CERTAIN IMPROVEMENTS. IN STEAM BOILER FURNACES
Year: 1886

page_text: ошондо
I, ALEXANDER HENRY REED, of Suffolk House, Laurence Pountney Hill, Cannon
Street in the County of Middlesex, Engineer do hereby declare the nature of
Baid invention for CERTAIN IMPROVEMENTS. IN STEAM BOILER FURNACES, and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
This invention has for its object to introduce heated air into the flame of steam
boilers of that class which have metallic fire boxes situated in the interior of the
boiler. The novel and peculiar construction of the devices which constitutes this
invention, is pointed out in the following specification and claims and illustrated
in the accompanying drawing in which
Fig. 1 represents a transverse vertical section in the plane x x, fig. 2.
Fig. 2 is a longitudinal vertical section.
Fig. 3 is a transverse section of the air distributor on a larger scale than the
previous figures.
Fig. 4 is a longitudinal section of the same.
Similar letters indicate corresponding parts.
In the drawing the letter A indicates the outer shell of a steam boiler, and B, C,
are the fire flues, the front ends of which form the fire boxes D D, each of which
is provided with a door E and with a fire grate F. To the front wall of each fire
box are secured two brackets G G and on the top of each fire box are fastened two
suspension devices H, H, the brackets serving to support the front ends of the air
distributors I, I, while the suspension devices serve to support said air distributers
near their rear ends. The suspension devices illustrated in the drawing consist of
pins a, which are supported by lugs b, secured to the top of each fire box, and
which engage with ears c projecting from the tops of the air distributers and they
are so constructed that they are able to yield if the air distributers expand or
contract by the changes of the temperature to which they are exposed, the front
ends of said air distributers being placed loosely upon the brackets G G to allow
such expansion and contraction. By referring to fig. 3, it will be seen that these
brackets are concave, so that the air distributers are not liable to slip off if the
boiler is used on a locomotive or in a steamship.

page_text: Said air distributers consist of boxes made of cast iron or other suitable
refractory material and their cross section is by preference circular or oval as
shown in the drawing. They are perforated with a large number of holes or air
passages and the air passages in their sides are flaring downward so as to throw
the jets of air issuing from the same downward into the flame and cause the same
to mix with the unconsumed gases rising from the fuel on the fire grate. By
referring to fig. 2 it will be seen that the air distributers extend throughout the
entire length of the fire box or nearly so, and two air distributers in each fire box
are shown but in some cases one air distributer may be sufficient, and in others it
may be desirable to use three or more such air distributers in one and the same
fire box.
Each air distributer connects with an air supply pipe J. In the example shown
in the drawing, the air supply pipe extends from the rear end of each air distributer
through the entire length of the fire flue and out into the open air, but in case the
boiler is used on a locomotive, said air distributer may be made to extend up
through the smoke chamber K at the rear end of the boiler and out into the open
air at the sides of the smoke stack. In all cases however the air pipes J are so
arranged that the air in passing through them to the air distributers, becomes
heated to a high temperature, which is of great advantage. If desired the air
supply pipes may be connected to a fan blower or other air forcing apparatus.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
I claim is:
1. The combination with a steam boiler and with its metallic fire box, of a
bracket secured to the front wall of the fire box, a suspension device secured to
the top of the fire box, an air distributer having its front end resting upon the
bracket and being supported at its rear end by the suspension device and an air
supply pipe, substantially as described.
2. The combination with a steam boiler and with its fire box, of an air dis-
tributer located in the interior of the fire box and provided with downwardly
flaring air jets, a bracket constructed to support the front end of the air distributer,
a suspension device constructed to support the rear end of the air distributer, and
an air supply pipe for the air distributer, substantially as described.
Dated this fifteenth day of June 1886