Improved Method of and Means Employed for Utilising Exhaust or Waste Steam from Stationary Engines, Applicable to Drying and Heating Purposes.
Year: 1887

page_text: Date of Application, 28th Dec..
1857.
Complete Specification Left, 24th Sept., 1888
• Complete Specification Accepted, 26th Oct., 1888
Improved Method of and Means Employed for Utilising Exhaust or
Waste Steam from Stationary Engines, Applicable to Drying and
Heating Purposes.
I GEORGE STEWART LOUDON, of Violet Bank, Newmains, Lanarkshire, Brick,
Tile and Earthenware Manufacturer, do hereby declare the nature of this invention to
be as follows:-
My invention in its primary application relates to the utilization of waste or exhaust
steam from stationary engines in connection with the manufacture of pottery ware,
bricks, tiles, earthenware pipes and other earthenware or pottery goods, as also for
drying purposes generally. My invention may also be utilised with advantage for
heating Halls, Churches, Greenhouses, Poultry houses, and other buildings.
It forms an essential feature in my Invention that a large superficial area of
radiating surface is obtained without causing any appreciable back pressure upon the
piston of the steam engine in connection with the apparatus.
In carrying out my Invention, I use a main steam pipe, arranged to form a figure
corresponding to the conformation of the floor of the drying or heating building.
Connected to said main pipe, and enclosed within the figure formed by it, is a series
of parallel pipes, connecting any two sides of the figure formed by the main pipe
aforesaid. The main pipe inlet is connected to the exhaust of the engine, a branch
pipe serving to supply main steam from the boiler, when drying or heating is required
during the time that the engine is shut down. The outlet from the main pipe before
referred to, is conducted to the boiler well, from whence the feed water is obtained.
The main pipes and parallel connecting pipes aforesaid would preferably be made of
glazed fireclay. I may however, employ metal as the material for said pipes, the
joints in both cases being of the usual spigot and faucet formation, and made water and
steam tight by means of a cement filling, when earthenware pipes are used, and an
ordinary rust or red lead joint in the case of iron pipes-I protect the latter from
external oxidisation by coating them with a suitable bituminous or mineral paint or
other preventative against oxidisation. I also arrange the jointing of the several

page_text: lengths of pipe in such a manner that the lowest end is nearest to the outlet, so that
all draining of water due to condensation must flow into the well before referred
to. Said pipes are filled in between the interstices with broken bricks, "shivers" or
any other incombustible debris that will allow of the necessary expansion-Over the
above filling, I lay a bed of concrete which forms the floor of the building.
I interpose a stop valve between the exhaust pipe leading from the engine and the
main pipe of the drying floor, so that should it be required, steam may be used direct
from the boiler, in which case the engine would be disconnected from the steam
pressure entirely.
From the foregoing, it will be seen that the steam after performing its functions in
the Steam Engine, instead of being dissipated into the atmosphere as heretofore, is
allowed to circulate through a series of pipes in which it is confined prior to its exit
therefrom into the boiler well.
JAMES STEVENSON,
Gray's Inn Chambers,
20, High Holborn, W.C.,
Agent for Applicant.

page_text: Improved Method of and Means Employed for Utilising Exhaust or
Waste Steam from Stationary Engines, Applicable to Drying and
Heating Purposes.
1, GEORGE STEWART LOUDON of Violet Bank, Newmains, Lanarkshire, Brick, Tile
and Earthenware Manufacturer, 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 in its primary application relates to the utilization of waste or exhaust
steam from stationary engines in connection with the manufacture of pottery ware,
bricks, tiles, earthenware pipes, and other earthenware or pottery goods, as also for
drying or seasoning wood and for drying purposes generally. My Invention may also
be utilised with advantage for heating Halls, Churches, Greenhouses, Poultry houses
and other buildings.
In accordance with my Invention the waste or exhaust steam after having performed
its functions in the steam engine instead of being allowed to escape into the atmosphere,
is caused to circulate through a series of specially constructed pipes hereinafter
described, in which its remaining heating powers are expended prior to its exit there-
from into the boiler well or feed reservoir. It forms an essential feature in my
Invention that a large superficial area of radiating surface is thus obtained, without
causing any appreciable back pressure upon the piston of the steam engine that may
be employed in connection with the apparatus.
In order that my Invention may be the better understood I have appended the.
accompanying sheet of drawings in which Figure 1 is a plan showing my Invention'
as employed in its primary application to the heating of stoves, kilns, or the like,
employed in the manufacture of earthenware and pottery goods. Figure 2 is an
enlarged sectional view of the floor and heating pipes, and Figure 3 is a sectional view
of a modified form of pipes to those illustrated in Figure 2.
In carrying out my Invention 1 employ a main pipe A to form a figure corresponding
to the configuration or outline of the floor of the drying or heating building. Con-
nected to said main pipe A, and enclosed within the figure forined by it, is a series of
parallel pipes B connecting any two sides of the figure formed by the main pipe aforesaid.
The main pipe inlet is connected to the exhaust of the engine by means of the pipe C,
a branch pipe D serving to supply the steam direct from the boiler when drying or
heating is required during the time the engine is not in use.
The outlet from the
main pipe before referred to, is conducted to the boiler well from which the feed water
is obtained. interpose between the exhaust pipe C leading from the engine and the
main pipe A of the drying floor, a stop cock E, so that when desired the engine may
be disconnected entirely and steam be used direct from the boiler by way of the branch
pipe D and stop cock F.
The main pipes A and parallel connecting pipes B may be glazed fire clay pipes of
special material, or may be of iron, the joints in both cases being of the usual spigot

page_text: and faucet formation, and made steam and water tight by means of cement filling-when
earthenware pipes are employed, and an ordinary rust or red lead joint in the case of
iron pipes. I protect the latter from external oxidisation by coating them with a
suitable bituminous or mineral paint or other preventative against oxidisation. Said
main pipes and parallel connecting pipes are filled in between the interstices, with
broken bricks, "shivers" or any other incombustible debris, that will allow of the
necessary expansion, as shown at a Figures 2 and 3. Over the above filling a I lay
a bed of concrete b which forms the floor of the building, stove, or kiln to be
heated.
I also arrange said pipes in such a manner that the lowest end is nearest to the
outlet, so that all draining of water due to condensation must flow by way of the
pipe A¹, into the boiler well before mentioned. I do not however confine myself to any
particular position of the outlet for the exhaust steam-confined within the pipes B-
as said outlet may be arranged at any convenient point to meet the requirements
according to the arrangments of the works or buildings where my improvements may
be adopted.
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 :-
The improved method of heating stoves, kilns or the like, employed in connection
with the manufacture of pottery or earthenware, and for other drying or seasoning
purposes, or for heating purposes, substantially as herein set forth.
On tod
1000
Unted HRK DERAN
Septemb
1000
1000
JAMES STEVENSON,
Gray's Inn Chambers,
20, High Holborn, London, W.C.,
Agent for Applicant.
JAMES
STEVENSON,
Gray's Inn Chambers,
20, High Holborn, London, W.C.,
Agent for Applicant.