IM- PROVEMENTS IN PRESERVING BUTTER AND OTHER FATTY MATTERS, AND IN THE APPARATUS OR MEANS EMPLOYED THEREIN
Year: 1872

page_text: LETTERS PATENT to John Henry Johnson, of 47, Lincoln's Inn Fields,
in the County of Middlesex, Gentleman, for the Invention of "IM-
PROVEMENTS IN PRESERVING BUTTER AND OTHER FATTY MATTERS, AND IN THE
APPARATUS OR MEANS EMPLOYED THEREIN." - A communication from
abroad by the Firm of Enault and Company, of Paris, in the
Republic of France.
COMPLETE SPECIFICATION filed by the said John Henry Johnson at
the Office of the Commissioners of Patents, with his Petition and
Declaration, on the 28th June 1872, pursuant to the 9th Section of
the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the County of Middle-
sex, Gentleman, send greeting.
WHEREAS I am in possession of an Invention for
PRESERVING BUTTER AND OTHER FATTY MATTERS, AND IN
"IMPROVEMENTS IN
THE APPARATUS OR
MEANS EMPLOYED THEREIN," and have petitioned Her Majesty to grant

page_text: unto me, my executors, administrators, and assigns, Her Royal Letters
Patent for the same, and have made solemn Declaration that the said
Invention is communicated to me from abroad by the Firm of Enault
and Company, of Paris, in the Republic of France.
NOW KNOW YE, that I, the said John Henry Johnson, 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 what manner the same is to be performed in and by the following
statement:-
In the preservation of butter, grease, and other fatty matters it bas
been found that it is not sufficient to enclose or isolate the said sub-
stances in a closed case, but that it is necessary to avoid the use of any
kind of solder applied directly to the enclosing case, by reason of the heat
applied during the operation of soldering tending to melt and deteriorate
the fatty matty to be preserved. The Inventors have therefore intro-
duced a peculiar arrangement for effecting the perfect preservation of
fatty matters, which is illustrated by the accompanying Drawing.
The fatty matter to be preserved is placed in a metal casing a of
cylindrical form, the end covers of which are secured to the edges of
the cylinder by being bent over as shewn at c after the system Bourgine.
In this manner the butter or other fatty matter may be packed or com-
pressed inside the cylinder without employing any solder after the
butter is packed. Should the mode of securing the ends by bending
or doubling their edges over the ends of the cylinder not be considered
sufficient, the soldering iron may be passed round the exterior of the.
junction, but this should be done before introducing the fatty matter
into the tin as, after this has been effected no solder whatever must be
applied lest the fatty matter be deteriorated. The metal casing con-
taining the fatty matter of any kind is placed inside another metallic
casing d, from which it is kept from actual contact by means of the
supports e placed crosswise or at right angles to each other at the top
and bottom. There will thus be left a surrounding space of about half
an inch, say, between the sides and ends of the internal casing and
those of the exterior one, which space is to be filled with water or a
liquid saturated or charged with carbonic acid gas. The ends of the
exterior case not being in contact with the fatty matter may be soldered
in the usual manner, the gas which is generated in the space between
the two cases exerts a pressure which causes the ends of the outer case

page_text: to bulge as shown in the Drawing, thus imparting to them the form
best suited for resistance, which is of great importance during transport.
The butter or other fatty matter thus isolated may be kept sound for an
indefinite length of time and carried any distance.
Having now described and particularly ascertained the nature of the
said Invention, and the manner in which the same is or may be used
or carried into effect, I would observe that what I claim as novel and
original, and therefore desire to secure by Letters Patent is, the system
or mode of and means for preserving butter, grease, and other fatty
matters, by introducing the said substance into a metallic casing, to
which no solder is applied after the fatty matter has been introduced
therein. Such casing being placed inside an outer air-tight metallic
casing, and isolated therefrom by means of suitable props or supports,
so as to leave a surrounding space which is filled in with a liquid
charged or saturated with carbonic acid gas of sufficient pressure to
bulge outwards the ends of the said outer casing substantially as
and for the purpose herein-before described and illustrated by the
Drawing.
In witness whereof, I, the said John Henry Johnson, have to this
my Complete Specification, set my hand and scal, the Twenty-
eighth day of June One thousand eight hundred and seventy-
two.