An Improved Spark Arrester.
Year: 1897

page_text: Date of Application, 5th Jan., 1897-Accepted, 6th Feb., 1897
An Improved Spark Arrester.
We, HEINRICH PASLER, Engineer, of 13 Gieselrecht Strasse, Stettin, and
PAUL HAGEMANN, Editor, of 12 Turner Strasse, Stettin, both in the Kingdom
of Prussia, and Empire of Germany, 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 a spark arrester for locomotives, traction engines and
the like and consists in the provision in the smoke box, funnel or other convenient
part of series of tubes so disposed as to be out of pitch or alignment.
In the accompanying drawings ;-
Figure 1 is a longitudinal section of a funnel or chimney arranged in accordance
with our invention while,
Figure 2 is a sectional plan looking upon the topmost series of tubes.
In carrying our invention into effect we provide upon the chimney S a plate A¹
which carries a group of short tubes B¹. The straight portions of the tubes
(which may consist of old boiler tubes) are arranged most simply parallel, they
may however be of other than round cross sectional form, bent, curved or conical.
This group of tubes which should have a clear passage area of at least the same
cross sectional area as that of the chimney, is provided for the passage of the
current of issuing products of combustion, and the several branch currents assume
the direction of such guide tubes.
A number of the red hot particles of the fuel carried along by the gases of
combustion, will at once be caught by the tubular sieve, and will become
extinguished.
On issuing from the group of tubes B' the products of combustion meet a second
tubular sieve A2 B2, which is in general constructed similarly to the sieve A¹ B¹, with
the difference that in the former arrangement the pitch or alignment of the tubes
alternates with that of the latter arrangement; that is to say, a closed space
in A' B2 is situated opposite to an open cross section of tube in A' B'. The red
hot sparks contained in the gases of combustion, on issuing from the tubes B¹ follow
for a certain time the direction that was imparted to them thereby, and in their
further course, they pass in between the tubes B' and strike against the base
plate A and become caught and extinguished thereby..
The lighter gases experience only an inconsiderable deflection in the direction
of their movement to the extent of half the pitch of the tubes so that they are
enabled to pass almost uimpeded out through the tubes B'.
The extinguished sparks are caught in the intermediate chamber K¹.
Single sparks or particles of coal which may find their way through the tubes B³,
are thrown against the dish or plate C and are collected in the second chamber K³.
When the sparks are few, there may be substituted for the dish C a wire sieve, or
the dish C may be omitted altogether; in which case the gases of combustion pass
almost axially through the chimney. The tubular sieve A B³ may be arranged
so as to be adjustable relatively to the sieve A¹ B' with the object of enabling
the distance between the two sieves to be adjusted to suit the nature of the
sparks.
The dimensions of the several tubes may also be determined according to the
properties of the fuel and of the products of combustion. When there is a very

page_text: considerable production of sparks, such as for instance when firing with saw dust
or chips, or small brown coal, (lignite), it may in some cases be necessary to provide
a third tubular sieve, which is similarly arranged to alternate as regards pitch or
alignment with the preceding sieve.
Instead of arranging the tubular sieves in the chimney as shown in the drawing,
the arrangement for locomotives and other applications may be such that the device
is arranged in the smokebox immediately below or around the exhaust pipe orifice
at any desired distance therefrom.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is ;-
A spark arrester arranged in such a manner that in smoke box or in enlarge-
ments of chimney flues or tubes, there are arranged groups of tubes which are
fixed in plates said groups being arranged above one another in such a manner
that the several tubes of the groups are pitched so as to alternate relatively to
· each other substantially as and for the purpose described.
.תנ..ת
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, Agents.