Spark-ar-rest′er.
A device placed upon the chimney of a locomotive or a portable engine, to prevent the passage of sparks from the chimney.
Also called a
spark-consumer. It has usually a wire cage to prevent the passage of sparks, but, in order to prevent impairing the draft, it is usual to depend upon catching the sparks after the first rebound and collecting them in some place out of the danger of being again carried away by the draft.
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Spark-arrester. |
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Spark-arrester. |
In
Fig. 5345, the inner casing forms a hood over the pipe, and is covered with wire gauze, below which is suspended a conical deflector, by which the sparks are directed downward into the inner casing, from whence they pass into the reservoir below through the annular opening between the pipe and the casing.
Fig. 5346 is a view of a chimney-cap designed for portable engines for thrashing, where there is danger of communicating fire.
The draft carries the smoke and sparks directly upward through the pipe
a against the fine wire-netting, whose meshes are too small to allow sparks to pass.
They rebound to the inclined conveyor
b, and gravitate through the cinder-pipe
c to a receptacle on the ground.
