Improvements in Low Pressure Steam Apparatus for Cooking, Heating, Drying, Evaporating, Steam Generating and similar purposes.
Year: 1899

page_text: Date of Application 4th Sent. 1800
Complete Specification Left, 5th June, 1900-Accepted, 28th July, 1900
Complete Specification Left, 5th June, 1900-Accepted, 28th July, 1900
Improvements in Low Pressure Steam Apparatus for Cooking, Heating,
Drying, Evaporating, Steam Generating and similar purposes.
We, EDWARD WILLIAM PARISH, Commercial Traveller, of South Knighton,
JEFFERY WILLIAM EADY, Gentleman, of Springfield Road, and ALFRED PERCY
CARRYER, Chartered Accountant, of Saint Martin's, all of Leicester, in the
County of Leicester, do hereby declare the nature of this invention to be as
follows:-
This invention relates to apparatus of the kind in which a constant supply of
hot water can be obtained therefrom simultaneously with its employment as a
cooker, heater, dryer, evaporator, steam generator or the like without inter-
fering with its effectual operation as such.
A satisfactory form of apparatus for this purpose consists of two main parts
one of which serves for effecting the cooking or other aforesaid operation and
the other of which serves for supplying the hot water, the latter part being
formed with two compartments or chambers communicating with each other at
the bottom one of such compartment or chambers being likewise connected
with the steam and water spaces respectively of the part of the apparatus
wherein the cooking or other operation above mentioned is effected. The hot
water passes from the hot water supply part of the apparatus through a pipe
leading from the aforesaid compartment or chamber which is connected with
the aforesaid water and steam spaces.
According to our invention we arrange the two compartments or chambers of
the hot water supply part of the apparatus concentrically with respect to each
other, the inner one being open at the top and the outer one closed at the top.
The inner compartment or chamber does not extend completely to the bottom
of the outer one, so that said compartments or chambers communicate at the
bottom. The upper portion of the outer compartment or chamber is connected
with the steam space of the part of the apparatus wherein the cooking or similar
operation is effected and the lower portion of said compartment or chamber is
connected with the water space thereof. The pipe for the outlet of the hot water
leads from the upper portion of the said outer compartment or chamber and the
cold water is admitted to the upper portion of the inner compartment or chamber.
It will be obvious that the relative position of the two concentric compartments
or chambers may be changed, that is to say the outer compartment or chamber
may be open at top and employed for the admission of the cold water and the
inner compartment or chamber may be closed at top and connected with the
steam and water spaces of the part of the apparatus wherein the cooking or
similar operation is performed.
According to a modification, the said hot water supply part of the apparatus
consists of a U-shaped vessel having the upper end of one of the limbs closed
and the upper end of the other limb open. In this case the cold water is admitted
to the open limb and the closed limb is connected with the aforesaid steam and

page_text: water spaces of the other part of the apparatus by suitable conduits. Prefer-
ably the open limb would be made of greater capacity than the closed limb.
The hot water passes off from the upper end of the closed limb through a pipe.
According to a further modification, the water space of the part of the apparatus
wherein the cooking or similar operation is effected, may be connected at the
bottom to a water chamber which is interposed between the said water space and
the burner or furnace of the apparatus and this water chamber may be pro-
vided with a longitudinal passage or passages for the products of combustion to
pass through. A single central conical passage will probably be found to be
most suitable. In this arrangement the hot water supply part of the apparatus
may comprise a water-jacket surrounding the cooking or similar part of the
apparatus, this water-jacket being connected with the lower portion of the
aforesaid water chamber by suitable conduits. The cold water would in this
case be admitted to a chamber or compartment provided at the side of the afore-
said water jacket and communicating with the latter by a passage at the bottom
of the said chamber or compartment. The hot water would be withdrawn from
the apparatus by a pipe leading from the upper part of the aforesaid water-
jacket or from the upper part of the aforesaid water chamber.
Dated this 4th day of September 1899
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicants,
.
Improvements in Low Pressure Steam Apparatus for Cooking, Heating,
Drying, Evaporating, Steam Generating and similar purposes.
We, EDWARD WILLIAM PARISH, Commercial Traveller, of South Knighton,
JEFFREY WILLIAM EADY, Gentleman, of Springfield Road, and ALFRED PERCY
CARRYER, Chartered Accountant, of Saint Martin's, all of Leicester, in the
County of Leicester, 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 apparatus of the kind in which a constant supply of
hot water can be obtained therefrom simultaneously with its employment as a
cooker, heater, drver, evaporator, steam generator or the like without inter-
fering with its effectual operation as such.
A satisfactory form of apparatus for this purpose consists of two main parts
one of which serves for effecting the cooking or other aforesaid operation and
the other of which serves for supplying the hot water, the latter part being
formed with two compartments or chambers communicating with each other at
the bottom, one of such compartments or chambers being likewise connected
with the steam and water spaces, respectively, of the part of the apparatus
wherein the cooking or other operation above mentioned is effected. The hot
water passes from the hot water supply part of the apparatus through a pipe
leading from the aforesaid compartment or chamber which is connected with
the aforesaid water and steam spaces.
According to one part of our invention we arrange the two compartments or
chambers of the hot water supply part of the apparatus concentrically with re-
spect to each other, the inner one being open at the top and the outer one closed
at the top. Or instead of arranging the said compartments or chambers con-
centrically we may construct the hot water supply part of the apparatus in the

page_text: form of a U-shaped vessel having the upper end of one limb closed and the
upper end of the other limb open.
According to another part of our invention, the water space of the part of the
apparatus wherein the cooking or similar operation is effected, is connected at
the bottom to a water chamber interposed between said water space and the
burner or furnace of the apparatus such water chamber being provided with a
passage or passages for the products of combustion to pass through. The hot
water supply part of the apparatus comprises a water-jacket surrounding the
cooking or similar part of the apparatus this water jacket being connected with
the lower portion of the water chamber by suitable conduits. The cold water is
admitted to the apparatus from a compartment or chamber at the side of the
aforesaid water jacket with which it communicates through a passage near the
bottom thereof.
In order that our said invention may be clearly understood and readily carried
into effect, we will proceed to describe the same more fully with reference to the
accompanying drawings in which:-
Figure 1 is a sectional elevation and Figure 2 a transverse section on the
line 11 shewing the apparatus when it is intended for cooking or similar pur-
poses and for the supply of hot water.
Figure 3 is a vertical section and Figure 4 a transverse section on the
line 22 shewing the apparatus when it is intended for heating a room or build-
ing and for the supply of hot water; the hot water supply part of the apparatus
being constructed of U-form.
Figure 5 is a vertical section and Figure 6 a transverse section on the line 3 3
shewing a modified form of the apparatus illustrated in Figures 1 and 2.
Like letters of reference indicate the same parts in all the figures.
Referring more particularly to Figures 1 to 4:
A is the part of the apparatus wherein the cooking, heating or other afore-
said operation is effected and B is the part of the apparatus for supplying the
hot water.
bis the outlet or pipe through which the hot water passes into a suitable
receptacle. This pipe may be constructed so as to be capable of turning into the
position represented by dotted lines in Figure 1, so that hot water or steam
can be directly supplied to the substance being cooked in the part A.
61 are the two compartments or chambers with which the part B is formed.
These compartments or chambers are arranged concentrically with respect to
each other in Figures 1 and 2. The outer compartment or chamber 61 is closed
at its upper end and the inner compartment or chamber 62 is open and receives
the cold water for maintaining the supply to the apparatus. The lower end of
the inner compartment or chamber 6 does not extend completely to the bottom
of the outer or surrounding compartment or chamber b', but terminates a short
distance above said bottom so as to leave a space through which the two
compartments or chambers communicate with each other. The upper portion
of the outer compartment or chamber b¹ communicates with the steam space
or upper portion a, of the part A of the apparatus by means of a conduit 63 and
the lower portion of the said compartment or chamber b' communicates with
the water space a¹ of said part A by means of a conduit b.
In Figures 1 and 2 the part A of the apparatus comprises a pan A¹ within
which the substance to be cooked or similarly treated is placed, such pan being
surrounded by a space or chamber A containing water or other suitable liquid
which is heated from a furnace A³ arranged below the said space or chamber.
The bottom of the pan A¹ is preferably made with a concavity a, in order to
assist in preventing the cold water that passes from the part B. from too quickly
rising, as it gets heated, in the space or chamber A and from too suddenly
reducing the temperature of the water at the upper portion of this space or
chamber. Baffle plates or any other suitable contrivance may however be
employed for this purpose.

page_text: The incoming cold water enters the mouth 66 immediately above the com-
partment or chamber 6 of the part B whence it passes down the said compart-
ment or chamber 6 into the lower part of the outer compartment or chamber b¹
through the bottom passage 65 between the said compartments or chambers.
It then flows through the conduit 64, into the water space As of the part A of
the apparatus, thus forcing from the upper and heated portion of the water
space As a corresponding quantity of hot water which enters the upper part of
the outer compartment or chamber b' and by rising therein escapes through the
pipe b into a suitable receptacle. The cold water as it becomes heated rises to the
surface of the said water space A ready to pass away through the chamber 6¹
and pipe b, when another quantity of cold water is admitted to the chamber 6ª.
It will be understood that so long as no cold water is poured or admitted into the
chamber 8, no hot water will escape from the apparatus and that by regulating
the quantity of cold water entering said chamber a constant supply of hot water
will be obtained from the apparatus through the said pipe b.
The upper portion of the part A of the apparatus is preferably made detachable
from the lower portion for convenience in transport.
It will be obvious that the relative position of the two concentric compartments
or chambers may be changed, that is to say the outer compartment or chamber
may be open at top and employed for the admission of the cold water and the
inner compartment or chamber may be closed at top and connected with the
steam and water spaces of the part of the apparatus wherein the cooking or
similar operation is performed.
According to the modification of the apparatus shewn in Figures 3 and 4, the
part A of the apparatus comprises a central portion or chimney A surrounded
by a water chamber A2, the walls of the said chimney A being fluted corrugated
or similarly formed as represented in Figure 4. Baffle plates A5 are arranged at
intervals in the said chimney so as to impede the passage of the products of
combustion and hot air from the burner A and facilitate the absorption of their
heat by the surrounding water chamber A³. If desired the water space in said
Burrounding chamber may be furnished with baffle plates or other suitable
contrivances to impede the upward flow of the incoming water from the part B
of the apparatus, as said water becomes heated.
In this form of the apparatus the hot water supply part B consists of a U-
shaped vessel having one limb b¹ closed and the other limb open, the open
limb being preferably of greater capacity than the closed limb. These limbs
serve the same purpose as the two compartments 61 62 in the preceding con-
struction. In this case the cold water is admitted to the upper end of the open
limb and passes by the passage 65 between said limbs to the lower part of
the closed limb 61 which communicates with the part A of the apparatus by
conduits 6, 6, as in the former case and the hot water passes from the upper
end of the closed limb by the pipe 6 to a suitable receptacle.
It will be obvious that the parts A and B of the herein described apparatus
need not be situated in close proximity to each other as shewn in the drawings.
For instance the part B may be located in the bath room of a dwelling house
and may be connected by pipes to the part A which may be situated in the
basement of the house so that hot water for use in the bath could be readily
obtained while the part A of the apparatus was being used for the cooking
heating or other aforesaid purpose.
In the modification shewn in Figures 5 and 6 the water space A³ of the part
of the apparatus wherein the cooking or similar operation is effected is con-
nected at the bottom by conduits 67 to the upper part of the water chamber B¹
which is surrounded by the water jacket B2 of the hot water supply part of the
apparatus. The said water chamber B¹ has a central conical passage B through
which the products of combustion and heated gases from the furnace A' pass.
The lower part of the water jacket is connected by conduits 68 to the lower part
of the said water chamber and the upper part of said water jacket communicates

page_text: at 69 with the upper part of the water space A surrounding the cooking or
similar part A¹ of the apparatus. B³ is the chamber or compartment into which
the cold water enters and from which it flows through the opening or passage bo
to the water jacket B. bis the pipe through which the hot water is withdrawn
from the part of the apparatus supplying the hot water.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed, we declare that what
we claim is:-
1. Apparatus of the kind herein before specified in which the hot water supply
portion thereof comprises two compartments or chambers disposed concentrically
with respect to each other substantially as described with reference to Figures 1
and 2 of the accompanying drawings for the purpose specified.
2. The modification of the aforesaid apparatus, wherein the hot water supply
portion is of U-shape substantially as described with reference to Figures 3
and 4 of the accompanying drawings.
3. The further modification of the aforesaid apparatus wherein the hot water
supply portion of the apparatus surrounds the water space of the cooking por-
tion of the apparatus and wherein a water chamber is provided between the
furnace and the said water space substantially as described with reference to
Figures 5 and 6 of the accompanying drawings for the purpose specified.
4. Apparatus having its parts constructed and arranged substantially as
described with reference to any of the examples illustrated in the accompanying
drawings for the purposes specified.
Dated this 5th day of June 1900.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicants.