A New or Improved Boiler for Heating Greenhouses, Vineries, and the like.
Year: 1893

page_text: Date of Application, 29th May, 1893
Complete Specification Left, 5th Feb., 1894--Accepted, 7th Apr., 1894
PROVISIONAL SPECIFICATION.
A New or Improved Boiler for Heating Greenhouses, Vineries, and
the like.
1, JOHN POAT of Richmond Villa, St. Sampsons, Guernsey, Gentleman, do
hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in boilers for heating greenhouses,
vineries and the like and has for its object to provide a boiler or hot water apparatus
so constructed that it will heat and circulate the water, for artificial heating
purposes in greenhouses vineries or similar buildings much more quickly than the
ordinary tubular boiler thus, not only effecting a great saving of time but also
considerably reducing the consumption of fuel.
In carrying my invention into practice, I provide two water way ends of
rectangular or other convenient shape of cast-iron or other suitable material and
tubes connecting them together, the number and size of the latter varying
according to the size of the boiler and the heating power required. The water
way ends are made with sockets or flanges both inside and out in order to secure
the tubes, which may be screwed on or fixed with the usual caulk joint or rubber
ring.
The tubes which are the main feature of this invention are so arranged that the
water may have a free circulation in and around them in connection with the water
way ends above referred to.
These tubes consist of an inner and an outer pipe and extend along the entire
length of the boiler.
Through the inner tube pass the heated air and gases after leaving the furnace,
travelling from one end of the boiler to the other, until they reach the stack
where they escape in the ordinary manner.
In the space between the inner and the outer tube the water which has become
heated by reason of the heated air and gases passing through the inner tube, is
caused to circulate throughout the boiler and into and through the circulating
system of pipes.
As my improvements are capable of some modifications without departing from
the principle thereof I do not restrict myself to materials, dimensions, or to the
precise form or placement of the parts thereof.
Dated this 29th day of May 1803
F. G. CASSELL,
Of Cassell & Co.,
22, Glasshouse Street, Regent Street, London,
Agent for the Applicant.
COMPLETE SPECIFICATION.
A New or Improved Boiler for Heating Greenhouses, Vineries, and
the like.
I, JOHN POAT of Richmond Villa St. Sampsons Guernsey, Gentleman, 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 boilers, for heating greenhouses

page_text: vineries and the like, and has for its object to provide a boiler or hot water
apparatus so constructed that it will heat and circulate the water for artificial
heating purposes in greenhouses, vineries or similar buildings much more quickly
than the ordinary tubular boiler or other hot water generator, thus not only
effecting a great saving of time but also considerably reducing the consumption
of fuel.
In carrying my invention into practice I provide two waterway ends of
rectangular or other convenient shape of cast iron or other suitable material and
tubes connecting them together the number and sizes of the tubes varying
according to the size of the boiler and the heating power required. The water-way
ends are made with sockets or flanges both inside and out in order to secure the
tubes, which may be screwed on, or fixed with the usual caulk joint or rubber ring.
The tubes which are the main feature of this invention are so arranged that the
water may have a free circulation in and around them in connection with the water-
way ends above referred to.
These tubes consist of an inner and an outer pipe and extend along the entire
length of the boiler. Through the inner tubes pass the heated air and gases after
leaving the furnace travelling from one end of the boiler to the other, until they
1 each the stack, where they escape in the ordinary manner. In the space between
the inner and the outer tube the water which has become heated by reason of the
heated air and gases passing through the inner tube is caused to circulate
throughout the boiler and into and through the circulating system of pipes.
By making use of the heated air and gases in this way a much more speedy
circulation and a higher temperature of water generally is obtained with a very
small consumption of fuel.
The waterway ends are joined together at the bottom by tubular firebars through
which the water is free to circulate and I further introduce a front casting which
forms the flue between the furnace and the tubes and protects the front waterway
casting from atmospheric changes. To this front casting is attached a mouthpiece
leading to the furnace and to it is hung the furnace door and the several soot
doors, these latter are provided so that the inner tubes can be cleaned when
necessary.
In order that my invention may be more fully understood I will now proceed to
describe same with reference to the accompanying drawings in which like letters of
reference indicate corresponding parts.
Fig. 1 is a longitudinal section of my improved boiler,
Fig. 2 is a halt section on line of Fig. 1,
Fig. 3 is a half section on line y y of Fig. 1,
Fig. 4 is a front view of my improved boiler and
Fig. 5 is a detail of one of the outer tubes at an enlarged scale while
Fig. 6 is a similar view of one of the tubular firebars,
Fig. 7 is an end view of the tubes.
P
My improved boiler consists of the two waterway ends a and b which are
connected together by the tubular pipes c furnished at each end with flanges f
which enter the sockets or recesses in the ends a and b, a packing ring p being
inserted between flange and socket at each end for the purpose of ensuring a tight
joint. Through the centre of the tubes e pass the tubes d which are flanged at one
end, the said flanges being of the shape clearly shown in Fig. 3 to prevent the
tubes from turning, and which enter correspondingly shaped recesses in the end a,
a packing ring being used to ensure a tight joint, the other ends of the said
tubes d pass through the perforations e in the recesses 2 formed in the end b and
are there secured with a nut n and washer w upon a packing ring p³. The lower
part of the boiler is furnished with tubular firebars 6' which enter the recesses³
in the ends a b and are provided with packing rings p³, the said firebars are
furnished on either side with a strengthening rib y and the lower tubes care
likewise furnished with a strengthening rib yalong the side which is in contact
with the fire.

page_text: A tie rod passing through the lugs k cast on the underside of the ends a and b
and secured by nuts n' is employed for additionally securing the ends a and b. I
further provide a casting placed in front of the end a which forms the mouth-
piece m between the furnace and the tubes and which serves to protect the front
waterway end a from any atmospheric changes. The said casting is provided
with a furnace door hinged at one side and secured at the other by an ordinary
latch t, and further with soot doors o so that the inner tubes & may be conveniently
cleaned when necessary.
My improved boiler operates in the following manner :—
The boiler having been bricked in, in the ordinary manner, that is to say level
with the front casting and surrounding the whole of the tubes and both waterway
ends, provided with an ash pit at the bottom and with a flue formed at the back of
the waterway end b into which open the ends 9 of the inner pipes d. The fuel is
passed through the furnace door on to the tubular firebars where it is ignited
in the ordinary manner. The hot air and gases ascend round and about the outer
tubes c and as there is no other opening for their escape are compelled to pass
through the inner tubes d, entering the said tubes at the end 9' and escaping into
the chimney stack at g. The water which circulates in and around the waterway
ends a and b and through the outer tubes c is thereby quickly heated when it passes
through a suitable outlet into the circulating system of pipes employed for heating
the building, greenhouse or the like, and is again returned to the boiler in due
course to be again heated as hereinbefore described.
A screw plugs is inserted in the lower part of the frout waterway end a which
can be removed when necessary in order to empty the boiler.
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 new or improved boiler for heating purposes, arranged, constructed, and
operating substantially as herein described and shown and for the purpose set
forth.
F. G. CASSELL,
Of Cassell & Co.,
22, Glasshouse Street, Regent Street, London, W.,
Agent for the Applicant.