Improvements in or Additions to Apparatus used for Galvanizing Sheets and Plates of Iron.
Year: 1891

page_text: Date of Application, 10th July, 1891.
Complete Specification Left, 29th Mar., 1892-Accepted 30th Apr., 1892
FROVISIONAL DI PUITICAL
Improvements in or Additions to Apparatus used for Galvanizing
Sheets and Plates of Iron.
I THOMAS JONES of Atlas Tube Works Netherton near Dudley in the County
of Worcester Manufacturer do hereby declare the nature of this invention. to be
as follows:-
My invention consists of apparatus used for galvanizing sheets and plates of iron
the parts of the said apparatus being constructed and arranged and used in the
mauner hereinafter described.
The object of the apparatus constituting my invention is to scrape or remove the
superfluous coating metal from both sides of the sheet or plate as it leaves the
galvanizing bath; also to give a uniform coating to the surfaces of the sheet or
plate and to economise the consumption of the zinc or coating metal employed.
In carrying my invention into effect I use a bath of the ordinary kind for holding
the galvanizing or coating metal the said bath having immersed in it the ordinary
pair of rolls for conveying by their motion the sheet or plate through the bath.
Over that part of the top of the bath at which the coated sheet or plate emerges L
arrange a pair of scrapers between the scraping edges of which the coated sheet or
plate passes so as to remove the superfluous coating metal from both sides of the
sheet or plate. One of these scrapers is fixed and the other is jointed to the top of
the bath so that it can he pressed to and removed from the fixed scraper. The
Inovable or jointed scraper is operated by a foot treadle and a connecting rod jointed
to one arm of the scraper.
I make these scrapers by preference of plates of iron between which boards of
asbestos are clamped the protruding edges of the asbestos constituting the scraping
edges; but other refractory material may be employed in place of asbestos.
The sheet or plate to be galvanized is passed into the bath at one side in the
ordinary way and between the pair of rolls immersed in the bath and rising upwards
is conducted between the pair of scrapers described which are open or separated
from one another and the end of the sheet or plate is gripped by a pair of tongs
above the bath and connected to a rope passing over. a pulley in the ordinary way.
The foot treadle being pressed upon by the workman the necessary pressure is put
upon the jointed scraper and as the coated sheet emerges from the bath and rises
vertically it passes between the two scrapers and both of its surfaces are operated
upon and scraped by the said scrapers and the superfluous coating metal thereby
removed from them as before described.
The acting edges of the asbestos or other scrapers may when required be so
shaped as to give a spangled effect to the coated metal on the faces of the sheet.or
plate passing between them.
Dated the 10th dov of Lulu 1901
W. T. WHITEMAN,
Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in or Additions to Apparatus used for Galvanizing
Sheets and Plates of Iron.
I THOMAS JONES, of Atlas Tube Works Netherton near Dudley in the County
of Worcester, Manufacturer, do hereby declare the nature of my invention and in
what manner the same is to be performed to be particularly described and ascer-
tained in and by the following statement :-
My invention consists of apparatus used for galvanizing sheets and plates of iron,

page_text: the parts of the said apparatus being constructed and arranged and used in the
manner hereinafter described.
1
The object of the apparatus constituting my invention is to scrape or remove the
superfluous coating metal from both sides of the sheet or plate as it leaves the
galvanizing bath; also to give a uniform coating to the surfaces of the sheet or
plate and to economise the consumption of the zine or coating metal employed.
In carrying my invention into effect I use a bath of the ordinary kind for holding
the galvanizing or coating metal; the said bath having immersed in it the ordinary
guides or the ordinary pair of rolls for conveying by their motion the sheet or plate
through the bath. Over that part of the top of the bath at which the coated sheet
or plate emerges, I arrange a pair of scrapers between the scraping edges of which
the coated sheet or plate passes so as to remove the superfluous coating metal from
both sides of the sheet or plate. One of these scrapers is. fixed and the other is
jointed to the top of the bath so that it can be pressed to and removed from the
fixed scraper.
The movable or jointed scraper is operated by a foot treadle or hand
lever and a connecting rod jointed to one arm of the scraper.
I make these scrapers by preference of plates of iron between which boards of
asbestos are clamped, the protruding edges of the asbestos constituting the scraping
edges; but other refractory material may be employed in place of asbestos.
The sheet or plate to be galvanized, is passed into the bath at one side in the
ordinary way and between the pair of rolls immersed in the bath and rising upwards
is conducted between the pair of scrapers described which are open or separated
from one another and the end of the sheet or plate is gripped by a pair of tongs
above the bath and connected to a rope passing over a pulley in the ordinary way.
The foot treadle being pressed upon by the workman the necessary pressure is put
upon the jointed scraper and as the coated sheet emerges from the bath and rises
vertically it passes between the two scrapers and both of its surfaces are operated
upon and scraped by the said scrapers and the superfluous coating metal thereby
removed from them as before described.
Figure 1 of the accompanying drawings represents in cross section and Figure 2
in side elevation, a galvanizing bath to which a pair of scrapers and appliances
connected therewith constructed according to my invention are combined.
a is the bath containing the melted zinc or coating metal, having arranged in it
the ordinary pair of rolls b, for conveying by their motion the sheet or plate c
through the bath and between the pair of scrapers dande to the tongs or grippers
by which the said sheet or plate is gripped, the said tongs being connected to the
rope passing over the pulley k as usual.
The axes of the pair of immersed rolls b, bare geared together by the spur
wheels l, m at one end of the bath and the said rolls are driven by the toothed wheel n,
pinion and winch g at the other end of the bath as seen in Figure 2.
The pair of scrapers d, e for removing the superfluous coating metal from both
1:8 or surfaces of the sheet or plate being galvanized is arranged over that part
oi the bath at which the coated sheet or plate energes, each scraper having a
length, a little greater than the breadth of the sheet or plate being coated. The
fixed scraper is marked d and the movable or jointed scraper is marked e. The said
scrapers are made preferably of plates of iron between which boards of asbestos
are clamped, the projecting edges of the asbestos constituting the scraping edges.
as seen in Figure 1, but other refractory material may be used in place of nsbestos.
The board of asbestos of the fixed scraper d is clamped to the iron seat by the
clamping plate and screw bolts at 3 and the asbestos board of the movable or
jointed scraper is fixed to the iron plate by the clamping plate and screw bolts
ate. The lower edge of the plate of the movable scraper is hinged by the joint
pin and the knuckle joints showu in. Figure 2 to the top of the galvanizing bath a
so that the said movable scraper can by the turning of the joint pin in the fixed
knuckles on the bath be pressed to or removed from, the fixed scraper d. The
movable or jointed scraper e is operated by the foot treadles (or a hand lever) and
connecting rod t, the upper end of the latter being jointed to the onter end of the
ין

page_text: cranked arm u, the inner end of which is fixed to the end of the joint pin + of
the jointed scraper. By pressing down the foot treadles, the movable scraper can
be forced with the required pressure against the sheet or plate being galvanized
and by lifting the foot treadle the movable scraper can be withdrawn from the fixed
scraper as indicated in dotted lines in Figure 1. The weight of the jointed soraper
causes it to take, when at liberty to move, nearly the position shown in continuous
lines in Figure 1.
In galvanizing a sheet or plate of iron by the use of the apparatus represented,
the sheet or plate is passed into the bath a at one side and between the pair of
rolls b,.b immersed in the bath and rising upwards is conducted between the pair
of scrapers d, e which are open or separated from one another, that is, the movable
scraper has the position indicated in dotted lines in. Figure 1 and the end of the
sheet or plate is gripped by the tongs or gripper f. The rolls being act in motion
the foot treadles is pressed upon by the workman and the jointed scraper e thereby
pressed to the fixed scraper d and the necessary pressure put upon it and as the
coated sheet emerges from the bath and passes between the two closed scrapers d, e
both of its surfaces or faces are operated upon and scraped of the superfluous
coating metal by the said scrapers and a uniform coating thereby given to the
said surfaces as will be understood by an examination of Figure 1.
The acting edges of the asbestos or other scrapers may, when required, be so
shaped as to give a spangled effect to the coated metal on tho faces of the sheet
or plate passing between them.
My improved scrapers and appliances connected therewith may be applied to or
combined with baths for galvanizing sheets or plates of iron of various kinds.
For example the bath may be furnished with curved guides for conducting the
sheet or plate to and from the rolls immersed in the bath as represented in
Figuro 3, where the curved guides are marked w, w. Or the rolls may be situated
outside the bath and push the sheet or plate to be galvanized through a curved
guide immersed in the bath as represented in Figure 4 where the outside rolls are
marked, and the curved guide is marked .
The fixed and jointed scrapers and appliances connected with tliem combined
with the baths represented in Figures 3 and 4 are used in the same manner as the
like parts in Figures 1 and 2 and corresponding parts are marked with the saine
letters of reference.
Having now particularly described and ascertained the nature of my invention
and the manner in which the same is to be performed I declare that I claim as
my invention of "Improvements in or additions to apparatus used for galvanizing.
sheets and plates of iron.;
The addition to or combination with the bath holding the galvanizing or coating
metal of a pair of scrapers consisting of a fixed scraper and a movable or jointed
scraper between the scraping edges of which scrapers the coated' sheet or plate as
it emerges from the bath passes and is pressed upon by the said scrapers and the
superfluous coating metal thereby scraped or removed from both sides or surfaces
of the sheet or plate, the pair of scrapers being constructed and the jointed
scraper operated substantially as hereinbefore described and illustrated in the
accompanying drawings.
Dated the Twenty-fifth day of March 1892.