Im- PROVEMENTS IN APPARATUS EMPLOYED IN THE MANUFACTURE OF TIN AND TERNE PLATES
Year: 1873

page_text: LETTERS PATENT to Danicl Edwards, of Morriston, Swansea, in thic
County of Glamorgan, Manufacturer, for the Invention of "Im-
PROVEMENTS IN APPARATUS EMPLOYED IN THE MANUFACTURE OF TIN AND
TERNE PLATES."
Scaled the 29th May 1874, and dated the 16th December 1873.
PROVISIONAL SPECIFICATION left by the said Daniel Edwards at
the Office of the Commissioners of Patents, with his Petition, on
the 16th December 1873.
I, DANIEL EDWARDS, of Morriston, Swansea, in the County of
Glamorgan, Manufacturer, do hereby declare the nature of the said
Invention for "IMPROVEMENTS IN APPARATUS EMPLOYED IN THE MANUFACTURE
OF TIN AND TERNE PLATES," to bo
as follows:-
The object of the Invention is to effect economy in tinning plates of
iron in the manufacture of tin and terne plates.
Heretofore the pots in which the molten fluid used in tinning is held
are for the most part of about the same width at their upper as at their

page_text: lower surface, by which a large surface of molten metal is exposed to
injurious atmospheric action.
The object of the improvements is to remedy this evil by forming the
upper portion of the pot much narrower than the bottom of it, or so
as to greatly reduce the surface of hot metal exposed to atmospheric
action. Thus in place of, say one hundred or hundred and fifty plates
being in the metal at once by the reduction of the width of it only say
twenty to twenty-five will be capable of being acted upon at the same
time, and in consequence the plates are more quickly worked and
better finished, whilst economy of the metal used in the tinning process
and of the fuel used in the heating of that metal will be effected.
Ribs down each side of the pot serve to steady the plates and keep
the plates from touching the sides of the pot, besides aiding the men
in the better use of their tinning tongs; they also strengthen the pot
very materially. A slide may be used to work different sized plates.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Daniel Edwards in the Great Scal Patent Office
on the 15th June 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, DANIEL
EDWARDS, of Morriston, Swansca, in the County of Glamorgan, Manu.
facturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent bearing date the Sixteenth day of December, in the
year of our Lord One thousand eight hundred and seventy-three, in the
thirty-seventh year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto me, the said Daniel Edwards, Her special
license that I, the said Daniel Edwards, my executors, administrators,
and assigns, or such others as I, the said Daniel Edwards, my 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, tho
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS IN

page_text: APPARATUS EMPLOYED IN THE MANUFACTURE OF TIN AND TERNE PLATES," upon
the condition (amongst others) that I, the said Daniel Edwards, my
exccutors or administrators, by an instrument in writing under my,
or their, or one of their hands and scals, should particularly describe
and ascertain the nature of tho said Invention, and in what manner
the same was to be performed, and cause the same to be filed in the
Great Scal Patent Offico within six calendar months next and immc-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said Daniel Edwards, 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 thereof, that is to say :-
-
The object of the Invention is to effect economy in tinning plates of
iron in the manufacture of tin and terno plates.
Heretofore the pots in which the molten fluid used in tinning is held
are for the most part of about the same width at their upper as at their
lower surfaces, and such upper surface is fully open, by which a largo
surface of molten metal is exposed to injurious atmospheric action.
The object of the improvements is to remedy this evil by forming
the upper portion of the pot, or that open to the atmosphere much
narrower than the bottom of it, or with covers or enclosures, so as to
greatly reduce the surface of hot metal exposed to atmospheric action,
and to reduce the space for plates, so that the number of plates under
operation at any one time may be lessened. Thus in place of, say one
hundred or one hundred and fifty plates being in the metal at once,
by the reduction of the width of space allowed for such plates, say
twenty to twenty-five, may be the number capable of being acted upon
at the same time; and in consequence the plates are more quickly
worked and better finished, whilst economy of the metal used in the
tinning process, and of the fuel used in the heating of that metal, will
be effected.

page_text: But that the Invention may be more fully understood I will by the
aid of the accompanying Drawings proceed to describe more in detail
monne nurqued by me in carrying the same into effect.
DESCRIPTION OF THE DRAWINGS.
Figure 1 shows by a plan view, Figure 2 by a longitudinal section,
and Figure 3 by a transverse section, an arrangement of pot according
to my Invention. In each of the views the same letters indicate
corresponding parts.
a, a, indicate the outer walls or body of the pot; b, b, portions
thereof, forming covers or enclosures to a portion of the molten metal
bencath them; and c, c, are inner walls, having ribs c', c', thereto, by
which the extent of arca d to receive the plates to be coated is con-
siderably reduced; c³ are openings in the inner walls c; and b¹ are
other openings in the covering portions b, b, to allow of the escape of
air or gas from the upper portion of the chambers e, e, formed between
the outer walls a and the inner walls c, and thereby prevent any
tendency to explosion of the gases generated at such parts.
The ribs c¹ serve to prevent the plates whilst they are being coated
from touching the sides of the walls c, and also to facilitate the passage
of the tongs by the operators in removing the plates after they have
been coated.
Figure 4 shows a plan view of a modification of the above, with the
cover removed; Figure 5 shows a transverse section of Figure 4, with
the cover applied; and Figure 6 shows by plan view and section the
cover of Figures 4 and 5 separately. In this case the ribs c¹ are cast
with the body a of the pot, and they extend towards the centre of the
pot to the extent to which it may be desired to reduce the area thereof
for plates at d. The cover 6 in this case is formed separately, and is
applied by screws or pegs passed through openings in the cover
into corresponding openings c³ in the pot, or the cover may be otherwise
fixed in position; 63 is the opening in the cover for the passage of the
plates into and from the chamber d.
Figures 7, 8, and 9, show similar views to the last of another modi-
fication of the apparatus, with the ribs c¹ of greater extent on one side
of the pot than on the other; and the opening in the cover for the

page_text: passage through it of the plates to be coated correspondingly on one
side.
Figure 10 shows a plan view of another pot, with the cover removed;
Figure 11, a transverse section thereof, with its cover; and Figure 12
an under side view of the cover separately, showing another modi-
fication, in which the ribs c¹ arc cast on separate picces c', and the body
a of the pot is formed with or has applied to it projections a¹, a², to
serve as guides for the passage of the parts c' for the purpose of holding
them and the ribs c³ correctly in position in the pot a. the cover bis
applied by screws or otherwise, as may be desired. By these means I
am enabled greatly to reduce the space for the plates in the pots and
yet retain sufficient arca for the molten metal, to be readily kept at the
desired equable temperature, whilst by the surface of such metal being
protected from the direct action of the atmosphere incrustation and other
injurious effects on it are avoided.
It will be observed that various modifications of these arrangements
may be adopted, and the ribs c² may be formed simply as rods or pillars,
applied in the positions desired.
Having thus described my Invention, and means which I adopt in
carrying the same into effect, I would have it understood that I do not
confine myself to the precise arrangements of parts as shown and
described, as the same may be varied without departing from the
peculiar character of the Invention; but what I do claim is the
arranging or combining parts of pots or apparatus employed in the
manufacture of tin or terne plates, whereby the extent of surface of
the molten metal used in coating such plates exposed to the action of
the atmosphere is reduced, as is also the number of plates at one time
under operation; and the plates are held by ribs, bars, or projections,
so as to facilitate the operation of the workman in the use of his tinning
tongs, substantially as described.
In witness whereof, I, the said Daniel Edwards, have hercunto set
my hand and seal, this Ninth day of June, in the year of our
Lord One thousand eight hundred and seventy-four.