Apparatus for Heating Liquids or for Maintaining them at a
Year: 1888

page_text: Date of Application, 23rd Apr., 1888
Complete Specification Left, 23rd Jan., 1889
Complete Specification Accepted, 23rd Feb., 1889:
i..
Apparatus for Heating Liquids or for Maintaining them at a
I OLIVER IMRAY of. No. 28 Southampton Buildings Chancery Lane in the County
of Middlesex Fellow of the Institute of Patent Agents do hereby declare the nature
of this invention to be as follows:-
This invention relates to apparatus which has more particularly for its object to
maintain the milk or other liquids contained in feeding bottles at the required warm
temperature for any length of time and to prevent them from "turning" or
becoming sour, which is however also applicable for maintaining liquids generally at a
uniformly warm temperature.
The apparatus consists firstly of a combustion chamber, which may be either square,
circular or oval, and which has a grating or recipient for solid or liquid combustible
matter suitable for heating purposes.
This combustion chamber is either contained in the lower part of a metal casing
which contains the receptacle for the liquid to be heated, or the chainber may be
external at the side thereof; it is provided with a small door having a circular
square or oval hole in it, closed by a moveable cover through which more or less
air can be admitted for producing the required degree of heat. In the walls of
the combustion chamber there are formed one or more passages for hot air leading
into the casing and for facilitating the draught a tube serving as chimney passes
from the chamber either through or at the side of the casing. On the combustion
chamber or slightly above it is a plate of metal or other material having a number
of holes through which the heated air passes into the casing. This isolating plate
can be arranged to draw out, when it is required to heat the casing more directly
and strongly, and it can afterwards be replaced when the liquid has been heated to the
required degree, as the perforations of the plate allow of the passage of sufficient heat
to maintain the liquid at the required temperature when this is once attained.

page_text: The casing is lined internally with layers of felt wadding or other suitable bad
conductor of heat, so as to confine the heat of the liquid and to keep the receptacle
containing the same from contact with the metal casing. The upper part of the
casing may be left open, or it may be provided with one or more hinged covers or
doors, which may also have a non conducting lining, and which are provided with
small openings having moveable covers, by means of which the retention of the heat
in the casing can be regulated.
Outside the casing is provided a thermometer communicating with the inside
thereof, so as to indicate the heat of the liquid contained in the receptacle.
As the heat given out by the sides of the combustion chamber may be considerable,
this may, be utilised by adapting against them one or more small reservoirs provided
with cocks and filled with water or other liquids and which may be either fixed or
removeable.
The apparatus is provided with a handle of any convenient form so as to be readily
portable.
'
Dated this 23rd day of April 1888

page_text: Certain Temperature.
I, OLIVER IMRAY of No. 28 Southampton Buildings, Chancery Lane, in the County
of Middlesex, Fellow of the Institute of Patent Agents, 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 which has more particularly for its object to
maintain the milk or other liquids contained in feeding bottles at the required warm
temperature for any length of time and to prevent them from "turning" or becoming
sour, which apparatus is however also applicable for maintaining liquids generally at a
uniformly warm temperature.
The apparatus consists firstly of a combustion chamber, which may be either square,
circular or oval, and which has a grating or recipient for solid or liquid combustible
niatter suitable for heating purposes.
This combustion chamber is either contained in the lower part of a metal casing
which contains the receptacle for the liquid to be heated, or the chamber may be
external at the side thereof; it is provided with a small door having a circular square
or oval hole in it, closed by a moveable cover through which more or less air can be
admitted for producing the required degree of heat. In the walls of the combustion
chamber there are formed one or more passages for hot air leading into the casing and
for facilitating the draught a tube serving as chimney passes from the chamber either
through or at the side of the casing. On the combustion chamber or slightly above
it is a plate of metal or other material having a number of holes through which
the heated air passes into the casing. "This isolating plate can be arranged to draw
out, when it is required to heat the casing more directly and strongly, and it can
afterwards be replaced when the liquid has been heated to the required.degree, as
the perforations of the plate allow of the passage of sufficient heat to maintain the
liquid at the required temperature when this is; once attained.
The casing is lined internally with layers of felt wadding or other suitable bad
conductor of heat, so as to confine the heat of the liquid and to keep the receptacle
containing the same from contact with the metal casing. The upper part of the
casing may be left open, or it may be provided with one or more hinged covers on
doors, which may also have a non-conducting lining and which are provided with
small openings having moveable covers, by means of which the retention of the
heat in the casing can be regulated.
Outside the casing is provided a thermometer communicating with the inside
thereof, so as to indicate the heat of the liquid contained in the receptacle.
As the heat given out by.the sides of the combustion chamber may be considerable
this may be utilised by adapting against them one or more small reservoirs provided
with cocks and filled with water or other liquids and which may be either fixed or
removeable.

page_text: The apparatus is provided with a handle of any convenient form so as to be
readily portable.
The construction of the above described apparatus will be readily understood on
reference to the accompanying drawings in which Fig. 1 shews an elevation of the
apparatus, Fig. 2 a plan, Fig. 3 a vertical section on line X X Fig. 2, and Fig. 4 a
sectional plan on line Y Y Fig. 3.
A is the casing, having on each side the water chambers B B and provided with a
thermometer C; D is a door to the combustion chamber, E is a handle which may
either be fixed as shewn or on hinges; F is a cover consisting of two flaps, hinged
to either side of the casing, and having firstly a central opening F1 for the neck of
the receptacle to be heated, and secondly smaller openings F closed by flaps; G is
the bottle or receptacle containing the substance to be heated; H is the combustion
chamber with removeable grate I on which is the fuel J; K is a perforated metal
plate. which separates the lower part of the casing containing the combustion chamber
from the upper part containing the vessel G L is a felt covering to the plate K
having corresponding openings, and M'is a second felt covering having no openings ;
N is a felt lining to the upper chamber for preventing the vessel G from coming in
contact with the metal, and O is the chimney flue to the combustion chamber, the
draught of which is regulated by the flap D' closing an opening in the door D.
Having now particularly described and ascertained the nature of this inven
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. Apparatus for heating liquids or for maintaining them at a certain temperature,
consisting of a metal casing closed at top by a hinged cover having holes. closed by
flaps, which casing is divided by a perforated partition into an upper chamber
containing the vessel to be heated such chamber being lined with felt or equivalent
material while the lower chamber contains an enclosed combustion chamber provided
with a chimney flue, substantially as herein.described with reference to the drawings.
2. The construction of apparatus for heating liquids or for maintaining them at a
certain temperature, combined and operating substantially as herein described with
reference to the drawings.
Dated this 23rd day of January 1889.