IMPROVEMENTS IN APPARATUS EMPLOYED IN CONNECTION WITH THE COATING OF METALS
Year: 1868

page_text: LETTERS PATENT to George Nurse, late of Pontymister, in the
County of Monmouth, but now of Dortmund, Westphalia, Prussia,
for the Invention of "IMPROVEMENTS IN APPARATUS EMPLOYED IN
CONNECTION WITH THE COATING OF METALS."
Sealed the 20th April 1869, and dated the 24th October 1868.
PROVISIONAL SPECIFICATION left by the said George Nurse at the
Office of the Commissioners of Patents, with his Petition, on the
24th October 1868.
I, GEORGE NURSE, late of Pontymister, in the County of Monmouth,
but now of Dortmund, Westphalia, Prussia, do hereby declare the
nature of the said Invention for "IMPROVEMENTS IN APPARATUS EMPLOYED
IN CONNECTION WITH THE COATING OF METALS," to be as follows:-
This Invention relates to the apparatus or hot-air chambers now
generally employed in substitution for grease or grease pots in the
finishing process in coating iron or other metals with tin or other metal
or alloy.
The Invention consists in constructing the apparatus in the form of
a circular pot with a hollow centre or otherwise, and with a frame or turn.

page_text: table caused to rotate in the circular hot-air chamber. This frame may
consist of rings formed with studs or projections to support removable
partitions, between which the coated plates are placed, the rings
being held by radial arms carried out from a central support. The cover
of the hot chamber is provided with a slot opening by which the coated
plates are inserted or withdrawn. The rotation of the frame is produced
by a hand wheel or otherwise, and as cach plate in succession reaches
the slot opening it may be taken out and a fresh one inserted. The
drippings from the plates fall upon a bonnet, from which they run into
an annular space between the outside of the chamber and a circular
flange or fillet on which the bonnet rests; the drippings may be tapped
off when necessary by spouts at different heights.
This Invention also provides that between the cover of the hot
chamber and an upper cover flues are formed, through which heat from
one or more fires circulates, thereby producing an uniform temperature
in the chamber. The brickwork supporting the chamber is situated
under the annular space before referred to, so that the metal therein is
removed from direct action of the fires, and therefore preserved from
oxidation. Holes may be made in the bottom of the chamber and in
the central support of the frame to admit heated gases to the chamber;
the chamber may be heated by gas or from fires.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said George Nurse in the Great Seal Patent Office.
on the 24th April 1869.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
NURSE, late of Pontymister, in the County of Monmouth, but now of
Dortmund, Westphalia, Prussia, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-fourth day of October, in the
year of our Lord One thousand eight hundred and sixty-eight, in the
thirty-second year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto me, the said George Nurse, Her special
licence that I, the said George Nurse, my executors, administrators, and
assigns, or such others as I, the said George Nurse, my executors,

page_text: 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 EMPLOYED IN CONNECTION WITH THE COATING OF METALS," upon
the condition (amongst others) that the said George Nurse, my
executors or administrators, by an instrument in writing under my,
or their, or one of 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 Scal Patent Office within six calendar months next and imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said George Nurse, do hereby declare
the nature of my 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, reference being had to the Drawings,
hereunto annexed, that is to say :-
This Invention relates to the apparatus or hot-air chambers now
generally employed in substitution for grease or grease pots in the
finishing process in coating iron or other metals with tin or other metal,
as alloy.
The Invention consists in constructing the apparatus in the form of
a circular pot with a hollow centre or otherwise, and with a frame or
turntable caused to rotate in the circular hot-air chamber. This frame
may consist of rings formed with studs or projections to support
removable partitions, between which the coated plates are placed, the
rings being held by radial arms carried out from a central support. The
cover of the hot chamber is provided with a slot opening, by which the
coated plates are inserted or withdrawn. The rotation of the frame is
produced by a hand wheel or otherwise, and as each plate in succession
reaches the slot opening it may be taken out and a fresh one inserted.
The drippings from the plates fall upon a bonnet, from which they run
into an annular space between the outside of the chamber and a circular
flange or fillet on which the bonnet rests; or in the absence of a bonnet
the drippings may drop on the body of metal in the bottom of the
chamber; the drippings may be tapped off when necessary by spouts at
different heights.

page_text: This Invention also provides that between the cover of the hot
chamber and an upper cover flues are formed, through which heat from
one or more fires circulates, thereby producing a uniform temperature in
the chamber. The brickwork supporting the chamber is situated under
the annular space before referred to, so that the metal therein is removed
from the direct action of the fires, and therefore preserved from oxidation.
Holes made be made in the bottom of the chamber and in the central
support of the frame to admit heated gases to the chamber; the chamber
may be heated by gas or from fires.
Figure 1 of the accompanying Drawings is a side elevation of a
circular pot constructed according to my Invention, and Figure 2 is a
plan of the same; Figure 3 is a section of the pot through A, B, of
Figure 2; Figure 4 is a plan of the frame; and Figure 5, a similar
view of the pot with the cover removed. The letters of reference
correspond in all the Figures.
A is the circular pot constructed of cast iron or other material; it is
formed with a hollow centre or pillar B, which rises from the bottom
thereof in the manner shown. The circular pot A is supported by
brickwork or masonry hollow in the middle to form a passage for heated
air or gases which is free to enter the pot through the holes a, b,
provided for that purpose in the base of the pot and in the hollow centre.
The interior of the pot has a circular flange or fillet c for supporting the
outer edge of a bonnet d, the inner edge of which fits over the hollow
centre, and carries a spindle e to which is connected a frame composed
of rings f, g, formed with rack studs or projections, between which
partitions h, h, are placed, as shown in Figures 3 and 4. The rings
are connected by radial arms i, i, to the central support or boss C of the
frame. The spindle on which the central frame is fitted has a hand
wheel attached to it to enable it to be turned in the required direction,
when the plates are required to be inserted or withdrawn. The upper
part of the circular pot is provided with a cover G, which is firmly
bolted to the flange or rim; the cover has a slot opening in it through
which the plates are passed; the opening is kept closed while the
apparatus is at work by a lid E, as seen in Figure 2. The space D
between the inside of the pot and the flange or fillet c forms a channel
to receive the liquid metal from the bonnet d upon which it drops from
the plates. From this channel the metal is drawn off by the overflow
pipes E and F; these are placed at different levels, so that a quantity

page_text: of fluid metal can be retained in the channel if desired for the purpose
of keeping up the required degree of heat in the circular pot. Above
the cover G I place another cover H provided with a rim or fillet k of
such a depth that a flue or passage is formed between the two covers.
The cover H is provided with a space or aperture corresponding in size
to the hinged lid E, so that the opening and closing movements of the
lid are not interfered with. The under surface of the upper cover H is
made with a semicircular rib m and a radial rib n, as seen in Figure 2,
so that the heated air or products of combustion passing through the
fluc are caused to take a circuitous route before leaving it.
And having now described the nature of my said Invention, and in
what manner the same is to be performed, I declare that I claim the
general arrangements and combinations of parts of the apparatus sub-
stantially in the manner and for the purpose herein-before described and
represented in the accompanying Drawings.
In witness whereof, I, the said George Nurse, have hereunto sct
my hand and seal, this Twenty-second day of April, in the year
of our Lord One thousand eight hundred and sixty-ninc.