Improvements in Heating Apparatus for Greenhouses and other Buildings.
Year: 1897

page_text: PROVISIONAL SPECIFICATION,
Improvements in Heating Apparatus for Greenhouses and
other Buildings.
I, FREDERIC LE POIDEVIN, of La Porte, Castel, Guernsey, Forced Fruit Grower, do
hereby declare the nature of this invention to be as follows:-
This invention relates to hot water circulating apparatus for heating greenhouses
and other buildings and has for object to obviate the necessity at present generally
experienced of sinking the boiler or water heater below the level of the water circu-
lating pipes and thus to do away with the usual stoke-hole which, being beneath the
level of the ground, is expensive to construct and moreover frequently becomes
flooded.
The invention has further for object to prevent the accumulation of steam in the
circulating pipes and so reduce the risk of explosion to a minimum.
According to my invention (which is applicable to any existing system of hot
water circulating pipes, the immediate connections to the boiler excepted) the floor
upon which the boiler or water heater (of any known type) is placed, may be at the
same level as the floor of the greenhouse or other chamber to be warmed so that no
sunk stoke-hole is required. The flow-pipe or rising main for the hot water is of
large diameter and is led from the upper part of the boiler to about the middle of a
tank placed at any convenient level as far above the crown of the boiler as the height
of the building will admit. From the bottom of this tank a down pipe leads to the
range of hot water circulating pipes, the return flow from which is conducted into
the lower part of the boiler.
The tank just mentioned might be open, but to avoid loss of heat from the water
it is preferred that it should be closed and provided with a pipe leading from its top
and discharging into another (open) cistern placed higher than the first tank so as to
receive water forced out of the pipe by any steam pressure that may be generated,
the pipe also allowing the escape of steam and air. The upper cistern is connected
by a small pipe provided with a stop-cock with the return pipe of the circulating
system and serves to supply the circulating system and boiler with water to replace
any waste which may occur.
It will be obvious that any steam formed in the boiler will pass directly to the first
tank from which, if open, it will escape into the atmosphere or, if the first tank be
closed, the steam will pass thence to the second and higher cistern and so into the
atmosphere so that, in either case, accumulation of steam pressure in the boiler or
elsewhere will be impossible.
D
11-
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London

page_text: Improvements in Heating Apparatus for Greenhouses and
other Buildings.
FREDERIC LE POIDEVIN, La Porte Castel, Guernsey, Forced Fruit Grower, 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 hot water circulating apparatus for heating greenhouses
and other buildings and has for object to obviate the necessity at present generally
experienced of sinking the boiler or water heater below the level of the water
circulating pipes and thus to do away with the usual stoke-hole which, being beneath
the level of the ground, is expensive to construct and moreover frequently becomes
flooded.
The invention has further for object to prevent the accumulation of steam in the
circulating pipes and so reduce the risk of explosion to a minimum.
The accompanying drawing forming part of this Specification illustrates, by
a perspective view, my invention as applied to the hot water circulating apparatus
for warming a greenhouse or conservatory.
According to my invention (which is applicable to any existing system of hot water
circulating pipes the immediate connections to the boiler excepted) the floor a upon
which the boiler or water heater b (of any known type) is placed, may be at the same
level as the floor c of the greenhouse or other chamber to be warmed so that no sunk
stoke-hole is required. The flow-pipe d or rising main for the hot water is of large
diameter and is led from the upper part of the boiler b to about the middle of a
tank e placed at any convenient level as far above the crown of the boiler as the
height of the building will admit. From the bottom of this tank e a down pipe f
leads to the range of hot water circulating pipes g, g, the return flow from which is
conducted into the lower part of the boiler as at h.
The tank e just mentioned might be open, but to avoid loss of heat from the water
it is preferred that it should be closed and provided with a pipe i leading from its
top and discharging into another (open) cistern j placed higher than the first tank e
so as to receive water forced out of the pipe by any steam pressure that may be
generated, the pipe i also allowing the escape of steam and air. The upper cistern j
is connected by a small pipe k provided with a stop-cock with the return pipe h of
the circulating system and serves to supply the circulating system and boiler with
water to replace any waste which may occur.
It will be obvious that any steam formed in the boiler will pass directly to the
first tank e from which, if open, it will escape into the atmosphere or, if the first tank
be closed, the steam will pass thence to the second and higher cistern ; and so
into the atmosphere so that, in either case, accumulation of steam pressure in the
boiler or elsewhere will be impossible.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:
The herein described combination and arrangement of water heating and
circulating apparatus for warming greenhouses and other buildings substantially as
Dated this 31st day of May 1898.
A. M. & WM. CLARK
Chartered Patent Agents, 53, Chancery Lane, London.