Improvements in Steam Generator Furnaces.
Year: 1895

page_text: Date of Application, 9th Oct., 1895-Accepted, 15th Feb.,
1896
CUMPLEID DI COITICATION.
Improvements in Steam Generator Furnaces.
I JOHN BRYCE of 66 Park Street Southwark in the County of London
Gentleman 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 :-
My invention consists in an arrangement whereby I am able to prevent dust
cinders or other substances accumulating when boilers in factories and elsewhere
are heated in the ordinary manner.
I make my apparatus part of one of the sides of an ordinary furnace.
My apparatus consists of the combination of the implements below mentioned
in the manner described.
In the side which is most convenient for inserting the apparatus I make an
aperture and I insert at right angles to the plane of the bed of the furnace a
piece of iron or other fire proof material which piece of iron or other material
I make of the same size as the aperture. This piece of iron or other material is
then fixed at the top in any of the well known manners so that the bottom is
capable of being pushed in towards the centre of the furnace whilst the top portion
of the iron plate is held practically stationary. The bottom of the iron plate is
worked towards the centre of the furnace by a suitable ratchet arrangement from
the outside so that it can be adjusted easily to admit of the regulation of the size
of the portion of the aperture which it may be desired to leave open.
conjunction with this iron plate above described I arrange a series of tubes
communicating with the boiler but so that the water shall not be forced into
them; these tubes which should number not less than three I bring down into the
side of the furnace already referred to as having the aperture in it, and the said
tubes should be brought through such side so that they are slightly above the said
aperture, make a moderately acute angle with the inside portion of the side which
they pass through and point towards the bed of the furnace.
In
In the accompanying sheet of drawings Figure 1 is an elevation of a boiler
setting with my invention applied to the furnace doors thereof, and Figure 2 is a
longitudinal sectional elevation of same. It will however be understood that my
invention may be applied to the sides of the furnace instead of to the doors in the
front thereof as shown.
A represents the boiler, B the steam dome of same, E the furnace provided with
fire bars F and bridge G. H are openings formed through the furnace front, and
provided externally with the hinged fire doors I. Each fire door I has an
opening K formed in it. Behind this opening K is placed a swing plate L
which is hinged at its upper edge to the upper part of the door I so that it can be
opened inwards more or less, and be held in any desired position by means of a
rack M the teeth of which engage with a suitable stop, such as the lower edge of
the opening in the door I for example as shown in Figure 2.
N is a steam pipe supplying one or more steam jets or nozzles P, which pass
through the furnace front slightly above the opening H, and are inclined
downwards towards the fuel on the firebars. Each jet or nozzle P should be
provided with a tap or valve to regulate the supply of steam to it.
It will now be understood that when the fire door I is closed and the plate L
stands in a perpendicular position the opening K in the firedoor is closed, and no
air can enter the furnace above the fuel through the opening H; but by turning

page_text: the plate L inwards on its hinge more or less, as illustrated in Figure 2, a
proportionate quantity of air will be admitted through the opening K in the fire
door and through the opening H into the furnace E above the fuel on the bars F.
When steam is turned on to the jets or nozzles P it draws in atmospheric air
through the opening left by the plate L and forces such air down into contact with
the fuel on the grate, thereby promoting complete combustion of such fuel which
prevents the accumulation of dust, cinders, etcetera, and the production of smoke.
The plate L has to be adjusted so as to regulate the quantity of air admitted to
suit the quantity of fuel consumed on the bars. Part of the air to support
combustion may be admitted as usual into the ash pit below the fire bars through
the registers Q, or otherwise.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed I declare that what I
claim is :-
A fire door having an opening through it covered with an adjustable hinged
plate, in combination with one or more steam jets or nozzles, substantially as
described and for the purposes specified.
Dated 8th Databas 1905