Improvements in the Production of Thin Metallic Sheets or Ribbons and in Apparatus therefor.
Year: 1897

page_text: Date of Application, 21st May, 1897
Complete Specification Left, 19th Feb., 1898-Accepted, 26th Mar., 1898
PROVISIONAL SPECIFICATION.
Improvements in the Production of Thin Metallic Sheets or Ribbons
and in Apparatus therefor.
I, WILLIAM HERBERT HYATT, of Percy House, Teddington, in the County of
Middlesex, Fellow of the Chemical Society of Great Britain, and Chemical
Engineer, do hereby declare the nature of this invention to be as follows;-
What is known as "leaf" lead is now commonly produced by pouring a stream
of molten lead onto a revolving copper drum partly immersed in a tank of water.
The apparatus at present employed is however very bulky, as a large mass of water
is necessary, and is very liable to get out of order as the endless bands employed
to convey the lead leaf from the tank are apt to get choked. Difficulty also is
caused by the lead solidifying in the feed trough. The use of such an
apparatus for metals having a higher melting point than lead is practically out
of the question as the evils above referred to would be greatly intensified although
in many chemical and other operations it would be very desirable to have other
metals in the form of leaf.
According to this invention I so modify the apparatus that it can be used not.
only for lead but for other metals also and this I do by cooling the metal by free
evaporation from its surface in the air instead of by conduction in water. For
this purpose I dispense with the water tank and direct jets of water against the
side of the copper drum thereby supplying a film of water to its surface and to that
of the leaf descending from it. At some distance below the drum is a trough
or floor from which the leaf is raked by a workman. In place also of trusting
only to its own heat to keep metal sufficiently fluid not to choke the holes in the
bottom of the feed trough I apply heat to the latter.
Dated this 21st dow of Mov 1807
Improvements in the Production of Thin Metallic Sheets or Ribbons
and in Apparatus therefor.
I, WILLIAM HERBERT HYATT, of Percy House, Teddington, in the County of
Middlesex, Fellow of the Chemical Society of Great Britain, and Chemical
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:-
What is known as "leaf" lead is now commonly produced by pouring a stream
of molten lead onto a revolving copper drum partly immersed in a tank of water,

page_text: The apparatus at present employed is however very bulky, as a large mass of water
is necessary, and is very liable to get out of order as the endless bands employed
to convey the lead leaf from the tank are apt to get choked. Difficulty also is
caused by the lead solidifying in the feed trough. The use of such an
apparatus for metals having a higher melting point than lead is practically out
of the question as the evils above referred to would be greatly intensified although
in many chemical and other operations it would be very desirable to have other
metals in the form of leaf.
According to this invention I so modify the apparatus that it can be used not
only for lead but for other metals also and this I do by cooling the metal by free
evaporation from its surface in the air instead of by conduction in water. For
this purpose I dispense with the water tank and direct jets of water against the
side of the copper drum thereby supplying a film of water to its surface and to that
of the leaf descending from it. At some distance below the drum is a trough
or floor from which the leaf is raked by a workman. In place also of trusting
only to its own heat to keep metal sufficiently fluid not to choke the holes in the
bottom of the feed trough I apply heat to the latter.
Figure 1 is a front elevation, and Figure 2 a vertical transverse section, of an
apparatus constructed according to this invention.
'
a is a revolving copper cylinder, and a trough perforated at its bottom and
containing molten metal. These parts are similar to those now in use.
pipes leading gas to the pipes d d which constitute multiple Bunsen burners.
a perforated water pipe. f is an incline for receiving the metal.
ce are
e is
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed I declare that what I
claim is:-
1. The combination with the trough and revolving cylinder of means for directing
jets of water against the latter substantially as described.
2. The method of and apparatus for producing sheets or ribbons of metal sub-
stantially as described and shown in the drawing.
Dated th: 10th day of Walumou 1800