IMPROVEMENTS IN DRESSING AND CLEANSING MILL- STONES, AND IN MATERIALS EMPLOYED THEREIN
Year: 1871

page_text: LETTERS PATENT to Augustus Bryant Childs and David Munroc
Childs, of No. 16, Mark Lane, in the City of London, Engineers,
for the Invention of "IMPROVEMENTS IN DRESSING AND CLEANSING MILL-
STONES, AND IN MATERIALS EMPLOYED THEREIN."-Partly a communication
from abroad by John W. Fry, of Nashville, Tennessee, in the
United States of America.
Sealed the 23rd January 1872, and dated the 10th August 1871.
PROVISIONAL SPECIFICATION left by the said Augustus Bryant Childs
and David Munroe Childs at the Office of the Commissioners of
Patents, with their Petition, on the 10th August 1871.
We, AUGUSTUS BRYANT CHILDS and DAVID MUNROE CHILDS, of
No. 16, Mark Lane, in the City of London, Engineers, do hereby declare
the nature of the said Invention for "IMPROVEMENTS IN DRESSING AND
CLEANSING MILLSTONES, AND IN MATERIALS EMPLOYED THEREIN," (which said
Invention is the result partly of a communication to us from abroad
by John W. Fry, of Nashville, Tennessee, in the United States of

page_text: America, and partly of Invention and discovery made by us,) to be
as follows:
Our Invention for dressing or cleansing a pair of millstones, and
which are also known as mill burrs, is as follows:-To the proportion of
about one pint of warm water we add two ounces of finely pulverized
salsola soda, two ounces of finely pulverized borax, two ounces of finely
pulverized carbonate of ammonia, and one ounce of finely pulverized
common alum; after this compound has been stirred until the ingre-
dients are dissolved, we slowly and carefully pour therein from about
half an ounce to one liquid ounce of muriatic or chlorohydric acid, or of
strong cider vinegar, or of acetic acid, according to the strength of the
compound required. All dust and grit is then cleared off the working
surfaces of the millstones and some fine clean sand sprinkled thereon, and
such surfaces, having been well wetted with the compound by means of
a sponge or other soft material, are thoroughly scrubbed with a hard
brush and afterwards cleansed or washed with warm or cold water,
and rubbed dry and clean, and the millstones thus prepared are ready
for cracking or dressing if desired.
And as a modification of the above process we sometimes add to the
proportion of about one pint of warm water two ounces of finely pul-
verized salsola soda, two ounces of finely pulverized borax, two ounces
of carbonate of ammonia, one ounce of saleratus or carbonate of potash;
and after those ingredients have been stirred until they are dissolved,
we pour therein slowly and carefully from half an ounce to one ounce
of muriatic or chlorohydric acid, or of strong cider vinegar, or of acetic
acid; if this modification be used it will be better that the working
surfaces of the millstones be thoroughly wetted with this compound
and then rubbed dry with some soft material, and the millstones then
allowed to stand for some hours until thoroughly dry, say, from ten to
twenty-four hours, and after being staffed if any raised spots remain they
should be removed with the ordinary mill bill or pick, and the millstones
are then ready for grinding.
And also as a modification of our process we sometimes use a strong
solution in the proportion of about two pounds of carbonate of soda, or
of carbonate of ammonia, or of carbonate of potash, or their respective
compounds, to a gallon of water, but we prefer the solution of carbonate
of soda in water, and in some cases we use for the purposes above men-
tioned the solution in water of two or more of those alkalies in combination

page_text: in about equal quantities, and in some cases we use for the like purposes
a solution in water of carbonate of soda and tungstate of soda, or car-
bonate of soda and silicate of soda in combination, in the proportions
of about ten to twenty of the tungstate or of silicate to one hundred
of either of the carbonates.
We have stated the chemical ingredients as known in commerce of
which the compositions can be made, and the mode we usually apply
them, but as in chemistry there are so many known equivalents for
the several ingredients we claim the right to substitute any one or
more of such known equivalents for any one or more of the ingredients
we have specified, and also to increase or decrease the quantities of any
one or more of such ingredients used in such compositions or either of
them, as the strengths of the ingredients as purchased greatly vary.
The above mentioned compositions and processes are applicable for
dressing new millstones, and also for cleansing and dressing those which
have been used for grinding.
SPECIFICATION in pursuance of the conditions of the Letters Patcut,
filed by the said Augustus Bryant Childs and David Munroe
Childs in the Great Seal Patent Office on the 10th February
1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, AUGUSTUS
BRYANT CHILDS and DAVID MUNROE CHILDS, of No. 16, Mark Lane, in
the City of London, Engineers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Tenth day of August, in the year of
our Lord One thousand eight hundred and seventy-one, in the thirty-
fifth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto us, the said Augustus Bryant Childs and David Munroe
Childs, Her special licence that we, the said Augustus Bryant Childs,
and David Munroe Childs, our executors, administrators, and assigns, or
such others as we, the said Augustus Bryant Childs and David Munroe
Childs, our executors, administrators, and assigns, should at any time
agree with, and no others, from time to time and at all times thereafter
during the term therein expressed, should and lawfully might make,

page_text: 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 DRESSING AND CLEANSING MILLSTONES, AND IN MATERIALS
EMPLOYED THEREIN," (the result partly of a communication to us from
abroad by John W. Fry, of Nashville, Tennessee, in the United States
of America, and partly of Invention and discovery made by us) upon
the condition (amongst others) that we, the said Augustus Bryant
Childs and David Munroe Childs, our executors or administrators, by
an instrument in writing under our, 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 per-
formed, and cause the same to be filed in the Great Seal Patent Office
within six calendar months next and immediately after the date of the
said Letters Patent.
NOW KNOW YE, that we, the said Augustus Bryant Childs and
David Munroe Childs, do hereby declare the nature of our said Inven-
tion, and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement :-
Our Invention for dressing or cleansing a pair of millstones, and
which are also known as mill burrs, is as follows:-To the proportion of
about one pint of warm water we and two ounces of finely pulverized
salsola soda, two ounces of finely pulverized borax, two ounces of finely
pulverized carbonate of ammonia, and one ounce of finely pulverized
common alum; after this compound has been stirred until the ingre-
dients are dissolved, we slowly and carefully pour therein from about
half an ounce to one liquid ounce of muriatic or chlorohydric acid, or
of strong cider vinegar, or of acetic acid, according to the strength of
the compound required. All dust and grit is then cleared off the
working surfaces of the millstones and some fine clean sand sprinkled
thereon, and such surfaces having been well wetted with the compound
by means of a sponge or other soft material are thoroughly scrubbed
with a hard brush, and afterwards cleansed or washed with warm or
cold water and rubbed dry and clean, and the millstones thus prepared
are ready for cracking or dressing if desired.
And as a modification of the above process we sometimes add to the
proportion of about one pint of warm water two ounces of finely pul-
verized salsola soda, two ounces of finely pulverized borax, two ounces

page_text: of carbonate of ammonia, one ounce of saleratus or carbonate of potash;
and after those ingredients have been stirred until they are dissolved
we pour therein slowly and carefully from half an ounce to one ounce
of muriatic or chlorohydric acid, or of strong cider vinegar, or of acetic
acid; if this modification be used it will be better that the working
surfaces of the millstones be thoroughly wetted with this compound
and then rubbed dry with some soft material, and the millstones then
allowed to stand for some hours until thoroughly dry, say, from ten to
twenty-four hours, and after being staffed, if any raised spots remain
they should be removed with the ordinary mill bill or pick, and the
millstones are then ready for grinding.
And also as a modification of our process we sometimes use a strong
solution in the proportion of about two pounds of carbonate of soda, or
of carbonate of ammonia, or of carbonate of potash, or their respective
compounds, to a gallon of water, but we prefer the solution of carbonate
of soda in water, and in some cases we use for the purposes above
mentioned the solution in water of two or more of those alkalies in
combination in about equal quantities, and in some cases we use for the
like purposes a solution in water of carbonate of soda and tungstate of
soda, or carbonate of soda and silicate of soda in combination, in the
proportions of about ten to twenty of the tungstate or of silicate to
one hundred of either of the carbonates.
We have stated the chemical ingredients as known in commerce of
which the compositions can be made, and the mode we usually apply
them, but as in chemistry there are so many known equivalents for
the several ingredients, we claim the right to substitute any one or
more of such known equivalents for any one or more of the ingre-
dients we have specified, and also to increase or decrease the quantities
of any one or more of such ingredients used in such compositions or
either of them, as the strengths of the ingredients as purchased greatly
vary.
The above mentioned compositions and processes are applicable for
dressing new millstones and also for cleansing and dressing those which
have been used for grinding.
Having described the nature of our said Invention, and in what
manner the same can or may be performed, we wish it to be understood
that we do not claim any of the ingredients taken separately, but we

page_text: claim as our Invention, the compositions and processes substantially as
herein-before described.
In witness whereof, we, the said Augustus Bryant Childs and
David Munroe Childs, have hereunto set our hands and seals,
the Tenth day of February One thousand eight hundred and
seventy-two.