IMPROVEMENTS IN MEANS OR APPARATUS DAMIAN AD QUOSAVORO BAD BOOD
Year: 1872

page_text: LETTERS PATENT to Peter Forbes, of 99, Houndsditch, in the City of
London, for the Invention of "IMPROVEMENTS IN MEANS OR APPARATUS
DAMIAN AD QUOSAVORO
BAD BOOD"
Scaled the 25th April 1873, and dated the 2nd November 1872.
PROVISIONAL SPECIFICATION left by the said Peter Forbes at the
Office of the Commissioners of Patents, with his Petition, on the
2nd November 1872.
I, PETER FORBES, of 99, Houndsditch, in the City of London, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
MEANS OR APPARATUS FOR THE PRESERVATION OF SUBSTANCES FOR FOOD," to be as
follows:-
The object of one part of my improvements is to regulate the heat or
pressure inside the tins or cans containing the matters to be preserved
during the process of cooking, for their preservation. For this purpose,
in place of allowing the free and immediate escape of the heat and
consequent pressure inside such tins or cases, I adjust the pressure inside
the tins or cases to the heat employed. A pipe with a tap to each affords

page_text: an adjustable means for regulating the passage, but I do not confine
myself thereto.
Another part of my Invention relates to arranging heating chambers
for the heating of tins or vessels containing the substances to be pre-
served, so that during the heating communication is retained between
the interior of the tins or cases and the external atmosphere. In carrying
out this part of the Invention the chamber in which the heat is to be
applied to the tins or vessels is provided with a cover adapted to close
and retain the heat within it, such cover having openings in it for the
passage of the tins or cases or for the pipes therefrom. Surrounding
each of these openings packing is provided or a surface acting as-such
to act against cach case or tin so as to prevent the escape of heat from
the chamber at such parts, and yet admit of communication between
the interior of each case or tin and the outer atmosphere.
SPECIFICATION filed in pursuance of the conditions of the Letters
Patent, and of an Order of the Lord Chancellor, by the said Peter
Forbes in the Great Seal Patent Office on the 15th May 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, PETER
FORBES, of 99, Houndsditch, in the City of London, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Second day of November, in the year
of our Lord One thousand eight hundred and seventy-two, in the thirty-
sixth year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said Peter Forbes, Her special license
that I, the said Peter Forbes, my executors, administrators, and
assigns, or such others as I, the said Peter Forbes, 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 "IMPROVEMENTS IN
MEANS OR APPARATUS FOR THE PRESERVATION OF SUBSTANCES FOR FOOD," upon
the condition (amongst others) that I, the said Peter Forbes, my execu-

page_text: tors or administrators, by an instrument in writing under my, or their,
or one of their hands and seals, should particularly describe and aṣcer-
tain 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 Peter Forbes, 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 :-
The object of one part of my improvements is to regulate the heat or
pressure inside the tins or cases containing the matters to be preserved
during the process of cooking, for their preservation. For this purpose,
in place of allowing the free and immediate escape of the heated vapours
or gas and the consequent pressure inside such tins or cases, I adjust the
pressure inside the tins or cases to the heat required in the tins or cases.
A pipe with a tap or valve to each tin or case affords an adjustable means
for regulating the passage, but I do not confine myself thereto.
Another part of my Invention relates to arranging heating chambers
for the heating of tins or vessels containing the substances to be pre-
served, so that during the heating communication is retained between
the interior of the tins or cases and the external atmosphere. In carrying
out this part of the Invention the chamber in which the heat is to be
applied to the tins or vessels is. provided with a cover adapted to close
and retain the heat within it, such cover having openings in it for the
passage of the tins or cases or for the pipes therefrom. Surrounding
each of these openings packing is provided or a surface acting as such
to act against each case or tin, so as thereby to prevent the escape of
heat from such heating chamber at such parts, and yet admit of com-
munication between the interior of each case or tin and the outer
atmosphere by the adjustable channel. This packing may be applied to
the inside of the openings to act on the end surface of the tins or cases
placed against those openings, or it may be applied so as to act against
the side surfaces of them as they are passed down through those openings
to the extent desired.
The heating of the chamber is by steam or other heating media, as is
well understood, and separately forms no part of my Invention.

page_text: Having thus described my Invention and means which I adopt in
carrying the same into effect, I would have it understood that what I
claim is the improvements in means or apparatus for the preservation of
substances for food, substantially as described.
In witness whereof, I, the said Peter Forbes, have hereunto set i
my hand and seal, this Twenty-second day of February, in the
year of our Lord One thousand eight hundred and seventy-
three.