IMPROVEMENTS IN ROLLS FOR ROLLING MILLS
Year: 1882

page_text: LETTERS PATENT to Joseph Tinn of the City of Bristol for an invention of
IMPROVEMENTS IN ROLLS FOR ROLLING MILLS Communicated to him from
abroad by William E. Harris, of the City of St Louis in the State of Missouri
in the United States of America and Edwin B. Evans, of Covington in the
County of Kenton and State of Kentucky in the United States of America
PROVISIONAL SPECIFICATION left by the said Joseph Tinn at the Office of
the Commissioners of Patents on the 9th June 1882.
JOSEPH TINN of the City of Bristol
"IMPROVEMENTS IN ROLLS FOR ROLLING-
MILLS (a communication to me from abroad by William E Harris of the City of
St Louis in the State of Missouri in the United States of America and Edwin
B Evans of Covington in the County of Kenton and State of Kentucky in the
United States of America)
This invention which relates to Improvements in Rolls for rolling-mills has for
its objects to render the journals or ends of the rolls upon which the rolls are
carried more durable and less liable to be cut or grooved when revolving. It
consists in casting the journals in a chill or metal mould instead of as heretofore in
sand moulds and by thus hardening the bearing surface of the journals in pre-
venting variation in the thickness of the same plates bars and other rolled articles
arising from the inability of the journals of the rolls as heretofore constructed to
resist the cutting action of metal scale dirt or other substances which may get into
the bearings and which by abrasing and destroying the journals and bearings have
the effect of throwing the rolls out of adjustment and inducing irregularity in
working. After being cast the journals are turned concentrically with the body of
the roll and are subsequently preferably polished to a true working surface
Under this invention the cutting action above described is obviated the rolls are .
less liable to get out of adjustment friction is reduced less lubrication is required
and the quality of the articles rolled is rendered more uniform in regard to their
thickness.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Joseph Tinn in the Great Seal Patent Office on the 8th December
1882.
JOSEPH TINN, of the City of Bristol, IMPROVEMENTS IN ROLLS FOR ROLLING
MILLS (a communication to me from abroad by William E. Harris of the City of
St. Louis in the State of Missouri in the United States of America, and Edwin
B. Evans of Covington, in the County of Kenton, and State of Kentucky, in the
United States of America)
This invention which relates to improvements in rolls for rolling-mills, has for
its objects to render the journals or ends of the rolls upon which the rolls are
carried more durable and less liable to be cut or grooved when revolving.
It consists in casting the journals in a chill or metal mould instead of, as here-
tofore, in sand moulds, and, by thus hardening the bearing surface of the journals,
in preventing variation in the thickness of the same plates bars and other rolled
articles arising from the inability of the journals of the rollers to resist the cutting
action of metal scale, dirt or other substances which may get into the bearings and
which, by abrasing and destroying the journals and bearings, have the effect of
throwing the rolls out of adjustment and inducing irregularity in working.
After being cast, the journals are turned concentrically with the body of the roll,
and are subsequently preferably polished to a true working surface.
And in order that the said Invention may be properly understood, I now proceed
more particularly to set forth, by reference to the accompanying sheet of Drawings
and to the figures and letters marked thereon the mode or manner in which the
same may be used or practically carried into effect.
At Fig. 1 on the accompanying sheet of Drawings is represented a front elevation
of an ordinary roll for rolling metal sheets or plates but having the journals chilled
in accordance with this Invention. Fig. 3 is an end view of the same
The bearings or journals A. A. by which the roll is supported in place in the
mill and upon which it revolves, are formed with hardened chilled surfaces by
being cast in metal moulds under the well known system of producing chilled
castings. The hardened coatings thus produced on the journals A A are indicated
by the dotted lines a a and may vary in depth and degree in different rolls as may
be desired.
The journals are subsequently turned to an even surface concentrically with the
body B of the roll, which may, if desired be also chilled as commonly obtains.
CC are coupling necks for connecting the roll in a train in the usual manner.
The chilled surfaces a a of the journals A A offer an increased resistance to the
cutting or abrasing action exerted upon them by metal scale, dirt or other substances
which may get into the bearings, the effect of such cutting action being detrimental
to the proper adjustment and notion of the roll in the same plane necessary to
produce a sheet or plate of even thickness, besides increasing friction between the
journal and its bearing.
The necessity on this account of removing the roll to return the journals and
' repair the bearings is therefore rendered of less frequent occurence than obtains
with unchilled journals, while less power is expended in driving the rolls and a
saving of lubricants is effected.
Figs. 2 and 4 represent a front view and an end view respectively of a roll for
rolling bars or rails and having the journals A A cast with a chilled surface a a
similar to that hereinbefore described with reference to Figs. 1 and 3.
Having now described and particularly ascertained the nature of the said

page_text: Invention, and the mode or manner in which the same may be used or practically
carried into effect, I claim as the Invention secured to me by the herein before in
part recited Letters Patent.
The chilling of the bearing surfaces of the journals of rolls for rolling-mills to
the desired depth and degree as and for the purposes hereinbefore described.
In witness whereof I the said Joseph Tinn have hereunto set my hand
and seal this seventh day of December in the year of our Lord, one
thousand eight hundred and eighty two.