IMPROVEMENTS IN PACKING FOR THE PISTON RODS OF STEAM ENGINES, AND OF PUMPS FOR RAISING OR FORCING HOT FLUIDS, ACIDS, AND OTHER CORROSIVE MATTERS, WHICH IMPROVEMENTS ARE ALSO APPLICABLE TO THE PACKING OF THE STUPPING BOXES OR GLANDS OF THE SPINDLES OR AXES OF COCKS OR VALVES USED FOR THE PASSAGE OF STEAM, HOT FLUIDS, OR ACIDS
Year: 1866

page_text: LETTERS PATENT to James Barwick and Samuel Tindall, both of Silver-
town, in the County of Essex, for the Invention of "IMPROVEMENTS IN
PACKING FOR THE PISTON RODS OF STEAM ENGINES, AND OF PUMPS FOR RAISING
OR FORCING HOT FLUIDS, ACIDS, AND OTHER CORROSIVE MATTERS, WHICH
IMPROVEMENTS ARE ALSO APPLICABLE TO THE PACKING OF THE STUPPING BOXES
OR GLANDS OF THE SPINDLES OR AXES OF COCKS OR VALVES USED FOR THE
PASSAGE OF STEAM, HOT FLUIDS, OR ACIDS."
Sealed the 21st May 1867, and dated the 5th December 1866.
PROVISIONAL SPECIFICATION left by the said James Barwick and
Samuel Tindall at the Office of the Commissioners of Patents, with their
Petition, on the 5th December 1866.
We, JAMES BARWICK and SAMUEL TINDALL, both of Silvertown, in the
County of Essex, do hereby declare the nature of the said Invention for.
"IMPROVEMENTS IN PACKING FOR THE PISTON RODS OF STEAM ENGINES, AND OF
PUMPS FOR RAISING OR FORCING HOT FLUIDS, ACIDS, AND OTHER CORROSIVE
MATTERS, WHICH IMPROVEMENTS ARE ALSO APPLICABLE TO THE PACKING OF THE
STUFFING BOXES OR GLANDS OF THE SPINDLES OR AXES OF COCKS OR VALVES USED
FOR THE PASSAGE OF STRAM, HOT FLUIDS, OR ACIDS," to be as follows:→
In carrying out our improvements we take hard india-rubber, such as that
commonly called ebonite or vulcanite, reduced to dust, shavings, or small

page_text: particles, and we mix therewith oil or grease, preferring such as generally
used for lubricating purposes, and in quantity as much as it will absorb.
In applying the mixture thus obtained we first bind round the piston rod or
other spindle in the stuffing box or gland a small quantity of gaskin or spun
yarn, or other suitable fibrous matter; upon this we apply a layer of the
mixture, then a layer of tow or other fibrous substance, then another layer of
the mixture, and then another layer of the tow or other fibrous substance, and
so on until the desired quantity of packing has been obtained. In re-applying
the mixture to glands or stuffing boxes that have been in use packed in this
way, but which require fresh packing, we in place of removing such old
packing, or the whole of it, apply the mixture on such old packing.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said James Barwick and Samuel Tindall in the Great Seal
Patent Office on the 4th June 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JAMES
BARWICK and SAMUEL TINDALL, both of Silvertown, in the County of Essex,
send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Fifth day of December, in the year of our Lord
One thousand eight hundred and sixty-six, in the thirtieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto us,
the said James Barwick and Samuel Tindall, Her special licence that we,
the said James Barwick and Samuel Tindall, our executors, administrators,
and assigns, or such others as we, the said James Barwick and Samuel
Tindall, 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 "IMPROVEMENTS. IN
PACKING FOR THE PISTON RODS OF STEAM ENGINES, AND OF PUMPS FOR RAISING OR
FORCING HOT FLUIDS, ACIDS, AND OTHER CORROSIVE MATTERS, WHICH IMPROVEMENTS.
ARE ALSO APPLICABLE TO THE PACKING OF THE STUFFING BOXES OR GLANDS OF THE
SPINDLES OR AXES OF COCKS OR VALVES USED FOR THE PASSAGE OF STEAM, HOT
FLUIDS, OR ACIDS," upon the condition (amongst others) that we, the said,

page_text: James Barwick and Samuel Tindall, our executors or 'administrators, by an
instrument in writing under our or their hands and seals, or under the hand
and seal of one of us or them, 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 James Barwick and Samuel Tindall,
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':―
The improvements relate to the use of hard india-rubber, such as that
commonly called ebonite or vulcanite, mixed with oil or grease.
In carrying out our improvements we prefer that the hard india-rubber
used be reduced to dust or shavings, or other small particles, and the grease or
oil mixed therewith we prefer to be such as generally used for lubricating
purposes, and in quantity as a rule about as much as the india-rubber will
absorb..
In applying the mixture thus obtained we according to one method first
bind round the piston rod or other spindle in the stuffing box or gland a small
quantity of gaskin or spun yarn, or other suitable fibrous matter; upon this
we apply a layer of the mixture, then a layer of tow or other fibrous substance,
then another layer of the mixture, and then another layer of the tow or other
fibrous substance, and so on until the desired quantity of packing has been
obtained. In re-applying the mixture to glands or stuffing boxes that have
been in use packed in this way, but which require fresh packing, we some-
times in place of removing such old packing or the whole of it apply the
mixture on such old packing.
According to another method we form tubes or cases of coarse linen or
other suitable material, which we fill with the mixture, and such tubing so
filled we apply in the glands or other packing in coils rammed tight around
the piston rod or other spindle, to be there held in position by the cap of the
gland or other packing. This method of applying the mixture will be found
very convenient in practice. The tubes or cases may be of varying sizes to
suit the different sizes of glands to which the mixture is to be applied.
Having thus described our Invention, and means which we adopt in
carrying the same into effect, we would have it understood that we do not
confine ourselves to the precise means for applying the same as described, so

page_text: long as the peculiar character of the Invention be retained, substantially as
explained.
In witness whereof, we, the said James Barwick and Samuel Tindall,
have hereunto set our hands and seals, this Third day of June, in the
year of our Lord One thousand eight hundred and sixty-seven.
JAMES BARWICK.
(L.8.)
SAMUEL TINDALL. (L.S.)