Improvements in Certain Furnaces for Heating, Drying, or Calcining Certain Mineral or other Substances or Materials.
Year: 1887

page_text: Date of Application, 12th Feb., 1887
Complete Left, 14th Nov., 1887
Complete Accepted, 16th Dec., 1887
Improvements in Certain Furnaces for Heating, Drying, or Calcining
Certain Mineral or other Substances or Materials.
We FRANCIS MUDIE SPENCE and DAVID DICK SPENCE both of Manchester Alum
Works Manchester in the County of Lancaster Manufacturing Chemists do hereby
declare the nature of this invention to be as follows:-
Our invention relates to furnaces such as those furnaces for heating, drying or
calcining certain mineral or other substances or materials, for which we the said
Francis Mudie Spence and David Dick Spence have made application for a patent by
application No. 2119, dated 10th February 1887, and our invention consists in a
method of supplying to the rotating bed of the furnace, the material to be operated
upon in such furnace, and of stirring or turning over the material when on the
rotating bed of the furnace, and also of removing the said material from the rotating
bed after it has been operated upon.
We supply the material to be operated upon to the annular rotating bed continuously
on the right of the left-hand diaphragm near to that diaphragm, and also near to the
inner wall of the furnace. The inaterial is carried by the continuously rotating bed
under the left-hand diaphragm, round to the right-hand diaphragm, and under that
diaphragm, and is then brought in contact with one of a series of diverters, which
diverters we place between the two diaphragms, and at such angles that each of such
diverters will deliver the material coming against it behind the next one further out,
and so on, until the said material arrives at the last of the series of diverters, which
continuously discharges it from the furnace between the two diaphragms.
We have above referred to the material under treatment in the furnace as being
carried by the annular rotating bed from the left-hand diaphragm towards and under
the right-hand diaphragm, but we would have it understood that the furnace may be
so arranged that the material in the furnace may be carried by the rotating annular
bed from the right-hand diaphragm towards and under the left-hand diaphragm, in
which case the other parts of the furnace must be arranged in an appropriate manner.
1
1
1007
W. T. CHEETHAM,
Carlton Chambers, 18, St. Ann's Street, Manchester,
Agent to the Applicants.

page_text: Improvements in Certain Furnaces for Heating, Drying, or Calcining
Certain Mineral or other Substances or Materials.
We FRANCIS MUDIE SPENCE and DAVID DICK SPENCE both of Manchester Alum
Works, Manchester in the County of Lancaster Manufacturing Chemists 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 :--
Our invention relates to furnaces such as those furnaces for heating drying or caleining
certain mineral or other substances or materials for which we the said Francis Mudie
Spence and David Dick Spence have made application for a patent by application
No. 2119 dated 10th February 1887 and our invention consists in a method of
supplying to the rotating bed of the furnace the material to be operated upon in such
furnace and of stirring or turning over the material when on the rotating bed of the
furnace and also of removing the said material from the rotating bed after it has been
operated upon.
We supply the material to be operated upon to the annular rotating bed continuously
on the right of the left hand diaphragm near to that diaphragm and also near to the
inner wall of the furnace-The material is carried by the continuously rotating bed
under the left hand diaphragm round to the right hand diaphragm and under that
diaphragm and is then brought in contact with one of a series of diverters which
diverters we place between the two diaphragms and at such angles that each of such
diverters will deliver the material coming against it behind the next one further out
and so on until the said material arrives at the last of the series of diverters which
continuously discharges it from the furnace between the two diaphragms.
We have above referred to the material under treatment in the furnace as being
carried, by the annular rotating bed from the left hand diaphragm towards and under
the right hand diaphragm but we would have it understood that the furnace may be
so arranged that the material in the furnace may he carried by the rotating annular
bed from the right hand diaphragm towards and under the left hand diaphragm
in which case the other parts of the furnace must be arranged in an appropriate
manner.
a
In order that our invention may be fully understood we hareunto annex
drawing in which Fig. 1 is a plan, Figs. 2, 3 and 4 views shewing in elevation portions
of that which is shown in Fig. 1, Figs. 5, 6 and 7 cross sections of portions of that
which is shown in Fig. 1 and Fig. 8 is a plan illustrating the application of our
invention to a furnace having a rotating bed and also flues and arranged and con-
structed in a manner similar to those described and shown in the specification
and drawings filed in respect of our application for a Patent No. 2119 dated
February 10th 1887-The sam e letters of reference are applied to corresponding
parts throughout the whole series of figures.

page_text: In the drawing hereunto annexed a is the annular rotating bed of the furnace and
band care the diaphragms employed in the furnace-The bed a rotates in the direction
indicated by the arrow A-Near to the diaphragm band near to the inner wall d of the
furnace is a hopper e by which the mineral or other substance or material to he
operated upon is supplied to the bed a-Secured to the hopper e is one end of a bar f
the other end of which is secured to a bar f¹ secured to the diaphragms b, c. g, h, j, k
are the diverters which are secured to the bar -The mineral or ther substance or
material supplied to the bed a by means of the hopper e is carried by the rotation of the
bed a beneath the diaphragm band in the direction indicated by the arrow A around
the furnace and under the diaphragm e and then against the front e² of the
hopper e-The front e' of the hopper e forms a diverter and is placed as near as may
be required to the upper surface of the bed a and is also so placed relatively to the bed a
that the mineral or other substance or material brought against it by the rotation of
the bed a will be directed behind the diverter g-The mineral or other substance or
material after being directed behind the diverter g by the front el of the hopper e is
again carried under the diaphragm b, around the furnace and under the diaphragm c
and arrives against the front of the diverter g-The diverters ghjk are so placed and
arranged that each of the diverters g h i will direct behind the one next in advance
the mineral or other substance or material brought by the rotation of the bed a against
the front of such diverter and that the diverter k will cause the mineral or other
substance or material brought against the front of it to be moved beyond the outer
edge of the rotating bed a on to an inclined plate -The mineral or other substance or
material after being directed by the diverter g behind the diverter again passes
beneath the diaphragm b, around the furnace and beneath the diaphragm cand against
the diverter by means of which it is directed behind the diverter -After being
directed behind the diverter by the diverter h the mineral or other substance or
material again passes beneath the diaphragm b, around the furnace and beneath the
diaphragm c and arrives against the front of the diverter by means of which it is
directed behind the diverter and after being so directed behind the diverter k the
said mineral or other substance or material again passes beneath the diaphragm b,
around the furnace and beneath the diaphragm c and against the front of the
diverter by means of which such mineral or other substance or material is directed
off the rotating bed a and on to the inclined plate l.
j
The front e¹ of the hopper e and the diverters ghj in causing the mineral or other
substance or material to be moved upon the bed a as above described also cause the
said mineral or other substance or material to be stirred or turned over upon the
bed a so that between the time when the mineral or other substance or material
leaves the hopper e and the time when such substance or material is discharged
from the bed a by the diverter k such mineral or other substance or material shall
be heated, dried or calcined to the required extent.
In order that the diverters ghj and k may more efficiently act upon the mineral
or other substance or material which is upon the rotating bed a we form the
diverters ghj and each in two portions B C which are connected by means of
plates and pins which form a hinge D which hinge D permits the part B of each of
the diverters g hj and k to become adjusted to the inequalities of the upper surface
of the bed a-In order that the diverters ghj and k may be adjusted relatively
to the upper surface of the rotating bed a we provide each of the diverters ghj
and with a shank E which passes througч a slot in the bar and we secure
the shank E to the bar f by means of nuts F screwing upon screw-threads formed on
the shank E or the diverters ghj and k may be secured to the bar in any other
suitable manner-
-We form the lower edges of the plates m attached to the lower
part of the diaphragm b if it be desirable, with notches or indentations n as
indicated in Fig. 3 and provide such plates m at the side next the diverters g hjk
with recurved faces o as indicated in Fig. 7-This arrangement of notches or
indentations n and recurved faces obliterates the large ridges and furrow
produced by the operations of the diverters in the mineral or other substancs
being heated, dried or calcined and causes much smaller furrows and ridges to be

page_text: formed in the mineral or other substance or material being heated, dried or
calcined and also tends to prevent air from entering the furnace at the lower
edges of the plates m attached to the diaphragm 6-The lower edges of the plates ??
attached to the diaphragmn e are without notches or indentations but have recurved
faces formed on them at the side remote from the diverters g hj k as indicated
in Fig. 6, these recurved faces q serving to level the mineral or other substance or
material upon the bed a and to prevent air from entering the furnace at the lower
edges of the plates p attached to the diaphragm c.
By employing a greater or less number of the diverters ghjk and causing the
bed a to rotate at a suitable speed the mineral or other substance or material
may be subjected for a longer or shorter period as may be desired to the action
of the flame or other gaseous heating medium.
The diverters ghj and being placed between the diaphragms b and c are not
injuriously exposed to the action of the flame or other gaseous heating medium
employed.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what we
claim is :-
1. In a furnace of the kind hereinbefore referred to, the herein before described
method of continuously supplying to the rotating bed of the furnace the mineral or
other substance or material to be heated, dried or calcined in such furnace and of
stirring or turning over the mineral or other substance or material when on the
rotating bed of the furnace and also of continuously removing the said mineral or
other substance or material from the rotating bed of the furnace after it has been
heated, dried or calcined.
2. In a furnace of the kind hereinbefore described a series of diverters such as the
front of the hopper e and the diverters ghj and k, placed in a part of the furnace
not traversed by the flame or other gaseous heating medium and constructed,
arranged, employed and operating substantially in the manner hereinbefore
described in conjunction with a rotating annular bed such as a and diaphragms such
as b and c so that as the said annular bed a rotates the mineral or other substance
or material being heated, dried or calcined is moved across the rotating bed of the
furnace one stage at each rotation of the said bed.
Dated this Twelfth day of November 1887.
W. T. CHEETHAM,
Agent to the Applicants.