Improvements in Heating Apparatus for use in Cooking or for Warming Buildings and the like.
Year: 1897

page_text: Date of Application, 15th June, 1897--Accepted, 21st Aug., 1897
[Communicated from abroad by HOWARD DE WOLFE SAWYER, of 86, Crescent Avenue,
Beachmount, Revere, Massachusetts, United States of America, Engineer.]
Improvements in Heating Apparatus for use in Cooking or for
Warming Buildings and the like.
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents,
45 Southampton Buildings, in the County of Middlesex, 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 provide improved forms of heating apparatus,
especially for household or domestic purposes such as cooking stoves, parlour stoves,
open grates and the like, in all of which a downward draft is maintained through the
fuel resting upon a tubular grate through which a constant circulation of water is kept
up, such water rising as it becomes heated and serving to heat other rooms to which it
may be conducted, after which it returns or may return to the lower part of the heater
to repeat its course.
The construction peculiar to my present invention embraces a fire pot having an
inclined water grate and reversely inclined supply pipes communicating with and
diverging from a water box or vertical table at the back or inner end of the fire box,
in combination with a front water wall made in two separate sections, one above the
other, connected for water circulation only through said supply pipes, water box and
grate tubes, the supply pipes rising obliquely from the upper part of the lower section
of said wall, and the grate tubes rising obliquely to the lower part of its upper section,
so that effective circulation is at all times maintained. By a door or doors closing
the open space between the sections of this front water wall access is had between
said pipes and tubes to the under surface of the grate, which slopes downwardly,
A mica or tough
away from said door, giving opportunity to rake the fire if desired.
glass panel may be inserted in this door to render the interior visible, and minute
An ash door at bottom of the
air inlets may admit jets or oxygen to the gas flames.
front wall permits removal of ashes when required. A fire-brick back, side walls, and
bottom (flue) are provided. The draft inlet is above the grate, through griddle holes
in the top or by a boiler opening at the upper edge of the front wall; and the
descending caloric current passes in an open flue entirely around the oven in cooking
In heaters without
stoves, giving, with a moderate fire, the most effective results.
ovens the current will take a more direct course upwardly after passing under the
fire brick or other back.
I propose to build heaters complete according to my present invention, or to
furnish the water front sections, and the grate, supply pipes and water-box suitably
arranged for insertion in ordinary stoves, in place of the usual front and fire-box.
The water supply will enter the bottom of the lower section of the water front and
the flow will be from the top of its upper section to a tank for domestic purposes, or
to radiators for return to the stove and repeated circulation, or to both tank and
radiators.
In the accompanying drawing-
Figure 1 is a vertical longitudinal section through a cooking stove embodying my

page_text: Figure 2 is a transverse vertical section on the irregular line 2-2 of Figure 1.
A represents the side wall and B the firebrick back of the fire-pot. C is the oven in
rear thereof, and D the caloric passage beneath and around the oven. Griddle holes
in the top of the fire pot furnished with covers E, serve to admit fuel and constitute
draft openings. When these holes are closed by the covers or by kettles the draft is
through the broiler opening F at top of the front, furnished with a suitable door.
Other griddle holes are formed in the stove top, over the oven.
G Gare the two independent sections of the hollow, water containing front wall,
arranged vertically and at some distance apart so as to afford access by sliding or
swinging doors H, to the space between them. The grate J extends obliquely
downward from the lower part of the upper section G¹ of this water wall.
It is composed of parallel, closely set water tubes screwed at front into said
section G¹ and at the rear or lower end into the transverse water-box K which lies
nearly in contact with the side of the oven or of the back B, allowance being made for
expansion when heated. The lower section G is connected at its upper portion with
the water box K by two or more enlarged water supply pipes L, which run obliquely
to facilitate water circulation.
It will be seen that the heated water rising from the lower section G, must pass
through the supply pipes L, the water box K, and the grate tubes J and hence that
when in use the water necessarily circulates through these parts and cannot short-
circuit directly upward as is possible under other constructions. The tubular grate
and supply pipes are therefore protected from the intensity of the heat by the constant
flow of water through them.
The door H, opening between the grate and water supply tubes, is kept closed
except when it may be necessary to rake the fire, the under surface of the grate being
readily accessible when such door is open. One or more panels of mica or tough
glass M may occupy its central portion, around which a series of small perforations p
admit jets of air to mingle with the gas flames shooting downward through the grate,
thus promoting combustion without destroying the downward draft.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, as communicated to me by
my foreign correspondent, I declare that what I claim is :-
1. In a down-draft heating apparatus, the fire-pot having a hollow, water-
containing front made in two independent sections, one above the other, in
combination with the tubular water grate extending obliquely downward from the
lower part of the upper section, the water supply pipes beneath the grate, inclined in
the opposite direction and entering the upper part of the lower section, and with the
water box at the inner or back end of the fire-box into which the converging supply
pipes and grate tubes enter, substantially as set forth.
2. In a down-draft heating apparatus, the front wall formed of two independent
water-containing sections and a door closing the open space between them, with a
draft inlet above and an ash door below said sections, in combination with a water box
at the rear end of the fire-box and with reversely inclined grate tubes and supply
pipes connecting respectively the upper and lower sections to said water box, whereby
circulation is enforced through the several parts, substantially as set forth.
Dated this 15th day of June 1897.
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.