Alloys of Zinc or other Coating Metal or Alloy.
Year: 1886

page_text: Date of Application, 25th June, 1886.
Complete Left, 23rd Mar., 1887.
Complete Accepted, 26th Apr., 1887.
or Alloys of Zinc or other Coating Metal or Alloy.
1 RICHARD HEATHFIELD of Lion Galvanizing Works Wiggin Street Birmingham
in the County of Warwick Manufacturer do hereby declare the nature of this
Invention to be as follows:-
My invention consists of the improvements hereinafter described whereby the
coating of sheet iron with zinc or alloys of zinc or other coating metal or alloy is so
effected that the quantity of the coating metal or alloy may be conveniently regulated
and a smoothness given to the surface of the coated sheet unattainable by the use of
the apparatus ordinarily employed.
I will describe my invention in its application to the coating of sheet iron with zinc.
The bath of melted zinc which I employ may either have a pair of horizontal rolls
or the said bath may preferably be provided with the additional pair of partly
immersed horizontal rolls having their axes in the same horizontal plane described and
represented in the specification of Letters Patent granted to me dated June 9th 1877
No. 2243. Or a bath having but one pair of rolls as described and represented in the
specification of Letters Patent granted to me dated June 27th 1877 No. 2480. The
said bath may also be provided with fixed guides for directing the path of the sheet of
iron under operation. Over the bath of melted zinc and a short distance above the
rolls referred to is a pair of rotary cylindrical brushes the said brushes having a
length somewhat greater than the length or breadth of the sheet operated upon
according as the sheet is immersed in the bath with its longer or shorter side
horizontal. The axes of the said bushes are parallel to the axes of the rolls herein
before referred to and the opposed faces of the said brushes are in the same vertical
plane as the opposed faces of the said rolls.
The coated sheet rising vertically from the bath passes between the rotary brushes
by which its opposed faces are simultaneously operated upon and the superfluous zinc
removed from the sheet the zinc remaining attached to the sheet is by the action of
the said brushes more effectually incorporated therewith.

page_text: The said brushes the opposed faces of which travel in the same direction inay so
rotate that their acting parts either travel in the same direction as the coated sheet on
which they are operating or in the opposite direction in which latter case the sheet is
raised by pressing rolls or otherwise. In the former case the zine removed from the
coated sheet is thrown outside the bath in the latter case it is returned to the bath.
Besides the motion of rotation given to the brushes they may have a motion of
translation that is they may have a swinging or to and fro motion in the lines of their
axes. By this motion combined with their rotatory motion the formation of lines or
streaks on the coated sheet is prevented. A very limited to and fro motion is
sufficient to prevent the formation of lines or streaks. The brushes in their to and
fro motion may either travel in the same or in opposite directions.
Above the rotary brushes described another pair of horizontal rolls may be placed
provided with guides to conduct the sheet from the brushes. The coated plate after
leaving the brushes is received and operated upon by the upper pair of rolls by the
action of which the surface of the coated sheet receives a high degree of finish.
When this upper pair of rolls is employed the bath may be without rolls.
When it is not desired to regulate the coating of zinc by the use of rotary brushes
they may be dispensed with and the coated plate after leaving the bath is received and
operated upon by the said upper pair of rolls.
The means whereby the required motions are given to the brushes and the upper
pair of rolls are matters of detail which I do not consider it necessary here to describe.
Dated this Twentyfifth day of June 1886.
W. T. WHITEMAN,
Agent for the Applicant.

page_text: -
.
or Alloys of Zinc or other Coating Metal or Alloy.
I RICHARD HEATHFIELD of Lion Galvanizing Works Wiggin Street Birmingham
in the County of Warwick Manufacturer do hereby declare the nature of my
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 consists of the improvements herein after described whereby the
coating of sheet iron with zinc or alloys of zinc or other coating metal or alloy is so
effected that the quantity of the coating metal or alloy may be conveniently regulated
and a smoothness given to the surface of the coated sheet unattainable by the use of
the apparatus ordinarily employed.
I will describe my invention in its application to the coating of sheet iron with zinc.
The bath of melted zinc which I employ may either have a pair of horizontal rolls
or the said bath may preferably be provided with the additional pair of partly
immersed horizontal rolls having their axes in the same horizontal plane described and
represented in the specification of Letters Patent granted to me dated June 9th 1877
No. 2243. Or a bath having but one pair of rolls as described and represented in the
specification of Letters Patent granted to me dated June 27th 1877 No. 2480 may be
employed.
The said bath may also be provided with fixed guides for directing the path of the
sheet of iron under operation. Over the bath of melted zinc and a short distance
above the rolls referred to is a pair of rotary cylindrical brushes the said brushes
having a length somewhat greater than the length or breadth of the sheet operated
upon according as the sheet is immersed in the bath with its longer or shorter sides
horizontal. The axes of the said brushes are parallel to the axes of the rolls herein
before referred to and the opposed faces of the said brushes are in the same vertical
plane as the opposed faces of the said rolls.
The coated sheet rising vertically from the bath passes between the rotary brushes
by which its opposed faces are simultaneously operated upon and the superfluous zinc
removed from the sheet the zinc remaining attached to the sheet is by the action of
the said brushes more effectually incorporated therewith.
The said brushes the opposed faces of which travel in the same direction may so
rotate that their acting parts either travel in the same direction as the coated sheet on
which they are operating or in the opposite direction in which latter case the sheet is
raised by pressing rolls or otherwise. In the former case the zinc removed from the
coated sheet is thrown outside the bath in the latter case it is returned to the bath.
Besides the motion of rotation given to the brushes they may have a motion of
translation that is they may have a swinging or to and fro motion in the lines of
their axes.
By this motion combined with their rotary motion the formation of lines
or streaks on the coated sheet is prevented. A very limited to and fro motion is

page_text: sufficient to prevent the formation of lines or streaks. The brushes in their to and fro
motion may either travel in the same or in opposite directions.
Above the rotary brushes described another pair of horizontal rolls may be placed
provided with guides to conduct the sheet from the brushes. The coated plate after
leaving the brushes is received and operated upon by the upper pair of rolls by the
action of which the surface of the coated sheet receives a high degree of finish.
When this upper pair of rolls is employed the bath may be without rolls.
When it is not desired to regulate the coating of zinc by the use of rotary brushes
they may be dispensed with and the coated plate after leaving the bath is received and
operated upon by the said upper pair of rolls.
The means whereby the required motions are given to the brushes and the upper
pair of rolls are matters of detail which I do not consider it necessary here to describe.
Figure 1 of the accompanying Drawings represents in end elevation partly in
transverse vertical section and Figure 2 in transverse vertical section apparatus for
galvanizing sheet iron constructed according to the invention for which Letters
Patent were granted to me dated June 9, 1877 No. 2243 with which apparatus
rotary cylindrical, brushes and finishing rolls according to my present invention are
combined.
The same letters of reference indicate the same parts in both Figures.
a is the bath containing the melted zinc or alloy of zinc or other coating metal or
alloy b, the ordinary pair of rolls in the said bath and c, e the additional pair of
partly immersed horizontal rolls having their axes in the same horizontal plane.
The sheet d to be coated is guided between the two pairs of rolls b, b and c c by the
fixed guides at e e.
Over the bath of melted zinc a and at a short distance above the
pair of rolls c c are the rotary cylindrical brushes ff. Between the rolls cc and
the rotary brushes ff are guides d² for the coated sheet d. The said brushes have a
length somewhat greater than the length or breadth of the sheet to be coated. It will
be seen by reference to Figure 2 that the axes of the brushes ff are parallel to the
axes of the rolls cc and the opposed faces of the said brushes are in the same vertical
plane as the opposed faces of the said rolls c c.
名
Each cylindrical brush is composed of a series of bundles of wire arranged
radially. The said bundles of wire are fixed at their inner ends in the central roller
or body of the brush by means of longitudinal dovetail bars inserted in dovetail
recesses in the central roller or body. The bases or inner ends of the bundles of wire
are placed in equi-distant holes in the bars and are fixed in the said bars by a rod or
wire passed through eyes at the bases of the bundles but I do not limit myself to any
particular method of building up the cylindrical brushes nor to the material of which
they are made but generally I make the acting parts of the brushes of wire as
described. The axes of the rotary cylindrical brushes are so supported that their
acting parts can be made to approach one another for the purpose of operating upon
the coated sheet as it emerges from the bath as represented in Figure 2 or separated
from one another so as to withdraw them out of contact with the coated sheet as
indicated in dotted lines in Figure 2. The arrangement for bringing together or
separating the rotary cylindrical brushes is seen in Figure 1. The ends of the axes
of the brushes are supported in bearing blocks g g sliding in slots in supports at the
top of the apparatus. The bearing blocks g g at each end of the apparatus are
connected together by the links hi constituting a toggle joint the axes & of the toggle
joints being connected by connecting rods or links to the shaft passing from end to
end of the apparatus. By depressing the handle on the shaft the toggle joint is
made to take the position represented in Figure 1 so as to bring the two brushes
closer together for operating upon the sheet and by lifting the handle into the
position indicated in dotted lines the parts of the toggle joint are straightened and the
two rotary brushes further separated from one another.
In addition to the rotary motion of the cylindrical brushes ff they may have a
slight longitudinal to and fro motion in the line of their axes for preventing as far as
possible the formation of lines or streaks on the coated sheet. I have not thought it
necessary to exhibit an arrangement for giving the limited to and fro motion to the

page_text: brushes as any of the well known arrangements of mechanism now in use for giving
like motions to rollers and other rotating bodies may be adopted.
Above the rotary brushes ff is a pair of horizontal finishing rolls m, m which may
be driven in any convenient way from the driving shaft of the apparatus.
Guides may be used to conduct the sheet from the rotary brushes ff to the
horizontal finishing rolls m, m. The rotary brushes may be driven by toothed
gearing from the rolls e c or the said brushes may be driven by independent gearing
but I do not limit myself to any particular arrangement for driving the said brushes.
The sheet d to be coated is passed through the bath a and between the rolls bb
and ec in the manner represented. The coated sheet rising vertically from the bath a
passes between the rotary brushes by which its opposed faces are simultaneously
operated upon and the superfluous zinc removed from the sheet the zinc remaining
attached to the sheet being effectually incorporated therewith by the action of the said
brushes. The coated sheet after leaving the brushes is received and operated upon by
the upper pair of rolls m m by the action of which the surface of the coated sheet
receives a higher degree of finish.
I do not confine myself to the combination with the coating apparatus of the rotary
cylindrical brushes and the upper pair of finishing rolls m m as the said pair of
rolls m m may be used alone when it is not wished to regulate the coating of zinc by
the use of rotary brushes and when a higher degree of finish is not required in the
coated plate or sheet the upper pair of finishing rolls is omitted.
Although I have represented my present improvements in combination with the
patented apparatus herein before referred to yet I do not limit myself thereto as my
present improvements may be used with coating baths having a single pair of rolls or
having rolls of various kinds more particularly those patented by me on the 27th day
of June 1877 No. 2480 and when the upper or finishing pair of rolls is employed the
bath may be without rolls.
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 what I claim is
First The combination with apparatus used for coating sheet iron with zinc or
alloys of zinc or other coating metal or alloy of a pair of rotary cylindrical brushes
or a pair of cylindrical brushes having both a rotary and a limited longitudinal to and
fro motion by the action of which pair of cylindrical brushes the opposed faces of the
coated sheet rising from the bath are simultaneously operated upon for the purposes
and substantially as hereinbefore described and illustrated in the accompanying
Drawings.
Secondly The combination with apparatus used for coating sheet iron with zinc
or alloys of zinc or other coating metal or alloy of a pair of finishing rolls situated
above the bath for giving to the coated sheet as it rises from the bath a higher degree
of finish substantially as herein before described and illustrated in the accompanying
Drawings.