Improvements in Apparatus for Warming Currents of Cold Air.
Year: 1889

page_text: Date of Application, 29th Apr., 1889
Complete Specification Left, 29th Jan., 1890-Accepted, 1st Mar., 1890
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Warming Currents of Cold Air.
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 that class of hot air warming apparatus
in which the volume of air to be warmed is conducted over and along the exterior
of the heating surfaces, and is more particularly, but not exclusively, applicable to
hot air stoves intended to be fixed underground.
In carrying my invention into effect, I provide a furnace of suitable power,
preferably rectangular in plan. The flue socket is formed at one end and an shaped
pipe or section of the same area as the furnace is adapted to connect with the furnace
in the following manner. The short limb of the section is luted in the flue socket
of the furnace and a suitable rest, is provided to take the weight of the long limb.
Its opposite end is provided with suitable soot-door. The top of the said long
limb is provided with a socket adapted to receive the short limb of a second
section. This second section has its soot-door at the short limb end, and the socket
and the rest at the opposite end, and so on for as many sections as may be
required to transmit the heat generated in the furnace to the currents of air flowing
over and past their surfaces.
The apparatus constructed as above described is enclosed within a suitable casing,
into which the air to be warmed is aduiitted through conduits provided with proper
regulating valves; and from which it is led away as required.
Air conduits of any suitable cross section may be led up through the sections, to
which the cold air is fed through suitable flues; and these conduits may be used in
combination with or distinct from the external air-currents above described, as may
be desired.
An apparatus as above described will have its sections horizontal and forming a
continuous gridiron flue, but I wish it to be understood that I may use sections of
any suitable section and arrange them vertically if required. If preferred or
desirable, the relative positions of the hot gases and the air currents may be reversed,
the latter being sent through pipes or sections and the former over or along them,
the sections and intervening spaces being modified in cross section accordingly.
Suitable filtering devices, baffles, amalgamating chambers and moistening devices
may be used when required to effect the delivery of pure warm air currents at an
equable temperature, and in a proper hygrometric condition.
For exclusively above-ground apparatus I use, by preference, metal cases and
these may be of any suitable pattern, but are, by preference, fluted vertically.
Dated this 29th day of April 1889.
PHILLIPS & LEIGH,
Agents for the Applicant.

page_text: 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 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 that class of hot air warming apparatus
in which the volume of air to be warmed is conducted over and along the exterior
of the heating surfaces; and is more particularly, but not exclusively, applicable to
hot air stoves intended to be fixed underground.
In order that my invention, and the best means of carrying the same into practical
effect, may be thoroughly understood, 1 will now proceed to 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. I is a sectional side elevation taken on the line A-B of Fig. 4.
Fig. 2 is a sectional front elevation taken on the line C-D of Fig. 4.
Fig. 3 is a front elevation taken on the line E-F of Fig. 1.
Fig. 4 is a sectional plan taken on the line G-H of Fig. 2.
Fig. 5 is a vertical section of a modified form of the apparatus.
I is the underground apparatus chamber; and J, the stoke-hole separated from the
former by a wall and roof K.
L is the furnace; and M, the ash-pit, access to which is provided through doors
and throats l, m, in the wall K.
N is the pipe-socket upon the top of the furnace O, O, O are sections of pipe
L-shaped in side elevation. In cross section they are oval, and as wide as the furnace
itself. The bottom L-section is no longer, it will be observed, than the furnace,
while the other sections are as long as the chamber. Each section has a nozzle n
and a socket n', at opposite ends and on opposite sides. The nozzle of the first
section is luted into the socket N on the furnace-top, and its socket n' receives in
like manner the nozzle of the second section. oo are supports to carry the weight
of the sections.
The outer ends of the sections i.e., those adjacent to the wall K terminate in soot
doors and throats p through which they can be swept.
The top L-section delivers into the smoke flue P.
Qis the cold air inlet, while the warmed air flows away along the outlet, R, through
a grating, r.
Referring to Fig. 5, I do not confine myself to making the sections and furnace
of different lengths, as they may be of the same length.
The, warming power of an apparatus is adjusted by the length and number of the
L-sections; or two apparatus may be fixed in one chamber, both delivering into the
same smoke flue.
Air conduits of any suitable cross section may be led up through the sections, to
which conduits the cold air is fed through suitable flues; and these conduits may be
used in combination with or distinct from the external air-currents above described,
as may be desired.
An apparatus as above described will have its sections horizontal and forming a
continuous gridiron-flue, but I wish it to be understood that I may use sections of
any suitable cross section, and arrange them vertically, if required. If preferred or
desirable, the relative positions of the hot currents from the furnace, and the air
currents may be reversed, the latter being sent through pipes or sections, and the
former over or along them, the sections and intervening spaces being modified in
cross section accordingly.

page_text: Suitable filtering devices, baffles, amalgamating chambers and moistening devices
may be used when required to offect the delivery of pure warm air currents at an
equable temperature, and in a proper hygrometric condition.
For exclusively above-ground apparatus I use, by preference, metal cases and these
may be of any suitable pattern; but are, by preference, fluted vertically.
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 :-
1. The gridiron combination of L-sections as set forth.
2. The combination of L-sections furnace hot currents air currents in the process
of being warmed and pipes conducting subsidiary air currents to be warmed, said
pipes passing up between two gridirons of L-sections as set forth.
Dated this 29th day of January 1890.
PHILLIPS & LEIGH,
22, Southampton Buildings, Chancery Lane, W.C., Agents for the Applicant.