IMPROVEMENTS IN THE MANUFACTURE OF INDIA- RUBBER WASHERS OR PACKING PIECES
Year: 1874

page_text: LETTERS PATENT to James Georgo Ingram, of Wilmer Gardens,
Hoxton, in the County of Middlesex, India-rubber Manufacturer,
for the Invention of "IMPROVEMENTS IN THE MANUFACTURE OF INDIA-
RUBBER WASHERS OR PACKING PIECES."
- PROVISIONAL SPECIFICATION left by the said James George Ingram
at the Office of the Commissioners of Patents, with his Petition,.
on the 10th August 1874.
"
I, JAMES GEORGE INGRAM, of Wilmer Gardens, Hoxton, in the
County of Middlesex, India-rubber Manufacturer, do hereby declare the
nature of the said Invention for " IMPROVEMENTS IN THE MANUFACTURE OF
INDIA-RUBBER WASHERS OR PACKING PIECES," to be as follows:-
The Invention has for its object improvements in the manufacture of
india-rubber washers or packing pieces, and relates to a novel mode of
manufacture, whereby a more durable, more effective, and cheaper
article is produced than heretofore. Hitherto such articles have been
produced by combining alternate layers of canvas and india-rubber in a
horizontal direction, or in the direction of the plane of such washers or
packing pieces. Now this mode of manufacture is troublesome and
wasteful of material, and therefore expensive.

page_text: In carrying my Invention into effect I wrap around a mandril of any
desired sizo alternate layers of india-rubber and canvas or other fabric
until the required thickness is produced, thereby producing a tube in
the cross section of which the india-rubbor and cloth or canvas alternate.
This tubo is then cut up so as to produce washers or packing pieces of t
any desired thickness.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said James George Ingram in the Great Seal Patent
Office on the 10th February 1875.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JAMES
GEORGE INGRAM, of Wilmer Gardens, Hoxton, in the County of
Middlesex, India-rubber Manufacturer, 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-four, in the thirty-
eighth year of Her reign, did, for Herself, Her heirs and successors, give
and grant unto me, the said James George Ingram, Her special license
that I, the said James George Ingram, my executors, administrators,
and assigns, or such others as I, the said James George Ingram, my
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
THE MANUFACTURE OF INDIA-RUBBER WASHERS OR PACKING PIECES," upon the
condition (amongst others) that I, the said James George Ingram, my
executors or administrators, by an instrument in writing under my,
or their, or one of their hands and scals, 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 Scal
Patent Office within six calendar months next and immediately after
the date of tho said Letters Patent.
NOW KNOW YE, that I, the said James George Ingram, do hereby
doclave the nature of the said Trubis

page_text: is to be performed, to be particularly described and ascertained in and
by the following statement thereof, that is to say:-
The Invention has for its object improvements in the manufacture
of india-rubber washers or packing pieces, and relates to a novel modo
of manufacture, whereby a more durable, more effective, and cheaper
article is produced than when such articles are manufactured by the
processes heretofore adopted. Hitherto such articles have been produced
by combining alternate layers of canvas and india-rubber in a horizontal
direction, or in the direction of the plane of such washers or packing
pieces. Now this mode of manufacture is troublesome and wasteful of
material, and therefore expensive, as by such mode of manufacture it is
necessary either first to cut out the materials to the form required, and
then to vulcanise them in moulds, or to manufacture sheets of material
which are afterwards cut to the forms required.
In carrying my Invention into effect I wrap around a mandril of any
desired size layers of india-rubber and canvas in any desired alternation
until the required thickness is produced, taking care to have a good body
of india-rubber on both the inside and outside of the said tube, thus
producing a tube in the cross section of which the layers of india-rubber
and cloth or canvas alternate. This tube is then cut up crosswise into
slices so as to produce washers or packing pieces of any desired thickness,
in which the layers of india-rubber and canvas, instead of alternating
in horizontal lines, are disposed in layers around the washers or packing
pieces.
Having thus described the nature of my said Invention, and the mode
in which I carry the same into effect, I would have it understood that
what I claim is, the improved mode of manufacturing india-rubber
washers or packing pieces substantially as herein described.
In witness whereof, I, the said James George Ingram, have here-
unto set my hand and seal, this Tenth day of February, in
on of our Lord One thousand eight hundred and seventy