Improvements in Apparatus for Heating Air.
Year: 1893

page_text: Date of Application, 7th Nov., 1893
Complete Specification Left, 4th Aug., 1894-Accepted, 15th Sept., 1894
PROVISIONAL SPECIFICATION.
Improvements in Apparatus for Heating Air.
1, WILLIAM TATTERSALL, of 90, Arden Terrace, Accrington, in the County
of Lancaster, Engineer, do hereby declare the nature of this invention to be as
follows:-
This invention relates to improvements in that type of air heating apparatus in
which the heat is carried by conduction through the metallic walls or sides and
roof of the furnace or fire box and the object of my invention is to enable the
said walls to more readily absorb or take up the heat created by the combustion
taking place within and to more readily give off such heat to the air surrounding
the furnace.
For this purpose I form a series of ribs, gills or projections upon the interior of
the furnace and by thus increasing the surface of the walls of the furnace as well
as bringing them nearer to or more intimately in contact with the burning fuel I
enable said walls to more readily and perfectly absorb the heat of the furnace and
conduct it to the exterior.
The said ribs may be arranged in a vertical, horizontal or inclined direction.
To enable the walls of the furnace to more readily conduct the heat to and part
with it to the air I may form a series of gills, ribs or projections outside the walls
of the furnace or upon that portion of the outside of the said walls forming the air
heating passage or passages.
Dated this 6th day of November 1893.
DRACUP & NUWELL,
Bradford, Agents.
COMPLETE SPECIFICATION.
Improvements in Apparatus for Heating Air.
I, WILLIAM TATTERSALL, of 27, Victoria Square, Leeds, in the County of
York, Engineer, late of 90, Arden Terrace, Accrington, in the County of
Lancaster, 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 improvements in that type of air heating apparatus in
which the heat is carried by conduction through the metallic walls or sides and
roof of the furnace or fire box, and the object of my invention is to enable the said
walls to more readily absorb or take up the heat created by the combustion taking
place within and to more readily give off such heat to the air surrounding the
furnace.
For this purpose I form a series of ribs, gills or projections upon the interior
of the furnace and by thus increasing the surface of the walls of the furnace as
well as bringing them nearer to or more intimately in contact with the burning
fuel I enable said walls to more readily and perfectly absorb the heat of the
furnace and conduct it to the exterior.
To enable the walls of the furnace to more readily conduct the heat to and
part with it to the air I form a series of gills, ribs or projections outside the
walls of the furnace or upon that portion of the outside of the said walls forming
the air heating passage or passages.

page_text: Reference is to be had to the accompanying sheet of drawings forming a part of
this Specification, in which similar letters of reference indicate corresponding
parts in each of the figures.
Figure 1, represents a front view of heating apparatus illustrating the
application of my improvements.
Figure 2, represents a side view of the same.
Figure 3, represents a vertical section of the apparatus on the broken line a, b
Figure 2.
:
Figure 4, represents a vertical section on the broken line y, Figure 1.
The furnace A may be of any suitable form and is represented in the drawings
as having fire brick sides B, B and a fire brick end C. A bridge D is shown at
the end of the fire bars E between the furnace proper and the combustion
chamber F behind. The furnace is fitted with a fire door G and an ash pit H is
arranged beneath it. The smoke flue J at the back of the furnace is connected to
a chimney in any convenient way.
A
The arched cast iron roof K of the furnace is provided with a series of internal
ribs or gills L and a number of similar ribs or gills M are formed outside.
sheet metal or other cover N is fixed around the roof K. forming an air passage
or chamber O above and this passage and is fitted with an inlet P and an outlet Q.
A fan may be fitted in either the said inlet or outlet (preferably in the inlet), or
other means may be provided to force or draw air through the passage O. It is
obvious that the ribs or gills considerably increase the heating surface and at the
same time expose a proportionately larger heated surface to the air as it is passed
through the chamber O.
Instead of the construction shown the ribs or gills may be arranged horizontally,
or be more or less inclined, or other forms of projections may be employed.
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:
Air heating apparatus consisting of a furnace having a metal roof or metal
walls provided with a series of internal and external ribs, gills or other projections,
substantially as herein shown and described and for the purpose specified.
Dated this 2nd day of August 1894.
DRACUP & NOWELL,
Bradford, Agents.