IMPROVEMENTS IN THE METHOD OF AND APPARATUS FOR SEPARATING AND RECOVERING THE FATTY MATTERS FROM BONES
Year: 1880

page_text: LETTERS PATENT to Frank Wirth, of the Firm of Wirth and Company, Patent
Solicitors, at Frankfort on the Main, in the Empire of Germany, for an
"
Invention of IMPROVEMENTS IN THE METHOD OF AND APPARATUS FOR
SEPARATING AND RECOVERING THE FATTY MATTERS FROM BONES." A com-
munication from Friedrich Seltsam, of Forchheim, in the Empire of Germany.
PROVISIONAL SPECIFICATION left by the said Frank. Wirth at the Office
of the Commissioners of Patents on the 29th July 1880.
FRANK WIRTH, of the Firm of Wirth and Company, Patent Solicitors, at Frankfort
on the Main, in the Empire of Germany. "IMPROVEMENTS IN THE METHOD OF
AND APPARATUS FOR SEPARATING AND RECOVERING THE FATTY MATTERS FROM
BONES." [A communication from Friedrich Seltsam, of Forchheim, in the Empire
of Germany.]
The Invention communicated to me relates to improvements in the method of
and apparatus for extracting the fat from bones by the use of the vapours of
sulphuret of carbon, benzine, and the like substances under pressure.
In carrying out the Invention the apparatus employed consists of a chamber
serving as a vapour generator and extracting chamber, such chamber being con-
structed air tight and capable of sustaining a pressure of ten atmospheres.
At the commencement of the operation the chamber is filled with bones up to a
valve in a pipe at the upper part and is then closed air tight.
A pump now forces the necessary quantity of solvent liquid from a reservoir
through a pipe into the hereinbefore described extracting chamber.
The vapours produced force out the air through the first herein before described
pipe into a condenser in which the vapours passing in with the air are condensed,
and flow back by a pipe into the reservoir.
As soon as the air has passed out of the chamber and out of the pores of the
bones the valve in the pipe is closed.
The contents of the extracting chamber are now heated by a steam heating
apparatus to such a degree as to produce a pressure of several atmospheres; this

page_text: pressure is maintained for a time, and by this means the fat is melted out of the
innermost part of the bones under treatment, and runs down and collects at the
bottom of the apparatus.
As soon as the fat is extracted a valve in a pipe leading from the chamber to a
distilling apparatus is opened, and the superheated liquid is allowed to flow under
high pressure into the distilling apparatus in which the solvent is distilled from
the fat by suitable steam heating.
The vapours of the solvent pass through a pipe into the condenser, whence they
flow into the reservoir to be used over again.
As soon as the gauge on the chamber shows that pressure has ceased the
herein before described valve in the pipe leading to the distilllng apparatus is again
shut and the apparatus re-heated, by which means any solvent still remaining in
the bones passes out through the open valve of the pipe at the upper part of the
chamber.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Frank Wirth in the Great Seal Patent Office on the 11th December
1880.
"
FRANK WIRTH, of the Firm of Wirth and Company, Patent Solicitors, at Frankfort-
on-the-Main, in the Empire of Germany, IMPROVEMENTS IN THE METHOD OF
AND APPARATUS FOR SEPARATING AND RECOVERING THE FATTY MATTERS FROM
BONES." A communication from Friedrich Seltsam, of Forchheim, in the Empire
of Germany.
The Invention communicated to me relates to improvements in the method of
and apparatus for extracting the fat from bones by the use of the vapours of
sulphuret of carbon, benzine, and the like substances under pressure.
In carrying out the Invention the apparatus employed may consist of a chambor
serving as a vapour generator and extracting chamber, such chamber being con-
structed air tight and capable of sustaining a pressure of ten atmospheres.
At the commencement of the operation the chamber is filled with bones up to a
valve in a pipe at the upper part and is then closed airtight.
A pump now forces the necessary quantity of solvent liquid from a reservoir
through a pipe into the hereinbefore described extracting chamber, in which it is
transformed into vapour by any suitable apparatus.
The vapours produced force out the air through the first hereinbefore described
pipe into a condenser, in which all solvent in the form of vapour passing in with
the air is condensed, and passes back by a pipe into the reservoir.
As soon as the air has passed out of the chamber and out of the pores of the
bones the valve in the pipe is closed.
The contents of the extracting chamber are now heated by a steam heating
apparatus to such a degree as to produce a pressure of several atmospheres; this
pressure is maintained for a time, and by this means the fat is melted out of the
innermost part of the bones under treatment, and runs down and collects at the
bottom of the apparatus.
As soon as the fat is extracted a valve in a pipe leading from the chamber to a
distilling apparatus is opened, and the superheated liquid is allowed to pass under
bigh pressure into the distilling apparatus in which the solvent is distilled from
the fat by suitable steam heating.
The vapours of the solvent pass through a pipe into the condenser, whence they
flow into the reservoir to be used over again.
As soon as the gauge ou the chamber shows that pressure has ceased the
herein before described valve in the pipe leading to the distilling apparatus is again
closed and the apparatus reheated, by which means any solvent still remaining in
the bones passes out through the open valve of the pipe at the upper part of the
chamber.
But to make the Invention communicated to be better understood, I will proceed
to describe the same by reference to the accompanying Drawing, which represents
a side elevation of a suitable construction of apparatus for carrying out the
Invention.
A is the air tight chamber constructed to withstand a pressure of ten atmospheres,
and serving as a vapour generator and extracting chamber, which at the commence-
ment of the operation is filled wth bones up to the valve in the pipe E, and is then
closed air tight; B is the pump which forces the necessary quantity of solvent
liquid from the reservoir C through the pipe D into the extracting chamber A.
The vapours produced force out the air through the pipe E into the condenser F,
where all solvent in the form of vapour passing in with the air is condensed and
Q 4816. Wt. 17811.

page_text: passes back through the pipe G into the reservoir C, and when the air has passed
from the chamber A and from the bones the said pipe E is closed.
The contents of the extracting chamber A are now heated by means of a suitable
steam heating apparatus to a sufficient degree as will produce a pressure of
several atmospheres, such pressure being maintained until the fat is melted out
of the bones under treatment, such fat running down and collecting at the bottom
of the apparatus. The fat being thus extracted the valve in the pipe H is opened
and the superheated liquid is allowed to flow under high pressure into the
distilling apparatus I, and the solvent is distilled from the fat by suitable means,
such as by steam heating, and the vapours of the solvent pass through the pipe K
into the condenser F, whence they pass in the form of vapour into the reservoir C to
be again used; and as soon as the gauge on the chamber A indicates that the
pressure has ceased the valve in the pipe H is again closed, the apparatus is
reheated, by which means any solvent which may still remain in the bones passes
out through the open valve in the pipe E.
Having thus described the Invention communicated to inc, and the best incans
with which I am acquainted for carrying the same into effect, I wish it to be
understood that what is claimed and desired to be protected by the herein in-part
recited Letters Patent is,-
Firstly. The use of the vapours of sulphuret of carbon, benzine, ether, canadol,
or ligroin, under pressure, for extracting the fat from bones, as hereinbefore
described.
Secondly. The construction and employment for extracting the fat from bones of
the hereinbefore described apparatus, such apparatus mainly consisting of the
extracting chamber A, in combination with the reservoir C, pump B, condenser F,
and distilling apparatus I, arranged and operating substantially as hereinbefore
described and represented in the accompanying Drawing.
In witness whereof, I, the said Frank Wirth, have hereunto set my hand and
seal, this Thirtieth day of November, in the year of our Lord One thousand
eight hundred and eighty.
FRANK WIRTH. (L.S.)