IMPROVEMENTS IN MEANS OR APPARATUS FOR COATING SHEETS OR PLATES OF METAL."
Year: 1881

page_text: LETTERS PATENT to John Lysaght, of the City and County of Bristol, Iron
Manufacturer, for an Invention of "IMPROVEMENTS IN MEANS OR APPARATUS
FOR COATING SHEETS OR PLATES OF METAL."
"
PROVISIONAL SPECIFICATION left by the said John Lysaght at. the Office
of the Commissioners of Patents on the 30th March 1881.
JOHN LYSAGHT, of the City and County of Bristol, Iron Manufacturer.
IMPROVEMENTS IN MEANS OR APPARATUS FOR COATING SHEETS OR PLATES OF
METAL."
This Invention has for its object improvements in means or apparatus for coating
sheets or plates of metal.
For this purpose I cause the sheets or plates of metal which are to be coated to
be supplied in a uniformly heated state to a bath of coating metal, and also cause
the plates or sheets to travel through the bath of coating metal, and to be with-
drawn from it at one uniform rate. This I effect in the following manner:-I
employ a pair of rolls to continuously feed forward the sheets which are to be
coated over the top of a plate or frame which is heated by a furnace below it.
The sheets are by the rolls caused to move forward between guides which conduct
them over the heated plate or frame to a second pair of rolls situated above the
top of one end of a vessel containing the melted coating metal. The second pair
of rolls pass the sheets between a second pair of guides. These guides are within
the vessel containing the coating metal, and conduct the sheets through the coating
metal from one end of the vessel to the other, and deliver them upwards and out
of the metal at the other end of the vessel. The foremost ends of the sheets as
they issue from the metal are, by means of chains or otherwise, connected to a
pulley on a driving shaft which is above the vessel containing the coating metal,
and are by the action of this pulley drawn up vertically out of the vessel at the
same speed that the rollers feed it forward into the vessel.
By the above means the sheets or plates are carried forward with one constant,
regular, and uniform motion during the time that they are passing into and through
and out of the coating metal.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Lysaght in the Great Seal Patent Office on the 29th September
1881.
"
JOHN LYSAGHT, of the City and County of Bristol, Iron Manufacturer.
IMPROVEMENTS IN MEANS OR APPARATUS FOR COATING SHEETS OR PLATES OF
METAL."
This Invention has for its object improvements in means or apparatus for coating
sheets or plates of metal.
For this purpose I cause the sheets or plates of metal which are to be coated to
be supplied in a uniformly heated state to a bath of coating metal, and also cause
the plates or sheets to travel through the bath of coating metal, and to be with-
drawn from it at one uniform rate. This I effect in the following manner :-I
employ a pair of rolls to continuously feed forward the sheets which are to be
coated over the top of a plate or frame which is heated by a furnace below it.
The sheets are by the rolls caused to move forward between guides which conduct
them over the heated plate or frame to a second pair of rolls situated above the
top of one end of a vessel containing the melted coating metal. The second pair
of rolls pass the sheets between a second pair of guides. These guides are within
the vessel containing the coating metal, and conduct the sheets through the coating
metal from one end of the vessel to the other, and deliver them upwards and out
of the metal at the other end of the vessel. The foremost ends of the sheets as
they issue from the metal are, by means of tongs attached to a rope or otherwise,
connected to a pulley on a driving shaft which is above the vessel containing
the coating metal, and are by the action of this pulley drawn up vertically
out of the vessel at the same speed that the rollers feed it forward into the
vessel.
By the above means the sheets or plates are carried forward with one constant,
regular, and uniform motion during the time that they are passing into and through
and out of the coating metal.
In order that my Invention may be fully understood, I have in the Drawings
hereunto annexed shown apparatus constructed as above described.
Figure 1 is an end elevation of the apparatus; Figure is a plan view of the
same to show the relative positions of the working parts; Figure 3 is a vertical
section taken on the line o, o; and Figure 4 is a portion of the shafting from which
motion is conveyed to the several moving parts of the apparatus; this view shows
the position of the various driving pulleys.
A, A, is a pair of horizontal metal plates, the lower one of which is heated by a
furnace, as shown; B, B, are rolls by which the plates to be coated are caused to
pass between the plates A; C are guides by which the plates as they emerge from
between the plates A are conducted down to a pair of rolls D situated at one end
of the vessel E containing the melted coating metal; F, F, are curved guide bars by
which the plates which are being coated are conveyed from the rolls D through the
melted metal, and delivered from the metal at G at the opposite end of the vessel E.
One of the rolls B is driven at one end by a pulley H and endless band, and the
rolls at their opposite ends are geared together by toothed pinions. The rolls D
are similarly geared one with the other, and are driven by a band pulley at the
same speed as the rolls B. These band pulleys, and the corresponding band pulleys
on the driving shaft I, are all marked H. As the plates rise up at G from the
melted metal in the vessel E, they are taken hold of by tongs attached to a rope
that is led once around the drum K on the driving shaft I. The tongs grip the
sheets tight as soon as the cord is tightened, and as the drum K is of the same

page_text: diameter as the rolls B and D, the plates are drawn up out of the bath at the
same speed as they are passed into it. The vessel E is kept heated by fires ranged
around it, as shown.
Having thus described the nature of my Invention and the manner of performing
the same, I would have it understood that I do not confine myself to the precise
details shown in the Drawings, but I claim the combination of means or apparatus
for galvanizing or coating sheets or plates of metal, substantially as herein
described.
In witness whereof, I, the said John Lysaght, have hereunto set my hand
and seal, this Twenty eighth day of September, in the year of our Lord
One thousand eight hundred and eighty one.
JOHN LYSAGHT. (L.S.)