IMPROVEMENTS IN APPARATUS FOR PRESSING AND EXTRACTING OIL PROM SEEDS, AND FORMING OIL CAKES
Year: 1871

page_text: COMPLETE SPECIFICATION filed by Isaac Marshall at the Office of
the Commissioners of Patents, with his Petition and Declaration,
on the 18th November 1871, pursuant to the 9th Section of the
Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ISAAC
MARSHALL, of Sheffield, in the County of York, Dealer in Bones and
Hoofs, send greeting.
WHEREAS I am in possession of an Invention for "IMPROVEMENTS
IN APPARATUS FOR PRESSING AND EXTRACTING OIL PROM SEEDS, AND FORMING
OIL CAKES," and have petitioned Her Majesty to grant unto me, my
executors, administrators, and assigns, Her Royal Letters Patent for the
same, and have made solemn Declaration that I am the true and first
Inventor thereof.
NOW KNOW YE, that I, the said Isaac Marshall, do hereby declare
that the following Complete Specification, under my hand and seal,
fully describes and ascertains the nature of the said Invention, and in

page_text: what manner the same is to be performed, in and by the following
statement, reference being had to the Drawings hereunto annexed, and
to the letters and figures marked thereon (that is to say) :-
My Invention of "Improvements in Apparatus for Pressing and
Extracting Oil from Seeds, and Forming Oil Cakes" has reference to the
moulds in which the seed bags are enclosed in order to be submitted to
hydraulic or other pressure in the ordinary manner, and consists in
making such moulds of horn instead of wood, or horsehair, or other
material heretofore employed for the purpose.
The top and bottom slab of the mould are both formed of strips of
horn placed transversely of the slab, and fastened together by means of
rods with screwed ends, passing through each strip and secured at each
end of the slabs in such a manner as to unite the several strips into
slabs of horn. Between each strip of horn is inserted a strip of calico
or other fabric or felt. After the strips have been so united, transverse
grooves or concavities are formed on the inner sides of the slabs, and
bands of twisted horsehair are fixed on the outer edges of the slabs,
through which the expressed oil is allowed to pass out of the mould.
The oil can also pass out through the said strips of fabric or felt.
The two slabs of horn formed or constituted in the manner above
stated, are combined to form a mould by means of a leather hinge, to
which also is fixed a leather handle to facilitate the removal of the
mould. Moulds thus constructed of horn will be more durable as well
as more elastic than those hitherto constructed of wood or other
material.
Fig. 1 is a plan or horizontal view of the inside of the mould; Fig. 2
is a longitudinal vertical section of the mould. In both these Figures 30
the same letters of reference indicate corresponding parts.

page_text: fabric or felt between each strip of horn) form or constitute the two
slabs of the mould; C, C, are bars of iron in which are inserted the ends
of the fastening rods D, D, screwed at their ends and passing through
the end blocks A, A, and the intervening strips B, B, the said blocks
and strips being firmly united together by means of the screw nuts E, Ę.
The leather binge F, and the leather handle G, are also secured by
means of the same fastening screws D, D, and screw nuts E, E; H, H,
are the bands of twisted horsehair fixed to the outer edges of the slabs,
which are left flat to receive the same, the portions of the slabs between
the horsehair bands being grooved, as shown.
Moulds composed of buffalo, or ox, or other horn constructed in the
manner described, are adapted to combine durability in wear with
elasticity in working.
Having thus described the nature of the said Invention, and in what
manner the same is to be carried into effect, I hereby declare that I do
not claim as of my Invention any of the parts of the mould separately
considered, nor when combined with any other material than horn.
But what I do claim as of my Invention is the construction of moulds
for pressing seeds and forming oil cakes, composed of strips of horn
fastened together by means of longitudinal rods and screws, in the
manner herein-before described.
In witness whereof, I, the said Isaac Marshall, have hereunto set
my hand and seal, the Seventeenth day of November, in the year
of our Lord One thousand eight hundred and seventy-one.
ISAAC MARSHALL. (L.s.)
Witness,
R. P. WALKER,
George Street, Sheffield,
Clerk to Messrs. Broomhead, Wightman, & Moore,
Solicitors,
Sheffield.