IMPROVEMENTS IN THE MANUFACTURE OF BEARINGS FOR ROLLS IN ROLLING MILLS OR OTHER SIMILAR MACHINERY
Year: 1878

page_text: LETTERS PATENT to John David Grey, of Aberavon, in the County of
Glamorgan, for the Invention of "IMPROVEMENTS IN THE MANUFACTURE OF
BEARINGS FOR ROLLS IN ROLLING MILLS OR OTHER SIMILAR MACHINERY,"
Sealed the 8th October 1878, and dated the 15th April 1878.
PROVISIONAL SPECIFICATION left by the said John David Grey at the
Office of the Commissioners of Patents on the 15th April 1878.
JOHN DAVID GREY, of Aberavon, in the County of Glamorgan. "IMPROVEMENTS
IN THE MANUFACTURE OF BEARINGS FOR ROLLS IN ROLLING MILLS OR OTHER
SIMILAR MACHINERY.”
The objects of this Invention, which relates to insprovements in the manufacture
of bearings for the rolls of rolling mills in which iron or other metals or materials
are rolled, are to manufacture the same of less expensive materials and in a more
simple method than hitherto, and to render the bearings more durable and not so
liable to get out of line or parallelism with each other as they are now.
The bearings which are generally used for the above referred to purpose are
made of brass (either compounded of a mixture of copper and tin or of copper and
zinc), which is a very expensive composition and very liable to quickly wear and
cause the rolls to get out of truth.
According to my improved manufacture I firstly make a casting of iron, having
a hollow of a greater radius than that of the roll shaft, but intended to be concentric
therewith, and provided on each side with a ledge or inner projection. I then place
this casting at a suitable distance from but concentric with the neck of the roll or
another shaft of the same size or diameter, and fill the hollow or space between the
cast-iron piece and the shaft or roll with molten spelter, which is retained in
position by the said ledges or inner projections and runs to the exact size and shape
of the neck of the roll, and dispenses with the trouble and expense of the usual

page_text: practice of running the rolls for the purpose of wearing the brasses to the shape of
the necks thereof; or, in lieu of pouring molten spelter into the hollow of the iron
casting, I can pour a composition of spelter and tin or of spelter and antimony;
or I can dispense with the cast-iron piece altogether, and use only a casting of
spelter or of antimony; but I prefer the combined use of the iron casting and the 5
inner casting or lining of spelter, as previously described.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John David Grey in the Great Seal Patent Office on the 15th
October 1878.
•
JOHN DAVID GREY, of Aberavon, in the County of Glamorgan.
"IMPROVEMENTS
IN THE MANUFACTURE OF BEARINGS FOR ROLLS IN ROLLING MILLS OR OTHER
SIMILAR MACHINERY."
The objects of this Invention, which relates to improvements in the manufacture
of bearings for the rolls of mills in which iron and other metals or substances are
rolled or of bearings for other machinery, are to manufacture the same of less
expensive materials and in a more simple method than hitherto, and to render the
bearings more durable, and not so liable to get heated or out of line or parallelism
with each other as they are now.
1
The bearings which are generally used for the above referred to purposes are
imade of brass (either compounded of a mixture of copper and tin or of copper and
zinc), which is a very expensive composition and very liable to quickly wear and
cause the rolls to get out of truth.
According to my Invention, which is illustrated on the accompanying Sheet of
Drawings in Figures 1 and 2, which respectively represent a sectional elevation
through the line a-b, and a plan view of my improved bearings, I firstly make a
casting 1 of iron (or other metal), having a hollow 2 of a greater radius than that
of the roll shaft 3 but intended to be concentric therewith and provided with inner
projecting ledges 4, and this casting I place at a suitable distance from but con-
centric with the neck or shaft of the roll (or another shaft of the same size or
diameter), and fill the hollow or space 5 between the casting 1 and the shaft 3 with
molten spelter, which is retained in position by the inner projecting ledges 4 and
runs to the exact size and shape of the neck of the roll, and dispenses with the
trouble and expense of the usual practice of running the rolls or machinery for the
purpose of wearing the brasses to the shape of the necks thereof; or, in lieu of
pouring molten spelter into the hollow of the casting 1, I can use a composition of
spelter and tin or of spelter and antimony; or I can dispense with the casting 1
altogether and use only a casting of spelter, or of antimony, or of a composition of
both; but I prefer the combined use of the casting 1 together with the inner
casting or lining 5 of speltor, as proviously described.

page_text: Having now described the nature and objects of my said Invention, together
with the manner in which the same is to be or may be performed or carried into
practical effect, I would remark in conclusion that I claim as my Invention, the
above described improvements in the manufacture of bearings for rolling mills and
other machinery, substantially as described and as illustrated on the accompanying
Sheet of Drawings, whereby the manufacture or production of such bearings is
simplified and rendered less expensive, and the bearings are made more durable
than and not so liable to get heated or out of line or parallelism with each other
as they are as hitherto manufactured.
In witness whereof, I, the said John David Grey, have hereunto set my hand
and seal, this Twelfth day of October, in the year of our Lord One
thousand eight hundred and seventy-eight.
JOHN DAVID GREY. (L.S.)