Improved Apparatus for Use in the Manufacture of White Lead.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improved Apparatus for Use in the Manufacture of White Lead.
I, ARTHUR HENRY EYLES of Pelhamville, Westchester County, State of New
York, United States of America, Chemist, do hereby declare the nature of this
Invention to be as follows:-
My invention relates to carbonizing machines and has special reference to that
class of machines which are used in the manufacture of white lead for carbonizing
lead acetate, lead protoxide, etc.
My invention has for its object a carbonizing machine which will produce a
very superior and evenly-finished product and also greatly shorten the time of
production, and it consists in the construction and arrangement of machine
hereinafter described.
The machine consists of a carbonizing barrel which is carried upon hollow
axles or trunnions journalled in suitable standards and provided with a driving
pulley. The barrel is provided with inlet and outlet pipes communicating with
the hollow trunnions and the inlet pipe is also provided with branch pipes for the
introduction into the barrel of carbon dioxide and oxygen as hereinafter described.
Located within the barrel and mounted upon the inside face of the walls thereof
are perforated pallets which may be of any desired form or material but are
preferably formed of angle-irons which are bolted to the barrel by their flanges.
The pallets are arranged in tracks or paths around the periphery of the barrel the
individual pallets of adjacent tracks or rows being displaced or staggered.
Mounted over the orifice of the inlet pipe of the barrel is a baffle having a per-
forated stem and having its convex face towards the inlet pipe of the barrel, a
similar baffle being mounted over the outlet pipe of the barrel having its concave
port on or face towards the said outlet pipe."
The operation of my device is as follows: -The mass to be carbonized is placed
in the barrel and the barrel set in rotation when the pallets will operate to stir
the mass very thoroughly as owing to the pallets being staggered the mass will
be very thoroughly agitated and as it flows through and around about the pallets
air spaces will be temporarily formed which will heighten the stirring effect.
As the mass is being stirred, carbonic acid gas is introduced through the inlet
pipe by means of one of the pipes branched thereon which carbonic acid gas flows
through the hollow trunnion and is dispersed by the baffle attached thereto and
caused to flow through the barrel in a shell or cylindrical form carbonizing the
mass and the spent gas issues through the opposite trunnion and outlet pipe
whose baffle co-operates with the baffle mounted over the orifice of the inlet pipe
to ensure a more efficient distribution of the gas, the baffles thus constituting
the gas distributors. It may happen that it is necessary to introduce oxygen to
oxidize the lead or lead oxide while the carbonization is going on and this oxygen
may be introduced at the same time as the carbon dioxide by means of the other
branch on the inlet pipe.
From the foregoing it will be quite obvious that I have produced an efficient

page_text: carbonizing apparatus for that the staggered perforated pallets stir up the
material and cause an efficient exposure of the material to the gas and the baffles
cause an equal diffusion of the gas and prevent the gas from blowing straight
through the apparatus.
Dated this 17th day of August 1897
A. M. & WM.
CLARK,
53, Chancery Lane, London, Chartered Patent Agents.
Improved Apparatus for Use in the Manufacture of White Lead.
I ARTHUR HENRY EYLES Chemist of Pelhamville, Westchester County, State
of New York, United States of America 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 statement:-
My invention relates to carbonizing machines and has special reference to that
class of machines which are used in the manufacture of white lead for carbonizing
lead acetate, lead protoxide etc.
My invention has for its object to produce a very efficient carbonizing machine
and consists in the construction and arrangement hereinafter pointed out and
claimed.
In the accompanying drawing Figure 1 is a sectional elevation of an apparatus
embodying my invention, the section being a central transverse longitudinal
section through the body of the barrel in which the carbonizing takes place;
Figure 2 is a section on line 2-2 of Figure 1, looking in the direction of the
arrow;
Figure 3 is a detail view of one of the pallets or stirrers hereinafter referred to.
In the drawing, A is a carbonizing barrel which is carried upon hollow axles
or trunnions B B journalled in suitable standards C C. D) is a driving pulley
for the barrel, E E are inlet pipes which communicate with the inlet pipe F of
the barrel A. G is the outlet pipe from the barrel. These pipes communicate
with the hollow axles B and B respectively. Located within the barrel A and
mounted upon the inside face of the walls thereof are perforated pallets a a¹.
These pallets may be of any desired form or material, but are preferably angle-
irons, as shown, which are bolted to the barrel by their flanges a². The pallets
are arranged in tracks or paths around the periphery of the barrel, the individual
pallets of adjacent tracks or rows being displaced or staggered. Mounted over
the orifice of the inlet pipe of the barrel is a baffle H having a perforated stem I
and having its convex face turned towards the inlet pipe of the barrel. Mounted
over the outlet pipe of the barrel is a similar baffle H having its concave portion
or face turned toward the said outlet pipe.
The operation of my device is as follows:-The mass to be carbonized is placed
in the barrel and the barrel set in rotation, when it will be obvious that the pallets
will operate to stir the mass very thoroughly, as the pallets being staggered, the
mass will be very thoroughly agitated, and as it flows through and around about
the pallets, air spaces will be temporarily formed which will heighten the stirring
effect. As the mass is being stirred, carbonic acid gas is introduced through the
inlet pipe F, being supplied say by the pipe E. This carbonic acid gas flows
through the hollow trunnion B₁ and is dispersed by the baffle H and caused to
flow through the barrel in a shell or cylindrical form carbonizing the mass, and
the spent gas issues through the trunnion B and outlet pipe G, the baffle H'

page_text: co-operating with the baffle H to insure a more efficient distribution of the gas,
the baffles thus constituting gas distributors.
It may happen that it is necessary to introduce oxygen to oxidize the lead or
lead oxide while the carbonization is going on. This oxygen may be introduced
at the same time as the carbon dioxide, being brought to the inlet pipe F by the
pipe E.
From the foregoing it will be quite obvious that I have produced an efficient
carbonizing apparatus for that the staggered perforated pallets stir up the material
and cause an efficient exposure of the material to the gas and the baffles cause an
equal diffusion of the gas and prevent the gas from blowing straight through
the apparatus.
With the above described apparatus a very superior and even finished article
is produced and the time of production greatly shortened.
Now while I have described in specific terms the various elements of my
apparatus, I would have it understood that I do not mean to thereby limit myself
to such elements as it will be understood that the construction may be varied
without departing from the spirit of my invention.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is :-
1. In a carbonizing machine, the combination of a barrel A, a series of per-
forated pallets a, arranged in rows upon the inside of the ciroular wall of the
said barrel, a series of perforated pallets a¹ also arranged in rows upon the inside
of the circular wall of the barrel, the pallets in adjoining rows being displaced
or staggered with respect to each other so as to produce a flow of the mass to be
carbonized through around and between the pallets so as to effect a very thorough
carbonization, and means for uniformly distributing the gas to the mass in the
barrel, substantially as described.
2. The combination of a barrel, pallets arranged within said barrel and
staggered with respect to each other, gas inlet and outlet ports and gas distributing
apparatus consisting of baffles H. H' covering the said inlet and outlet ports and
effecting the even diffusion of the gas through the apparatus, the said baffle H
having its convex portion towards the inlet and the said baffle H₁ having its
concave portion towards the outlet, substantially as described.
1907
A. M. & WM.
CLARK,
53 Chancery Lane, London, Chartered Patent Agents.
A. M. & WM.
CLARK,
53 Chancery Lane, London, Chartered Patent Agents.