IMPROVEMENTS IN PACKING FOR PISTON, VALVE, PUMP, OR OTHER SUCH RODS OR SPINDLES
Year: 1866

page_text: LETTERS PATENT to John Coates, of Pendleton, Manchester, in the
... County of Lancaster, Engineer, for the Invention of "IMPROVEMENTS IN
PACKING FOR PISTON, VALVE, PUMP, OR OTHER SUCH RODS OR SPINDLES."
Sealed the 12th April 1867, and dated the. 17th October 1866.
PROVISIONAL SPECIFICATION left by the said John Coates at the
Office of the Commissioners of Patents, with his Petition, on the
17th October 1866.1
I, JOHN COATES, of Pendleton, Manchester, in, the County of Lancaster,
Engineer, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN PACKING FOR PISTON, VALVE, PUMP, OR OTHER SUCH RODS OR SPINDLES,"
to be as follows:-
My Invention consists in pressing hemp or other fibrous material into
form so as to fit the stuffing box and rod or spindle. before it is applied
> thereto.
In carrying out my Invention. I take hemp or other fibrous material and
saturate it with tallow, soap, or other such suitable substance, and I then
place it in a mould, and by pressure form it into a ring to fit the form of the
stuffing box and rod. I propose, when necessary, to slit these rings to allow
of their being adapted to the rod or spindle, and to employ two or more of
them placed on each other, the line of slits being broken.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Coates in the Great Seal Patent Office on the
17th April 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
COATES, of Pendleton, Manchester, in the County of Lancaster, Engineer,
send greeting.
WHEREAS Her most Excellent. Majesty Queen Victoria, by Her Letters
Patent, bearing date the Seventeenth day of October, 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
me, the said John Coates, Her special license that I, the said John
Coates, my executors, administrators, and assigns, or such others as I, the
said John Coates, 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 "Im-
PROVEMENTS IN PACKING FOR PISTON, VALVE, PUMP, OR OTHER SUCH RODS OR
SPINDLES," upon the condition (amongst others) that I, the said John
Coates, by an instrument in writing under my hand and seal, 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 immediately after the date of the said Letters Patent.
NOW KNOW YE, that I; the said John Coates, do hereby declare
the nature of my said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the fol-
lowing statement (that is to say :-
My Invention consists in pressing hemp; tow, cotton, or other fibrous
inaterial into form so as to fit the stuffing box before it is applied thereto;
and with this fibrous material I apply tallow, soap, or other such suitable
known lubricating substances. The fibrous material in the first place I
saturate with the lubricating substance, and then placé 'the mass in a mould
of the desired shape for the packing, such mould having a core for forming
the aperture through which the piston rod, for instance, shall pass; a plunger
is then forced by a lever, screw, or other ordinary means into the said mould,
and by these means an annular mass of packing and lubricating material is
formed, which is placed in the usual stuffing box, and may be screwed down

page_text: by the gland. In cases where the packing formed as above cannot be placed
in the stuffing box as a solid ring, in consequence of the obstruction of a cross
head or other such part, I slit the said ring so that it may be opened to admit
the rod which it is intended to pack.
Packing made as above may be in lengths in which it is intended to be
applied, or in greater lengths to be afterwards cut up as desired, and it may
be adapted to the stuffing box in one length or in several superimposed; in
the latter the case the above-mentioned slits, if any, are placed in different
lines around the circle in order to break the joint.
Having thus described and ascertained the nature of my said Invention,
and the manner in which the same is to be performed, I desire to be under-
stood that I claim as secured to me under the above in part recited Letters
Patent the use of packing formed into the required shape before it is applied
to the part to be packed by pressing fibrous and lubricating materials in
moulds.
In witness whereof, I, the said John Coates, have hereunto set my
hand and seal, this Sixteenth day of April, in the year of our Lord
One thousand eight hundred and sixty-seven.