AN IMPROVED PROCESS OF HARDENING CAST-IRON CAPS USED IN MACHINERY FOR SPINNING AND DOUBLING WOOL, COTTON, SILK, FLAX, MOHAIR, AND OTHER FIBROUS SUBSTANCES
Year: 1860

page_text: LETTERS PATENT to William Smith and Prince Smith, both of Keighley.
in the County of York, Machine Makers, for the Iuvention of "AN
IMPROVED PROCESS OF HARDENING CAST-IRON CAPS USED IN MACHINERY FOR
SPINNING AND DOUBLING WOOL, COTTON, SILK, FLAX, MOHAIR, AND OTHER
FIBROUS SUBSTANCES."
Sealed the 22nd June 1860, and dated the 18th January 1860.
PROVISIONAL SPECIFICATON left by the said William Smith and Prince
Smith at the Office of the Commissioners of Patents, with their Petition,
on the 18th January 1860.
We, WILLIAM SMITH and PRINCE SMITH, both of Keighley, in the County
of York, Machine Makers, do hereby declare the nature of the said Invention
for "AN IMPROVED PROCESS OF HARDENING CAST-IRON CAPS USED IN MACHINERY
FOR SPINNING AND DOUBLING WOOL, COTTON, SILK, FLAX, MOHAIR, AND OTHER
FIBROUS SUBSTANCES," to be as follows:-
This Invention applies to a certain part of the apparatus used in spinning
and doubling machinery known as the "spindle cap," which consists of a
cylinder or cone of cast iron polished externally, and placed on the spindle.
These caps, in consequence of their being made of cast iron, have hitherto
been extremely liable to break or crack from a blow or fall, and were then
entirely useless, and were constantly requiring to be renewed, thereby entailing
great expense. This Invention is intended to remedy this defect, and consists
of a process of hardening such cast-iron "spindle caps" by heating them to a
red heat, and then putting them into cold water mixed with common salt

page_text: (chloride of sodium). We would here remark, that other chemical agents
possessing similar qualities may be employed in place of the chloride of
sodium, but the latter from its answering the purpose extremely well, and
being also inexpensive, is preferred.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said William Smith and Prince Smith in the Great Seal Patent
Office on the 18th July 1860.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, WILLIAM
SMITH and PRINCE SMITII, both of Keighley, in the County of York, Machine
Makers, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Eighteenth day of January in the year of our
Lord One thousand eight hundred and sixty, in the twenty-third year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
us, the said William Smith and Prince Smith, Her special licence that we
the said William Smith and Prince Smith, our executors, administrators. and
assigns, or such others as we, the said William Smith and Prince Smith,
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, use, exercise, and vend,
within the United Kingdom of Great Britain and Ireland, the Channel
Islands, and Isle of Man, an Invention for "AN IMPROVED PROCESS OF
HARDENING-CAST-IRON-CAPS-USED-IN-MACHINERY-FOR-SPINNING AND DOUBLING
WOOL, COTTON, SILK, FLAX, MOHAIR, AND OTHER FIBROUS SUBSTANCES," upon the
condition (amongst others) that we, the said William Smith and Prince
Smith, our executors or administrators, by an instrument in writing under
our or one of our, or their or one of their, hands and seals, should par-
ticularly 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
immediately after the date of the said Letters Patent.
NOW KNOW, YE, that we, the said William Smith and. Prince Smith,
do hereby declare the nature of our said Invention, and in what manner
the same is to be performed, to be particularly described and ascertained in
and by the following statement in writing, that is to say) :-
This Invention applies to a certain part of the apparatus used in spinning

page_text: and doubling machinery, known as the "spindle cap," which consists of a
cylinder or cone of cast iron, polished externally, and placed on the spindle.
These caps, in consequence of their being made of cast iron, have hitherto
been extremely liable to be bruised or damaged by a blow or fall, and were
then entirely useless, and were constantly requiring to be renewed, thereby
entailing great expense. This Invention is intended to remedy this defect,
and consists of a process of hardening such cast-iron "spindle caps" by
heating them to a red heat, and then putting them into cold water mixed
with common salt (chloride of sodium). We would here remark, that other
chemical agents possessing similar qualities may be employed in place of the
chloride of sodium, but the latter, from its answering the purpose extremely
well, and being also inexpensive, is preferred. We may also observe, that
plunging the heated cast-iron "spindle caps" into cold water without the
addition of any chemical agent whatever will have the effect of hardening
them, but not so thoroughly or effectually as when chloride of sodium or other
chemical salt possessing the same or other similar qualities is employed.
Having now described the nature and object of our said Invention for
"An Improved Process of Hardening Cast-iron Caps used in Machinery for
Spinning and Doubling Wool, Cotton, Silk, Flax, Mohair, and other Fibrous
Substances," together with the manner in which the same is to be performed,
we would remark, in conclusion, that we claim as our Invention the method
or process of bardening cast-iron spindle caps, by heating them to a red heat,
and then plunging the same into cold water, either with or without the addition
of chloride of sodium or other suitable chemical salt..
In witness whereof, we, the said William Smith and Prince Smith,
have hereunto set our hands and seals, the Fourteenth day of July,
in the year of our Lord One thousand eight hundred and sixty.
Signed, sealed, and delivered, by the
above-named William Smith and
Prince Smith, in the presence of
WILLIAM SMITH. (L.S.)
PRINCE SMITH.
(L.S.)
Signed, sealed, and delivered, by the
above-named William Smith and
Prince Smith, in the presence of
JOSEPH TATTERSFIELD,
WILLIAM SMITH. (L.S.)
PRINCE SMITH.
(L.S.)
Clerk to Messrs. Weatherhead & Burr,
Solicitors, Keighley.