Improvements in Underground Air-warming Apparatus.
Year: 1889

page_text: Date of Application, 21st May, 1889
Complete Specification Left, 19th Feb., 1890-Accepted, 29th Mar., 1890
PROVISIONAL SPECIFICATION.
Improvements in Underground Air-warming Apparatus.
I, JOHN GRUNDY, of No. 30, Duncan Terrace, City Road, London, and Tyldesley,
near Manchester, in the County of Lancashire, Heating Apparatus Manufacturer, do
hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in underground apparatus for warming
currents of cold air and supplying them to the interior of a building or other enclosed
space which it is desired to warm.
In carrying my invention into effect, 1 construct a chamber beneath the floor level
of a suitable size to receive the stove, and provide suitable cold air conduits adapted
to convey and deliver cold air from the external atmosphere, and also from the interior
to be warmed, into the stove chamber.
The stove chamber is sufficiently large to expose the first few lengths of the smoke
flue, and so adapt them for practical use as heating agents.
The stove chamber and the conduits leading from the interior thereinto are covered
with grating laid preferably flush with the floor.
It has hitherto been the practice to make the one underground chamber do duty for
both stove-chamber and stoke-hole, and the consequence of so crude an arrangement
has been that, there being no separation between the warmed air-currents and the dust
of the stoke-hole, the said air-currents have carried with them a portion of the dust
and any smoke or back draft from the stove.
Now according to my present invention, the stoke hole is separated from the stove
chamber by a wall through which the stove front projects. Access to the stoke hole is
provided, and preferably through the floor of the interior to be warmed, through trap
doors. Cold air for combustion is supplied into the stoke hole from the outside atmo-
sphere through a suitable conduit.
Dated this 21st day of May 1889.
PHILLIPS & LEIGH,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Underground Air-warming Apparatus.
I, JOHN GRUNDY of 30, Duncan Terrace, City Road, London, and Tyldesley, near
Manchester, in the County of Lancashire, Heating Apparatus Manufacturer, 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 underground apparatus for warming
currents of cold air, and supplying them to the interior of a building or other enclosed
space which it is desired to warın.
In carrying my invention into effect I construct a chamber beneath the floor level
of a suitable size to receive the stove, and provide suitable cold air conduits adapted to
convey and deliver cold air from the external atmosphere and also from the interior
to be warmed into the stove chamber.
The stove chamber is sufficiently large to expose the first few lengths of the smoke
flue and so adapt them for practical use as heating agents.
The stove chamber and the conduits leading from the interior thereinto are covered
with grating laid preferably flush with the floor.
It has hitherto been the practice to make the one underground chamber do duty for
both stove-chamber and stoke-hole and the consequence of so crude an arrangement

page_text: has been that there being no separation between the warmed air currents and the dust
of the stoke-hole the said air currents have carried with them a portion of the dust and
any smoke or back draft from the stove..
Now according to my present invention the stoke-hole is separated from the stove
chamber by a wall through which the stove front projects. Access to the stoke-hole
is provided and preferably through the floor of the interior to be warmed through
trap doors. Cold air for combustion is supplied into the stoke hole from the outside
atmosphere through a suitable conduit.
In order that my invention and the means by which it is to be carried into practical
effect may be thoroughly understood I will describe them in detail referring in so
doing to the accompanying drawing which is to be taken as part of this specification
and read therewith.
Fig. 1 is a longitudinal sectional elevation taken on the line A-B of Fig. 2.
Fig. 2 is a horizontal section taken on the line C-D of Fig. 1.
Fig. 3 is a transverse section taken on the line E F of Fig. 2.
G is the underground stove chamber, H the stove, and / h lengths of the smoke
flue.
I is a grating in the floor over the chamber.
JJ are cold air supplies from the outer atmosphere delivering into the stove chamber
on either side of the stove.
KK are vertical air shafts from the inside of the building delivering currents
of air therefrom at about the floor level of the stove chamber. These shafts are covered
with gratings k k.
L is a baffle over the stove and is provided for the purpose of preventing the heated
air currents from escaping too quickly from the stove chamber.
M is the stokehole. It is separated from the stove chamber by a dividing wall m
through which the furnace and ashpit doors project.
N is a cold air supply from the outside air delivering into the stoke hole. -
O is a grated or solid trap door giving access to the stoke hole M.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is :
The combination of underground stove, stove chamber, exposed lengths of smoke
flue, air conduits adapted to supply cold air from both the outside atmosphere and the
interior of the building to the said chamber, and stokehole separated by a dividing
wall from the stove chamber, as set forth.
Dated this 19th day of February 1890N
PHILLIPS & LEIGH,
22, Southampton Buildings, Chancery Lane, W.C.,
Agents for the Applicant.