An Improved Apparatus for Dressing White-lead and other Colors.
Year: 1888

page_text: Date of Application, 8th Nov., 1888
Complete Specification Left, 3rd Aug., 1889-Accepted, 14th Sept., 1889
PROVISIONAL SPECIFICATION.
An Improved Apparatus for Dressing White-lead and other Colors.
I ARTHUR JAMES SMITH of Devonshire House Battersea in the county of Surrey
Gentleman do hereby declare the nature of this invention to be as follows
When tho white-lead or other color has been duly pulverized or ground in water or
other suitable liquid it is ready for the next stage of its treatment. The object of
my invention is to provide an extremely efficient apparatus for this next stage or for
dressing the white-lead or other color.
To carry out this object I construct a cylinder the periphery whereof is not solid
but is composed of a series of ribs or bars whereover is or are stretched one or more
pieces of some fine textile material preferably silk whereby the whole periphery of
the cylinder is covered but the ends of the cylinder or parts thereof are left open.
The stream of color is led into this cylinder through one of its ends and the cylinder
which is duly mounted therefor in an horizontal or slightly inclined position is then
revolved rapidly and the finer particles of the color are projected through the textile
material on the periphery of the cylinder being received in a tank properly placed
therefor while the coarser particles of the color being prevented passing through the
fine textile material are discharged through the other end of the cylinder into another
tank.
D
AT
1000
COMPLETE SPECIFICATION.
An Improved Apparatus for Dressing White-lead and other Colors.
I ARTHUR JAMES SMITH of Devonshire House Battersea in the county of Surrey
Gentleinan 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 stateinent :-
When the white-lead or other color has been duly pulverized or ground in water or
other liquid it is ready for the next stage of its treatment. The object of this my
invention is to provide an extremely officient apparatus in and by which this next
stage of the treatment or that is to say what is called dressing the white-lead or other
color can properly steadily and equably be performed and effected.
In order the more clearly to explain this my invention and in what manner the
same is to be performed and carried into practice I refer to the accompanying drawing
wherein Figure 1 is a side elevation partly in section of my apparatus for dressing
white-lead and other colors and Figure 2 is a transverse vertical section of the
same.
I construct a cylinder A of any desired and suitable diameter and length the
periphery or perimeter whereof is not solid but is composed of a suitable number of
longitudinal ribs or bars B made of any suitable material preferably of wood which
are at the desired distances apart and the ends of these bars B are mounted in and
are secured to two discs (which form the ends of the cylinder A. To each of these
discs C and passing centrally therethrough is fitted a cylindrical sleeve D open at
both ends which sleeves D being mounted in suitable bearings made therefor serve as
and are and constitute the axis of the cylinder A whereon the same can revolve and
this cylinder A is so mounted by the sleeves D in the bearings as to be in a position
slightly inclined from the horizontal as is shewn in Figure 1. The sleeve D which is
fitted as aforesaid to the disc C at the higher and entrance end of the cylinder A can

page_text: very conveniently be somewhat smaller in diameter than the sleeve D' which is fitted
as aforesaid to the disc Cat the lower and exit end of the cylinder A and through
the sleeve D can very conveniently freely and loosely pass a fixed pipe E opening
into the interior of the cylinder A and this apparatus is so mounted as hereinbefore
described over or it may be in a suitable tank F. Round and over the bars B of the
cylinder A is or are placed one or more pieces of a very fine textile material G
in one or more layers or thicknesses (I preferably uso silk woven with an extremely
fine mesh) which material G is so secured to the end discs C or to the bars B near
the same or otherwise as may be preferred in each particular case that it does not
stretch and is not stretched tightly round and over these bars B transversely thereto
but is loose and slack thereon whoreby it can sag or bend between the same and this
sagging or bending will obviously be inwardly at the top and upper parts of the
cylinder and outwardly at the bottom and lower parts of the same.
The action of this apparatus is as follows.
The cylinder A is revolved by any usual and convenient means and appliances at
the proper speed which ought not to be so fast as to cause the material G by
centrifugal force to sag or bond outwardly all round this cylinder A but within this
limit is preferably as fast as possible and the stream of color when ready as
herein before described for this stage of the treatment flows through the pipo E into
the cylinder A and therein by the inwardly projecting bars B is lifted up and then
allowed to fall downwards on the bottom of the same whereby the finer particles of
the color are projected through the peripheral or perimetrical material G into the
tank F while the alternate outwardly and inwardly sagging or bending of this
material G tends to keep the mesh thereof clear and the interstices therein free and
open and thus allow these finer particles of the color to pass therethrough into the
tank F and as the cylinder A is inclined the color gradually passes along the same
being treated and acting in manner aforesaid until it reaches the exit end (thereof
where the coarser particles of the color which have not been and are not capable of
being projected and passed as aforesaid through the material G into the tank F pass
out of the cylinder A through the sleeve D' into another tank or elsewhero for
renewed or further treatment or otherwise while what has entered and been deposited
in the tank F has duly and properly undergone this stage of its usual treatment and
has been duly and properly dressed and is ready to be dealt with in the ordinary or
other manner.
In Figure 3 I shew one very good method of using and utilizing this my improved
apparatus for dressing white-lead and other colors as herein before described to the
best advantage.
As is hereinbefore described the stream of color flows through the pipe Ę into the
revolving cylinder A wherefrom the finer particles thereof pass into the tank F while
the coarser particles thereof pass into the tank H whence they can be removed to be
ground again or to be treated as may be desired. The finer particles gradually settle
in the tank F and the liquid still it may be bearing some of these finer particles over-
flows from this tank into the first of a series of tanks K thence into the
second of the series and so on in each of which tanks K more of these finer
particles settle until in the last tank K1 of the series the liquid is nearly if
not quite free therefrom and then the liquid is pumped up by the pump L into the
tank M wherefrom it flows through the pipe N to the shoot P and being there mixed
with another charge of material passes into the pan Q to be treated by the runners or
revolving stones therein and then again flows through the pipe E into the revolving
cylinder A and so on and this whole apparatus can be driven from and through and
by the shaft R in manner as is shewn in this Figure 3. As by this arrangement and
method of working the liquid is used over and over again it is obvious that no
material will be lost or wasted even if it does not all settle in the tanks during the
first time of using and I therefore prefer this method of and arrangement for using
and utilizing my invention but I do not limit myself thereto for my improved
apparatus for dressing white-lead and other colors may be used and utilized in
conjunction with any desired appliances and plan or method of operation.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. The apparatus for dressing white-lead and other colors substantially as herein-
before described and shewn in Figures 1 and 2 of the accompanying drawing.
2. The combination of a cylinder A consisting of the ends with axial sleeves D
passing therethrough the longitudinal bars B and the peripheral or perimetrical
inaterial G with a tank F substantially as herein before described.
3. In a revolving cylinder the combination with the ends Cand the longitudinal
bars B of the material G placed loosely and slackly therearound substantially as and
for the purpose herein before described and declared.
1000
HART & Co.