Improvements in Drums for Heating Air.
Year: 1898

page_text: Date of Application, 2nd Aug., 1898-Accepted, 22nd Oct., 1898
COMPLETE SPECIFICATION.
Improvements in Drums for Heating Air.
We, CHARLES BAYHA TOURVILLE, of 4591, Kennerly Avenue, and MICHAEL
TULLY, of 4611, Kennerly Avenue, of the City of St. Louis, Mo., U.S.A., Gentle-
men, 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:-
Our invention has relation to improvements in heating drums, and consists in
the novel arrangement and combination of parts more fully set forth in the specifica-
tion and pointed out in the claims.
In the drawings, Fig. 1 is a middle vertical longitudinal section of the drum
taken on line 2-2 of Fig. 2, showing, however, the air tubes on either side of
the section line in section and the handles in elevation; Fig. 2 is a top plan
view of the drum; Fig. 3 is a top plan view with the cover plate and tubes carried
thereby, removed; Fig. 4 is a horizontal section on line 44 of Fig. 1; and
Fig. 5 is a sectional detail showing a modified form of the means for supporting
the cover plate.
The object of our invention is to construct a drum, which may be placed over
the flame of the burners in a gas or gasoline stove, whereby the heat imparted to
the drum is radiated into the room, and whereby there is induced such a circula-
tion of air to and from the drum as to insure a rapid and thorough rise in the
temperature of the air throughout the room. In detail the device may be
described as follows:
Referring to the drawings, 1 represents the upper portion of a gasoline stove
and 2 the tank supplying the hydrocarbon to the burners 3 thereof. Adapted to
be superposed over the burners 3, 3, is a drum 4 against the medial solid portion
of the perforated bottom 5 of which the flames are adapted to impinge, the said
bottom being secured to the walls of the drum a suitable distance above the lower
edge thereof, by means of angle pieces 6 riveted respectively to said bottom and
vertical walls of the drum. Secured in like manner, and at a suitable distance
above the bottom, is a perforated intercepting plate 7, the perforations of the latter
breaking joint with those of the bottom 5, (see Fig. 4). Adapted to rest, and
detachably supported on the horizontal members of a series of angular brackets 8
secured to the inner surface of the walls of the drum adjacent to the upper side
thereof, is a cover plate 9 provided with a handle 10. From the under surface
of the cover plate, and in position to communicate with the series of openings 11
formed therein, depend a number of tubes 12, the lower ends of the tubes being
substantially in alignment with the openings of the bottom and raised a slight
distance above the intercepting plate 7. The tubes are secured to the cover plate
by means of the arms or strips 13, forming an integral part of the metal of which
the tubes are constructed, the said arms being bent at right angles to the tubes

page_text: and riveted to the cover plate. As a substitute for the supporting brackets 8, we
may form or press in the inetal of which the drum is composed, an inner peripheral
circular flange or bead 14, as seen in the modification in Fig. 5.
Disposed along the peripheral wall of each tube, adjacent to its juncture with
the cover plate, are a series of openings 15, establishing communication between
the outer air and the space immediately adjacent to the inner surface of the
vertical walls of the drum. As best seen in the drawings, the preferred form of
the cross section of the drum is elliptical, the tubes 12 and the openings with
which they communicate following in a general way the elliptical disposition of
the walls of the drum, although any other form of drum (circular or polygonal)
would come within the spirit of our invention. Disposed along the vertical walls
of the drum in a line adjacent to the lower edge thereof, are a series of air induc-
tion openings 16, serving to admit air from without the drum into the space
below the raised bottom 5 thereof whereby perfect combustion is ensured for the
flame coming from the burners, and at the same time a draft is induced from
different portions of the room toward the drum, thus minimizing the time within
which the thorough heating of the room is effected. The hot air currents circulate
substantially as indicated by the arrows, the over-heating of the walls of the drum
being avoided by reason of the openings 15 which serve to conduct the hot air
from the space immediately in contact with the walls of the drum outwardly, and
make room for a fresh supply of air. The object of the intercepting plate 7 is
to retard somewhat the too rapid escape of the products of combustion, thus
giving the drum ample time to become thoroughly heated, and radiate the heat
imparted thereto to the surrounding atmosphere. It is obvious, of course, that
slight changes might be effected in the present construction without departing
from the spirit of our invention.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:-
1. A heating drum adapted to be placed over a flame, and having a perforated
bottom normally raised a suitable distance above the lower edge of the vertical
walls of the drum, a cover for the drum, a series of tubes depending from the
cover and having the lower free ends raised a suitable distance above the bottom,
a series of openings being formed in the cover and in communication with the
discharge ends of the tubes, the vertical walls of the drum being provided with
air induction openings leading to the space below the raised bottom, substantially
as set forth.
2. A heating drum adapted to be placed over a flame, a perforated bottom form-
ing a part of the .drum and normally raised a suitable distance above the lower
edge of the vertical walls of the drum, a perforated intercepting plate located a
suitable distance above the bottom, the perforations of the latter being out of
alignment with those of the plate, a cover plate for the drum provided with
perforations, tubes communicating with the perforations depending from the inner
surface of the cover plate and reaching to within a suitable distance of the inter-
cepting plate, a series of openings being formed in the peripheral walls of the
tubes adjacent to the cover plate, the walls of the drum having a series of air
induction openings, leading to the space below the raised bottom, substantially
as set forth.
3. In a heating drum, a drum proper, a perforated bottom raised above the
lower edge of the peripheral walls thereof, a perforated cover plate for the drum,
and a series of tubes depending from the cover and establishing communication
between the interior of the drum and the outer air through the perforations of
the cover, the lower ends of the tubes being removed a suitable distance above
the bottom, substantially as set forth.
4. In a heating drum, a drum proper, a bottom raised above the lower edge of the
same, the said bottom having a solid portion against which the flames are adapted

page_text: to impinge, a series of openings formed adjacent to the outer edge of the bottom,
and a series of tubes aligning with said openings, the tubes communicating with
openings formed in the top of the drum, substantially as set forth.
Dated this 2nd day of August 1898.
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicants.