Improvements in Air Warming Stoves.
Year: 1893

page_text: Date of Application, 20th July, 1893-Accepted, 26th Aug., 1893
שגע
[Communicated from abroad by ISAAC DAVID SMEAD, of Toledo, in the State of
Ohio, United States of America, Engineer.]
Improvements in Air Warming Stoves.
We, BLACKMAN VENTILATING COMPANY LIMITED, of No. 63 Fore Street, in
the City of London, 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 present invention relates to stoves or air warmers applicable for warming
and ventilating large buildings, for which a large volume of air is used.
The accompanying drawings illustrate the construction of the stove and the
arrangement of the smoke and heating flues or pipes according to this invention.
Fig. 1 is a longitudinal section.
Fig. 2 is a plan.
Figs. 3 and 4 are transverse sections on X X and Y Y of Fig. 1 respectively
and
Figs. 5, 6, 7, 8 and 9 shew details.
The body of the furnace consists of a series of peculiarly formed sections so that
a narrow section can at any time be removed and another substituted. Each of
these sections is provided with radiating flanges or ribs of considerable width, and
the heat and smoke flues are arranged so as to reduce the height of the stove
adapting it to be set in low basements or cellars.
The fire box B consists of a number of separate castings S of arched or horse
shoe form as shown in Fig. 5 and in cross section in Fig. 8. Each section S is
provided with a laterally projecting flange or web f which has at its outer edge a
bead or enlargement n, and at its base on one side a recess or groove v, and opposite
this groove on its opposite face it is provided with a rib t adapted to fit in the
groove of the adjoining section as shewn in Fig. 8 which represent three of these
sections bolted together by bolts o. When put together, the groove v and the
space a between the rib t and the body of the section is filled with asbestos cement.
Thus the walls of the fire box are composed practically of two thicknesses of metal
with an interposed layer of cement, and even if the inner layer of metal should be
burned and become more or less fractured, the body walls of the fire box would
still remain tight. The bead n on the edge of the flange f strengthens it rendering
it less liable to be cracked or broken. Should one of these sections become injured,
by simply removing the bolts o, it can be removed and a new one can be substituted
without disturbing the other parts of the stove.
When the fire box is made of a
series of narrow sections in this way, it is much less liable to crack and warp by
the heat than when it is made, as usual, of large pieces.
The combustion chambers CC in rear of the fire box are constructed in the same
manner, the sections being varied somewhat in outline as shown in Figs. 6 and 9
and having their body portion or inner face made narrower. These sections are
provided with grooves like the others, and are fastened together by bolts, the
joints being filled with cement in the same manner, as shown in Fig. 9, which
represents three of these sections united.
These two combustion chambers at their rear ends are connected to what may be
termed a smoke chamber D, which is composed of a series of sections S of the
same size and general form as those of which the fire box is formed.
In rear of this smoke chamber D, and connected thereto by a short tube d there
is a chamber E which serves as a connection between the stove proper and the
smoke and heat pipes. This chamber E is preferably made rectangular of cast
iron plates, from the outer face of which ribs or flanges project as shown. It has a

page_text: door m at its rear for cleaning out soot and ashes from time to time. At its front
it has an opening leading to a smoke and heat pipe F, preferably formed of cast
iron rings or sections provided with laterally projecting ribs or flanges, as shown in
Fig. 7, these rings being bolted together. The pipe extends forward under the
stove nearly to the ash pan A and its front is connected to a transverse pipe G
which projects towards each side to be connected at either end to the chimney.
In order to provide a direct draught for starting the fire, or to increase the
draught when required, a vertical pipe K extends from the top of the chamber E
to the chimney having in it a damper valve the axis of which extends to the
front of the stove where it can be operated by the attendant.
By constructing the body of the stove of narrow sections as above described,
stoves can be made of several different sizes without additional patterns, as it is
only necessary to vary the number of sections employed.
Stoves and radiators are often made with ribs projecting from their exterior
surfaces for conducting the heat more effectually to the air around them; but as
these ribs usually project little they have little effect. By the plan described the
entire structure is provided with ribs or flanges much wider than those ordinarily
used, and each being a separate section can be cast with the bead n and the bolt
holes all complete.
The cold air admitted to the heating chamber through arches or openings
arranged along one side at the bottom, as indicated by the arrows, first comes in
contact with the smoke and heating pipes F and G and the ash pan A, then it rises
in contact with the fire box and other parts which impart to it additional heat, and
the air thus heated passes away by a flue L or several of these.
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 stove having its body and pipes composed of a series of sections or castings,
each provided with a laterally projecting flange f with holes therein for bolting
the sections together, and with grooves and ribs cemented, substantially as shown
and described.
2. In combination with a stove such as is above referred to, pipes or flues
arranged to convey the products of combustion below or along the bottom of the
stove, substantially as and for the purpose set forth.
3. The combination in a stove or air warmer, of a fire box B, duplicate com-
bustion chambers C. C, smoke chamber D, rear chamber E, with pipes arranged to
convey the products of combustion first along below the stove, thence across and
to the chimney, and a pipe K leading direct to the chimney and provided with a
damper valve, all constructed and operating substantially as herein set forth.
Dated this 20th day of July 1893.
ABEL & IMRAY,
Agents for the Applicants.