IMPROVEMENTS IN APPARATUS FOR THE MANUFACTURE OF TIN PLATES
Year: 1856

page_text: LETTERS PATENT to James Nasmyth, of Patricroft, in the County of
Lancaster, Engineer, and James Brown, of Newport, in the County of
Monmouth, Tin Plate Manufacturer, for the Invention of "IMPROVEMENTS
PROVISIONAL SPECIFICATION left by the said James Nasmyth and James
Brown at the Oflice of the Commissioners of Patents, with their Petition,
on the 2nd June 1856.
We, JAMES NASMYTH, of Patricroft, in the County of Lancaster, Engineer,
and JAMES BROWN, of Newport, in the County of Monmouth, Tin Plate Manu-
facturer, do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN APPARATUS FOR THE MANUFACTURE OF TIN PLATES," to be as follows:-
Our improvements in apparatus for the manufacture of tin plates consist in
driving the rolls through which the plates are passed at different surface
speeds; or, in the employment of rolls of different diameters driven at the
samo speed, whereby the plates are smoothed, and the burnishing and
planishing thereof effected, before or after being tinned, or both before and
after being timed.
Another of our improvements consists in imparting to the rolls through

page_text: which the plates are passed a reciprocating or to-and-fro motion to one or both
of the rolls in the direction of the axes thereof. When both rolls are made to
reciprocate, we cause them to move to and fro in a contrary direction to one
another
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said James Nasmyth and James Brown in the Great Seal Patent
Office on the 2nd December 1856.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we JAMES
NASMYTH, of Patricroft, in the County of Lancaster, Engineer, and JAMES
BROWN, of Newport, in the County of Monmouth, Tin Plate Manufacturer,
send greeting.
WHEREAS IIer most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Second day of June, in the year of our Lord One
thousand eight hundred and fifty-six, in the nineteenth year of Her reign.
did, for Herself. Her heirs and successors, give and grant unto us, the said
James Nasmyth and James Brown, Ier special licence that we, the said
James Nasmyth and James Brown, our exccutors, administrators, and assigns,
or such others as we, the said James Nasmyth and James Brown, our
executors, administrators, and assigns, 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 FOR THE MANU-
PACTURE OF TIN PLATES," upon the condition (amongst others) that we, the
said James Nasmyth and James Brown, or one of us, our executors or
administrators, by an instrument in writing under our, or their or one of our
or their hands and seals, should particularly describe and ascertain the nature
of 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 we, the said James Nasmyth and James Brown,
do hereby declare the nature of our said Invention, and in what manner the
same is to be performed, to be particularly described and ascertained in and
by the following statement, reference being had to the Drawings annexcd,
that is to say :-

page_text: Our improvements in apparatus for the manufacture of tin plates consist
in driving the rolls through which the plates are passed at different surface
speeds; or, in the employment of rolls of different diameters driven at the same
speed, whereby the plates are smoothed, and the burnishing and planishing
thereof effected before or after being tinned, or both before and after being
tinned.
Another of our improvements consists in imparting to the rolls through
which the plates are passed a reciprocating or to-and-fro motion to one or
both of the rolls in the direction of tho axes thereof. When both rolls are
made to reciprocate we cause them to move to and fro in a contrary direction
to one another.
The manner in which we carry our Invention into effect is exemplified in
the Drawings annexed, of which Figure 1 is a sectional end view of a pair of
planishing rolls arranged in accordance with our system of different surface
speeds. The difference of speeds is obtained by the employment of a pair of
rolls A, B, whose diameters are equal, but whose respective velocity of rotation
is different, such difference being induced by having the wheels C and D which
are fastened to the ends of the rolls A, B, made of different diameters, so that
the pinions E and F, which revolve at the same rate shall convey to the rolls
A and B different rates of revolution.
Figure 2 represents another of our arrangements of rolls and gearing. In
this case the different surface speed of the rolls is obtained by the employment
of a pair of rolls driven at the same or nearly the same relative rate of rotation,
while the desired difference of surface speed is obtained by making one of the
pair of rolls of greater diameter than the other. The result in this case is
similar to that produced by the arrangement described in regard to Figure 1.
Figure 3 represents, in front elevation, another of our improvements in the
apparatus employed in the manufacture of tin plates. It consists in inducing
a certain degree of end-way motion to one or other of the pair or set of rolls,
between which metal plates are passed, for the purpose of smoothing them
previous or subsequent to their being tinned. The object of such end-way
motion being to perfect the polishing action of the rolls by the aid of the slight
shuffing motion induced, which tends to obliterate any scratches or other
blemish in their surfaces.
One of the modes whereby we effect the end-way movement of one or other
of the pair or set of rolls consists in giving to each end of the roll B a certain
degree of skew or alternate diagonal inclined surfaces M, N, so that during its
rotation the rubbing blocks O and P may induce the required degree of end-way
motion, for the purpose and objects described.

page_text: These means, last described, may be varied at the will of the roll-maker, so
long as the end-way movement is obtained and employed for the purpose in
question.
And having now described the nature of our said Invention, and in what
manner the same is to be performed, we declare we do not confine ourselves to
the precise arrangements indicated in the Drawings; but we claim,-
First, the smoothing, burnishing, and polishing of metal plates before or
after being tinned, by imparting different surface speeds to the rolls through
or between which they are passed.
And, second, the imparting to one or both of the rolls through which the
plates are passed an end-way or to-and-fro motion in the direction of their
length.
In witness whereof, I, the said James Nasmyth, for myself and on
behalf of the said James Brown, have hereunto set my hand and seal,
this Twenty-seventh day of November, One thousand eight hundred
and fifty-six.