IMPROVEMENTS MACHINERY FOR DRYING WHITE LEAD AND OTHER SIMILAR SUBSTANCES."
Year: 1875

page_text: IN.
LETTERS PATENT to William Bramham, of Bow, in the County of
Middlesex, Engineer, for the Invention of " IMPROVEMENTS
MACHINERY FOR DRYING WHITE LEAD AND OTHER SIMILAR SUBSTANCES."
MACHINERY FOR DRYING WHITE LEAD AND OTHER SIMILAR SUBSTANCES."
PROVISIONAL SPECIFICATION left by the said William Bramham at
the Office of the Commissioners of Patents, with his Petition, on
the 9th March 1875.
I, WILLIAM BRAMHAM, of Bow, in the County of Middlesex, Engineer,
3 do bereby declare the nature of the said Invention for "IMPROVEMENTS
IN MACHINERY FOR DRYING WHITE LEAD AND OTHER SIMILAR SUBSTANCES," to be
as follows:-
My Invention of improvements in machinery for drying white lead
and other similar substances consists of a machine in which one or more
horizontal plates are fixed on a vertical shaft and caused to revolve by
suitable gearing, the whole being enclosed in a hot-air room heated by a
suitable furnace.. I employ suitable apparatus for regulating the

page_text: admission of cold air to the room and the exit of the hot and aqueous
vapors, and adjust the temperature of the room to any degree of heat
required.
In one side of the room a feed chamber is situated which projects
inside and allows a portion of the horizontal plate to be exposed, and as
the plate revolves cach portion of it is successively brought through the
feed chamber, thus enabling the wet material to be put on the plate at
one side of the chamber and after it has passed round the room and got
dried to be taken off at the other side, thus making the operation con-
tinuous, as each portion of the plate as it gets relieved of the dried
material is being constantly fed with fresh wet material. In the case of
white lead and other pulpy and semi-fluid substances I insert a feed
roller inside the room close to the feed chamber (in some cases the roller is
fixed in the feed chamber itself) the roller being so adjusted as to lay
on the table a layer of any thickness required, and by feeding the
material direct from the pumps upon the plate inside the feed chamber
nearest the feed roll and causing the plate to revolve the material is
spread in a thin layer and dried on its passage through the room by the
current of hot air passing through, when it is taken off the plate by a
suitable scraper as it emerges into the feed chamber again and is passed
down a shoot or along a worm to the receptacle for it.
For crystals and other like substances not in a liquid state the feed
roll is not required.

page_text: our Lord One thousand eight hundred and seventy-five, in the thirty-
eighth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said William Bramham, Her special license
that I, the said William Bramham, my executors, administrators, and
assigns, or such others as I, the said William Bramham, my executors,
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
MACHINERY FOR DRYING WHITE LEAD AND OTHER SIMILAR SUBSTANCES," upon
the condition (amongst others) that I, the said William Bramham, my
executors or administrators, by an instrument in writing under my, or
their, or one of their hands and scals, 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 Seal Patent Office within six calendar months next and immedi-
ately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Bramham, do hereby
declare the nature of the 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, that is to say :-
My Invention of improvements in machinery for drying white lead
and other similar substances consists of a machine in which one or more
horizontal plates are fixed on a vertical shaft and caused to revolve by
suitable gearing, the whole being enclosed in a hot-air room heated by a
suitable furnace. I employ suitable apparatus for regulating the
admission of cold air to the room and the exit of the hot and aqueous
vapours, and adjust the temperature of the room to any degree of heat
required.
In one side of the room a feed chamber is situated which projects
inside and allows a portion of the horizontal plate to be exposed, and as
the plate revolves cach portion of it is successively brought through the
feed chamber, thus enabling the wet material to be put on the plate at
one side of the chamber and after it has passed round the room and got
dried to be taken off at the other side, thus making the operation
continuous, as each portion of the plate as it gets relieved of the dried
material is being constantly fed with fresh wet material. In the case of

page_text: white lead and other pulpy and semi-fluid substances I insert a feed
roller inside the room close to the feed chamber. In some cases the
roller is fixed in the feed chamber itself, the roller being so adjusted
as to lay on the table a layer of any thickness required. By feeding the
material direct from the pumps upon the plate inside the feed chamber
nearest the feed roll and causing the plate to revolve the material is
spread in a thin layer and dried on its passage through the room by the
current of hot air passing through, when it is taken off the plate by a
suitable scraper as it emerges into the feed chamber again and is passed
down a shoot or along a worm to the receptacle for it.
For crystals and other like substances not in a liquid state the feed
roll is not required.
In some cases steam coils are used in addition to the other heating
and drying arrangements.
And in order that my said Invention may be well understood and
carried into effect I will now proceed to describe it more in detail,
referring to the Drawings hereunto annexed, in which the same letters
of reference refer to similar parts.
Figure 1 shows a section on line A, B, on sectional plan, Figure 3;
Figure 2 is a section on line C, D, on plan, Figure 4; Figure 3 is a 2
sectional plan on line E, F, of Figure 1; Figure 4 is a plan. G is the
horizontal plate on which the material is dried, in this case six in
number; H is the vertical shaft on which the plates are fastened; I is
the gearing which cause the plate to revolve; J is the furnace for
heating the stove; K is the stove; L is the feed chamber.
The substance to be dried is delivered on the plate G at a, a, and is
then carried through the stove K (which is kept at the required tem-.
perature by the furnace J) until it comes to the scraper b, b, when if it
is dry the scrape is dropped and the substance runs down the shoot c.
into the barrel d.
It is obvious the machine could also be worked continuously by having.
a fixed scraper and regulating the speed so that the plates move so
slowly that the substance is dried on its passage through, and in this
case the scraper would always be taking the substance off, and the feed
at a, a, would always have to be continuous.
The pipe M is for the exit of aqueous vapour, the cold air inlet is not
shown, neither is the feeding arrangement.
2
3

page_text: up
The arrangement shewn in the Drawing is for drying any thickness.
to one inch. Should it be required to dry a very thin layer, say
th iuch, rollers would have to be used to lay it, and the rollers
being hollow, cold water would be kept passing through them.
DESCRIPTION OF THE DRAWING.
The machine as shewn consists of six horizontal plates fixed on a
vertical shaft, the whole being enclosed in a brick chamber or stove
which is heated to any required temperature by suitable furnaces laying
on the bottom. On one side of the stove is inserted a cast-iron recess or
feed chamber, which is .so constructed that the horizontal plates pass
through it.
The material to be dried is put on the horizontal plates cither by being
pumped on or otherwise, and is carried with it through the stove, it
being understood that the machine is always revolving and gets dried in
its passage through, when it is taken off by, the scraper and falls down
a shoot into a tub or other receptacle.
Having now described the nature of my said Invention and how the
same is to be carried into effect I would have it understood that what I
claim and desire to secure by the herein-before in part recited Letters
Patent is, the drying of white lead and other similar substances by.
means of horizontal plates enclosed in a stove and in combination with
a feed chamber, as hercin-before described and illustrated by the
Drawings hereunto annexed.
In witness whereof, I, the said William Bramham, have hereunto
set my hand and seal, this Ninth day of September, in the
year of our Lord One thousand eight hundred and seventy-five.
WILLIAM BRAMHAM. (L.S.)
Witness,
CHARLES BARLOW,
23, Southampton Buildings,
Chancery Lane,
London, W.C.,
Patent Agent.
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