Improvement relating to Domestic Fireplaces.
Year: 1890

page_text: Date of Application, 25th Sept., 1890
Complete Specification Left, 29th Apr., 1891-Accepted, 6th June, 1891
PROVISIONAL SPECIFICATION
An Improvement relating to Domestic Fireplaces.
We ELOI JOHN POGGIO, and ALFREDO POGGIO, both of 20 Marylands Road
Maida Vale London, Gentlemen do hereby declare the nature of this invention to
be as follows:-
The object of our invention is to provide an improved movable hollow perforated
cone to be placed within the grate of an ordinary domestic fire to assist in the
combustion of the same. This cone I place in about the centre of the grate, and the
fire is built up around the same and by means of the perforations, the oxygen
contained by the atmosphere is conveyed to the middle of the fire and thus more
perfect combustion is obtained than in the case of an ordinary fire, although I have
referred to my invention as a hollow perforated cone, it is not a perfect cone in
section but more of an ogee form with a curved projecting base. The perforations
I propose to make in the sides of my cone are of diamond shape, but I do not limit
myself to the character of these perforations. I form my cone preferably of cast
iron and a fire provided with my cone will give off a much greater heat than a fire
not provided with my improvement. It is also of great assistance in quickly
lighting a fire as will be readily understood by the introduction of oxygen to the
interior for assisting combustion, it is also a considerable economiser of fuel, as
the combustion being more perfect, less smoke escapes, and the coal is more
perfectly burned out."
As my improvements are capable of some modification without departing from
the principle thereof, I do not restrict myself to materials or dimensions, or to the
precise form or placement of the several parts thereof.
Dated this 25th day of September 1890.
RAYNER & CASSELL,
37, Chancery Lane, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
An Improvement relating to Domestic Fireplaces.
We ELOI JOHN POGGIO and ALFredo Poggio both of 20 Marylands Road
Maida Vale London Gentlemen 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 our invention is to provide an improved moveable hollow perforated
cone to be placed within the grate of an ordinary domestic fire to assist in the
combustion of the same. This cone we place for preference in about the centre of
the grate, and the fire is built up around the same and by means of the perforations,
the oxygen contained by the atmosphere is conveyed to the middle of the fire and
thus more perfect combustion is obtained than in the case of an ordinary fire.
Although we have referred to our invention as a hollow perforated cone, it is not a
perfect cone with straight sides in section, but more of an ogee or cyma recta
form with a curved projecting base. The perforations we propose to make in the
sides of our cone are of diamond shape. We form our cone preferably of cast iron
and it is of great assistance in quickly lighting a fire as will be readily understood,
as it is the means of introducing oxygen to the interior for assisting combustion, it
is also a considerable economiser of fuel, as the combustion being more perfect, less
smoke escapes, and the coal is more perfectly consumed.

page_text: In carrying out our invention, we have designed and constructed our improved
cone with the outline shown in the accompanying drawings, and have so arranged
the interior and perforations that the pattern can be in one piece and the castings
from same are easily made. This is a great consideration in the economy of the
article produced as the pattern being in one piece, owing to the peculiar
construction of the interior of my cone and to the sectional shapes of the diagonal
perforations in same, allows the pattern to be easily withdrawn from the sand,
whereas hitherto in such articles the pattern has been in two pieces thus increasing
the cost. By this means we are able at the present market price of iron, to
manufacture our improved cones at a cost of about twelve shillings per cwt. which
produces about 72 cones, or 2d. each.
We call particular attention to the outline of our cone, which is bulged in at the
middle and broadens out towards the base. By this means when the coal is small,
it does not pack itself close against the outer surface of the cone, but has a tendency
to leave a space near the middle, which we have marked S in Figure 6 of the
accompanying drawings, and this is of material assistance to the perfect combustion
of the fire. We are aware that certain cones of a hollow and perforated nature
have been patented, but owing from their bad form and costly manufacture they
have been of no practical utility. In order that our invention may be the more
fully understood we will now proceed to describe the various figures on the sheet of
drawings hereunto annexed.
Fig. 1 is a front elevation of our improved cone.
Fig. 2 is a plan of the same looking down upon it.
Fig. 3 is a vertical section of our improved cone taken through the line C. D. of
the plan Figure 2.
Fig. 4 is a half section on line A. F. of Figure 1 and also a half section on line
F. B. Figure 1 looking down.
Fig. 5 is a part front elevation of the top of my cone shewing the diamond shaped
apertures marked × on Figure 1.
Fig. 6 shows the application of our improved cone when placed within a burning
fire.
These illustrations which are drawn about real size thoroughly explain the nature
of our invention and no particular or individual description of them is necessary
here to more fully explain them. Although we do not limit ourselves to the
material in which to make our invention, it is our intention to manufacture them
in cast iron.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. An improved hollow perforated cone for assisting the combustion of fires,
formed and manufactured substantially as hereinbefore described in this Specification
and illustrated in the accompanying drawings.
2. In an improved hollow cone for assisting the combustion of fires, the peculiar
formation of the apertures and interior arrangements by means of which the pattern
or casting used may be formed and used in one piece.
3. In an improved hollow cone the peculiar outline of the same as illustrated by
Figures 1 and 3 which prevents the coal from closely packing against the apertures
in the side of the cone.
Doted thin 90th dow of A 1001
RAYNER & CASSELL,
37, Chancery Lane, London, W.C., Agents for the Applicants.