A NEW AND IMPROVED INSTRUMENT TO BE USED IN CRUSHING OR EXPRESSING OIL PROM VEGETABLE AND OTHER SUBSTANCES, AND IN MAKING OIL CAKE, AND WHICH INSTRUMENT IS APPLICABLE TO THE MOULDING, PRESSING, AND MANUFACTURING THE SAME AND OTHER ARTICLES FROM PLASTIC MATERIALS
Year: 1847

page_text: TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
ROBSON, of Dover, in the County of Kent, Engineer, send greeting.
WHEREAS Her present most Excellent Majesty Queen Victoria, by Her
Royal Letters Patent under the Great Seal of the United Kingdom of
Great Britain and Ireland, bearing date at Westminster, the Fifteenth day
of April, One thousand eight hundred and forty-seven, in the tenth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said James Robson, my exors, admors, and assigns, Her especial
licence, full power, sole privilege and authority, that I, the said James
Robson, my exors, admors, and assigns, or such others as I, the said James
Robson, my exors, admors, or assigns, should at any time agree with, and
no others, from time to time and at all times during the term of years therein
expressed, should and lawfully might make, use, exercise, and vend, within
England, Wales, and the Town of Berwick-upon-Tweed, my Invention of "A
NEW AND IMPROVED INSTRUMENT TO BE USED IN CRUSHING OR EXPRESSING OIL
PROM VEGETABLE AND OTHER SUBSTANCES, AND IN MAKING OIL CAKE, AND WHICH
INSTRUMENT IS APPLICABLE TO THE MOULDING, PRESSING, AND MANUFACTURING THE
SAME AND OTHER ARTICLES FROM PLASTIC MATERIALS;" in which said Letters
Patent is contained a proviso that I, the said James Robson, shall cause a
particular description of the nature of my said Invention, and in what manner
the same is to be performed, by an instrument in writing under my hand

page_text: and seal, to be inrolled in Her said Majesty's High Court of Chancery within
six calendar months next and immediately after the date of the said in
part recited Letters Patent, as in and by the same, reference being thereunto
had, will more fully and at large appear.
NOW KNOW YE, that in compliance with the said proviso, I, the said
James Robson, do hereby declare that the nature of my said Invention;
and the manner in which the same is to be carried into effect, are fully
described and ascertained in and by the following description thereof, reference
being had to the Drawings hereunto annexed, and to the figures and letters
marked thereon, that is to say:-
In crushing and expressing oil from various vegetable and other substances
when making oil cake, it has been usual to employ an instrument made of
horsehair, technically called "hairs," and to subject the same to pressure in
a powerful press until the oil has been expressed, the horsehair fabric used
serving to conduct the oil out from the substance, which for the time is being
compressed. It has been found that the hair fabric of such instrument soon
becomes clogged, and thereby incapable of properly performing its work.
Now, tho object of my Invention is to substitute for such instrument of
haircloth an instrument constructed of metal, as hereafter explained.
DESCRIPTION OF THE DRAWING.
Figure 1 shews an internal view of the two surfaces of which the instru-
ment is composed; Figure 2 shews an external view of the same; Figure 3
is a longitudinal section, the parts being opened; Figure 4 shews a longitudinal
section of the parts being closed, having matter to be pressed between them;
and Figure 5 shews a transverse section, taken at a, b. In Figure 1, c, d, are
the two plates of which the instrument is composed; and it will be seen that
they correspond in shape and character with those heretofore made of hair-
cloth, which may, however, be varied. The two plates or surfaces c, d, are
connected together by a piece of leather b, which serves as a hinge, and there
is a handle e, as shewn. The plates c, d, have each a rim f along each of
the two sides and the end of one of them, as shewn. This rim I prefer to
bo of the form shewn by the Drawings, the object of which is to prevent
the material being pressed beyond the edges of the plates c, d; and there
are other projections 9, 9, which produce a succession of hollows h, h, and
ridges 9, 9, across each of the plates c, d, the ridges on the plate c being
so arranged as to come into the hollows between the ridges on the plate d,
as is clearly shewn in Figure 4. i, i, are a series of small holes through
the hollowed parts of each of the plates c, d, opening into grooves j, j,

page_text: across the back of each of the plates c, d. These holes I make of one six-
teenth of an inch diameter, and about half an inch apart; I do not, however,
confine myself to those dimensions. The linseed or other matter to be
pressed is prepared and placed between the plates c, d, and passed as here-
tofore when using a like instrument made of hair. I would remark, that
amongst other advantages to be derived from the employment of an instru-
ment, such as herein-described, over the use of "hairs," may be mentioned
a saving in cost, great durability, and a less injurious effect upon the bags;
the extracting of oil is also greatly facilitated.
Having thus described the nature of my said Invention, and the manner
of carrying the same into effect, I would have it understood that I do not
confine myself to the precise details herein shewn and described, so long as
the peculiar character of my Invention be retained. But what I claim is the
constructing of an instrument (to be used in crushing or expressing oil from
vegetable and other substances, and in making oil cake), of metal surfaces c, d,
having ridges and hollows, as herein described.
In witness whereof, I, the said James Robson, have hereunto set my
hand and seal, this Eighth day of October, in the year of our Lord
One thousand eight hundred and forty-seven.

page_text: of the reign of His late Majesty King William the Fourth, intituled "An Act
to amend the Law touching Letters Patent for Inventions."
DAVID DUNDAS.
AND BE IT REMEMBERED, that on the Eighth day of October, in
the year of our Lord 1847, the aforesaid James Robson came before our
said Lady the Queen in Her Chancery, and acknowledged the Specification
aforesaid, and all and every thing therein contained and specified, in form
above written. And also the Specification aforesaid was stamped according to
the tenor of the Statute made for that purpose.