IMPROVEMENTS IN MACHINERY FOR GRINDING AND CRUSHING CLAY AND BRICK EARTH
Year: 1857

page_text: LETTERS PATENT to John Alleyne Bosworth, of Humberstone, in the
County of Leicester, Gentleman, for the Invention of "IMPROVEMENTS IN
MACHINERY FOR GRINDING AND CRUSHING CLAY AND BRICK EARTH."
Sealed the 12th February 1858, and dated the 13th August 1857.
PROVISIONAL SPECIFICATION left by the said John Alleyne Bosworth
at the Office of the Commissioners of Patents, with his Petition, on the
13th August 1857.
I, JOHN ALLEYNE BOSWORTH, of Humberstone, in the County of Leicester,
Gentleman, do hereby declare the nature of the Invention for "IMPROVE-
MENTS IN MACHINERY FOR GRINDING AND CRUSHING CLAY AND BRICK EARTH," to
be as follows:-
This Invention has for its object improvements in machinery for grinding:
and crushing clay and brick earth. For these purposes a circular track or
platform is used, the circular iron frame of which is constructed in sections,
which are fixed together by screws, bolts, and nuts, or other convenient means;
on this circular frame iron bars are placed side by side and in radial directions,
there being a space between each two neighbouring bars. On this circular..
track or platform edge stones or runners roll, and they are caused to do so by
an upright shaft or axis, which receives a rotatory motion from a steam engine
power by suitable gearing; the arms from the upright shaft are

page_text: attached by pin joints to the axes of the runners or edge stones in such
manner that the outer ends of such axes, on which the runners or edge stones
revolve, may rise and fall. Between the axis and the inner edge of the circular
track or platform a conical incline is formed, on to which the clay or brick
earth is placed, and down which it slides to the circular track or platform.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Alleyne Bosworth in the Great Seal Patent Office
on the 12th February 1858.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
ALLEYNE BOSWORTH, of Humberstone, in the County of Leicester, Gentleman,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing-date the Thirteenth day of August,. in the year of our Lord. One
thousand eight hundred and fifty-seven, in the twenty-first year of Her reign,
did, for Herself, Her heirs and successors, give and grant unto me, the said
John Alleyne Bosworth, Her special licence that I, the said John Alleyene
Bosworth, my executors, administrators, and assigns, or such 'others as I, the
said John Alleyne Bosworth, 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 "IM-
PROVEMENTS IN MACHINERY FOR GRINDING AND CRUSHING CLAY AND BRICK EARTH,"
upon the condition (amongst others) that I, the said John Alleyne Bosworth,
my executors or administrators, by an instrument in writing under my, or
their, or one of their hands and seals, 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 immediately after the date of the said
Letters Patent.
NOW KNOW YE, that I, the said John Alleyne Bosworth, 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:-
'This Invention has for its object improvements in machinery for grinding
and crushing clay and brick earth. For these purposes à circular track or

page_text: platform is used, the circular iron frame of which is constructed in sections,
which are fixed together by screw bolts and nuts, or other convenient means;
on this circular frame iron bars are placed side by side, and in radial directions,
there being a space between each two neighbouring bars; on this circular
track or platform edge stones or runners roll, and they are caused to do so by
an upright shaft or axis, which receives. a rotatory motion from a steam engine
or other power by suitable gearing; the arms from the upright shaft are
attached by pin joints to the axes of the runners or edge stones in such
manner that the outer ends of such axes, on which the runners or edge stones
revolve, may rise and fall. Between the axis and the inner edge of the
circular track or platform a conical incline is formed, on to which the clay
or brick earth is placed, and down which it slides to the circular track or
platform.
Having thus stated the nature of my Invention, I will proceed more fully
to describe the manner of performing the same.
DESCRIPTION OF THE DRAWING.
Figure 1 is a plan, and Figure 2 is an elevation, in section, of machinery
arranged suitably for carrying out my Invention, which consists of crushing
clay by means of rollers on surfaces, made up of bars having narrow spaces
between them through between which the clay as it is crushed, is pressed; hence
no stones or foreign matters can pass with the clay without being first crushed,
if they be of larger dimensions than the narrow slits or passages formed in the
beds or surfaces on which the crushing rollers act. The form of the machinery
may be varied, but the arrangement shown by the Drawing is that which is
preferred. a, a, is the surface which is in the form of a circular track, made
up in sections and composed of numerous bars, through between which there
are narrow spaces, as shown. For making ordinary bricks, I prefer that the
narrow spaces should be about one-eighth of an inch wide, but where it is
desired, this width of slits or spaces may be varied according as the quality of
the clay is desired to be coarser or finer. is an upright shaft or axis, which
receives motion from a steam engine or other power, by means of the bevil
wheel c, which takes into and drives the bevil toothed wheel d, fixed on the
upright shaft or axis 6. The runners e, e, are connected with arms f. f, these
arms being attached to the upright shaft or axis in such manner, that the
runners or crushing rollers may rise and fall. Around the outer circumference
of the surface a is an inclined guard or fence g, and on the inner edge of the
circular track is an incline h. The clay in a plastic state is continually
shovelled or otherwise fed on to the circular track, and as the runners roll

page_text: round such track they will crush the clay and force the same through between
the bars a, a, of which the bed or surface a is composed...
Having thus described the nature of my said Invention and the manner of
performing the same, I would have it understood that I make no claim to any
of the mechanical parts separately; but what I claim is the mode herein
described of combining mechanical parts into a machine for grinding and
crushing clay.
In witness whereof, I, the said John Alleyne Bosworth, have hereunto
set my hand and seal, this Sixth day of February, in the year of our
Lord One thousand eight hundred and fifty-eight.
Witness,
JNO. ALCOCK.
JOHN ALLEYNE BOSWORTH. (L.S.)