IMPROVE- MENTS IN APPARATUS OR MACHINERY TO BE EMPLOYED IN ROLLING METALS
Year: 1873

page_text: LETTERS PATENT to Carl Johan Laurentz Leffler, of Sheffield, in the
County of York, Iron Merchant, for the Invention of "IMPROVE-
MENTS IN APPARATUS OR MACHINERY TO BE EMPLOYED IN ROLLING METALS."
PROVISIONAL SPECIFICATION left by the said Carl Johan Laurentz
Leffler at the Office of the Commissioners of Patents, with his
Petition, on the 81st July 1878.
I, CARL JOHAN LAURENTZ LEFFLER, of Sheffield, in the County of
York, Iron Merchant, do hereby declare the nature of the said Invention
for "IMPROVEMENTS IN APPARATUS OR MACHINERY TO BE EMPLOYED IN ROLLING
METALS," to be as follows:-
This Invention, relating to improved apparatus or machinery to be
used in rolling metals, consists in constructing the roller (or roll or rolls)
of a rolling mill or machinery for rolling metals with a number of pro-
jections arranged across the circumference, or otherwise conveniently
arranged in or on the outside surface of the roller or roll, the object in

page_text: providing such projections, (made either sharp or not and of any desired
shape) being to make indentations or grooves in the bars or other articles
whilst undergoing the operation of rolling, so that the bars or other
articles may be broken off into pieces when cold at the parts where the
indentations or grooves have been made, or to enable the bars or articles
to be cut into suitably sized pieces or portions during the operation of
providing such projections, (made either sharp or not and of any desired
shape) being to make indentations or grooves in the bars or other articles
whilst undergoing the operation of rolling, so that the bars or other
articles may be broken off into pieces when cold at the parts where the
indentations or grooves have been made, or to enable the bars or articles
to be cut into suitably sized pieces or portions during the operation of
rolling.
.
The projections may be made separately from the roller or roll, and
either of the same metal as the roll or of any other suitable hard metal;
and when made separately they will be wedged in or securely fastened
on to the roller.
SPECIFICATION in pursuance of the conditio
filed by the said Carl Johan Laurentz Leffler in the Great Seal
Patent Office on the 30th January 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CARL JOHAN ]
LAURENTZ LEFFLER, of Sheffield, in the County of York, Iron Merchant,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Thirty-first day of July, in the year
of our Lord One thousand eight hundred and seventy-three, in the 2
thirty-seventh year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Carl Johan Laurentz Leffler,
Her special licence that I, the said Carl Johan Laurentz Leffler, my
executors, administrators, and assigns, or such others as I, the said
Carl Johan Laurentz Leffler, my executors, administrators, and assigns 2
should at any time agree with, and no others, from time to time and at
all times thereafter during the term therein expressed, should and
lawfully might make, use, exercise, and vend, within the United
Kingdom of Great Britain and Ireland, the Channel Islands, and
Isle of Man, an Invention for "IMPROVEMENTS IN APPARATUS OR MACHINERY:
TO BE EMPLOYED IN ROLLING METALS," upon the condition (amongst others)
that I, the said Carl Johan Laurentz Leffler, my executors or admini-
strators, by an instrument in writing under my, or their, or one of their
hands and seals, should particularly describe and ascertain the nature of

page_text: the said Invention, and in what manner the same was to be performed,
and cause the same to be filed in the Great Seal Patent Office within
six calendar months next and immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said Carl Johan Laurentz Leffler, do
hereby declare the nature of the said Invention, and in what manner
the same is to be performed, to be particularly described and ascertained
in and by the following statement in writing, and on reference being
had to the accompanying Drawings, that is to say :-
This Invention consists in the application to machinery or apparatus
for rolling metals of certain improved means for making cuts, indenta-
tions, or grooves in bars or other metal articles whilst undergoing the
-process or operation of rolling, so that they may by such means be out,
or separated, or made capable of being readily broken off into pieces
when cold at the parts where the indentations or grooves have been
made.
▸
In carrying my Invention into effect I form or provide the circum-
ference of the roller (or roll or rolls) 1 of the rolling machinery or
apparatus with projections or ribs 2, which I prefer to arrange helically
after the form or manner of a worm across the circumference of the
roller or roll (as illustrated in Figures 1 and 2 of the accompanying
Drawings); or I form or arrange the projections in any other suitable
manner across the circumference of the roller or roll; or I form the
projections 2 separately from the Coller 1, and I wedge or otherwise
securely fasten them in dovetailed grooves or recesses therein.
The projections 2 may be made either of the same metal as the roller 1
or of any other suitable hard metal, and of any desired form or shape,
with their cutting, indenting, or grooving edges either sharp or not, as
may be required, the latter modifications depending upon the effect
desired to be produced.
Having now described the nature and object of my said Invention for
"Improvements in Apparatus or Machinery to be Employed in Rolling
Metals," together with the manner in which the same is to be or may
be performed or carried into practical effect, I have to state in conclusion
that I claim as my Invention, the application to the roller (or roll or
rolls) of machinery or apparatus for rolling metals (and the use sub-

page_text: stantially as described) of projections, by preference arranged helically
after the manner or form of a worm, or in any other suitable manner,
across the roller's circumference, for making cuts, indentations, or
grooves in bars or other metal articles whilst undergoing the process or
operation of rolling, in order that they may be cut, or separated, or
made capable of being readily broken off into pieces when cold at the
parts where the indentations or grooves have been made.
In witness whereof, I, the said Carl Johan Laurentz Leffler, have
hereunto set my hand and seal, this Eighth day of January, in
the year of our Lord One thousand eight hundred and seventy-
four.