Improvements in Means for Hermetically Covering the Surface of Molten Metal or other Material in Tinning Pots, Galvanizing Baths, or other Vessels.
Year: 1891

page_text: Date of Application, 17th Dec., 1891
Complete Specification Left, 17th Oct., 1892-Accepted, 19th Nov., 1892
PROVISIONAL SPECIFICATION.
Improvements in Means for Hermetically Covering the Surface of
Molten Metal or other Material in Tinning Pots, Galvanizing
Baths, or other Vessels.
I, GEORGE HENRY WHITE of Lliw Forge Pontardulais near Swansea in the
County of Glamorgan Engineer do hereby declare the nature of this invention to
be as follows:-
My invention relates to improvements in means for hermetically covering the
surface of molten metal or other material in tinning pots galvanizing baths or other
vessels.
In the various processes of coating metal plates with metals or alloys the surface
of the molten metal by reason of exposure to the atmosphere speedily becomes
oxidized and coated with dross and unless the surface is frequently scraped and the
dross removed the coating deposited upon the metal plate is of inferior quality or
useless for purposes of trade and the frequent removal of the dross results in a loss
to the manufacturer.
Now the object of my invention is to hermetically cover the surface of the molten
metal in a simple and inexpensive manner and thus obviate the difficulty above
pointed out.
For this purpose I employ a lid or cover to fit loosely but closely upon the upper
edge of the bath or vessel and upon the under side of the lid or cover 1 form a
continuous flange of the shape of the bath or vessel and so as to fit the interior
thereof loosely but closely and I form this flange of such a depth that it will descend
into the molten metal a short distance.
By these means the entire surface of the molten metal with the exception of a
fine film thereof between the descending flange and the sides of the vessel will be
hermetically covered and efficiently protected from the action of the atmosphere.
Although I have described my invention in connection with vessels to be employed
in coating metals with metals I would have it understood that it is equally applicable
to vessels intended to contain materials liable to give off noxious fumes or deteriorate
by contact with the atmosphere.
Dated this 17th day of December 1891.
WHITE & WOODINGTON,
27, Southampton Buildings, London, Agents.
COMPLETE SPECIFICATION.
Improvements in Means for Hermetically Covering the Surface of
Molten Metal or other Material in Tinning Pots, Galvanizing
Baths, or other Vessels.
I GEORGE HENRY WHITE of Lliw Forge Pontardulais near Swansea in the
County of Glamorgan Engineer do hereby declare the nature of this invention
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
My invention relates to improvements in means for hermetically covering the
surface of molten metal or other material in tinning pots galvanizing baths or other
vessels.
In the various processes of coating metal plates with metals or alloys the surface
of the molten metal by reason of exposure to the atmosphere speedily becomes
oxidized and coated with dross and unless the surface is frequently scraped and the
Puin 17

page_text: dross removed the coating deposited upon the metal plate is of inferior quality or
useless for purposes of trade and the frequent removal of the dross results in a loss
to the manufacturer.
Now the object of my invention is to hermetically cover the surface of the molten
metal in a simple and inexpensive manner and thus obviate the difficulty above
pointed out.
For this purpose I employ a lid or cover to fit loosely but closely upon the upper
edge of the bath or vessel and upon the underside of the lid or cover I form a
continuous flange of the shape of the bath or vessel and so as to fit the interior
thereof loosely but closely and I form this flange of such a depth that it will descend
into the molten metal a short distance.
And in order that the said invention may be more clearly understood and readily
carried into effect I will proceed aided by the accompanying drawings more fully to
describe the same.
DESCRIPTION OF THE DRAWINGS.
Figure 1 is a vertical transverse section of a bath fitted with a cover according
to my invention and
Figure 2 is a horizontal section taken on the line 1-1 of Figure 1.
a represents a bath or vessel which is assumed to contain molten metal and
b represents a lid or cover which fits loosely but closely upon the upper edge or rim
of the bath or vessel a.
Upon the underside of the lid or cover 1 form a continuous descending flange
of the shape of the bath or vessel a and so as to fit the interior thereof loosely but
closely and I form this descending flange of such a depth that it will descend into
the molten metal a short distance as indicated in Figure 1.
By these means the entire surface of the molten metal with the exception of a
fine film thereof between the descending flange and the sides of the vessel a will
be hermetically covered, and efficiently protected from the action of the atmo-
sphere.
It will be understood that in cases where projecting parts of machinery or the
like interfere with the continuity of the cover an opening is formed at that point
surrounded by suitable descending flanges b.
Although I have described my invention in connection with vessels to be employed
in coating metals, I would have it understood that it is equally applicable to vessels
intended to contain materials liable to give off noxious fumes or deteriorate by
exposure to the atmosphere.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what 1
claim is :-
In combination with a tinning pot or other vessel a lid formed to loosely but
closely fit upon the top edge of the vessel and provided with a descending flange
loosely but closely fitting the sides of the vessel and adapted to enter the contents
thereof substantially as herein shown and described and for the purpose stated.
Dated this 17th day of October 1892.
WHITE & WOODINGTON,
27, Southampton Buildings, London, Agents.