Improvements in Chilled and other Rolls and in the Manufacture of the same.
Year: 1888

page_text: Date of Application, 11th Feb., 1888
Complete Specification Left, 12th Nov., 1888
Complete Specification Accepted, 15th Jan., 1889
PROVISIONAL SPECIFICATION.
Improvements in Chilled and other Rolls and in the Manufacture of
the same.
I JOSEPH BETTS BRADSHAW of Handsworth Woodhouse near Sheffield in the County
of York Iron Manufacturer do hereby declare the nature of my said Invention for
"IMPROVEMENTS IN CHILLED AND OTHER ROLLS AND IN THE MANUFACTURE OF THE
"to be as follows:-
SAME
Although my Invention is more particularly applicable to chilled rolls, it is likewise
applicable to Grain Rolls whether in Iron Steel or other Metal.
The objects of my Invention are two fold, first to produce Rolls the chilled surfaces
of which shall be harder than is obtainable by the ordinary processes of manufacture,
and secondly, to provide the means by which Rolls may be more uniformly and
rapidly cooled.
I effect these objects by constructing each roll with an internal coil of pipe or
pipes, cast in its body or barrel, concentric with and parallel to its axis, the
bore of the pipe and the diameter of the coil being regulated by the size of
the roll.
The method by which the coil of pipe or pipes would be cast within the body of the
roll would be somewhat similar to that employed for casting the Wrought Iron
Coils in Blast Furnace Tuyeres, that is to say, the coil would first be placed in the
required position within the chill or mould, and the molten metal would be after-
wards poured into the mould so as to surround the coil and return it in the desired
position.
A Roll constructed on my improved method would thus have an internal coil or
worm like passage through its body or barrel, the ends of the pipe or pipes being
allowed to protude at each end of the barrel, either in radial lines to the axis or
parallel thereto, and in some cases the end of the pipe or pipes may be made to
extend to the ends of the Roll so as to form an orifice or orifices in line with
its axis.

page_text: When a roll has been thus cast with an internal coil or worm of pipe or pipes, and
whilst it is still hot or immediately before the casting is commenced, I connect one
end of such coil or worm with a blast pipe, and by driving a continuous current of
cold air through the same the roll is more uniformly and rapidly cooled and in a
chilled roll a portion of the interior of the body or barrel of the roll will be sufficiently
cooled to prevent a large part of the internal heat from the centre of the roll being
transmitted to the region of the chill, and in this way the chill is preserved to a greater
degree of hardness than would otherwise be the case.
The coil or worm having thus served the purpose of cooling the interior of the roll
it may likewise be utilised as a means for more uniformly and rapidly cooling the roll
when it has become unduly heated during use this being effected by allowing or
forcing a current of water to flow through.the coil in addition to the stream which is
sometimes allowed to flow over the external surfaces. In some cases air may be
employed as the cooling medium.
As a modification of the foregoing method of constructing rolls, in some cases as in
large rolls, two or more coils may be employed of different diameters, or several coils
of the same diameter may be employed after the manner of a worm with several threads
of the same pitch.
As a further modification when a dense chill is required without regard to the
subsequent softening during the cooling action, I dispense with the pipe or pipes and
current of cold air and use instead a solid coiled Bar or Bars cast in the barrel or body
of the Roll the presence of which would assist in striking the chill.
* Dated this 10th day of February 1889
R. HEBER RADFORD,
Agent for the Applicant.

page_text: Improvements in Chilled and other Rolls and in the Manufacture of
the same.
I JOSEPH BETTS BRADSHAW, of Handsworth Woodhouse, near Sheffield, in the
County of York, Iron Manufacturer, do hereby declare the nature of my said Invention
for "IMPROVEMENTS IN CHILLED AND OTHER ROLLS AND IN THE MANUFACTURE OF
THE SAME "and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
Although my Invention is more particularly applicable to chilled Rolls, it is likewise
applicable to Grain Rolls whether in Iron, Steel or other metal.
The objects of my Invention are twofold, first, to produce Rolls the chilled surfaces
of which shall be harder than is obtainable by the ordinary processes of manufacture,
and secondly, to provide the means by which Rolls may be more uniformly and rapidly
cooled.
I effect these objects by constructing each roll with an internal Coil of pipe or
pipes, cast in its body or barrel, concentric with and parallel to its axis, the bore
of the pipe and the diameter of the Coil being regulated by the size of the Roll.
The method by which the Coil of pipe or pipes would be cast within the body of
the roll would be somewhat similar to that employed for casting the Wrot Iron Coils
in Blast Furnace tuyeres, that is to say, the Coil would first be placed in the required
position within the chill or mould, and the molten metal would be afterwards
poured into the mould so as to surround the Coil and retain it in the desired
position.
A roll constructed on my improved method would thus have an internal Coil or
worm like passage or passages through its body or barrel, the ends of the pipe or.
pipes coming flush at each end of the barrel, either in radial lines to the axis or
parallel thereto, and in some cases the end of the pipe or pipes may be made to extend
to the ends of the Roll so as to form an orifice or orifices in line with its axis.
When a Roll has been thus cast with an internal coil or worm of pipe or pipes, and
whilst it is still hot or immediately before the casting is commenced, I connect one
end of such Coil or worm with a blast pipe, and by driving a. continuous current of
cold air through the same the Roll is more uniformly and rapidly cooled, and in a
chillod Roll a portion of the interior of the body or barrel of the Roll will be suffi-
ciently cooled to prevent a large part of the internal heat from the centre of the
Roll being transmitted to the region of the chill, and in this way the chill is preserved
to a greater degree of hardness than would otherwise be the case.
The coil or worm having thus served the purpose of cooling the interior of the Roll,
it may likewise be utilised as a means for more uniformly and rapidly cooling the
Roll when it has become unduly heated during use, this being effected by allowing or
forcing a current of water to flow through the Coil in addition to the stream which is
sometimes allowed to flow over the external surfaces. In some cases air may be
employed as the cooling medium.
As a modification of the foregoing method of constructing Rolls, in some cases as in
large Rolls, two or more Coils may be employed of different diameters, or several Coils
of the same diameter may be employed after the manner of a worm with several threads
of the same pitch.
As a further modification when a dense chill is required without regard to the
subsequent softening during the cooling action I dispense with the pipe or pipes and

page_text: current of cold air, and use instead a solid Coiled Bar or Bars cast in the barrel or
body of the Roll, the presence of which would assist in striking the chill.
The nature of my invention will be better understood on reference to the accompany-
ing sheet of drawings in which I have illustrated several methods of placing the Coil
or Coils within the body of the roll.
Figs. 1 and 2 represent a side and end view of a roll with an internal Coil or worm
of pipe or pipes (shewn in dotted lines) placed or cast within the body of the roll, the
ends of such pipe or pipes having their orifices at or near the ends of the barrel or
body of the roll in radial lines to its axis.
Figs. 3 and 4 represent a side and end view of a roll with an internal Coil or worm
of pipe or pipes (shewn in dotted lines) placed or cast within the body of the roll, the
ends of such pipe or pipes having their orifices at or near the ends of the barrel or
body of the roll parallel to its axis.
Figs. 5 and 6. represent a side end view of a roll with an internal Coil or worm
of pipe or pipes (shewn in dotted lines) placed or cast within the barrel or body of
the roll, the ends or orifices of such pipe or pipes extending to the ends of the roll in
line with its axis.
Figs. 7 and 8, represent a side and end view of a roll with an internal Coil or
worm of pipe or pipes (shewn in dotted lines) placed or cast within the barrel or body
of the roll, one end or orifice of such pipe or pipes extending to the end of the roll
in line with its axis as in Figs. 5 and 6 and the other end of such pipe or pipes having
its orifice or orificos at or near one end of the body or barrel of the roll in parallel
lines to its axis as in Figs. 3 and 4.
Figs. 9 and 10 represent a side and end view of a roll with a solid, coiled bar or bars,
(shewn in dotted lines) placed or cast in the body of the roll in lieu of the pipe or
pipes previously described.
The same letters refer to similar parts throughout the several views.
1,
is the roll.
b, is the internal coil or worm of pipo or pipes shewn in dotted lines in Figs. 1 to 8
inclusive.
c. c, are the orifices in the same.
d, is the solid coiled bar or bars shewn in dotted lines in Figs. 9 and 10.
From the above illustrations it will be seen that the methods herein illustrated may
be still further varied, for example the method shewn in Figs. 7 and 8 may be
applied to both ends of the roll by employing two separate Coils or worms, each such
Coil or worm baving one orifice at one end of the roll in line with its axis, and the
other orifice at or near the end of the body or barrel of the roll either parallel to or in
radial lines to the axis.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed I declare that what I
claim is
(1.) Constructing Rolls with an internal Coil or worm of pipe or pipes, or with
internal Coils or worms of pipes, for the purposes and in the manner substantially as
herein described and illustrated.
(2.) Constructing Rolls with an internal Coil of metallic bar or bars, or with internal
Coils of metallic bars for the purposes and in the manner substantially as herein
described and illustrated.
(3.) Improvements in Rolls for the purposes and in the manner substantially as
herein described and illustrated.
Di thi. 10451...
L
1000
R. HEBER RADFORD,
Agent for the Applicant.