Improvements in Apparatus for Warming Air.
Year: 1892

page_text: Date of Application, 20th Apr., 1892-Accepted, 28th May, 1892
COMPLETE SPECIFICATION.
Improvements in Apparatus for Warming Air.
I, WILLIAM WINSHIP WARDLE, 32 Somerfield Road, Finsbury Park,
London, N., 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 :-
The object of this invention is to obtain in tubular apparatus for heating air,
1st. A more economical construction and less loss of heat by radiation or other
causes.
2nd. By the particular combination and arrangement of parts described to
obviate the destructive effects of expansion and contraction upon the metallic and
other structures employed for this purpose.
The way and manner in which these results are obtained will be understood by
reference to the annexed drawings contained in the description following.
In the drawings:-
Fig. 1 is a plan on line A. B. Fig. 2, one half the tubes being removed.
Fig. 2 is a longitudinal section on line C. D. Fig. 1.
Fig. 3 is a transverse part section on line E. F. Fig. 1.
Fig. 4 is enlarged sectional detail of the flue column and trough on line G. H.
Fig. 1, shewing method of supporting heater.
Fig. 5 is enlarged section on line J. K. Fig. 1, shewing tube plate, trough, and
sand packing.
Fig. 6 enlarged section on line M. N. Fig. 1, but shewing sheet iron casing.
In the drawings: 1, are the walls of furnace chamber formed of brick, stone
or any other suitable material, 2, is the fire door and 3, the damper, both of
which may conveniently be mounted in one metallic frame, as shewn. Mount.ed
upon a pier 4, and the fire bars 5, supported thereby, is a basket 6, which contains
the fuel. The open construction and the position of the basket permit free
circulation of air beneath and through the fire. At a suitable height above the
fire on the walls of the chamber is a metal trough 7, see Figs. 4, 5 and 6. The
tubular heater consists of two metallic tube plates 8, 8, into which the iron or
other tubes 9, are securely fixed by expanding their ends in the usual or any
equivalent suitable manner. Fastened to each tube plate 8, 8, and to the side
casing by flanges 17, and angle iron 18, or their equivalent are 4 flue columns 11,
with openings therein 15, 15. The plates forming the side and top of casing being
loose riveted, or otherwise so fastened to each other and to each end of the tube
plates, as to admit of free expansion. Each column 11, is fitted with a hemispherical
dead end 12, which sits upon an iron ball 13, resting within the cup 14, formed in
the inetal of the trough 7, at each corner, see Fig. 4, the columns thus supported
taking the weight of the heater. For convenience of manufacture the troughs and
corner pieces may be in separate parts. In each flue column 11, at any required
position passages 15, are formed opening into the flue contained therein, and when
required suitable dampers 3' are provided for the upper openings 15, which control
the escape of the heated waste products and assist in regulating the temperature
imparted to the air passing through the tubes.
The tubular heater is covered in with a loose or riveted sheet iron cover 10*, and
the 4 flue columns 11, are connected to the chimney 16, by flue pipes 11". In
order to seal the lower ends of the tube plates 8, 8, the side casings 10, and the
flue columns 11, supported as described, sand, or other loose uncombustible materials,
is filled into the troughs 7, as see Figs. 2, 3, 4, 5, 6.
The operation of my invention is as follows:-
Fuel being placed in the basket 6, and ignited, the heated products will pass

page_text: outside of, and between the tubes 9, and escape by the passages 15, or 15, according
to the position of the damper in the flue, to the flue columns 11, and thence to the
an illustration, say, at A or B, is
chimney. In any suitable position, but as
placed a fan which propels or draw the cold air to be heated through the interior
of the tubes 9. It is obvious that by controlling the fire as above described, and
by the cold air inlet doors 3° almost any degree of heat may be imparted to the
air pulled or forced through the tubes as described, and since the heater is entirely
supported by the balls 13, upon which the flue columns 11, rest, and these
permit, of movement in any direction, none of the injurious structural effects due
to expansion or contraction can take place.
The sand or other loose material used to form the joint at the base of the heater
prevents injurious mixture of the products of combustion with the fresh air that
is being warmed. It will be moreover observed that the construction of the
apparatus is such that loss by radiation is reduced to a minimum by the air
passage, and brick walls enclosing the heater on two sides with consequent gain
in economy.
The particular form of heater described may, if desired be mounted upon a
furnace constructed of materials other than brickwork.
Having now particularly described and ascertained the nature of my said inven-
tion, & in what manner the same is to be performed, I declare that what I
claim is :-
1. In apparatus for heating air the particular combination and arrangement of
parts herein described which co-operate for effecting the purposes set forth.
2. In apparatus for heating air, the combination with a brickwork or other
furnace of a tubular heater, connected to and supported by flue columns, each
having one or more than one inlet controlled by a damper or dampers, and a
curved dead end supported by a ball resting in a cup formed in the trough carrying
loose uncombustible material for sealing said heater, substantially as described and
for effecting the purposes set forth.
3. In apparatus for heating air by passing it through tubes surrounded by the
heated products of combustion, the method of supporting the tubular heater by
columns mounted as described and which convey the heated products to the
chimney..
FRANCIS M. ROGERS, 38
Agent.