An Improved Method of and Apparatus for Carrying Off the Chimney Smoke of Railway Trains, Steamboats, and the like.
Year: 1893

page_text: Date of Application, 8th Nov., 1893-Accepted, 16th Dec., 1893
UUMI LEID SIDOLFICATION.
An Improved Method of and Apparatus for Carrying Off the
Chimney Smoke of Railway Trains, Steamboats, and the like.
A communication by LUDWIG DÖHMER, of 102, Blumenthalstrasse, Crefeld, in
the Empire of Germany, Machine Manufacturer.
I, WILLIAM PHILLIPS THOMPSON F.C.S., M.I.M.E., of the Agency for
Foreign Patent Solicitors, 6 Lord Street, Liverpool and 6, Bank Street,
Manchester both in the County of Lancaster and 323 High Holborn, in the
County of Middlesex, Civil 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 :—
In railway trains and steamers hitherto, the smoke given off by the chimney or
chimneys has, in consequence of the forward movement of the vehicles, come down
on these latter, which renders the air impure, and also, owing to the ejection of
unconsumed glowing pieces of coal, is the cause of frequent fires in woods and
the like.
This invention has for its object to remove all these drawbacks, and this is
attained by conveying the smoke evolved by the chimney through a series of tubes
or pipes arranged, in the case of railway trains, on the carriages in such a way
that the smoke escapes into the outer air when its descent is no longer troublesome.
Whilst the smoke is passing through the series of tubes, the unconsumed small
pieces of coal carried along with it become cooled so that they no longer cause
conflagrations.
The tubes or passages may also be so arranged that not only is the smoke carried
off but, by an action similar to that of the jet apparatus or exhauster cowls, an
increase in the draught of the chimney is obtained as will be hereinafter more
particularly described.
A railway train fitted with this arrangement of pipes will now be more particularly
described, reference being made to the accompanying drawings, on which :-.
Figure 1 is an elevation of such a railway train :
Figure 2 is another form of connection between the tubes or passages and the
chimney, and shows the arrangement of an exhaust cowl.
Figures 3, 4, 5 and 6 are various forms of construction of the separate parts of
the tubes with their connections.
A removable curved piece a is arranged on the chimney or funnel of the loco-
motive, Figure 1, which piece, a, is connected at one end with the mouth of the
chimney and at the other end with a tube b arranged on the locomotive. On each
separate carriage, a tube fof suitable corresponding dimensions is secured, and
this tube has at its ends connecting pieces, formed in the following manner :-
A tubular end c is adjustably arranged like a buffer in the tubes for b, and this
buffer end is always pushed outwards by means of springs h. By means of the
buffer-like form of construction of the contact parts, the system of tubes or passages
forms a whole and is in no way affected when the train is passing round curves.
The smoke passes from the chimney of the locomotive through the curved piece a,
thence into the tube b and then through the tubes f
In the modification shown in Figure 2, the draught of the chimney is increased
by the following arrangement :-
The pipe a is, in this case, straight and shaped at the top like a cowl p, or bell

page_text: mouthed, which opens in the direction in which the train is travelling. The
connection of the separate tubes remains the same.
The mode of working is as follows:-
During the forward movement of the train, a strong current of air enters the
cowl or bell mouth p in the direction of the arrow r, and carries with it the smoke
emerging from the chimney, and conveys the latter through the series of pipes
until, at a suitable place, generally at the rear of the vehicles, it is discharged into
the air, the unconsumed particles of coal which may be carried along in the current
of air undergoing, in the long transit through the tubes, such a cooling that any
danger of fire is removed, and the cooling may also be 'accelerated by water being
spirted into the tubes. The draught of the chimney is increased by the strong
current of air, which enters the bell-mouthed shaped cowl, as in the well known jet
apparatus, the smoke being carried away with it.
In
Figures 4 and 5 show another form of the contact pieces c. In this case, the
connection of the separate tubes is formed in such a way that they exert of
themselves a jet action in a similar manner to an exhauster, like the cowl on
the chimney herein before described, the action of which they thus assist.
this case, the contact piece is formed with a bell mouth and placed over the
tube or the movement of each piece, when uncoupling the various carriages,
is done by hand. The wind may be prevented from pushing back the contact
pieces on the tubes by means of any suitable devices, and among them the
following
The hood itself is provided with projections 7, and the tube with corresponding
segments m, and, by slightly revolving the hood, these projections and segments
and m engage and prevent the hood being pushed back.
In many cases, it suffices, in order to establish the connection of the tubes
with one another, to simply place them end to end with sufficient space to allow
of the separate carriages being dealt with. In this case, the simple tube ends
assume the functions of the above mentioned pieces d, if the ends of the tubes
have a conical shape such as is shown in Figure 6.
It must also be understood that the bell-mouthed connection, herein before
described and shown in Figure 4, may be made at any suitable part of the length
by the said tubes being divided there and provided with suitable bell-mouthed
ends.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, as communicated to me by
my foreign correspondent, I declare that what I claim is :-
1. An improved method of carrying off the unpleasant and deleterious smoke
emitted by the chimneys of railway locomotives and steamships, characterised
by the smoke being conveyed into a series of tubes or passages, arranged, in
the case of railway trains, préferably on top of the carriages, substantially as
described.
2. In an apparatus for the purposes described, a continuous tube, or separate
ones connected together, in such a way that, on the forward movement of the
vehicle, the smoke is either automatically or by means of suitable assisting
devices, further carried along through the series of tubes and allowed to escape
into the outer air at a suitable point, whilst the glowing particles of coal carried
with the smoke are cooled during their long transit through the tubes and thereby
rendered harmless, substantially as hereinbefore described and shown on the
accompanying drawings.
3. In an apparatus for the purposes described, providing the tubes at suitable
points with bell-mouthed or exhaust ends in such a way that, during the movement
of the train, an automatic constant suction is produced by which the smoke is
drawn in and carried away, and also the draught of the chimney is increased,
substantially as described and shown.

page_text: 4. In an apparatus such as described, forming the ends of the separate tubes b
or with either adjustable sockets e resembling buffers or movable or fixed bell-
mouthed ends d with the object of enabling a rapid and convenient connection of
adjacent parts to be made, substantially as described and shown.
Dated this 7th day of November 1893.
WM. P. THOMPSON & Co.,
Agents for the Applicant.