Improvements in the Manufacture of Yeast.
Year: 1892

page_text: Date of Application, 27th May, 1892
Complete Specification Left, 27th Mar., 1893-Accepted. 29th Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Yeast.
1, HENRY MYERS of Low Moor Bradford Yorkshire, Yeast Manufacturer, do
hereby declare the nature of this invention to be as follows:-
To each cwt. I take 80 per cent. of ground rye, 10 per cent. each, malted and
ground wheat, & rye, mix with 75 gal. of water at 165 to 170 Far. according to
weather, add one 32nd. per cent. of sulphuric acid, and same proportion of Epsom
salts, each well diluted with cold water, also a small percentage of costic lime water,
after standing from 8 to 10 hours is cooled down by means of a copper coil to
80 Far. and with the addition of 5 cwt. of pressed brewers yeast being mixed and
desolved then by gravitating to fermenting vat the temprature is further reduced,
and on being bro't up again by a hot water coil and kept at 80 Far. during the
whole period of fermenting.
After the solution has stood a few hours a head of yeast will rise, fermentation
being assisted by a few jets of compressed air being blown into bottom of vat, when
a sufficient head of yeast has risen it may be skimmed from time to time, and being
mixed with iced cold water is run down and sieved into yeast vats.
After standing a few hours the top water is drawn off, and fresh water added,
and again well mixed to wash and cleanse the yeast before precipitating ready for
pressing in the usual way.
.
Dated this 24th June 1892.
HENRY MYERS,
Low Moor, Bradford.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Yeast.
I, HENRY MYERS, of Salroyd Low Moor, near Bradford, in the County of
York, Yeast Maker, 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 :-
The object of my invention is to produce yeåst in such a manner that, it will
retain its qualities for baking bread and other purposes for a considerable time, and
to so compound the same that it may be utilized for the fermentation of distillers
worts.
1 accomplish my object in the following manner :-For each one hundred pounds
in weight of the first compound used in the manufacture of my improved yeast, I
take eighty pounds of ground rye, ten pounds of malted ground wheat and a like
amount of malted ground rye; these are mixed with seventy five gallons of water
heated to a temperature of one hundred and sixty five to one hundred and seventy
degrees Fahrenheit, according to the normal temperature of the atmosphere, the
latter degree being preferable in cold weather.
To the above is now added one thirty second per cent. of sulphuric acid along
with the same proportion of Epsom salts, each diluted with cold water, and after
standing from eight to ten hours at the above named temperature, it is cooled down
to about eighty degrees, Fahrenheit, and run into a vat containing five hundred
weight of pressed brewers yeast with which it is thoroughly amalgamated and the
temperature retained at about eighty degrees during the period of fermentation.
After the solution has stood a few hours in this fermenting vat, a head of yeast
begins to rise, the fermentation being assisted by a few jets of compressed air being

page_text: injected into the solution at or near to the bottom of the vat, and when a sufficient
head of yeast has risen, the same may from time to time be skimmed therefrom and
mixed with iced cold water for washing and clearing the yeast of impurities.
The yeast is then passed through a sieve into a vessel and to some extent allowed
to precipitate, the top water being drawn off and fresh water from time to time
added for the purpose of clearing the yeast before it is pressed in any convenient or
ordinary manner and made ready for use.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same may be performed, I declare that what I
claim is:
The within named method or process of manufacturing yeast by compounding the
ingredients substantially in the manner as hereinbefore set forth.
Dated this 25th day of March 1893.
JOHN WAUGH,
Agent.