Improvements in Means for Introducing, Diffusing, and Regulating the Air Blast to Cupolas for Melting Metal.
Year: 1896

page_text: Date of Application, 25th Aug., 1896
Complete Specification Left, 25th May, 1897-Accepted, 25th Aug., 1897
Improvements in Means for Introducing, Diffusing, and Regulating
the Air Blast to Cupolas for Melting Metal.
I FREDERIC O'CONNOR PRINCE. of 37, Cursitor Street London E.C.,
Civil Engineer do hereby declare the nature of this invention to be as follows:-
According to this invention the blast is first passed into an air belt of usual
construction but instead of being passed in to cause the blast to impinge direct
against the casing, the blast is pressed in a line with the path of the belt, and so
at once runs around. A baffle plate or check is arranged in the belt near the air
inlet to prevent the racing of the air round the belt and to concentrate the air.
The inlet for the air to the fire is by a series of holes round the casing communicat-
ing with the fire. To regulate the quantity of air to be passed into the fire, each
hole has a sliding shutter which can be moved partially over the holes. To enablo
the whole of the shutters to act simultaneously by a single operating handle they
are fitted to a ring encircling the casing, the ring has a hinged connecting rod
projecting outside the belt, the outer portion may be screw threaded, and engage
a revolving nut actuated by a hand wheel, the turning of which slightly moves
round the ring. By this means the quantity of air to the fire can be regulated as
desired without choking the passage of the air in the main.
Dated this 25th day of August 1896.
Improvements in Means for Introducing, Diffusing, and Regulating
the Air Blast to Cupolas for Melting Metal.
I, FREDERIC O'CONNOR PRINCE, of 37, Cursitor Street, London, E.C.,
Civil Engineer, 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:-
According to this invention the blast from the fan or blower is first passed into
an air belt of usual construction but instead of being passed in to cause the blast
to impinge direct against the casing, the blast is passed in in a line with the path of
the belt, and so at once runs around. A check plate is arranged in the belt near the
air inlet to concentrate the air and to prevent it racing round the belt. The inlet
for the air to the fire is by a series of holes round the casing within the air belt
communicating with the fire. To regulate the quantity of air to be passed into the
fire, each hole has a sliding shutter which can be moved partially over the holes.

page_text: To enable the whole of the shutters to act simultaneously by a single operating
handle, they are fitted to a ring encircling the casing or formed as a ring with
holes corresponding to the air holes. The ring has a hinged connecting rod pro-
jecting outside the belt, the outer portion may be screw threaded and engage a
revolving nut actuated by a hand wheel, the turning of which slightly moves
round the ring, and so partially closes or opens the air holes.
By this means the quantity of air to the fire can be regulated as desired without
choking the passage of the air in the main.
To enable this invention to be better understood reference should be made to the
accompanying drawings, in which Figure 1 being a side elevation of so much of
a cupola necessary to illustrate the invention. Figure 2, a sectional plan, A, the
furnace, B, the brick lining, C, the blast holes, 1), the outer iron case, E, circular
Bir belt passage secured upon the case D; 1, blast pipe from fan, G, a flat belt
upon the case D, this belt has a number of holes H, of the same size as the blast
boles C, and arranged to correspond with same as regards position. This belt is
held in position by studs J, working in slots K, connected to the belt is a bracket L,
with a pivoted rod M, which passes through the casing of belt E, and has the outer
end screw threaded for a portion of its length which engages a screw nut N,
secured by brackets 0, this nut is fitted with a hand wheel P. It will be at once
understood that turning this wheel in either direction correspondingly moves the
belt G, and causes the holes H, to control the amount of air passing to fire through
holes C. At the entrance of the blast the air belt is fitted with a check plate Q,
to prevent the air racing round, and to cause it to become congested.
Having now particularly described and ascertained the nature of this invention
and in what manner the same is to be performed I declare that what I claim is:
The means hereinbefore described for introducing diffusing and regulating the
air blast to cupolas for melting metal, consisting of, (a) the introduction of the
air blast into the belt, in the direction of the belt the belt having a check plate to
prevent the air racing round. (b) regulating the supply of air to the fire by a
sliding arangement over the air holes operated from outside the air belt.
of 100%