Year: 1888

page_text: We, THOMAS CONSTANTINE FAWCETT, of Whitehouse Engineering Works, Hunslet
Road, Leeds, in the County of York, Machine Maker, and THOMAS CASTLE, of The
Lodge, Snodland, Rochester, in the County of Kent do hereby declare the nature of
this invention to be as follows:
The object of our invention is to dispense with the mechanism and system of making
cement at present employed, and substitute therefor a new and more effective form of
apparatus for that purpose.
In carrying out our invention we place the substances (such as clay and chalk, or
other materials from which cement is manufactured) into an ordinary form of clay
mixer, where the substances get mixed, and afterwards pass into the grinding pan,
having heavy rollers therein, for grinding the said substances, which are forced through
a perforated grate into a dish. The whole of the bottom of the grinding pan may be
perforated, or certain portions of it may be blank, as found most desirable. The
ground substances fall from the dish through other perforations into another mixer,
having revolving screws therein, which work and lift the ground substances into or
between a pair of revolving rollers, employed to crush the substances, allowing it to
drop into any ordinary form of pugmill. We also place into the said pugmill the
necessary fuel, forming part of and to be mixed with the cement. This fuel is lifted
by travelling elevators and is received by another pair of revolving rollers, which
crush such fuel, the said fuel then passing into a hopper and being conducted to the
pugmill, there to be mixed and blended with the previous mixture or "slurry
already entered therein, such pugmill mixing all the ingredients thoroughly and well
together, after which the cement falls into another hopper, from whence it is removed
and treated in the ordinary manner.
Dated this 14th day of June 1888.
29
TASKER & CROSSLEY,
Halifax, Agents.

page_text: COMPLETE SPECIFICATION.
A New Combination of Machinery for Mixing or Making Cement.
We, THOMAS CONSTANTINE FAWCETT, of Whitehouse Engineering Works, Hunslet
Road, Leeds, in the County of York, Machine Maker, and THOMAS CASTLE, of The
Lodge, Snodland, Rochester, in the County of Dorset, 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 :-
The object of our invention is to dispense with the mechanism and system of
making cement at present employed, and substitute therefor a new and more effective
form of apparatus.
In carrying out our invention we place the substances (such as clay and chalk, or
other materials from which cement is manufactured) into an ordinary form of grinding
pan, having heavy rollers therein for grinding and mixing the said substances, which
are afterwards forced through perforated grates into a dish. The whole of the bottom
of the grinding pan may be perforated, or certain portions of it may be blank, as
found most desirable. The ground substances fall from the pan through the perfora-
tions into another stationary pan or dish and from thence into a mixer, having
revolving screws therein, which work and force the ground substances into or between
revolving rollers, employed to crush the substances, allowing it to drop into any
ordinary form of pugmill, from which it is received and conveyed to the burning kiln
or drying floor.
Such being the nature and object of our invention, we will now proceed to describe
the same more fully, and for that purpose make reference to the accompanying sheet
of drawings illustrative thereof, wherein Fig. 1 shews the arrangement of our
combined machines for manufacturing cement, and Fig. 2 is plan view thereof. A
represents an ordinary form of grinding pan having heavy revolving rollers B and
a partially perforated bottom C, through which the ground and crushed substances
are forced as the pan revolves. Under the perforated bottom of the grinding pan is a
dish or shell D, the bottom of which is also perforated, for the ground substances to
pass through and fall into a mixing pan E, which is open at the top to permit the
ground substances to enter, such mixing pan being provided with either one or two
revolving wiper shafts or screws, which are employed for the purpose of thoroughly
mixing the chalk and clay which has been previously crushed and ground in the
grinding pan. The materiels then drop into a hopper F, and are conducted between
revolving rollers G where the materials are further crushed previous to dropping into
the pugni H where the ingredients are mixed and blended with or without fuel
already placed therein, such pugmill mixing all the ingredients thoroughly and well
together, and carrying them forward by internal screws which force the material
through a die I from whence it is received by the endless travelling belt J, or by a
barrow or wagon, which carries the material to the burning kilns or onto a drying
floor to receive the subsequent and well known processes of manufacture.

page_text: By the combination of machines as herein shewn and described, the process of
mixing and making cement is much more quickly performed than by the present
method, besides considerably reducing the manual labour employed therein.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that we
do not confine ourselves to the exact form and number of machines employed, nor to
their relative order in which they are described, as it is evident that the order and
number may be altered, but what we do claim is :-
Firstly. The manufacture of cement by the combination of machines substantially
like those herein shewn and described.
Secondly. The employment, in combination with a pugmill or other like machine,
of an endless travelling belt for conveying the mixed substances from a pugmill
to a burning kiln or drying floor as herein shewn and described.
Dated this 8th day of March 1889.
TASKER & CROSSLEY,
Halifax, Agents.