An Improved Furnace for the Production of Hot Air.
Year: 1888

page_text: Date of Application, 12th ec. 1888
Complete Specification Left, 23rd Mar., 1889
Complete specification Accepted, 11th May, 1889
PROVISIONAL SPECIFICATION.
An Improved Furnace for the Production of Hot Air.
I, JAMES WALWORTH of Albert Works, Lister Hills, Bradford in the County of
York, Corn Milling Engineer, do hereby declare the nature of this invention to be as
follows:-
:-
This invention consists of a Furnace for producing puro,hot air for Machines.for
drying and conditioning Grain, Tea and other Material. It is so constructed, as to avoid
the obnoxious gases arising from the Coal. Coker or other Combustibles used to produce
heat; which gases taint the. Grain. etc. being dried or conditioned:
To carry out my invention, I construct a rectangular furnace of brick or metal-
by preference brick-having grate bars and fire door. or doors, at a suitable distance
from the bottom. I cover the top of this furnace, by means of a metal plate; leaving
a space at one end for the furnace chimney, from which plate I suspend a hot air
chamber or oven being lower.at one end than the other, and at a suitable distance from
the two inner sides of the furnace, so as to allow the flame or heat of the fire to travel
up the sides. From the inside of the bottom plate of the hot air chamber.or.oven I
suspend rows of metal pipes set alternatively, which pipes project downwards a suitable
distance into the furnace in the forin of a curve towards and pass through that side of
the furnace furthest from the fire door, such pipes being open at both ends and secured
to the bottom plate of the hot air chamber by means of set screws which pass through
flanges, formed on the tops of the pipes into the plate. The cold air enters at the ends
of the pipes and is heated.in its traverse towards the hot air chamber by means of the
fire heating the pipes.
The hot air is drawn into the drying machine by means of an exhaust. Fan or Blower
fixed to the top plate of the furnace and communicating with the hot air chamber.
The above heating apparatus. may be employed. for. stationary, revolving, or other
Drying Machines which are at present in use.
"Dated this Eleventh day of December 1888.

page_text: 1.
An Improved Furnace for the Production of Hot Air.
1.
1, JAMES WALWORTH of Albert Works, Lister Hills, Bradford in the County of
York, Corn Milling Engineer 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 :—
as to
This invention consists of a furnace for producing pure hot air for Machines for drying
and conditioning grain, tea, straw, hay and other similar material so constructed
avoid the obnoxious gases arising from the coal, coke or other combustibles used to pro-
duce heat; which gases taint the grain etc. being dried or conditioned.
To carry out my invention I. construct a rectangular furnace of brick or metal by
preference brick, having grate bars and fire door or doors, at a suitable distance from
the bottom, I cover the top of this furnace by means of a metal plate, leaving a space
at one end for the Furnace Chimney from which. I suspend a hot air chamber or oven
being lower at one end than the other, and at a suitable distance from the two inner sides
of the furnace so as to allow the flame or heat of the fire to travel up the sides. From
the inside of the bottom plate of the hot air chamber or oven I suspend' rows of metal
pipes set alternatively which pipes project downwards a suitable distance into the
furnace in form of a curve towards and pass through the side of the furnace furthest
from the fire door, such pipes being open at both ends and secured to the bottom plate
of the hot air chamber by means of set screws which pass through flanges formed on
the tops of the pipes into the plate. The cold air enters at the ends of the pipes and is.
heated in its traverse towards the hot air chamber by means of the fire heating the
pipes. The hot air is drawn from the hot air chamber and blown into the drying
machine by means of an exhaust fan or blower fixed to the top plate of the furnace,
and communicating with the hot air chamber. The above heating apparatus may be
employed for stationary revolving or other drying machines which are at present in:
use.
In order to enable my invention to be fully understood I will proceed to describe the
same with reference to the accompanying drawings in which Figure 1 represents a
longitudinal section of my improved furnace. Fig. 2 represents a plan of my improved
furnace having the top plate removed. Fig. 3 represents a sectional elevation through
the hot air chamber and fan of my improved furnace, and Fig.4 represents a sectional
elevation of my improved furnace showing the position of the pipes.
Similar letters refer to similar parts in each of the figures:-
The two side walls of the furnace are represented at A, and the front and back at
B and respectively, such furnace having grate bars D and fire door or doors E.
The top plate F rests upon the two side walls A leaving an open space G at the back
of the furnace for the chimney, this' plate F forms the top of the hot air chamber, or
oven to which it is secured, such air chamber being supported by means of the feet K
(formed at each end of the side frame J) resting upon and built in the front and back
walls B and C. The pipes L pass through the bottom plate M of the hot air chamber,

page_text: to which plate they are secured by means of set screws, the other ends of the pipes
passing through the back wall C. The cold air enters the pipes at N and is heated
during its traverse towards the chamber H, and whilst in the chamber by means of the
fire place on the grate bars D.
The hot air is drawn from the hot air chamber H, and through the pipes L and
blown into the drying machine, by means of the exhaust fan or blower O which com-
municates with the hot air chamber H through the openings P. 1 may dispense with
the hot air chamber Hand draw the hot air direct through a pipe or pipes, or I may
place the pipes across the furnace, and form a hot air chamber, or oven at the side.
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:
I. A furnace for the production of pure hot air constructed in the manner sub-
stantially as described and represented in the accompanying drawings.
II. In furnaces for the production of hot air the pipes L passing through the furnace
with or without the hot air chamber H, substantially as described and represented in
the accompanying drawings.
III. In furnaces for the production of hot air pipes laid across the furnace and
through the side walls communicating with a hot air chamber or oven at one side of
the furnace in the manner herein described.
Dated this 21st day of March 1889.
FRANK JAS. WALWORTH,
Town Hall Chambers, Bradford,
Agent for the Applicant.