Improvements in Low Pressure Steam Apparatus for Cooking, Steam Generating, Water Heating, Drying, Evaporating, and similar purposes.
Year: 1897

page_text: Date of Application, 31st May, 1897
Complete Specification Left, 2nd Sept., 1897-Accepted, 28th May, 1898
PROVISIONAL SPECIFICATION.
Improvements in Low Pressure Steam Apparatus for Cooking, Steam
Generating, Water Heating, Drying, Evaporating, and similar
purposes.
I, EDWARD WILLIAM PARISH, of No. 1, Elmdale Street, Belgrave, Leicester,
in the County of Leicester, Traveller, do hereby declare the nature of this inven-
tion to be as follows:-
This invention relates to improvements in low pressure steam apparatus for
cooking, generating steam or rapidly heating a regulated quantity of liquids, with
independent automatic water feed and is designed for use in laboratories, breweries,
public institutions, and also for general purposes, cooking at a temperature regu-
lated not to exceed 205°F. To carry out my invention I employ a jackelted pan
of a suitable size, shape and dimensions the inner pan having its bottom indented
with a view to increase the water space between the inner and outer walls of the
jacketted pan coming immediately over a portable furnace, said furnace fits within
a flange or extension from the outer wall of the jacketted vessel. At a suitablo
distance from the bottom of the outer pan is fitted a connecting pipe with union to
connect to another pipe of a similar diameter from an independent feed cylinder,
another pipe similarly connected is fitted at a suitable distance from the top of the
outer pan which also enters the feed cylinder for the outlet passage of steam into
a mantle or cover covering the holes of said pipes, the bottom of said mantle or
cover reaching within a short distance from the bottom of the feed cylinder, such
cylinder is arranged as an acting check feed to the jacketted pan, producing an
alternating effect between the pressure of steam from within and the air pressure
from without acting upon the surface of the water in the feed cylinder, .and supply-
ing the water equivalent to the steam blown off, which does not take place until the
temperature has reached 205°F. In such manner is the feed water regulated by
tho alternate pressure of steam and air, and heated direct from the furnace. When
the temperature has reached 205°F. the surplus steam is discharged either into the
flue pipe or into a separate steaming chamber by employing a valve or cock turn-
ing two ways.
An annular ring carrying suitable packing is screwed down to cover the space
between the two walls of the jacketted pan, which can be removed if it is necessary
at any time to take out the inner pan for cleaning purposes.
The apparatus is also useful for rapidly heating water on the geyser principle
by inserting a tap in the outer pan at a suitable height from the bottom, a limited
supply of water being conveyed from the feed cylinder which circulates between
the walls of the jacketted pan and can either be forced up a tube inserted therein
by steam pressure or drawn off as desired.
A lid may be fitted to the inner pan and secured in any convenient manner,
and the bottom of the automatic feed cylinder may rest upon feet, or upon a collar
or block fitted to the flue or smoke pipe from the furnace.
The food containing pan may be used for the purpose of evaporating liquids,

page_text: grain or the like by removing the lid when the moisture contained therein will
be thrown off by evaporation.
DL LouL
1007
W. BESTWICK MAXFIELD,
Applicant's Agent.
Improvements in Low Pressure Steam Apparatus for Cooking, Steam
Generating, Water Heating, Drying, Evaporating, and similar
purposes.
I, EDWARD WILLIAM PARISH, of No. 1, Elmdale Street, Belgrave, Leicester,
in the County of Leicestor, Traveller, do hereby declare the nature of this inven-
tion 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 low pressure steam apparatus for cook-
ing, steam generating, water heating, drying, evaporating and similar purposes.
Such heating of liquids is carried out in regulated quantities by aid of an inde
pendent water feed which is designed for use in laboratories, breweries, public
institutions, dwellings and other general and convenient places.
That my invention may be well and clearly understood drawings are annexed
in which Figure 1, Sheet 1 is a front view of the apparatus. Figure 2 a sectional
view of same. Figure 3 a modification in the form of a coned cylinder jacketted,
with a corrugated Hue, the heat and smoke controlled by baffle plates as hereinafter
further described. Figure 4 is a top view of the previous figure with feed con-
nected thereto, and Figure 5 Sheet 2 shows the apparatus applied to an ordinary
bath, and hereinafter further described.
"
The same letters of reference are used to indicate like parts in the several views.
In carrying out this invention an outer cylinder or pan A is employed of a suit-
able size and shape and of suitable dimensions into which is fitted the food con-
taining pan, or inner cylinder B "see Figure 2" which is provided with an indented
bottom to increase the water space between the inner and outer walls of the
apparatus, and immediately over the portable furnace C, said furnace fitting within
the flange or extension from the bottom b' of the outer pan A. At a suitable dis-
tance from the said bottom b' of the outer pan is fitted the lower connecting pipe D
leading to the expansion chamber F of the open mouthed feed cylinder G, the other
pipe E preferably supplied with a nozzle e see Figure 2" is fitted at a suitable
distance from the top of the outer pan and through which the steam or heated
water is passed into the expansion chamber, mantle or cover F, and when desired
out of the supply pipe II, said pipe is also shown in dotted line Figure 1-pointing
to the food containing pan, indicating that it may be turned or fixed in this
direction if necessary, or the said pipe may have two arms with taps thereto con-
verging in opposite directions, (not shown) the bottom edge of the wall of the
expansion chamber is shown in the drawings as not reaching to the bottom of the
feed cylinder G to admit of the feed water passing into the pipe D, but the said
expansion chamber, mantle or cover F may reach to the bottom and have per-
forations therein to obtain the same result.
If a constant supply of cold water or other liquid is passed into the mouth of
the feed cylinder a regular discharge is obtained from the pipe or nozzle H without
interfering with the cooking operation. When the temperature has reached
205°F. all surplus steam is discharged through the one or two way pipe II or if
necessary can be conveyed into a separate steam chamber. The annular ring I

page_text: seen in Figure 2 carries suitable packing and is screwed down to the outer pan,
and upon it rests the outwardly bent edge or flange of the inner pan see Figure 2
so allowing of the said inner pan to be taken out for cleaning, upon removing tho
screws 3. A modification is shown in Figures 3 and 4 Sheet 1 of the drawings
which consists of a conical shaped apparatus A' and a fluted or corrugated inner
cylinder B, a rod 63 carrying baffle plates & so causing the heat from the lamp
and flue pipe to impinge against the sides of the flue or corrugated inner
cylinder B, the feed cylinder G is attached by the connecting pipes D and E.
For flushing out any sediment that may settle at the bottom of the outer pan a
screw plug 65 is employed see Figures 1 and 5," and water is poured into the
mouth of the feed cylinder G. The lid employed for covering the food containing
pan is of the ordinary kind. The apparatus may be of any other suitable shape
or shapes than shown without departing from the spirit of this invention.
"
The inner, " or food containing pan "may be used for evaporating liquids, grain
or the like by removing the lid when the moisture contained in the vessel will be
thrown off by evaporation. With reference to Figure 5 Sheet 2 of the accompany-
ing drawings it will be observed that two floors K are shown through which are
passed two pipes, the one L for receiving the supply from the upper feed cylinder
supplied from the tap 1, and the other L' to convey the hot water up to the expan-
sion chamber of the upper feed cylinder and through the pipe H into the bath M
from the apparatus A in the basement. When the feed cylinder in the base-
ment is not required the cocks J can be turned off. By these arrangements a hot
bath can be procured in a short time after lighting the furnace, and there is no
fear of bursting the cylinders by frost as is now the case in fixing cylinders at the
back of kitchen boilers. The feed cylinder may also be attached to the jacketted
apparatus, or outer pan without the connecting pipes D and E by having holes
through both coming directly opposite to each other upon being put together by
screws or rivets, as the case may be.
Or the feed oylinder may be connected to the outer pan in any other equivalent
manner.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is:-
1. A low pressure steam apparatus for cooking steam generating, water heating,
drying, evaporating and similar purposes consisting of an outer pan, an inner food
container, a feed cylinder G arranged therewith and provided with a blowing or
drawing off pipe as H, in combination, substantially as described with reference to
Figures 1, 2 and 5 of the accompanying drawings.
2. A low pressure steam apparatus for heating water or other liquids, consisting
of a coned outer cylinder, a fluted inner cylinder in combination with a feed
cylinder of the character as described with reference to Figures 3 and 4 of the
accompanying drawings.
3. An open mouthed feed such as G consisting of an outer case or cylinder, an
expansion chamber, mantle or cover such as F open at the bottom and covering
inlet and outlet holes from an outer pan, a blow off pipe fitting within said expan-
sion chamber for the purpose substantially as described and referred to in the
accompanying drawings.
Dated this 20th day vi August
W. BESTWICK MAXFIELD,
19, Bowling Green Street, Leicester, (Regd. Patent Agent),
Applicant's Agent.