottom A heater constructed according to this Invention presents the
further advantage of being readily accessible for inspection cleaning and repairing-
We will describe the Invention with reference to the accompanying drawings
Figure 1 being a longitudinal section Figure 2 a transverse section and Figure 3
a part plan and part horizontal section of a heater arranged according to this
Invention.
According to this Invention the tubes A A are made of wrought or drawn metal
and they are inserted at top and bottom into chambers B B also made of wrought or
drawn metal The tubes may be made in a single row or in groups of two or three
rows the row or both or all of the rows being inserted into or connected with the said
chambers B which extend at top and bottom of the said series as shewn. A number
of such series of tubes A inserted into or connected with top and bottom chambers B
are placed together side by side so that there may be a space (as at C) between each
such series sufficient to enable a person to pass between adjacent series to inspect
repair clean or remove and replace the tubes A. The chambers B are by preference
made of a capacity sufficient to enable a person to enter to clean or inspect the
tubes from the interiors of the said chambers The tubes may be inserted into the
chambers B by openings formed therein and covered by suitable tight covers secured
by a cross bar and screw or otherwise as shewn at b and the tubes may be fixed into
or to the chambers by expanding them into the tube holes as shewn for example in
Figure 4. A suitable number of these tubes may be threaded and provided with lock
nuts without and within the top and bottom chambers as shewn at d thus making
these pipes to act as stay or strengthening tubes-The ends of the said tubes may be
flanged and secured by bolts or rivets with the invervention of a filling ring or
collar e as shewn in Figure 5 so that by removing the rivets or bolts the said ring
or collar can be knocked out and leave the tube free to be readily removed.-Or we

page_text: may make the ends of the tubes plain and secure them in socket pieces bolted to the
chamber B with the intervention of a packing ring as shewn at Figures 6 and 7.
These fastenings may be the same both at top and bottom.
The mud which accumulates in the lower of the chambers B may be removed by
raking it out from tightly closeable end openings provided with covers which can be
opened for the purpose-The tightly covered openings when provided in the
chambers beneath and above each tube or any convenient number of them will enable
the interiors of the tubes to be cleaned these openings serving also to allow the
tubes to be inserted and withdrawn as aforesaid. The covers of these openings are
preferably placed inside the openings as shewn so as to avail ourselves of the internal
pressure to keep them closed-The holes in the upper chamber for the tubes to be
fixed in are preferably larger than those in the lower chamber to admit of the tubes
being more readily inserted.
I
To clean the exteriors of the tubes I provide scrapers or cleaners as shewn at f
(such as brushes or blades for instance) extending longitudinally of each tube and
fixed at top and bottom to toothed rings 7 capable of being rotated on the tubes so
that the scrapers cleaners or brushes move around and in contact with the exteriors
of the tubes and keep them clean. These scrapers cleaners or tubes may be driven
by any suitable means but a convenient arrangement is to provide each say of the top
rings with teeth by which the rings of the tubes in each row are geared together the
end ones being driven by worms on a shaft extending along the apparatus.
rings fixed to the tubes between which rings h the toothed rings g rotate.
The top and bottom chambers B communicate by the branches with connecting
pipes to the inlet and outlet for water. The tubes may be arranged horizontally
vertically or at any suitable angle.
are
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that what we claim is :-
First: In water heaters provided with tubes opening into chambers above and
below arranging the said tubes in groups or series so as to leave a space Û between
each series or group to allow of inspecting and repairing the tubes substantially as
hereinbefore described and illustrated in the accompanying drawings.
Second The means for cleaning the exteriors of the tubes substantially as herein-
before described and illustrated in the accompanying drawings.
Third: The water heater as a whole constructed as described and as shewn in the
accompanying drawings with or without the means for cleaning the tubes.
Dated the 3rd day of September 1888.