Improvements in and connected with the Grates of Boilers, Muffles, and Furnaces.
Year: 1895

page_text: Date of Application, 13th Mar., 1895
Complete Specification Left, 11th Dec., 1895--Accepted, 18th Jan.,
1896
PROVISIONAI, SPECIFICATION.
Improvements in and connected with the Grates of Boilers, Muffles,
and Furnaces.
I, ZEPHANIAH WILLIAM BAUGH of 12 Bratt Street West Bromwich, in the
County of Stafford Manufacturer, do hereby declare the nature of my said
invention to be as follows:-
:-
My invention has for its object improvements in and connected with the grates
of boilers, muffles, and furnaces, and refers more particularly to the bridges of
such grates by which the smoke is more perfectly consumed, the doors of such
grates are also made perfectly airtight by my invention.
In carrying my invention into effect I form the first part of my bridge with a
number of small apertures through that part which is below the grate and at top of
same level with the bars I provide an shaped flange which is supported by two
suitable webs. Behind this I build the back part of the bridge solid with an
intermediate space between the front and back part which space is narrowed by
the before mentioned flange so that the air passing through the apertures
accumulates and then obtains an impetus as it mixes with the gases above the
bridge. A door is formed at the bottom of the bridge to enable the dirt to be
removed from the centre part of the bridge and the supporting webs or supports
are hollowed out in the case of tubular boilers to allow the dust and soot to fall
from sides to centre. The bridge may be fitted close to boiler or in case of more
air being required may be so supported upon carriers or rests which may be made
adjustable to any position. The front part of my double bridge acts as an air
accumulator while the back part prevents the cold air from passing through the
tube and conveys it in an upward direction thus creating a flame on top behind the
bridge.
In the case of the doors which are adaptable to all kinds of boiler furnaces I
provide a pair of grooved runners which are bolted on each side of the opening
to grate the door having rebated sides the rebate or projection of which slides in
the grooves thus forming a perfectly airtight door which cannot wedge or swing
out of position. The sliding pieces are made adjustable by pins & nuts with slots
so that allowance can be made for expansion.
Dated this 19th day of March 1895.
GEORGE BARKER,
77 Colmore Row, Birmingham, Agent for Applicant.
Improvements in and connected with the Grates of Boilers, Muffles,
and Furnaces.
I, ZEPHANIAH WILLIAM BAUGH, of 12 Bratt Street, West Bromwich, in the
County of Stafford, Manufacturer, do hereby declare the nature of my said
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 has for its object improvements in and connected with the grates

page_text: +
of boilers, muffles and furnaces and refers more particularly to the bridges of such
grates by which the smoke is more perfectly consumed while the doors of such
grates are also made perfectly air-tight by my invention.
In carrying my invention into effect I form the front part of my bridge with a
number of small apertures through that part which is below the grate and at top
of same level with the bars I provide an L shaped flange which is supported by
two suitable webs. Behind this I build the back part of the bridge solid with an
intermediate space between the front and back part which space is narrowed by
the before mentioned flange so that the air passing through the apertures
accumulates and then obtains an impetus as it mixes with the gasses above the
bridge. A door is formed at the bottom of the bridge to enable the dirt to be
removed from the centre part of the bridge and the supporting webs or supports
are hollowed out in the case of tubular boilers to allow the dust and soot to fall
from sides to centre. The bridge may be fitted close to boiler or in case of more
air being required may be so supported upon carriers or rests which may be made
adjustable to any position. The front part of my double bridge acts as an air
accumulator while the back part prevents the cold air from passing through the
tube and conveys it in an upward direction thus creating a flame on top behind the
bridge.
In the case of the doors which are adaptable to all kinds of boiler furnaces I
provide a pair of grooved runners which are bolted on each side of the opening to
grate, the door having rebated sides, the rebate or projection of which slides in
the grooves thus forming a perfectly air-tight door which cannot wedge or swing
out of position. The sliding pieces are made adjustable by pins and nuts with
slots so that allowance can be made for expansion.
In order that my invention may be clearly understood and easily carried into
practical effect I have appended hereunto a double sized sheet of drawings upon
which I have illustrated the same as applied to a single tubed boiler but it will be
clearly understood that it may be applied to almost any kind of boiler or other
furnace without difficulty.
Figure 1. is the front elevation of a boiler B showing my new bridge A in its
position in the tube b'.
Figure 2. is a broken off longitudinal vertical section through the boiler B and
its tube b', as also through the centre of the bridge A.
Figure 3. is a perspective view of the bridge A to an enlarged scale.
Figure 4. is a perspective view of my new door E and its frame K which is
adaptable to many parts of furnaces.
Figure 5 is a broken off cross section of the door E and frame K on line 1-2,
Fig. 4.
Figure 6 is a section of the bridge door a¹ showing the mode of hanging it.
My bridge is hollow being composed of the front A and back a with the
intermediate pieces a which may have projecting feet a when it is not desired
that the bridge should exactly fit the boiler tube b¹. The ledge a' is for the
bridge fire brick front and may also be used as a rest for the end of the furnace
bars. The door a¹ is hung upon the stationary pin a' which is fastened in the
luge a³, a³ by hook slot holes all formed by the lugs at which are cast or formed
upon the door al as seen in section at Figure 6. It will be noticed that the
front A of the bridge is perforated with any desired number of holes a through
which the air passes in fine jets and after circulating in the space S rises up
between a and as when it meets the smoke and heated gasses as they pass over the
front of the bridge so igniting them and turning them into flame as they pass
into the flue in the direction of the arrows. The intermediate pieces a are cut
away at a to allow the dust which falls into the bridge to pass to the bottom of
the boiler flue and so be cleaned out through the bridge door a'.
The furnace door: E with its frame K is so constructed as seen in section
Figure 5 that a double sealing is effected by means of the loose strips of metal k
which are fixed upon the frame by the bolts working in slot holes in k so that

page_text: they may be adjusted, and the tongue e¹ works also in the rebated groove k³
formed in the side pieces k³ of the frame K. The projecting pieces ¹ serve to
fasten the frame K in the brickwork as also the flange of the back plate k.
Slot holes e may be formed in the door E as shown, for the purpose of fixing &
handle thereto.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what I
claim is :-
:-
1st. The improvements in and connected with the grates of boilers, muffles and
other furnaces substantially as herein set forth and as shown upon the
accompanying drawings.
2nd. The improved bridge A having its air space S and divisions a² and door a
and with the air holes as and other parts substantially as herein explained and
shown upon the drawings.
3rd. The general furnace door E with its frame K and extra sealing and
adjustable side pieces substantially as explained and shown.
Dated this 10th day of December 1895.
GEORGE BARKER,
77 Colmore Row, Birmingham, Agent for Applicant.