IMPROVEMENTS IN PACKING FOR PISTONS, PISTON RODS, VALVES, AND OTHER USES
Year: 1854

page_text: En the Matter of a Patent granted to JOSEPH HENRY TUCK, of Pall
Mall, in the County of Middlesex, Engineer, for the Invention
of "IMPROVEMENTS IN PACKING FOR PISTONS, PISTON RODS, VALVES,
AND OTHER USES," bearing date the Twenty-fifth day of August, One
thousand eight hundred and fifty-four.
DISCLAIMER proposed to be entered by the said Joseph Henry Tuck, as
such Patentee as aforesaid, pursuant to the Statutes in that case made
and provided.
WHEREAS in my Specification to the said Letters Patent I described
packings consisting of a block or core of india-rubber surrounded or covered by
successive folds of flexible material or fabric coated or saturated with a solution
of india-rubber or other suitable composition.
And whereas it has been decided in a Court of Law that the Specification
claims the use of a flexible material with an elastic material in such manner
as to cause the former to be constantly kept in contact with the rubbing or bearing
surface by the elasticity of the latter, whether combined or not with the flexible
material in successive folds or rolls cemented around the elastic material; but
it was never my intention to make so extended a claim; for which reason, and

page_text: 6
with a view to reduce my claim of Invention to the real combination which I
claim, I hereby make the following Disclaimer; that is to say, I strike out
from the introductory paragraphs of the said Specification the words "and
I this object is accomplished," also the words "or other suitable elastic
"material," and also the words "In some cases it might be sufficient to place
the india-rubber in combination with the flexible material without the
"former being covered by the latter; I prefer that," and which Specification
so disclaimed as aforesaid will then stand as follows:-
45
166
"
"
My Invention of 'Improvements in Packing for Pistons, Piston Rods,
"Valves, and other Uses,' is intended to combine a flexible material with an
"elastic material in such a manner as to cause the former to be constantly
kept in contact with the rubbing or bearing surface by the elasticity of the
latter, by constructing the packing with a block or core of india-rubber
"surrounded or covered by folds of flexible material or fabric, the india-rubber
block or core being so placed or arranged, and of such form and size as to
"be calculated by its elasticity to keep the fabric close against the rubbing or
bearing surface during the wear of such fabric. The flexible material should
"be that of canvas, coated or saturated with a solution of india-rubber or
"other suitable composition, but this material may be varied. I also prefer
"in some cases that the block or core of india-rubber inclosed therein should
be placed or arranged within the roll of packing in a position further
" removed from the rubbing or bearing surface than the centre of such roll;
"also that the said block or core should be formed oblong or oval; but it may
"be of any convenient form, and either solid or tubular, and may be placed in
"the centre of the roll.
66
"
"In order to manufacture a roll of packing with the block or core out of
"the centre, a portion of the flexible material or fabric is folded into a roll of
"about the greatest diameter or thickness of the block or core, and the two
"bodies thus formed are folded in the remainder of the flexible material or
"fabric required to form the roll of packing. And in order to manufacture a
"roll of packing with the block or core in the centre, the flexible material or
"fabric may be simply folded upon the block or core. The above materials
"combined as described may either be employed as constituting a packing by
themselves, or they may be used for the purpose in combination with other
"suitable materials.
66
"In order, however, that my Invention may be fully understood, I will
"proceed to describe several modes of carrying it into effect represented in
"the accompanying Drawings.

page_text: "
"
"
"
Figure 1 is a section of a roll of packing, composed of a square block or
core of india-rubber A, around which is folded the flexible material or
"fabric B, thereby forming a packing square or nearly square in the cross
"section; Figure 2 represents a block or core A, with rounded corners, within
folds of flexible material or fabric B, thereby forming a circular packing;
Figure 3 is a similar representation of an oval packing. In these cases the
"elastic block or core is in the centre of the roll, the flexible material or
"fabric being merely wrapped or folded round the elastic core. Figure 4 is
a section of a roll of packing in which the elastic block or core A is out of
the centre. This packing is formed by first rolling a piece of flexible
"material into a roll C, of about the depth or greatest thickness of the elastic
"block A, and then wrapping or folding A and C in the flexible material or
"fabric B, thereby forming a square packing, the side D of which is intended
"to be kept in contact with the rubbing surface. Figure 5 represents a
packing constructed in a similar manner, but of a different form in the cross
section; Figure 6 is a section of a roll of packing with a central elastic
"core A, of a tubular form, the flexible material or fabric B being wrapped
"round it, as in Figures 1 and 2; Figure 7 represents a roll of packing
composed of a tubular elastic core A, and a roll of elastic material C, enclosed
"within folds of elastic material B in such a manner as to place the elastic
"core A out of the centre, and bring the roll C between it and the rubbing
"surface at D; Figure 8 is a similar representation of a packing with a semi-
"tubular elastic core A; Figure 9 represents a solid clastic core A, with a
"roll of elastic material B between it and the rubbing surfaco at D. It
"will be evident from these examples that the mode of combining the elastic
"block or core with the flexible material or fabric may be varied. I would
"also remark that I have not thought it necessary to explain any mode or
"modes of applying the packing, as these are well known, and my Invention
"does not relate to them; neither have I described any mode of combining
66
"
packing composed as described with other materials, as my Invention does
"not relate to any particular combination thereof, but has reference solely to
"the mode of composing the roll, which may be applied in different ways,
"and be used either by itself or in combination with other materials, as
"preferred.
66
Having thus described the nature of my Invention, and in what manner
"the same is to be performed, I would have it understood that I do not
mean or intend to confine myself to the precise forms and modes of combi-
"nation of the parts represented and described; neither do I claim as of my
46

page_text: "Invention any of the parts separately, or otherwise than as used in combi-
"nation for the purposes described; but what I do claim as of my Invention
"is, the construction of a roll of packing composed of an elastic block or core
"combined with a flexible material or fabric, as described."
In witness whereof, I, the said Joseph Henry Tuck, have hereunto set
my hand and seal, this Sixth day of March, in the year of our Lord
One thousand eight hundred and sixty.
To the Commissioners of Patents for England.
J. H. TUCK. (L.B.)
I hereby grant my fiat, giving leave to the above-named Joseph Henry
Tuck to file in the Great Seal Patent Office, with the Specification to which
the same relates, the above-written Amended Disclaimer.
Lincoln's Inn,
March 5th, 1860.
IUICHARD DETHELL, A. G.

page_text: LETTERS PATENT to Joseph Henry Tuck, of Pall Mall, in the County of
Middlesex, Engineer, for the Invention of "IMPROVEMENTS IN PACKING
T.
A Here"
PROVISIONAL SPECIFICATION left by the said Joseph Henry Tuck at
the Office of the Commissioners of Patents, with his Petition, on the
25th August 1854.
1, JOSEPH HENRY TUCK, of Pall Mall, in the County of Middlesex,
Engineer, do hereby declare the nature of the said Invention for "IMPROVE-
MENTS IN PACKING FOR PISTONS, PISTON RODS, VALVES, AND OTHER USES," to be as
follows:-
My Invention consists in constructing the packing with a block or core of
india-rubber surrounded or covered by folds of flexible material or fabric, the
india-rubber block or core being so placed or arranged, and of such formi and
size, as to be calculated, by its elasticity, to keep the fabric close against the
rubbing or bearing surface during the wear of such fabric. In some cases it
might be sufficient to place the india-rubber in combination with the flexible
material without the former being covered by the latter.
I prefer that the flexible material or fabric should be that of canvas coated

page_text: or saturated with a solution of india-rubber, but this material may be varied.
I also prefer that the block or core of india-rubber inclosed therein should be
placed or arranged within the roll of packing in a position further removed
from the rubbing or bearing surface than the centro of such roll; also, that
the said block or core should be formed oblong or oval, but it may be of any
convenient form, and either solid or tubular.
In order to manufacture a roll of packing with the block or core out of the
centre, a portion of the flexible material or fabric is folded into a roll of about
the greatest diameter or thickness of the block or core, and the two bodies thus
formed are folded in the remainder of the flexible material or fabric required
to form the roll of packing. And in order to manufacture a roll of packing
with the block or core in the centre, of the flexible material or fabric may be
simply folded upon the block or core.
The above materials combined as described may either be employed as con-
stituting a packing by themselves, or they may be used for the purpose in
combination with other suitable materials.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Joseph Henry Tuck in the Great Seal Patent Office on the
23rd February 1855.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOSEPH
HENRY TUCK, of Pall Mall, in the County of Middlesex, Engineer, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-fifth day of August, in the year of our Lord One
thousand eight hundred and fifty-four, in the eighteenth year of Her reign, did,
for Herself, Her heirs and successors, give and grant unto me, the said Joseph
Henry Tuck, Her special license that I, the said Joseph Henry Tuck, my exe-
cutors, administrators, and assigns, or such others as I, the said Joseph Henry
Tuck, my executors, administrations, 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
PISTONS, PISTON BODS, VALVES, AND OTHER USES," upon the condition (amongst
others) that I, the said Joseph Henry Tuck, by an instrument in writing

page_text: 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 Joseph Henry Tuck, 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 following
statement, reference being had to the Drawing hereunto annexed, and to the
letters and figures marked thereon (that is to say):
My Invention of "Improvements in Packing for Pistons, Piston Rods,
Valves, and other Uses," is intended to combine a flexible material with an
elastic material in such a manner as to cause the former to be constantly kept
in contact with the rubbing or bearing surface by the elasticity of the former;
and this object is accomplished by constructing the packing with a block or
core of india-rubber, or other suitable elastic material, surrounded or covered
by folds of flexible material or fabric, the india-rubber block or core being so
placed or arranged, and of such form and size, as to be calculated by its
elasticity to keep the fabric close against the rubbing or bearing surface
during the wear of such fabric. In some cases it might be sufficient to place
the india-rubber in combination with the flexible material, without the former
being covered by the latter.
I prefer that the flexible material should be that of canvas, coated or saturated
with a solution of india-rubber or other suitable composition, but this material
may be varied. I also prefer in some cases that the block or core of india-
rubber inclosed therein should be placed or arranged within the roll of packing
in a position further removed from the rubbing or bearing surface than the
centre of such roll; also, that the said block or core should be formed oblong
or oval; but it may be of any convenient form, and either solid or tubular, and
may
be placed in the centre of the roll.
In order to manufacture a roll of packing with the block or core out of the
centre, a portion of the flexible material or fabric is folded into a roll of about
the greatest diameter or thickness of the block or core, and the two bodies
thus formed are folded in the remainder of the flexible material or fabric
required to form the roll of packing. And in order to manufacture a roll of
packing with the block or core in the centre, the flexible material or fabric
may be simply folded upon the block or core.
The above materials combined as described may either be employed as con-
stituting a packing by themselves, or they may be used for the purpose in
:combination with other suitable materials.

page_text: In order, however, that my Invention may be fully understood, I will pro-
ceed to describe several modes of carrying it into effect, represented in the
accompanying Drawing.
Fig. 1 is a section of a roll of packing, composed of a squaro block or core
of india-rubber A, around which is folded the flexible material or fabric B,
thereby forming a packing square or nearly square in the cross section; Fig. 2
represents a block or core A, with rounded corners, within folds of flexible
material or fabric B, thereby forming a circular packing; Fig. 8 is a similar
representation of an oval packing. In these cases the elastic block or
core is in the centre of the roll, the flexible material or fabric being merely
wrapped or folded round the elastic core. Fig. 4 is a section of a roll of
packing in which the elastic block or core A is out of the centre. This packing
is formed by first rolling a piece of flexible material into a roll C, of about the
depth or greatest thickness-of-the-elastic block A, and then wrapping or
folding A and C in the flexible material or fabric B, thereby forming a square
packing, the side D of which is intended to be kept in contact with the rubbing
surface. Fig. 5-represents a packing constructed in a similar manner, but of
a different form in the cross section; Fig. 6 is a section of a roll of packing
with a central elastic core A, of a tubular form, the flexible material or fabric
B being wrapped round it, as in Figs. 1 and 2; Fig. 7 represents a roll of
packing composed of a tubular elastic coro A, and a roll of elastic material C,
enclosed within folds of elastic material B, in such a manner as to place the
elastic core A out of the centre, and bring the roll C between it and the
rubbing surface at D; Fig. 8 is a similar representation of a packing with a
semi-tubular elastic core A; Fig. 9 represents a solid elastic core A, with a
roll of elastic material B between it and the rubbing surface at D.
It will be evident from these examples that the mode of combining the
elastic block or core with the flexible material or fabric may be varied. I
would also remark that I have not thought it necessary to explain any mode
or modes of applying the packing, as these are well known, and my Invention
does not relate to them; neither have I described any mode of combining
packing composed as described with other materials, as my Invention does not
relate to any particular combination thereof, but has reference solely to the
mode of composing the roll, which may be applied in different ways, and be
used either by itself or in combination with other materials, as preferred.
Having thus described the nature of my Invention, and in what manner the
same is to be performed, I would have it understood that I do not mean or
intend to confine myself to the precise forms and modes of combination of the
parts represented and described; neither do I claim as of
my
Invention
any of

page_text: the parts separately or otherwise than as used in combination for the purposes
described; but what I do claim as of my Invention is, the construction of a
roll of packing composed of an elastic block or core combined with a flexible
material or fabric, as described.
In witness whereof, I, the said Joseph Henry Tuck, have hereunto set
my hand and seal, this Sixth day of November, in the year of our
Lord One thousand eight hundred and fifty-four.
Witness,
WILLIAM SPENCE,
50, Chancery Lane.
J. H. TUCK. (L.B.)