Improvements in Gas Grates or Stoves.
Year: 1898

page_text: Date of Application, 23rd July, 1898
Complete Specification 1 oft 21st Anr 1800 Accented 8th July 1899
Improvements in Gas Grates or Stoves.
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 to be as follows:-
This invention relates to improvements in gas grates or stoves, such improve-
ments comprising:
1. A novel corrugated or undulated plate arrangement resulting in a large
increase in the heating surface of the appliances upon which they are arranged,
and consequently imparting to such appliances a greatly increased heating power
for a given volume.
2. A novel arrangement for assembling and mounting the said plates.
3. A novel arrangement in the heating appliances of a damper or key serving
to increase the heat given off by the appliances upon which such an arrange-
ment can be advantageously applied.
4. A special arrangement of regulating cock or tap.
The first improvement consists in replacing the plates of smooth or uniform
surface hitherto employed in the grates of gas stoves by plates one of the faces
of which is corrugated or undulated enabling the provision of an increased heat-
ing surface, of more efficaciously retaining the hot gases and of producing appli-
ances in which the heat is utilised under the most advantageous conditions.
The corrugations of these plates may be of various forms;, nevertheless, the
three order form having oblique faces, is that which I have found to give the
best results, both as regards the heat given off and facility of construction.
In the same manner as is the case with plates having entirely plane surfaces,
these novel corrugated plates communicate one with another in pairs, either at
their extremities by means of junction boxes or chambers, or by means of one
or more conduits fixed at certain points in their length, according to the direc-
tion which it is desired to impart to the hot gases.
Second Improvement.-As above stated, these novel plates are constituted by
means of a flat under portion and by corrugated upper portion; these two por-
tions are united by means of two cast ends which are cast with corrugations
corresponding to those of the upper portion of the corrugated plate. In order to
effect a perfect and absolutely tight assemblage of the plane and corrugated
faces of the plates and the two cast ends, a flange is formed along the whole of
the corrugated periphery of the upper plate, which flange enters an undulated
recess or groove formed in the casting of the ends, and somewhat wider than the
thickness of the flange upon the upper corrugated plate.
The cast ends are rigidly connected one with the other at intervals by means
of tension rods passing right through the plate in one of its corrugations.
As regards the assemblage of the flat under portion with the two ends, this is

page_text: effected by turning down the extremity of this under portion upon the beading
which is cast upon the lower portion. of these end pieces for that purpose.
Finally, the joint of the upper corrugated plate with the ends is rendered
absolutely tight by means of a suitable mastic which is introduced within the
undulating groove in the end pieces before effecting the assemblage by means of
the tension rods.
The form of these corrugated plates renders them easy of construction; the
number, length, form and dimensions of their corrugations may vary, according
to the heating effect which it is desired to obtain.
Third Improvement. By means of the damper which has been mentioned as
serving to effect, by its novel application to heating appliances, a considerable
increase in the heat radiated, may be produced by a simple and instantaneous
manipulation, the conduction of the hot gases either within the inclined plates
which have been referred to, or their supplementary circulation through other
vertically arranged plates similar to the first.
The plate arranged in front of the reflector, is open at both ends; the face is
closed in order to compel the air to be in more intimate contact with the cor-
rugated walls and to reach the row of gas burners at a higher temperature.
Direct communication with the inclined plates is necessary upon first light-
ing the stove in order to prevent any of the unburnt gases from being forced
back into the room; this is obtained by suitably operating the damper. When
a draught is established it is only necessary to bring the damper to the opposite
position in order to increase the amount of heat radiated, by causing the gases to
traverse a longer distance and enabling the heating of the air required for the
combustion of the gas.
Fourth Improvement. In order to facilitate the manipulation of the cock for
the admission of gas to the apparatus and to prevent any possibility of error the
key is provided with a hand or pointer having a spring button which pointer
when partially rotated by means of an operating handle or hand-wheel, is dis-
placed upon a dial provided with notches or recesses on which are marked the
indications; open; half-open; lighter; closed.
Dated this 23rd day of July 1800
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
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:
This invention relates to improvements in gas grates or stoves, such improve-
ments comprising:
=
1. A novel corrugated or undulated plate arrangement resulting in a large
increase in the heating surface of the appliance upon which they are arranged,
and consequently imparting to such appliances a greatly increased heating power
for a given volume.
2. A novel arrangement for assembling and mounting the said plates.
3. A novel arrangement in the heating appliances of a damper or key serving
to increase the heat given off by the appliances upon which such an arrange-
ment can be advantageously applied.

page_text: 4. A special arrangement of regulating cock or tap.
These various improvements are illustrated in the accompanying drawing as
being applied to a gas stove;
Figure 1 is a rear elevation, the back of the stove being omitted;
Figure 2 is a cross-section upon the line 1-2 Figure 1;
Figure 3 represents part of a corrugated plate;
Figure 4 represents the arrangement for assembling and mounting the plates
and
Figures 5 and 6 illustrate the regulating cock.
The first improvement consists in replacing the plates of smooth or uniform
surface hitherto employed in the grates or gas stoves by plates one of the faces
of which is corrugated or undulated, enabling the provision of an increased heat-.
ing surface, of more efficaciously retaining the hot gases and of producing appli-
ances in which the heat is utilised under the most advantageous conditions.
The corrugations of these plates may be of various forms; nevertheless, the
three sided form illustrated in Figures 1 and 3 having oblique faces, is that
which I have found to give the best results, both as regards the heat given off
and facility of construction.
In the same manner as is the case with plates having entirely plane surfaces,
these novel corrugated plates P communicate one with another in pairs, either
at their extremities by means of junction boxes or chambers such as L, or by
means of one or more conduits B fixed at certain points in their length, accord-
ing to the direction which it is desired to impart to the hot gases.
In
Second Improvement.-These novel plates are constituted by means of a flat
under portion J and by a corrugated upper portion J1, the said portions being
united by means of two cast ends F (see Figure 4) which are cast with corruga-
tions corresponding to those of the upper portion of the corrugated plate J¹.
order to effect a perfect and absolutely tight assemblage of the plane and corru-
gated faces of the plates and the two cast ends, a flange is formed along the
whole of the corrugated periphery of the upper plate, which flange enters
undulated recess or groove a formed in the casting forming the ends, and some-
what wider than the thickness of the flange upon the upper corrugated plate.
The cast ends F are rigidly connected one with the other at intervals by
means of tension rods T passing right through the plate in one of its corruga-
tions.
an
As regards the assemblage of the flat under portion J with the two ends, this is
effected by turning down the extremity of this under portion upon the beading F¹
which is cast upon the lower portion of these end pieces for that purpose.
Finally, the joint of the upper corrugated plate with the ends F is rendered
absolutely tight by means of a suitable mastic which is introduced within the
undulating groove in the end pieces before effecting the assemblage by means
of the tension rods T.
The form of these corrugated plates renders them easy of construction; the
number, length, form and dimensions of their corrugations may vary. according
to the heating which it is desired to obtain.
Third Improvement. By means of the damper which has been mentioned as
serving to effect, by its novel applications to heating appliances, a considerable
increase in the heat radiated, may be produced by a simple and instantaneous
manipulation, the conduction of the hot gases either within the inclined plates
which have been referred to, or their supplementary circulation through other
vertically arranged plates similar to the first.
The plate R Figure 2 arranged behind of the reflector, is open at both ends,
the face is closed in order to compel the air to be in more intimate contact with
the corrugated walls and to reach the row of gas burners S at a higher tem-
perature.
When setting the apparatus alight, the damper or flap V is set as shown in
full lines in Figure 2, so as to permit the gas to escape quickly, experience

page_text: It
having shown that by causing the gas to make too long a passage, the draught
will not be induced; and the apparatus. thereby become extinguished. But after
the walls of the passages have become heated this inconvenience disappears owing
to the hot gas naturally rising to the upper parts. Thereupon the damper or
flap V is adjusted to the position V₁shown in dotted lines in Figure 2, so that
gas is now obliged to travel in the direction indicated by the dotted arrows.
will be noticed that this is the longest way, the length being increased by baffle
plates which are clearly shown in Figure 1 of the drawing: the gas will thus
give up most of its heat before escaping into the chimney. The plate Ris
open at both ends c and d and thus permits of the free circulation of the air,
which thereupon comes into contact with the gas pipe S so as to effect com-
bustion.
Direct communication with the inclined plates is necessary upon first lighting
the stove in order to prevent any of the unburnt gases from being forced back
into the room; this is obtained as mentioned above by causing the damper V to
occupy the position indicated by the full lines. When a draught is established,
it is only necessary to bring the damper to the opposite position V₁ (shown in
dotted lines) in order to increase the amount of heat radiated, by causing the
gases to traverse a longer distance and enabling the heating of the air required
for the combustion of the gas.
Fourth Improvement. In order to facilitate the manipulation of the cock for
the admission of gas to the apparatus and to prevent any possibility of error, the
plug of the cock (see Figures 5 and 6) is provided with a hand or pointer A
having a spring button A, which pointer when partially rotated by means of
an operating handle or hand-wheel D), is displaced upon a dial Z provided with
notches or recesses on which are marked the indications: open: half-open
lighter: closed.
Having now particularly described and ascertained the nature of this 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 in gas grates or
stoves is:
1. The arrangement for the purpose described of undulated plates instead of
flat plates, also their application to all other kinds of heating appliances whether
for gas oil or wood.
2. The manner of assembling and mounting these undulated plates as described
and illustrated.
3. The novel arrangement of a damper enabling the direct or reversed issue
of the combustion gases, as above described, also the application of this damper
in appliances which are provided with undulated plates or with any other heating
appliances.
4 The general arrangement of the regulating cock as described and illustrated.
Dated this 21st day of April 1899.
HASELTINE, LAKE & CO.,
45, Southampton Buildings, London, W.C., Agents for. the Applicant.