Year: 1895

page_text: пирrоvещение
JOHN SCHOFIELD 39 Oxford Street Werneth Oldham Foreman Boilermaker
do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in steam boilers by providing them
with additional heating surface for generating steam expeditiously and more
economically.
This I accomplish by constructing the furnace flue or flues with a series of
combustion chambers and by fitting metal tubes at various parts of the boiler
more particularly round the furnace flue or flues in those plates not occupied by
the combustion chambers and the lower portion of the shell in short wherever the
smoke or products of combustion passes about the boiler in its passage to the
chimney shaft.
I form the combustion chambers by plates slightly bent at the end exposed to
the heat and smoke and having two semi-circular sides or sides formed of portions
of a circle which carry a number of short tubes taking their centres from any
point in the combustion chamber sides placed preferably parallel to the direction
of the hot gases resulting from combustion.
One combustion chamber is fixed in each flue plate excepting those plates
constituting the firebox or furnace proper.
These chambers are arranged so that each alternate one is in line or all may
be in line. They may also occupy any portion of the flue or flues viz.:-upper
or lower half, right or left side or intermediate positions.
The individual tubes can be fixed parallel diagonally or at right angles to the
boiler flue or flues and between the joints of the plates or in such a manner that
the joints may be crossed, one end of the tube finishing in one plate and the other
end in the adjacent plate. The tubes can also be made of any diameter up to
4 inches inside and of any shape say with square elbows and straight or slightly
cambered between the elbows or the whole tube may form a semi-circle or almost
a complete circle. They may also be parallel or inclined to the furnace flue or
shell plates. The tubes can be so fixed that the ends in each plate may or may
not be in line with each other.
In order to strengthen the plates of the shell in which the tubes are fixed
I provide them with one or more transverse stiffening rings forming half circle,
whole circle or parts of a circle.
I may also use the tubes without the said stiffening rings in the plates.
I may also use the combustion chambers without the individual tubes or I may
use the tubes without the combustion chambers.
Dated this kirst day of June 1895

page_text: Improvements in Steam Bollers.
JOHN SCHOFIELD 39 Oxford Street Werneth Oldham Foreman Boilermaker
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 relates to improvements in steam boilers by providing them
with additional heating surface and increased evaporative power for generating
steam expeditiously and more economically.
This accomplish by constructing the furnace flue or flues with a series of
combustion chambers and by fitting metal tubes at various parts of the boiler,
namely in the lower portion of the shell where the smoke or products of
combustion pass underneath the boiler in its passage to the chimney shaft.
I form the combustion chambers by plates slightly bent or straight at the end
projecting into the furnace flue and exposed to the heat and smoke and having
two semicircular sides or sides formed of portions of a circle which carry a
number of short tubes of a variable quantity if deemed necessary but preferably
the number shown; each tube placed parallel to the direction of the hot gases
resulting from combustion.
One combustion chamber is fixed in each flue plate excepting those plates
constituting the fire-box or furnace proper.
These chambers are arranged so that each alternate one is in line only or all
may be in line. They may also occupy any portion of the flue or flues viz. :-upper
or lower half, right or left side or intermediate positions.
Each or all the combustion chambers may be welded or rivetted into the flue or
flues as is deemed expedient and in such a manner that they will be directly in
the centre or otherwise of each furnace flue-ring. The tubes may also vary
length and diameter.
in
Fig. 1 is a cross section and Fig. 2 a sectional plan showing the combustion
chambers fixed in position. A. A. are the plates carrying the tubes and B. B. are
the tubes themselves.
The individual tubes can be fixed parallel, diagonally, or at right angles to the
boiler flue or flues and between the joints of the plates or in such a manner that
the joints may be crossed, one end of the tube finishing in one plate and the other
end in the adjacent plate. The tubes can also be made of any diameter up to
4 inches inside and of any shape, say with square elbows and straight or slightly
cambered between the elbows or the whole tube inay form a semi-circle. They
may also be parallel or inclined to the furnace flue or shell plates. The tubes
can be so fixed that the ends in each plate may or may not be in line with each
other.
C. C. are the tubes.
I may use the combustion chambers without the individual tubes or the latter
without the former.
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 :-
The construction of steam boilers with the flue or flues fitted with combustion
chambers and the shell provided with single tubes for increasing their evaporative
power substantially as shown and described.
Dated this 2nd day of March 1896.
JOHN SCHOFIELD.