IMPROVEMENTS IN DESICCATING AND PRESERVING POTATOES
Year: 1869

page_text: LETTERS PATENT to John Windsor, of Pubrose Mill, Braddan, in
the Isle of Man, Miller, for the Invention of "IMPROVEMENTS IN
DESICCATING AND PRESERVING POTATOES."
Sealed the 28th January 1870, and dated the 22nd September 1869.
PROVISIONAL SPECIFICATION left by the said John Windsor at the
Office of the Commissioners of Patents, with his Petition, on tho
22nd September 1869.
I, JOHN WINDSOR, of Pubrose Mill, Braddan, in the Isle of Man,
5 Miller, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN DESICCATING AND PRESERVING POTATOES," to be as follows:-
This Invention relates to the process of preserving and desiccating
potatoes by means of hot air.
In the ordinary well known process potatoes have been prepared on
hot iron tables with steam passing underneath, or on wire sieves by hot
air travelling through nearly red hot iron pipes. Hitherto in known
processes for the purpose when hot air is used the hot air has passed
through or over metallic pipes or surfaces, whereby a very disagreeable
metallic taste has been imparted to the potatoe.

page_text: Now the object of my Invention is to remedy this evil and to obviate
the metallic flavour above referred to.
My Invention relates to the desiccating or preserving of potatoes
solely or in part by the hot air process, and it consists in passing the air
used in such process through or over charcoal placed in the hot air
chambers or channels or in other place or way, so disposed that the air
shall be caused to pass through or over the charcoal while passing along
or after it has left the pipes or surfaces by which it is heated and before
it comes into contact with the potatoes. By these means the potatoes
treated by the hot air thus purified are preserved from prejudicial metallic
flavour.
In carrying my Invention into effect the following mode may be
pursued:-I place the charcoal in iron frames or other recipient fixed in
the channel or channels through which the air is to pass. The hot air
is then forced through or over the charcoal after it has left the iron
surfaces by which the air is heated. I obtain the necessary pressure for
the purpose by blast fans, which force the air in one continuous stream
through the hot pipes and through or over the charcoal, which purifies
it or divests it of metallic flavour. After this it comes in contact with
the potatoes to be acted upon.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said John Windsor in the Great Seal Patent Office on
the 22nd March 1870.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
WINDSOR, of Pubrose Mill, Braddan, in the Isle of Man, Miller, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-second day of September, in the
year of our Lord One thousand eight hundred and sixty-nine, in the
thirty-third year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said John Windsor, Her special licence, that
I, the said John Windsor, my executors, administrators, and assigns,
or such others as I, the said John Windsor, my executors, administrators,
and assigns, should at any time agree with, and no others, from time to

page_text: 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 DESICCATING AND PRESERVING
POTATOES," upon the condition (amongst others) that I, the said John
Windsor, my executors or administrators, by an instrument in writing
under my, or their, or one of their hands and seals, should particularly
describe and ascertain 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 imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said John Windsor, 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:-
This Invention relates to the process of preserving and desiccating
potatoes by means of hot air.
In the ordinary well-known process potatoes have been prepared on
hot iron tables with steam passing underneath, or on wire sieves by hot
air travelling through nearly red hot iron pipes. Hitherto in known
processes for the purpose when hot air is used the hot air has passed
through metallic pipes or over metallic surfaces, whereby a very dis-
agreeable metallic taste has been imparted to the potatoes.
Now the object of my Invention is to remedy this evil and to obviate
the metallic flavour above referred to.
My Invention relates to the desiccating or preserving of potatoes
solely or in part by the hot air process, and it consists in passing the air
used in such process through or over charcoal placed in the hot air
chambers or channels or in other place or way, so disposed that the
air shall be caused to pass through or over the charcoal while such air
is passing along or after it has left the pipes or surfaces by which it is
heated and before it comes into contact with the potatoes. By these
means the potatoes treated by the hot air thus purified are preserved
from prejudicial metallic flavour.
In carrying my Invention into effect the following mode may be best
pursued:-I place charcoal in iron frames or other recipient fixed in
the channel or channels through which the air is to pass. The hot air is

page_text: then forced through or over the charcoal after it has left the metal
surfaces by which the air is heated. I obtain the necessary pressure for
the purpose by blast fans, which force the air in one continuous stream
through the hot pipes and through or over the charcoal, which purifies
the air or divests it of metallic flavour; after this it comes in contact
with the potatoes to be acted upon.
Having now described the nature of the said Invention, and in what
manner the same may be performed, I declare that I claim, passing the
air used in desiccating or preserving potatoes through or over charcoal,
substantially in the manner and for the purpose described.
In witness whereof, I, the said John Windsor, have hereunto set
my hand and seal, this Twelfth day of March, in the year of
our Lord One thousand eight hundred and seventy.
Witness,
THOMAS DAVID GIBSON.
JOHN WINDSOR. (L.S.)