AN IMPROVED WARM AIR STOVE
Year: 1885

page_text: I BENJAMIN VERITY of 137 Regent Street in the County of Middlesex, Gas
and Ventilating Engineer do hereby declare the nature of the said invention
for AN IMPROVED WARM AIR STOVE, to be as follows:-
This Invention relates to an improved construction of closed stove for warming
and ventilating whereby a current of fresh external air is gently warmed and
conveyed to the apartment or building to be heated.
The object of the invention is to avoid overheating or burning of the air and
the unpleasant effects resulting therefrom by preventing contact of the air with
any heated metallic surface, and I attain this object by the special mode of
construction hereafter described.
The stove which is inexpensive to manufacture and economical in operation
comprises a cylindrical fire box or chamber closed below by. a. fire clay bottom on
the slow.combustion principle, and at top by a removable.cap or dome in connection
with a flue.
The walls of this combustion chamber are constructed wholly of segmental
hollow blocks of fire clay or equivalent material forming air passages traversing
the whole height of the walls. The joints of these segmental blocks being keyed
together by a luting of plastic material such as to allow. for. expansion and
contraction, run into grooves in the blocks the whole being bound together by, a
sheet metal casing.
The air passages communicate at bottom with a common chamber in the base of
the stove into which leads an inlet from the exterior of the building, an air wash
being provided in such inlet if desired for cleaning the incoming air.
The air passages lead into an annular chamber at top of the stove whence a pipe
conveys the warmed air. to the place required. This annular. chamber has, a
removable top or: cover formed in segments. to facilitate cleaning the air. flues
which may be done without taking the stove to pieces as in other warm air stoves.
Dated this 28th day. Anril 1885.

page_text: I, BENJAMIN VERITY of 137, Regent Street, in the 'County of Middlesex Gas
and Ventilating 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:-
This Invention relates to an improved construction of closed stove for warming
and ventilating; whereby a current of fresh external air is gently warmed and
conveyed to the apartment or building to be beated.
The object of the Invention is to avoid, overheating, or. burning of the air, and
the unpleasant effects resulting therefrom, by preventing contact of the air with
any heated metallic surface; and I attain this object by the special mode of
construction hereafter described with reference to the accompanying Drawings
forming part of this Specification wherein Figure 1 is a vertical section, and
Figure 2 a horizontal cross section, of a stove.
The Stove, which is inexpensive to manufacture and economical in operation,
comprises a cylindrical fire-box or chamber A closed below, on the slow combustion
principle, by a fire-clay bottom B, and at top by a removable cap or dome Cin
connection with a flue D. The walls of this combustion chamber A are con-
structed wholly of hollow blocks of fire-clay or equivalent material E in the form
of segments of a circle, as shown in Figure 2, the radial and horizontal joints of
these segmental blocks being keyed together by a luting material of preferably
what is known as "Purimachos" cement or a similar material, such as to allow for
expansion and contraction, run into grooves e in the blocks, the whole being bound
together by a sheet metal casing F. The walls of the stove are built up of
superposed courses of these hollow blocks E, the thoroughfares through each course
of blocks coinciding with those of the courses above and below, and forming air-
passages G traversing the whole height of the walls. These air-passages G
communicate at bottom with a common chamber H in the base of the 'stove and
into an annular chamber I at top of the stove whence a pipe K conveys 'the
warmed air to the place required. This annular chamber I has a removable top or
cover i formed in segments to facilitate cleaning the air flues which may be done
without taking the stove to pieces as in other warm air stoves. The chamber A is
provided at bottom with an opening L of segmental form leading through'the wall of
the stove, and closed by one or more sliding or other doors l for regulating the draft,
the said opening being lined with metal forming part of the sheet metal casing F.
The bottom of the said casing extends beneath the brick-work; as shown and has
apertures corresponding to the air-passages through the walls. The chamber H is
of cast iron, and is strengthened internally to support the weight of the brick
work. An air-inlet tube M leads from the exterior of the building into the bottom
of this 'chamber, anyair wash being provided in such inlet tube, if desired, to
cleanse the incoming air, such air wash consisting of a jet of water projected
from a nozzle N in the air inlet tube which, in that case, is provided with a
trapped outlet m for the water which drains thereto. The pipe K for conveying
away the warmed air is only required when the heat is to be conveyed to another

page_text: apartment when the stove is placed in the apartment to be heated, the pipe K
would not be used, but the top of the chamber I would be perforated to let out
the heated air. In the latter case the dome C might be dispensed with, and the
flue D would lead from the upper part of the chamber A as indicated in dotted
lines horizontally through the wall of the stove so as not to be unsightly. The
course of the air through the stove is indicated by the arrows.
Having now particularly described and ascertained the nature of the said
Invention, and in what manner the same is to be performed I declare that what
I claim is
1. A stove constructed of hollow segment shaped blocks of fire clay, surrounding
a central fire chamber, and forming air passages extending through the walls, said
passages being in communication with an inlet chamber below, and with an outlet
above, substantially as herein described, and shown in the Drawings.
2. A stove constructed of hollow segment shaped blocks of fire clay surrounding
a central fire chamber and enveloped in a sheet-iron casing and forming air
passages extending through the walls, said passages being in communication below
with an air chamber provided with an air inlet, and above with a suitable exit, the
fire chamber being closed at bottom, and cut off, by refractory materials, from
the air current to be heated, substantially as described, and represented in
the Drawings.
3. The improved Stove constructed and arranged for operation as herein
described, and represented in the Drawings.