Im- PROVEMENTS IN THE MANUFACTURE OF BRICKS OR BLOCKS FROM GranulatedARATUS FORHATPURPOS
Year: 1873

page_text: LETTERS PATENT to Charles Wood, of the Tees Iron Works, Middles-
bro'-on-Tees, in the County of York, for the Invention of "Im-
PROVEMENTS IN THE MANUFACTURE OF BRICKS OR BLOCKS FROM Granulated
PROVISIONAL SPECIFICATION left by the said Charles Wood at the
Office of the Commissioners of Patents, with his Petition, on the
3rd July 1873.
I, CHARLES WOOD, of the Tees Iron Works, Middlesbro'-on-Tees, in
the County of York, do hereby declare the nature of the said In-
vention for "IMPROVEMENTS IN THE MANUFACTURE OF BRICKS OR BLOCKS FROM
GRANULATED SLAG, AND IN APPARATUS FOR THAT PURPOSE," to be as follows :—
This Invention has for its object to manufacture concrete bricks from
slag sand in a moist state, more especially from slag sand produced by
the granulating machine described in the Specification of a Patent
granted to me, No. 2618, in the year 1872, and which contains a large

page_text: quantity of moisture. If this slag sand is put into moulds to be
compressed into blocks in the ordinary manner the water or moisture it
contains not being able to escape, the proper compression of the meterial
is prevented. To obviate this I propose to insert into the piston or
pistons, or. dies, a piece of gauze wire, either in single thickenesses or
many thicknesses, or composed of a small block or pad of woven wire.
This is to be fixed upon the die or pistons, or recessed into the same,
so as to allow the moisture to pass through. The back of the gauze
wire or pad, or where it rests upon the piston or die, will have channels
which will communicate with a hole or holes through the centre or
side of the piston or dies, so as to allow the water to flow out, so as
not to come again in contact with the brick or compressed block.
Cloth composed of hemp, cotton, horsehair, or grass, or a combination
of wire, hemp, cotton, or horsehair, may if preferred be used in lieu of the
wire, or a piece of rope cord, which can be recessed into the dic or piston,
or laid upon it, may be employed, the bottom of the recess having
holes for the escape of the water. The gauze wire, or rope, or cloth,
may also be fixed upon the surface of the die, so as to form a recess in
the brick or block. Or the piston may be composed of a series of
plates laid closely together, the water escaping between the joints of
the plates; or there may be laid upon the face of the die a plate in
brass or steel, having a series of small holes, which holes communicate
with the holes through the piston or die.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Charles Wood in the Great Seal Patent Office on 2
the 2nd January 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
WOOD, of the Tees Iron Works, Middlesbro'-on-Tees, in the County
of York, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her 3
Letters Patent, bearing date the Third day of July, in the year of our
Lord One thousand eight hundred and seventy-three, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Chrales Wood, Her special license

page_text: that I, the said Charles Wood, my executors, administrators, and
assigns, or such others as I, the said Charles Wood, my executors, admi-
nistrators, 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 THE
MANUFACTURE OF BRICKS OR BLOCKS FROM GRANULATED SLAG, AND IN APPARATUS
FOR THAT PURPOSE," upon the condition (amongst others) that I, the
said Charles Wood, 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 Charles Wood, 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 to manufacture concrete bricks from
slag sand in a moist state, more especially from slag sand produced by
the granulating machine described in the Specification of a Patent
granted to me, No. 2618, in the year 1872, and which contains a large
quantity of moisture. If this slag sand is put into moulds to be.
compressed into blocks in the ordinary manner the water or moisture
it contains not being able to escape, the proper compression of the
material is prevented. To obviate this I propose to insert into tho
piston, or pistons, or dies, a piece of gauze wire, either in single thick-
nesses or many thicknesses, or composed of a small block or pad of
woven wire.
This is to be fixed upon the die or pistons, or recessed
into the same, so as to allow the moisture to pass through. The back.
of the gauze wire or pad, or where it rests upon the piston or die, will
have channels which will communicate with a hole or holes through
the centre or side of the piston or dies, so as to allow the water to flow
out, so as not to come again in contact with the brick or compressed
block.
Cloth composed of hemp, cotton, horschair, or grass, or a com⭑
bination of wire, hemp, cotton, or horsehair, may if preferred be used.

page_text: in lieu of the wire. Or a piece of rope cord, which can be recessed
into the die or piston, or laid upon it, may be employed, the bottom
of the recess having holes for the escape of the water. The gauze
wire, or rope, or cloth, may also be fixed upon the surface of the dic,
bo
so as to form a recess in the brick or block. Or the piston may
composed of a series of plates laid closely together, the water escaping
between the joints of the plates, or there may be laid upon the face
of the die a plate in brass, or steel, having a series of small holes,
which holes can communicate with the holes through the piston or

page_text: or it may be only a single thickness. The water is squeezed by the
pressure through the pads D and H, and flows away into trough F,
as before described, through the hole E.
In Figure 3 the pad is composed of a piece of wire rope, and the
water flows round the piston into the trough F, as before.
What I claim is, the means of and apparatus for the manufacture of
concrete bricks or blocks from granulated slag, substantially as
described.
In witness whereof, I, the said Charles Wood, have hereunto set
my hand and seal, this Twenty-fourth day of December, in the
year of our Lord One thousand cight hundred and seventy-
three.