Manufacture of Nutritious Products from Yeast.
Year: 1897

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 11 of the Patents, &c. Act, 1883) as required by
the decision of the Comptroller General of the 5th day of May 1898.
Date of Application, 3rd June, 1897
Complete Specification Left, 6th July, 1897-Accepted, 27th Nov., 1897
PROVISIONAL SPECIFICATION.
Manufacture of Nutritious Products from Yeast.
I, JOHN GOODFELLOW, Analytical Chemist, of 198 High Road, Leyton, in the
County of Essex, do hereby declare the nature of this invention to be as follows:
My invention relates to the treatment of yeast in such a manner as to obtain
a nutritious product in the form of a viscous liquid, paste or powder.
I may use distillers' yeast or brewers' yeast. If distillers' yeast be used, it
is thoroughly washed, sifted and filter pressed. If brewers' yeast be used it is
washed in weak lime water and filter pressed. The yeast to be treated is divided
into three approximately equal portions each of which is treated as follows.
Portion I. is digested for about 24 hours at a temperature of 120° to 140° Fahr.
in an equal weight of a weak solution of lactic acid, for which hydrochloric acid
may be substituted, or a solution of caustic potash or soda. A suitable strength
of solution is about 0.1 per cent. and the digestion is best effected in vessels pro-
vided with suitable heating and agitating arrangements. The product of this
treatment, which I may term product A, contains albuminates and other nutritious
substances.
Portion II. is digested for 6 hours at a temperature of 100° Fahr. with an
02 per cent. solution of hydrochloric acid and pepsine and the albumoses,
peptones and para peptone that are formed along with other soluble matters are
filtered off, constituting what I may term product B.
Portion III. is maue alkaline by addition of sodium carbonate, and digested
for 6 hours at a temperature of 100° Fahr. with a glycerine extract of ox or
sheep pancreas, and the peptones, albumoses and other extractures which are
formed, are filtered off, constituting what I may term product C.
The solid residues after filtration may be treated as Portion II. or Portion III.
The several products A, B and C obtained as above described may be con-
centrated to any desired consistence by evaporation in vacuo, and may be used
separately as articles of food; or any two of them or all may be mixed either
before or after their concentration, in any desired proportions. The products
may be reduced to the form of powders by drying the concentrated material at a
temperature not exceeding 150° Fahr. and pulverising.
Dated this 3rd day of June 1897.
ABEL & IMRAY,
Agents for the Applicant.

page_text: Manufacture of Nutritious Products from Yeast.
I, JOHN GOODFELLOW, Analytical Chemist, of 198 High Road, Leyton, in the
County of Essex, do hereby declare the nature of this invention and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement:-
My invention relates to the treatment of yeast in such a manner as to obtain
nutritious products in the form of viscous liquids, pastes or powders.
I may use distillers' yeast or brewers' yeast. If distillers' yeast be used, it
is thoroughly washed, sifted and filter pressed. If brewers' yeast be used, it is
washed in weak lime water and filter pressed.
The yeast to be treated is divided into three approximately equal portions each
of which is treated as follows:-
Portion I is digested for about 24 hours at a temperature of 120° to 140° Fahr.
in an equal weight of a weak solution of lactic acid, for which hydrochloric acid
may be substituted, or a solution of caustic potash or soda.
A suitable strength of solution is about 0.1 per cent. and the digestion is best
effected in vessels provided with suitable heating and agitating arrangements.
The product of this treatment, which I may term product A, contains albu-
minates and other nutritious substances.
Portion II is digested for 6 hours at a temperature of 100° Fahr. with an
aqueous solution containing 0'2 per cent. of hydrochloric acid and about
20 per cent. of pepsine and the albumoses, peptones and para peptone that are
formed along with other soluble matters are filtered off, constituting what I may
term product B.
Portion III. is made alkaline by the addition of an equal weight of a weak
solution of sodium carbonate, and digested for 6 hours at a temperature of
100° Fahr. with a glycerine extract of ox or sheep pancreas and the peptones,
albumoses and other extracts which are formed, are filtered off, constituting what
I may term product C. Five per cent. by weight of the alkaline mixture is a con-
venient proportion of the glycerine extract to use for the digestion.
The glycerine extract of pancreas above mentioned is prepared as follows:-
The fresh pancreas, preferably from oxen, is placed in a shallow vessel,
covered with a damp cloth and allowed to stand for 12 to 24 hours.
It is them finely minced and mixed with four times its weight of glycerine
and allowed to stand for 48 hours, the glycerine extract is then strained off and
stored in stoppered bottles.
The solid residue left after filtration of Portion III may be subjected to the
same treatment as Portion II and the residue left after filtration of Portion II
may have the same treatment as Portion III.
The several products A, B and C obtained as above described may be concentrated
to any desired consistence by evaporation in vacuo, and may be used separately
as articles of food; or any two of them or all may be mixed either before or after
their concentration, in any desired proportions. The products may be reduced to
the form of powders by drying the concentrated material at a temperature not
exceeding 150° Fahr. and pulverising.

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I wish it to be understood
that I am aware of Kressels Specification No. 15885 of 1895 and I claim nothing
described or claimed therein, but I declare that what I claim is:
1. The herein described manufacture of a nutritious product from yeast herein-
before designated as product A.
2. The herein described manufacture of a nutritious product from yeast herein-
before designated as product B.
3. The herein described manufacture of a nutritious product from yeast herein-
before designated as product C.
4. As articles of food the several products A, B and C either alone or in any
admixture.
ABEL & IMRAY,
Agents for the Applicant.