Year: 1891

page_text: Date of Application, 8th May, 1891-Accepted, 13th June, 1891
Fig. 5 is an elevation of the apparatus.
Figs. 6 and 7 show the burner used for mixing the air and gas to produce intense
heat, Fig. 6 being a longitudinal section and Fig. 7 a horizontal section on the
line EF Fig. 6.
The stove consists of an outer cylindrical wall lined with fire bricks, and an
interior sheet metal cylinder C also lined with fire bricks, the latter cylinder
surrounding the furnace and receiving the vessel to be enamelled.
Between the outer wall or cylinder c and the inner cylinder C is arranged a sheet
metal mantle with a bottom m forming two air channels a and n, and serving to
heat the secondary air required for producing the intense gas flame. At the bottom
of the stove is arranged a pipe k for carrying off the products of combustion.
At the top is arranged a cover E and within the cylinder C is arranged a
ring of burners B receiving the mixture of air and gas which issues through the
burners.
The space within the cylinder C is separated from the air space a by the ring F
being arranged at the top of the cylinder C which has rectangular channels c so that
the gases of combustion escaping from the cylinder pass through such openings o
into the outer space a where they heat the secondary air entering the annular
space n. The gases of combustion escape ultimately through the pipe k in the
direction of the arrow.
The stove
operated as follows. The vessel G is suspended in the cylinder C.
Below the vessel, is arranged the burner B into which is introduced the gas mixed
in suitable proportions with compressed primary air, under a hydrostatic pressure of
[Price Bid

page_text: about 30 millimetres, and which is ignited at the issue orifices of the burner tubes,
that is to say directly under the bottom of the vessel to be enamelled. As such heat
would not be sufficient for melting the enamel the necessary secondary air must be
heated to a very large degree before combustion.
This is effected by the gases of combustion circulating around the suspended
vessel and escaping then through the openings o into the outer space a between the
cylinder c and the mantle, from this space they escape through the pipe k.
C
The cold secondary air comes from outside through the openings p provided in
the outside shell of the cover E between the openings o.
Through these openings p the outside air enters the second annular space n, and
passes along the walls which are heated by means of the escaping gases of combustion,
from this annular space the heated air travels to the burner B.
The radiation of the heat is prevented by asbestos covering with which the
cylinder c and the cover E are provided. An asbestos disc S is provided in the
vessel to be enamelled to prevent the heat escaping from its bottom.
In order to mix the mixture of air and gas with secondary heated air for
effective combustion, to obtain intense heat the burners are constructed as shown in
Figs. 6 and 7.
The lower burner tube B¹ into which the mixture of air and gas enters
through B2 is provided with an upward elongation 13. In this elongation is
situated the tube B' widened at the top B' and carried right through the burner B.
This tube B serves to attach the burner to the lower bottom C¹ of the cylinder C
and also for the central introduction of the secondary air up through the centre of
the burner to the flaine.
In the space between the inner tube B4 and the tube B³ is arranged the tube B7
funnel shaped at B. This tube B' divides the current of air and gas entering
through B2, one part of such current escaping towards the centre in the direction of
the arrow I, while the outer current escapes in the direction of the arrow II and
combines with the outside secondary air.
In this manner the flame is completely surrounded by secondary air and intense.
heat is obtained.
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
1st. A method of enamelling cooking vessels in which the bottom has been burnt
through, consisting in providing the vessel with a new bottom which is enamelled in
a stove so that the enamel of the new bottom combines with the enamel on the sides
or walls of the vessel thus forming a continuous coating of enamel.
2nd. For carrying out the method claimed in Claim 1 an enamelling stove in
which the heat produced by a mixture of gas and air combines with highly heated
secondary air by the arrangement of annular channels a and n and the cylinder C
so that the temperature produced is sufficient to melt the enamel, substantially as
described and illustrated.
3rd. In the enamelling stove claimed in Claim 1 the arrangement of an asbestos
disc S in the interior of the vessel to be enamelled, for the purpose of preventing
radiation of heat from the bottom of the vessel, substantially as described and
illustrated.
4th. In the enamelling stove claimed in Claim 1 the burner B' having 2 interior
concentric cylinders B7 and B4 of which B is widened at the top and serves for the
passage of the secondary air, B7 dividing the mixture of air and gas and having a
bent rim B6 in order to thoroughly mix the mixture of air and gas and secondary air
substantially as described.
FELL & WILDING,
1, Queen Victoria Street, London, E.C., Agents for the Applicant,