Year: 1899

page_text: THOMAS JAMES CODD, of "Woodside," Fillebrook Road, Leytonstone, in
the County of Essex, Engineers' Draughtsman, do hereby declare the nature
of this invention to be as follows:-
My invention relates to an improved system of heating buildings by means of
the utilization of exhaust steam from an engine or other motor, the object of
the invention being to minimize the back pressure which results in connection
with the ordinary system of exhaust steam heating, and to simplify the connections
and fittings used for such purposes.
In carrying my invention into effect I convey the exhaust steam from the
engine or motor through an exhaust main leading to the atmosphere, arranging
at a convenient point on this exhaust main a balanced non-return or reflux
valve which shall permit the steam to pass to the atmosphere, the balancing
arrangement enabling the valve to be readily moved from its seat for this purpose.
From a convenient point between the balanced reflux valve on the exhaust main
and the engines or motors I take off a branch or branches to supply the building
which is to be heated, and in. describing my invention I will assume that I have
taken one branch from the main exhaust as similar fittings and description would
apply for other branches taken from the same main.
From the main exhaust connection for the buildings I carry the steam through
a valve of any ordinary type and also through a separator as in ordinary systems
of exhaust steam heating that it may be purified before travelling through the
radiators. I continue my building main in any convenient direction through
the building, taking from it as usual pipes for supplying the radiators in the
different parts of the building any number of such pipes being used to suit
the number of radiators. I take a condensed steam pipe or main in the ordinary
manner, to which I connect the pipes supplying the radiators, this condensedl
steam pipe being arranged preferably with a certain fall in order to minimize
the friction of the condensed steam passing through it on its way to the point of
discharge.
From each radiator I take at one end a small air pipe exhausting the air
from the radiator, which air pipe makes a connection to the steam supply pipe,
a check or non-return valve, preferably balanced so as to facilitate easy opening,
being placed in each air pipe, so that when the radiator valve is shut off from
the supply no steam shall work back into the radiator.
The vacuum and condensed steam pump which I employ may be of any ordinary
type, and the connection from it delivers water to the boilers in any ordinary
way, or I may run the water of condensation to waste or into a condense tank
by allowing it to pass through a syphon so as to form a water seal with a
non-return valve placed in it to prevent the pressure of the external atmosphere
destroving the water seal.

page_text: The action of my balanced reflux valve in my open stand pipe or atmospheric
pipe is such that whilst the steam is in excess of that required for the heating
of the building it is then open, upon the steam becoming insufficient for this
purpose the reflux valve closes upon its seat and causes the steam to pass entirely
ihrough the supply pipes and coils instead of to the atmosphere. 1 may if so
required in order to assist the action of the exhaust steam when such exhaust
supply becomes insufficient in quantity to supply the radiators, and when, as a
result of such insufficiency, a slight suction effect is produced upon the exhaust
pipe from the open air, thereby closing the reflux valve place upon a live steam
connection a branch which admits steam so as to maintain the necessary pressure
within the exhaust mains for the requirements of the apparatus, but this is not
claimed as part of my invention, and is not essential to it. I use in connection
with this five steam connection any ordinary reducing valve for giving the
necessary amount of steam at a reduced pressure to suit the current which will be
required and the demands of the apparatus in use at any particular time.
I do not limit the application of my improved system of exhaust standing
main with balanced valve and air pipe connections from the radiators to the
supply pipes to any particular type of fitting, radiator or pump which may be
employed in connection with such system, but I modify the arrangement of parts
and fittings in connection with the same to suit the conditions of the building
that is to be heated and the form and type of apparatus which is to be employed
in connection therewith.
I may also employ my system as described for the purpose of heating water or
other fluids contained in reservoirs which will then act as surface condensers in
the same manner as the radiators and pipes in a building.
Dated this 28th day of March 1899.
MARKS & CLERK,
18, Southampton Buildings, London, W.C.,
13, Temple Street, Birmingham, and
25, Cross Street, Manchester, Agents.
Improvements in Exhaust Steam Heating Systems.
I, THOMAS JAMES CODD, of Woodside, Fillebrook Road, Leytonstone, in
the County of Essex, Engineers' Draughtsman, 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:-
My invention relates to an improved system of heating buildings by means of
the utilization of exhaust steam from an engine or other motor, the object of
the invention being to minimize the back pressure which results in connection
with the ordinary system of exhaust steam heating, and to simplify the connections
and fittings used for such purposes.
In carrying my invention into effect 1 convey the exhaust steam from the
engine or motor through an exhaust main leading to the atmosphere, arranging
at a convenient point on this exhaust main a balanced non-return or reflux
valve which shall permit the steam to pass to the atmosphere, the balancing
arrangement enabling the valve to be readily moved from its seat for this purpose.
From a convenient point between the balanced reflux valve on the exhaust inain
and the engines or motors I take off a branch or branches to supply the building
which is to be heated, and in describing my invention I will assume that I have

page_text: taken one branch from the main exhaust as similar fittings and description would
apply for other branches taken from the same main.
The accompanying drawing illustrates one method of carrying my invention
into effect.
From the main exhaust connection a for the buildings 1 carry the steam through
a valve of any ordinary type and also through a separator as in ordinary systems
of exhaust steam heating that it may be purified before travelling through the
radiators r, d. 1 continue my building main in any convenient direction
through the building, taking froin it as usual pipes for supplying the radiators
in the different parts of the building: any number of such pipes being used to
suit the number of radiators. I take a condensed steam pipe e or main in the
ordinary manner, to which I connect the pipes supplying the radiators, this
condensed steam pipe being arranged preferably with a certain fall in order to
minimise the friction of the condensed steam passing through it on its way to
the point of discharge.
The vacuum and condensed steam pump which I employ may be of any ordinary
type, and the connection from it delivers water to the boilers in any ordinary
way, or I may run the water of condensation to waste or into a condense tank
by allowing it to pass through a syphon f so as to form a water seal with a
non-return valve placed in it to prevent the pressure of the external atmosphere
destroying the water seal.
The action of my balanced reflux valve g in my open stand pipe or atmospheric
pipe is such that whilst the steam is in excess of that required for the heating
of the building it is then open; while upon the steam becoming insufficient for
this purpose the reflux valve closes upon its seat and causes the steam to pass
entirely through the supply pipes and coils instead of to the atmosphere. I may
if so required in order to assist the action of the exhaust steam when such
exhaust becomes insufficient in quantity to supply the radiators, and when, as
a result of such insufficiency, a slight suction effect is produced upon the exhaust
pipe from the open air, thereby closing the reflux valve place upon a live steam
connection a branch & which admits steam so as to maintain the necessary pressure
within the exhaust mains for the requirements of the apparatus, but this is not
claimed as part of my invention, and is not essential to it. I use in connection
with this live steam connection k any ordinary reducing valve 7, for giving the
necessary amount of steam at a reduced pressure to suit the current which will
be required and the demands of the apparatus in use at any particular time.
I do not limit the application of my improved system of exhaust standing
main with balanced valve and air pipe connections from the radiators to the
supply pipes to any particular type of fitting, radiator or pump which may be
employed in connection with such system, but I modify the arrangement of parts
and fittings in connection with the same to suit the conditions of the building
that is to be heated and the form and type of apparatus which is to be employed
in connection therewith.
I may also employ my system as described for the purpose of heating water or
other fluids contained in reservoirs which will then act as surface condensers in
the same manner as the radiators and pipes in a building.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed 1 declare that what
I claim is: --
1. The use in an exhaust steam heating system in which an opening is pro-
vided to the atmosphere of a balanced reflux or balanced back pressure valve
which closes such opening at all times when the pressure within the system is
below atmospheric pressure, substantially as and for the purposes herein before
described and as illustrated in the accompanying drawings.
2. The use in an exhaust steam heating system in which an opening is provided
to the atmosphere of a balanced reflux or balanced back pressure valve which

page_text: allows the steam to escape to the atmosphere when the pressure rises above that
of the atmosphere substantially as and for the purposes hereinbefore described and
as illustrated in the accompanying drawing.
1000
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.