AN IMPROVED METHOD OF AND APPARATUS FOR PREVENTING THE ESCAPE OF SPARKS FROM LOCOMOTIVE, PORTABLE ENGINE, AND OTHER CHIMNEYS
Year: 1876

page_text: LETTERS PATENT to Sverror Hakon Lundh, of Christiania, Norway, now of
No. 8, Southampton Buildings, London, Engineer, for the Invention of
"AN IMPROVED METHOD OF AND APPARATUS FOR PREVENTING THE ESCAPE OF
SPARKS FROM LOCOMOTIVE, PORTABLE ENGINE, AND OTHER CHIMNEYS."
Sealed the 12th June 1877, and dated the 15th December 1876.
PROVISIONAL SPECIFICATION left by the said Sverrer Hakon Lundh at the
Office of the Commissioners of Patents on the 15th December 1876.
SVERRER HAKON LUNDH, of Christiania, Norway, now of No. 8, Southampton
Buildings, London, Engineer. "AN IMPROVED METHOD OF AND APPARATUS FOR
PREVENTING THE ESCAPE OF SPARKS FROM LOCOMOTIVE, PORTABLE ENGINE, AND
OTHER CHIMNEYS."
My Invention relates to a novel method of preventing the escape of sparks from
the chimneys of locomotive, portable, or other engines, and from other chimneys,
and to an apparatus or spark catcher, or spark extinguisher, to be applied to the
said chimneys.
In practising my Invention I place around the top of the chimney an open tank
exactly fitted to the chimney. Through a pipe, which is bent downward at its
upper end, I conduct boiling water from the boiler, which water ascends by the
pressure of steam in the boiler.
The water supply is regulated by a cock. Over the top of the aforesaid water
tank I place a top plate formed of sheet iron, or other suitable material, and fitted
with an angular ring.
The said top plate may be moved up and down by a rod and handle, and if
desired may bo adjusted to completely close the chimney and hot water tank. The
waste pipe is used to prevent the rising of the water over the edges of the hot-
water tank.
When hot water from the boiler ascends in the tank it evaporates as much froin
its own heat as from the heat of the chimney. The water is still further heated
on its way to the tank, as the pipe is led through the smoke box, where the fire
and smoke from the tubes are allowed to play around it.

page_text: When the spark extinguisher is to be used the top plate is at first fixed in the
most favorable height over the tank. The sparks ascending the chinney will be
thrown against the aforesaid top plate and the angular ring and whirled round in
the steam till they are completely extinguished, and they pass along with the smoke
or fall down in the water tank.
The exhaust steam, which in portable and locomotive engines generally is con-
ducted into the chimney to improve the draught, will not by reason of its dryness
extinguish the sparks, but this result is effected by the saturated steam from the
tank. The above description relates more particularly to a spark catcher for a
portable engine.
For locomotives some slight modifications may be necessary in the said apparatus,
as will be readily understood by persons conversant with such machinery; and I
use steam from the boiler in connection with hot water for filling the tank, thus
causing a larger supply of saturated steam in the top of the chimney.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by the
said Sverrer Hakon Lundh in the Great Seal Patent Office on the 15th June
1877.
SVERRER HAKON LUNDH, of Christiania, Norway, now of 8, Southampton
Buildings, London, Engineer. "AN IMPROVED METHOD OF AND APPARATUS FOR
PREVENTING THE ESCAPE OF SPARKS FROM LOCOMOTIVE, PORTABLE ENGINE, AND
OTHER CHIMNEYS."
My Invention relates to a novel method of preventing the escape of sparks from
the chimneys of locomotive, portable, and other engines, and from other chimneys;
it also relates to an apparatus which I term a spark catcher, and which is placed
on the chimney for the purpose of preventing the escape of sparks therefrom.
The manner in which my said Invention may be advantageously carried into
practise is fully explained in the following description by the aid of the Drawing,
which represents a vertical section of the upper part of a portable engine chimney
provided with my improved apparatus:-Around the top of the chimney a I place
an open basin or small circular tank b accurately fitted to the chimney. Through
a pipe c, which is bent downward at its upper end, I conduct water from the
boiler, which water is caused to ascend the said pipe by the pressure of steam in
the boiler.
The water supply is regulated by a cock. Over the top of the aforesaid water
basin I place an inverted basin or cup d, or a plate formed of sheet iron or other
suitable material, and fitted with an angular ring.
The said inverted basin or plate may be moved up and down by a rod e, which
is provided at its lower end with a suitable handle; and if desired this plate or
basin may be adjusted to completely close the chimney and the hot water basin b.
The waste pipe fis used to prevent the rising of the water above the proper level
in the hot water basin b.
When hot water from the boiler ascends into the hot water basin it evaporates,
partly by its own heat and partly by the heat of the chimney. The water is more-
over heated on its way to the hot water basin through the pipe c, as this pipe
passes through the smoke box, where the fire and smoke from the tubes are allowed
to play around it.
When the spark extinguisher is to be used the aforesaid inverted basin or cup,
or top plate, is first fixed or adjusted at the most favorable height over the hot
water basin b. The sparks ascending the chimney will be thrown against the top
and rim of the said inverted basin and whirled round in the stream till they are
completely extinguished, and they pass along with the smoke or fall down in the
water in the basin b.

page_text: The exhaust steam, which in portable and locomotive engines is usually con-
ducted into the chimney to improve the blast or draught, will not by reason of its
dryness extinguish the sparks, but this result, that is to say, the extinction of the
sparks, is effected in the most satisfactory manner by the saturated steam arising
from the basin or tank b.
Many attempts have been made to construct a really good spark extinguisher
for portable and locomotive engines, but none of them have heretofore to my
knowledge proved successful or satisfactory.
In applying my Invention to locomotives I use steam from the boiler in com-
bination with hot water for filling the aforesaid basin or tank, thus producing a
larger volume or supply of saturated steam at the top of the chimney.
Having thus fully described my said Invention, and the manner of performing
the same, I wish it understood that I do not limit myself to the particular form,
construction, or arrangement of the parts of my apparatus, as shewn in the accom-
panying Drawing, as the same may be varied or modified to adapt the said
Invention advantageously to locomotive or other chimneys, and I wish it understood
that I claim,-
First. The method above described of extinguishing sparks and preventing their
escape from a chimney by means of saturated steam.
Second. The apparatus comprising the hot water basin or tank and the inverted
basin or top plate, and their necessary adjuncts, arranged together and in com-
bination with the chimney, as above set forth.
In witness whereof, I, the said Sverrer Hakon Lundh, have hereunto set
my hand and seal, this Fifteenth day of June, in the year of our Lord One
thousand eight hundred and seventy-seven.
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TTATZON ITINDU