Improvements in or relating to Furnaces of Steam Generators.
Year: 1897

page_text: Date of Application, 11th Mar., 1897
Complete Specification Left, 13th Dec., 1897-Accepted, 15th Jan., 1898
PROVISIONAL SPECIFICATION.
Improvements in or relating to Furnaces of Steam Generators.
We, ROBERT McIvor, Non-conducting Composition Manufacturer, and WILLIAM
TOUGH MCIVOR, Engineer, both of 215 Cleveland Street, Birkenhead, in the
County of Chester, do hereby declare the nature of this invention to be as
follows:
This invention relates to the furnaces of steam generators and has for its object
the protection of the furnace fronts, and the prevention of radiation of heat
therefrom.
As at present constructed, the furnace fronts and the baffle plates which are
fitted thereto are subjected to very intense heat and the wear and therefore the
cost of renewals is very great, and there is also considerable loss of heat by
radiation therefrom. According to our invention we overcome these objections by
providing, between the furnace front and the fire, an arch composed of segmental
fire-clay tiles which rest at each side on the deadplate; the front side of the
arch so formed abuts against the front plate, and its upper curved side fits the
under side of the crown of the furnace. The front corner formed by these two
sides is cut away so that only an annular portion of the front side abuts against
the front plate and only a portion of the width of the upper curved side fits
against the furnace, the tiles being made concave between these abutting surfaces;
this concave surface forms with the meeting portions of the furnace front and
the furnace an annular air space. Suitable passages formed in the sides of the
tiles lead from this air space to the furnace; this air space may be used with
advantage as an inlet for the forced draught when the latter is used.
The size of the arch thus formed is such as to leave a clear way into the furnace
corresponding to the door area, and the corners are well rounded off so as to
offer no obstruction to the working of the furnace.
By the use of this invention the seam of rivets by which the furnace is secured
to the front of the boiler is completely protected from the action of the fire, and
leakage at this seam is consequently prevented.
The arch may consist of, say, three segmental tiles which may be secured to
the furnace front by through bolts the heads of which are sunk into the tiles
and protected by fire-clay.
By the use of this invention the ordinary iron baffle plates are dispensed with,
and the furnace fronts and parts of the furnace itself effectively protected, and
almost all of the heat which is now lost by radiation is saved.
Dated this 10th day of March 1897

page_text: improvements in or relating to Furnaces
We, ROBERT MCIVOR, Non-conducting Composition Manufacturer, and WILLIAM
TOUGH MCIVOR, Engineer, both of 215 Cleveland Street, Birkenhead, in the
County of Chester, 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:
-
This invention relates to the furnaces of steam generators and has for its object
the protection of the furnace fronts, and the prevention of radiation of heat
therefrom.
As at present constructed, the furnace fronts and the baffle plates which are
fitted thereto are subjected to very intense heat and the wear and therefore the
cost of renewals is very great, and there is also considerable loss of heat by
radiation therefrom.
We have illustrated our invention in the accompanying drawings in which
Fig. I is an elevation with the front plate removed, Fig. II a section on the
line A. A. of Fig. I., and Fig. III a plan view with the furnace in section.
According to our invention we overcome the above mentioned objections by
providing, between the turnare front 1 and the fire, an arch composed of seg-
mental fire-clay tiles 2 which rest at each side of the deadplate 3; the front side
of the arch so formed abuts against the front plate, and its upper curved side
fits the under side of the crown of the furnace 4. The front corner formed by
these two sides is cut away so that only an annular portion 5 of the front side
abuts against the front plate and only a portion 6 of the width of the upper
curved side fits against the furnace, the tiles being made concave between these
abutting surfaces: this concave surface forms with the meeting portions of the
furnace front 1 and the furnace an annular air space 7. Suitable passages 8
formed in the sides of the tiles lead from this air space to the furnace; this air
space may be used with advantage as an inlet for the forced draught when the
latter is used.
The size of the arch thus formed is such as to leave a clear way into the furnace
corresponding to the door area, and the corners are well rounded off as shown
so as to offer no obstruction to the working of the furnace.
By the use of this invention the seam of rivets by which the furnace is secured
to the front of the boiler is completely protected from the action of the fire, and
leakage at this seam is consequently prevented.
The arch may consist, as shown, of three segmental tiles which may be secured
to the furnace front by through bolts the heads of which are sunk into the tiles
and protected by fire-clay, the holes 9 for these bolts are shown, and suitable
bosses 10 to form facings are also provided.
By the use of this invention the ordinary iron baffle plates are dispensed with,
and the furnace fronts and parts of the furnace itself effectively protected, and
almost all of the heat which is now lost by radiation is saved.
Having now particularly described the nature of our said invention, and in
what manner the same is to be performed, de declare that what we claim is:-
1. The hereindescribed improvement in furnaces which consists in forming
an arch composed of tiles of refractory material secured to the front plate; the
said arch having two of its surfaces shaped to abut against the front plate and
the crown of the furnace respectively, and being adapted to protect them from the
fire and to prevent radiation; substantially as described and illustrated.
E

page_text: 2. In furnaces the use of an arch of tiles as herein described whereby an
annular air space such as 7 is formed, said space having passages leading from
the air space into the furnace and being adapted to protect the seam by which
the furnace is attached to the front of the boiler, and to form an inlet for the
forced draught when the latter is employed; substantially as described and
illustrated.
3. The improvement in furnaces; substantially as described and illustrated.
December 1897.
SLOAN & LLOYD BARNES,
Castle Chambers, 26, Castle Street, Liverpool,
Agents for the Applicants.