A New or Improved Appliance for Preventing the Risk of Fire by Overheating the Flues of Hot Water Boilers, and for Utilising the Waste Heat therefrom.
Year: 1893

page_text: Date of Application, 26th July, 1893
Complete Specification Left, 26th Apr., 1894-Accepted, 16th June, 1894
PROVISIONAL SPECIFICATION.
A New or Improved Appliance for Preventing the Risk of Fire by
Overheating the Flues of Hot Water Boilers, and for Utilising
the Waste Heat therefrom.
I, WILLIAM WILSON of 50 King Street, Manchester, Heating Engineer do
hereby declare the nature of this invention to be as follows:-
This invention relates to an appliance to be employed in conjunction with new
or existing hot water boilers the object of which appliance is to prevent the over-
heating of the flue by the waste products of combustion from the said boilers and
the consequent danger of fire therefrom and furthermore the utilisation of the said
waste products.
The appliance which I employ for the above purposes consists of an outer water
tight shell or casing of wrought or cast iron, copper or other like suitable material
filled with water and in communication by flow and return pipe with the boiler and
through this casing and surrounded by the water contained therein I carry the flue
from the said boiler the said flue entering at or near the top of the said casing.
That portion of the flue which is enclosed within the casing is provided with two
vertical arms or branches down one of which the waste products of combustion
pass on entering that portion of the flue enclosed in the casing and ascend upwards
along the other branch or arm and thence to the chimney along the remaining
portion of unencased flue, disposing on their way of their heat to the water
contained in the said casing.
In carrying out my invention I may mount the above appliance on a suitable
base forming a chamber through which the products of combustion shall pass
after descending one arm or branch of the flue and before ascending the other
branch. This base or chamber is provided with a door for the removal of the
soot which will accumulate within the flue.
It will be seen that by employing my improved appliance in conjunction with
new or existing vertical hot water boilers the danger of the flue becoming over-
heated is obviated and the heat which would otherwise be wasted is utilised in
the manner hereinbefore described.
Although hereinbefore described as applied in communication, by flow and
return, with the boiler I may disconnect the same and utilise the water in the
said appliance for supplying a separate system to that supplied by the water in
the boiler. I may also use a different "quality" of water (for instance dirty
water) in the appliance and at a different pressure to that in the boiler.
Dated this 25th day of July 1893.
WILLIAM WILSON.
COMPLETE SPECIFICATION.
A New or Improved Appliance for Preventing the Risk of Fire by
Overheating the Flues of Hot Water Boilers, and for Utilising
the Waste Heat therefrom.
I, WILLIAM WILSON of 50 King Street, Manchester, Heating Engineer 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 consists in apparatus employed in conjunction with ordinary

page_text: hot water boilers and which has for its object to prevent the risk of fire from the
over-heating of the flue from such boilers and for utilizing the waste heat
therefrom.
In order to enable my invention to be the better understood I have hereunto
annexed a sheet of drawings illustrating my improved apparatus as applied to a
vertical hot water boiler, and I will proceed to describe the same with the help of
the figures and letters of reference marked thereon.
Fig. 1 is an exterior view Fig. 2 a section of the same and Fig. 3 a sectional
plan.
My improved apparatus consists of an outer casing A containing water and
communicating by flow and return pipes B and C with the boiler D and through
which casing A is carried the flue pipe E from the boiler D.
The products of combustion passing along the flue pipe E enter the casing at
the inlet orifice F and descending the branch pipe E and ascending the branch
pipe E leave the casing at the outlet G from thence they pass along the flue
pipe E in the ordinary manner.
It is obvious that as the branch pipes E1 and E2 within the casing A are
completely surrounded by water, any danger from over-heating of the said flue is
entirely obviated and the heat from the waste products of combustion is utilized in
heating the water contained in the said casing, which casing practically forms a
supplementary boiler to the boiler D.
Having thus particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
In combination with an ordinary hot water boiler the use and employment of a
supplementary chamber or casing through which passes the flue pipe from the said
boiler in the manner and for the purposes herein described and illustrated.
Dated this 25th day of April 1894.
EDMUND WILSON,
Agent.