Improvements in Boilers for Use in Heating Greenhouses and for other Purposes.
Year: 1887

page_text: Date of Application, 19th Sept., 1887
Complete Specification Left, 18th June, 1888
Complete Specification Accepted, 31st Aug., 1888
Improvements in Boilers for Use in Heating Greenhouses and for
other Purposes.
I, GEORGE FREDERICK REDFERN, of the firm of G. F. Redfern & Co., the General
Patent Office, No. 4, South Street, Finsbury, in the County of Middlesex, Patent
Agents, do hereby declare the nature of this invention (a communication from
abroad by Victor Brasseur, of Marche, in the Kingdom of Belgium, Gentleman,) to
be as follows :--
This invention relates to boilers for heating green-houses and for other purposes.
The improved boiler is preferably constructed of sheet metal and is provided with
copper tubes the number of which will vary according to the size of the apparatus.
These tubes pass from the furnace to a smoke box having a movable cover and by
reason of the large heating surface thus exposed water is heated very rapidly and at
a low cost. The boiler is provided with a fuel holder whereby by using coke or small
coal the furnace will be kept supplied with fuel during a considerable time without
attention. The apparatus can be easily cleaned, for this purpose it being only
necessary to remove the cover of the smoke box.
The apparatus is provided with a double jacket in which is placed a suitable non-
conducting material for preventing the radiation of heat, by which means water can
be kept in a heated state for some time after the fire is extinguished.
The apparatus is also provided with tubes to allow of the circulation of water, and
also with a draw-off cock, fire door, &c.
In order to allow of the draught being regulated a tube is provided closed at the
top the lower part of the tube is perforated and is placed within a tube similarly
perforated forming the continuation of the fuel receiver. By rotating the top tube
the holes or perforations of the two tubes can be brought opposite to each other or
the reverse and the draught can be regulated accordingly.

page_text: COMPLETE SPECIFICATION.
Improvements in Boilers for Use in Heating Greenhouses and for
other Purposes.
I, GEORGE FREDERICK REDFERN, of the firm of G. F. Redfern & Co., the General
Patent Office, No. 4, South Street, Finsbury, in the County of Middlesex, Patent
Agents, do hereby declare the nature of this invention (a communication from
abroad by Victor Brasseur, of Marche, in the Kingdom of Belgium, Gentleman),
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 boilers for heating green-houses and for other purposes:
and is illustrated in the accompanying drawing in which
Figure 1 is an elevation, and
Figure 2 is a vertical section of the improved boiler.
Figure 3 is an elevation of the outer or revolving portion of the draught regulator
or valve hereinafter described.
Figure 4 is an elevation of the inner or fixed portion of the said draught
regulator.
Figure 5 is a horizontal section of Figure 4.
Figure 6 is a plan view of Figure 2 with the cover of the smoke box G removed.
Figures 3, 4 and 5 are drawn to a larger scale than Figures 1 and 2.
The improved boiler is portable, is preferably constructed of sheet metal and is
provided with copper flue tubes B the number of which will vary according to the
size of the apparatus. These tubes pass from the furnace to a smoke box G having a
moveable cover and by reason of the large heating surface thus exposed to the direct
action of the fire, water is heated very rapidly and at a low cost. The boiler is
provided with a conical fuel holder F whereby, by using coke or small coal, the
furnace C will be kept supplied with fuel during a considerable time without attention.
The apparatus can be easily and quickly cleaned it being only necessary, for this
purpose, to remove the cover of the smoke box G. The apparatus is very strong,
can be placed in very small spaces, and is adapted for use with all kinds of
chimneys.
The apparatus is provided with a double jacket E in which is placed a suitable non-
conducting material for preventing the radiation of heat, by which means water can
be kept in a heated state for some time after the fire is extinguished.
The apparatus is also provided with exit and inlet tubes J and K respectively to
allow of the circulation of water, and also with a draw-off cock 1, fire door H, rocking
grate L, and ash box D.
In order to allow of the draught being regulated and the heat of the boiler being
progressively increased, a conical tube (Figure 3) closed at the top by a cover and
capable of being rotated, is provided in the smoke box G; the lower part of the tube
is perforated and it has placed within it a fixed conical tube (Figure 4) similarly
perforated and forming a continuation of the fuel receiver F.

page_text: I would observe that, when the fixed perforated tube, Figuro 4, has been placed
over the conical fuel receiver F, the rotating tube, Figure 3, is placed over the fixed
tube without its removeable cover in order that the upper part of the boiler may bo
closed by means of the cover of the smoke box G. The cover of the rotating tube is
then placed thereon and removed whenever it is required to fill up the fuel holder F
with fuel.
The lower edge of the outer or rotating tube is provided with indents resting upon
the supporting pins of the inner or fixed tube so that the rotating tube can be slightly
turned by means of the projections a and b, to bring the holes or perforations of the
two tubes opposite to each other or the reverse, that is to say, the valve can be
closed or opened and the draught can be regulated accordingly; when the valve is
closed, the draught takes place entirely through the flue tubes B; when however
the valve is opened, a partial draught is caused through the interior of the conical fuel
holder F and the fire will eventually, if the valve be left open, gradually rise until it
reaches the top of the cone.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declaro that what 1
claim is :-
The improvements in boilers for use in heating greenhouses and for other purposes
hereinbefore described and illustrated in the accompanying drawing.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.