IMPROVEMENTS IN ROLLING MILLS
Year: 1882

page_text: LETTERS PATENT to Chester Ammen Snow, of the City of Washington, in the
District of Columbia and United States of America Patent Solicitor, for an
Invention of "IMPROVEMENTS IN ROLLING MILLS " Communicated to him
by Cyrus B. Sill of Youngstown in the county of Mahoning and state of
Ohio, United States of America.
PROVISIONAL SPECIFICATION left by the said Chester Ammen Snow at
the Office of the Commissioners of Patents on the 10th July 1882.
CHESTER AMMEN SNOW of the city of Washington in the District of Columbia
and United States of America Patent Solicitor IMPROVEMENTS IN ROLLING
MILLS a communication to me from Cyrus, B, Sill of Youngstown in the County of
Mahoning and state of Ohio, United States of America
This invention relates to that class of rolling mills adapted for rolling, finishing
and reducing pipes, shafting and other cylindrical or tubular articles.
The principle of my invention consists in the arrangement upon or in a common
frame, of a set of two or more rolls arranged with their axes at an angle to each
other and to the axis of the article to be rolled whereby the said article receives
not only a rotary but also a progressive movement while passing between the
rolls so as to be in this manner reduced to the proper dimensions and to a true
cylindrical shape
These rolls are adjustably mounted in the supporting frame and are arranged
spirally as it were, around a central axis so that the axes of the several rolls shall
be in different planes and at an angle to said central axis which is that of the
article operated upon
These rolls may be cylindrical in form or they may have concave sides and this
is perhaps the most desirable form though I do not wish to limit myself thereto as
the said rolls may as stated be cylindrical or conical or they may have corrugations
formed upon their surfaces or in fact may have any suitable form.

page_text: . When the rolls are concave sided the lines of contact between the several rolls
are straight lines apparently wound around a central longitudinal axis to which a
rotary and progressive movement is imparted said central axis being the article
operated upon This movement imparted to the article gives it the true cylindrical
shape and at the same time feeds it forward through the rolls When operating
upon articles of limited diameter I preferably substitute for one of the rolls
(three being usually employed in the set) a fixed bar having two spiral sides or
faces to correspond with the faces of the rolls between which it is fitted.
This construction adapts the rolls for closer adjustment towards each other and
the bar the result of which is that even with large rolls an article of very amall
diameter may be operated upon
By means of this improved construction of rolling mill metal either hot or cold
may at a single operation, be rolled to a true cylindrical shape, and will require
less attendance occupy less space and be as durable as the more complicated rolling
mills now in general use.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Chester Ammen Snow in the Great Seal Patent Office on the
5th January 1883.
CHESTER AMMEN SNOW of the City of Washington in the district of Columbia
and United States of America Patent Solicitor. "IMPROVEMENTS IN ROLLING
MILLS." A communication to him by Cyrus. B. Sill of Youngstown in the
county of Mahoning and State of Ohio United States of America
"
This invention relates to rolling mills for rolling, finishing and reducing pipes
shafting and other cylindrical or tubular articles and it consists in certain
improvements in the construction of the same which will be hereinafter fully
described and particularly pointed out in the claim. The principle of my invention
consists in the arrangement to be hereinafter described, in a common frame of a
set of two or more rollers arranged with their axes at an angle to each other and
to the axis of the article to be rolled, whereby the said article receives not only a
rotary but also a progressive movement while passing between the rolls so as to be
in this manner reduced to the proper dimensions and to a true cylindrical shape. •
. In the accompanying drawings, figure 1 is an end view, figure 2, a top plan view
of my improved rolling mill. Figures 3 and 5 are vertical transverse sections,
Figure 4 is a side elevation and figure 6 a vertical longitudinal section of my
improved rolling mill. Figure 7 is a detail view of one of the rolls. Corresponding
parts in the several figures are denoted by like letters of reference.
In the drawings hereto annexed, A represents the frame of the machine, the
sides or housings of which B, B, are provided with seats C for the blocks
or boxes D in which the shafts E of the rolls F are journaled. The rolls F
of which in the drawings hereto annexed I have shown three, are arranged
spirally as it were, around a central longitudinal axis, so that the axes of the
several rolls shall be in different planes, and all at an angle to the said central
longitudinal axis, which is that of the article to be rolled. The rolls F may be
cylindrical in form, or they may as in the drawings have concave sides which is
perhaps the most desirable form. To this however I do not wish to limit myself,
as the said rolls may as stated be cylindrical; or they may be conical or of any
other suitable shape. I would also state that the faces of the said rolls may be
either plain and smooth or as in figure 7 of the drawings corrugated without
changing the spirit of my invention.
It will be found that when the rolls are concave sided as in figures 1, 2, 3, 4
& 6 the lines of contact between the several rolls are straight lines apparently
wound around a central longitudinal axis, which is the axis of the article to be
rolled. Thus when the said rolls revolve the said article receives a spiral or
combined rotary and progressive movement which results in forming it to the true
cylindrical shape which it is the object of this machine to impart and at the same
time feeding it forward through the rolls.
The rolls F may all be of the same size or of different sizes, as may be preferred.
The shafts of the rolls F are provided at one or either end with pinions G, to which
power for rotating the said rolls in the same direction may be connected. Such
power may be connected to said rolls separately or in pairs or all together. The
boxes D are made radially adjustable in their seats in the housings by means of
set screws H in order that the rolls may be adjusted so as to produce cylindrical
articles of different sizes.
When articles of a small diameter are to be rolled I prefer to substitute for one
of the rolls F a fixed bar I (shown in figure 5 of the drawings) and having two

page_text: spiral sides or faces J J to correspond with the faces of the adjoining rolls between
which it is fitted. This enables the rolls to be adjusted more closely together and
in close proximity to the said bar I, the result of which is that even with large
rolls a very small article, or one of a small diameter may be manipulated. From
the foregoing description, taken in connection with the drawings hereto annexed,
the operation and advantages of my invention will be readily understood. With
it metal may at a single operation be rolled either hot or cold to a true cylindrical
shape and to the desired size.
It is simple, convenient, durable and may be attended by fewer hands than the
more complicated rolling mills now generally used for producing cylindrical
articles
I am aware that rolling mills have been heretofore constructed with concave-
sided rolls arranged spirally around a longitudinal axis. I am also aware that
spirally-arranged rolls have been made adjustable at their ends and neither of
these constructions do I herein claim.
Having thus described my invention, I claim and desire to secure by Letters
Patent :-
The combination and arrangement as herein described of the housings BB
having seats C and set screws H, the radially-adjustable boxes D, the concave-sided
rolls F having shafts Ẹ mounted in said boxes, all said boxes being independently
adjustable, and the gear wheels G secured upon the ends of the shafts which project
beyond the housings as and for the purpose herein set forth.
In witness whereof I the said Chester Ammen Snow. have hereunto set
my hand and seal this twenty third day of December in the year of
our Lord, One thousand Eight hundred and Eighty two
CHESTER AMMEN SNOW (T.)
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