Improvements in Steam Boiler Furnaces.
Year: 1889

page_text: Date of Application, 7th Aug., 1889
Complete Specification Left, 18th Nov., 1889-Accepted, 21st Dec., 1884
PROVISIONAL SPECIFICATION.
Improvements in Steam Boiler Furnaces.
I, JONATHAN GRESTY of 28 Deansgate Manchester in the County of Lancaster
Engineer do hereby declare the nature of this invention to be as follows
The improvements which form the subject of this invention relate to the combustion
or flame chambers of water tube steam boilers and consist in the employment of
fire bricks which are formed so as to be self fastening and self sustained when fitted
on or between or in connection with the tubes of water tube steam boilers in order
to form coverings for the under or upper sides of combustion or flame chamber
particularly in their application to the upper portion of the flame bridge at the rear
end of furnaces. This invention may also be applied to other portions of the furnace
so as to form coverings for the under parts and near front ends of tubes, or to form
flame or combustion chambers. In this invention I form right and left fire bricks
which are round on the inside to fit to the tubes and rectangular on the outside in
order to form joints with each other. The internal diameter of the inner rounded
portion is made to correspond with the external diameter of water tubes forming
boiler I construct the upper external portion of fire brick of a shape corresponding to
the inside of said brick: the lower external portion of fire brick I form of a rectangular
shape. Two of the herein above described right and left fire bricks when placed
together would form bricks having a rectangular base and sides, and semicircular
top with hole through the centre longitudinally, said hole being of a diameter
corresponding to external diameter of any one tube forming boiler. In order to
attach these bricks in the furnace I pass the round portion of fire brick through one
of the openings between tubes and place another fire brick in a reverse position by
which means they are effectually locked in position.
I repeat the same operation in successive openings between tubes and by these
means I form the front upper portion of flame bridge and coverings for other
portions of combustion or flame chamber.
Dated this 6th day of August 1889.
JONATHAN GRESTY,
Applicant.
COMPLETE SPECIFICATION.
Improvements in Steam Boiler Furnaces.
I JONATHAN GRESTY of 28 Deansgate, Manchester in the County of Lancaster
Engineer 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 :-
The improvements which form the subject of this invention relate to the combustion
or flame chambers of water tube steam boilers, and consist in the employment of fire
bricks which are formed so as to be self fastened and self sustained when fitted on
or between, or in connection with the tubes of water tube steam boilers, in order to
form coverings for the under or upper sides of combustion or flame chamber,
particularly in their application to the upper portion of the flame bridge at the rear
end of the furnace. This invention may also be applied to other portions of the
furnace so as to form coverings for the under parts and near front ends of tubes,
or to form flame or combustion chambers. In order more clearly to describe this
my invention, I have annexed hereunto a sheet of drawings in the several views
theroin shown similar letters refer to similar parts. In this invention I form right
and left shaped fire bricks a and b which are on the inner side c round to fit to the

page_text: tubes d, and rectangular on the outside.at e in order to form joints with each other.
On the accompanying drawings Fig. 2 is end view of a right and Fig. 1 end view
of a left shaped fire brick. Fig. 3 is inner side view of the same with either a
parallel or a taper base. Fig. 4 shows method of placing fire bricks in position, and
Fig. 5 shows a range of tubes with firebricks adjusted in position. In these views
the internal diameter of the inner rounded portion c of the firebricks a and is made
so as to correspond with the external diameter of water tubes d which form the boiler.
I construct the upper external portion f of fire brick of a shape corresponding to the
inner side c of said fire brick: the lower external portion I form of a rectangular shape.
Two of the herein above described right and left fire bricks a and b when placed
together form bricks having a rectangular base and sides e and semicircular top f
with hole passing longitudinally through the centre, said hole being of a diameter
corresponding to external diameter of any one of tubes d which form boiler. In
order to attach these bricks in furnace I pass the round portion fc of firebrick b or a
through one of the openings g, entering first above or below fixed position and when
in line of position sliding it down to its required place between tubes d, and place
another firebrick or a in a reverse position as shown in Fig. 4 by which means
said fire bricks are effectually secured in position. I repeat the same operation in
successive openings between the tubes d and by these means I form the front
upper portion of flame bridge and coverings for other portions of combustion or flame
chambers.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim, is.
In a water tube steam boiler the use of firebricks which are formed so as to be
self fastened and self sustained when fitted on or between or in connection with the
tubes of water tube steam boilers in order to form the front upper portions of flame
bridge and coverings for any other portions of combustion or flame chambers in said
water tube steam boilers in the manner substantially as herein before described and
illustrated.
Dated this 16th day of November 1889.
THOS. PRESCOTT,
Agent for Applicant.