Improvements in Apparatus for Heating Air.
Year: 1892

page_text: Date of Application, 1st Sept., 1892-Accepted, 22nd Oct., 1892
COMPLETE SPECIFICATION.
Improvements in Apparatus for Heating Air.
I FREDERICK WILLIAM GOLBY of 36 Chancery Lane, in the County of
Middlesex, Patent Agent, do hereby declare the nature of this invention as com-
municated to me by Benjamin Jardin of 16 Rue de l'Arriveé, Paris, France,
Gentleman, 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 apparatus for heating air so constructed as to provide
a large heating surface over which the air has to travel before it leaves the
apparatus.
In the accompanying drawings
Figure 1 is a vertical section of apparatus for heating air, constructed in accord-
ance with this invention,
Figure 2 is a similar view shewing a modification of the invention; and
Figure 3 is a horizontal section.
The same letters of reference are used to indicate the same or corresponding
parts in the three views.
The fire box O is composed of a cylinder c at the lower part of which is the
grate with the ashpit a beneath. is a valve to regulate the admission of air
for combustion, and g is a door through which the ashpit can be inspected. d is
the uptake or chimney through which the smoke and other gaseous products of
combustion escape. Outside the cylinder c is another and concentric cylinder e,
and in the annular space between the two cylinders a number of tubes J of small
section are placed vertically and secured top and bottom to tube plates in the
ordinary manner. These tubes J may be circular in cross section as shewn at J
in Figures 1 and 3, or they may be rectangular as shewn at J¹ in Figures 2 and 3,
or of other shape. The tubes open into chambers and i at top and bottom.
The air to be heated is admitted at the bottom through the valve and after
traversing through the chamber i and through the tubes J or J¹ passes into the
chamber and from thence by the outlet I to any desired locality or place.
In Figure 2 the valve h is somewhat lower down than in Figure 1, and all the
chambers through which the air circulates are rounded so as to offer less resistance
to its passage.
The fire box O as well as the outer casing e may be other than circular in cross
section, although for the sake of brevity they have been described as cylindrical in
shape. Also it is obvious that the firebox and the surrounding tubes J or J¹ may be
arranged horizontally instead of vertically as shewn. No means for firing or stoking
the furnace are shewn or described, as this may be effected in any well known and
suitable manner.
Having now particularly described and ascertained the nature of this said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
Apparatus for heating air, consisting of a fire box surrounded by an outer con-
centric casing; between which and the fire box are arranged a number of tubes of
small section fitting into tube plates, and communicating with chambers at top and
bottom or at each end of the furnace, with inlet and outlet passages for the air, all

page_text: arranged and combined so as to operate substantially in the manner described and
shewn.
Dato this 1st day of Santombar 1000
F. W. GOLBY,
36, Chancery Lane, London, W.C.