AN IMPROVED APPARATUS FOR PRESSING OR MOULDING BRICKS AND OTHER AGGLOMERATED ÅRTICLES OF LIKE KIND
Year: 1875

page_text: LETTERS PATENT to François Durand and Ernest Louis Marais, both
of No. 28, Boulevard de Strasbourg, Paris, in the Republic of
France, for the Invention of "AN IMPROVED APPARATUS FOR PRESSING OR
MOULDING BRICKS AND OTHER AGGLOMERATED ÅRTICLES OF LIKE KIND."
Sealed the 11th June 1875, and dated the 27th April 1875.
COMPLETE SPECIFICATION filed by the said François Durand and
Ernest Louis Marais at the Office of the Commissioners of Patents,
with their Petition and Declaration, on the 27th April 1875,
pursuant to the 9th Section of the Patent Law Amendment Act,
1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, FRANÇOIS
DURAND and ERNEST LOUIS MARAIS, both of No. 23, Boulevard de
Strasbourg, Paris, in the Republic of France, send greeting.
WHEREAS we are in possession of an Invention for "AN IMPROVED
) APPARATUS FOR PRESSING OR MOULDING BRICKS AND OTHER AGGLOMERATED ARTICLES
OF LIKE KIND,” and have petitioned Her Majesty to grant unto us, our

page_text: expulsion of the finished brick. This cam acts on the piston j by means
of two rollers k, k², mounted loosely on axes carried in bearings formed
at each end of the hollow cage j', which forms an extension of the
piston. This is guided in its motion by means of guides le, l, formed
in the checks of the framing a, a. The two outer cams n, n, also fixed
on the shaft & operate on levers d', d, pivotted to the framing at d², d³,
and bolted rigidly to a vertical plate &, which serves to close the exit
orifice of the mould A from the moment when the pressure begins to
the termination thereof, and which uncovers the mould when the piston
advances for expelling the brick therefrom on to the bars o, o, fixed in
an inclined position. The rigid holding of the plate during the
pressure is furthermore secured by means of two supports p, p, cast on
the framing.
In order to prevent the bricks, when expelled from the mould from
adhering to the face of the piston a small stirrup frame q is provided at
the end of the machine, into which the brick passos as it issues from
the mould. This stirrup frame is guided on either side by the framing a,
and is connected to the plate a³, which serves as a door to the mould by
means of two rods or guides » passing through cars & fixed to the door.
These guides have screw nuts & on their upper ends, so that when the
door d³ has been raised by the action of the cams ", n, operating on the
lovers d', d'³, and the brick has been entirely extruded, then by causing
the door to rise a little higher (which is effected by small projections on
the cams) the cars & in pushing against the nuts & will cause the stirrup
frame q and with it the brick to be slightly raised, and the brick being
thus made to slide against the face of the piston will become detached
therefrom. As the levers d' descend with the door the stirrup frame
also descends and brings the brick again to the level of the inclined
bars o.
It will be seen in Fig. 1 that small escape apertures x, x, are provided
in the sides and bottom of the mould, as also if requisite in the piston
itself, in order to allow of the escape of any excess of earth or other
material at the time of compression, and thus to prevent any injurious
resistance.
These escape apertures may be dispensed with by employing the
arrangement shown at Fig. 4, in which a portion of the bottom of the
mould at least equal to the width of the brick is made moveable, and is

page_text: claims with the piston j provided with rollers k, and the mould A with
hopper and inclined bars o for the reception of the finished bricks.
In witness whereof, we, the said François Durand and Ernest Louis
Marais, have hereunto set our hands and scals, this Twenty-sixth
day of April, in the year of our Lord One thousand eight hundred
and seventy-five.
0
Witness,
FRANÇOIS DURAND.
(L.S.)
ERNEST LOUIS MARAIS.
(L.S.)
CH. ARMENGAUD,
Civil Engineer,
Boulevard de Strasbourg, 23,
Paris.