Improvements in Piston Packing Rings.
Year: 1891

page_text: Date of Application, 12th Dec., 1891
Complete Specification Left, 3rd Aug., 1892—Accepted, 24th Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements in Piston Packing Rings.
I, JAMES DAGLISH of 47 Chillingham Road Heaton in the City and County of
Newcastle-upon-Tyne, Engineer, do hereby declare the nature of this invention to
be as follows:-
The objects of my invention are to obtain a practically solid piston packing
ring which shall at the same time be a floating ring and adjustable for wear
against the "walls" of the cylinder without using springs or other auxiliary means
of adjustment.
To effect these objects I make the main or "floating" ring in segments bolted
together through internal flanges so as to form a true circular surface in working
contact with the "walls" of the cylinder. And this ring when bolted together is
held in place between and by the flanges of the piston and the "junk" ring, and is
at liberty to move horizontally, so accommodating itself to any variation that may
be between the centre of the piston rod and the walls of the cylinder, and by
inserting liners" between the joints of the segments of the packing ring it can be
expanded and adjusted to suit any deviation that may occur in the diameter of the
cylinder due to wear or any other cause.
In another form in the outer face of the said "floating" packing ring I form a
cavity, or cavities, to receive a spring packing ring or rings to act as self adjustable
to the walls of the cylinders. These rings can be of such size or section as to
enable them to be sprung over the said packing rings, or the said packing ring can
be cut in parts horizontally to admit the spring ring or rings without springing
them over the said packing ring.
In another form I use an ordinary external packing ring, with "tongue" pieces
and self adjustable but also set out, without springs, by the adjustment of the inner
packing ring as first named.
Ithus obtain a piston packing ring that shall be at the same time solid yet
adjustable, without springs, uniformly and in true circumferential form to the
increasing diameter of the cylinder as wear goes on and which cannot possibly
expand by accidentally getting steain packed" on inside. At the same time if
the piston rod has not a tail rod the piston will freely adjust itself owing to the
freedom of the packing ring.
.5
Dated this 12th day of December 1891.
T. J. DANSON,
By L. W., per F. B.
COMPLETE SPECIFICATION.
Improvements in Piston Packing Rings.
1, JAMES DAGLISH, of 47 Chillingham Road, Heaton, in the City and County
of Newcastle-upon-Tyne, Engineer, do hereby declare the nature of this invention
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
The objects of my invention are to obtain a practically solid piston packing ring
which shall at the same time be a 56
floating" ring and adjustable for wear
against the "walls" of the cylinder without using springs or other auxiliary means
of adjustment.
To effect these objects I make the main or floating" ring in segments bolted
together through internal flanges so as to form a true circular surface in working
Price 8d3

page_text: contact with the "walls" of the cylinder. And this ring when bolted together is
held in place between and by the flange of the piston and the "junk" ring, and is
at liberty to move horizontally, so accommodating itself to any variation that may
be between the centre of the piston rod and the walls of the cylinder, and by
inserting liners between the joints of the segments of the packing ring it can be
expanded and adjusted to suit any deviation that may occur in the diameter of the
cylinder due to wear or any other cause.
In another form in the outer face of the said " floating packing ring I form a
cavity, or cavities, to receive a spring packing ring or rings to act as self adjustable
to the walls of the cylinders. These rings can be of such size or section as to
enable them to be sprung over the said packing ring or the said packing ring can
be cut in parts horizontally to admit the spring ring or rings without springing
them over the said packing ring.
In another form I use an ordinary external packing ring, with "tongue" pieces
and self adjustable but also set out, without springs, by the adjustment of the inner
packing ring as first named.
I thus obtain a piston packing ring that shall be at the same time solid yet
adjustable, without springs, uniformly and in truc circumferential form to the
increasing diameter of the cylinder as wear goes on and which cannot possibly
expand by accidentally getting "steam-packed" on inside. At the same time if
the piston rod has not a tail rod the piston will freely adjust itself owing to the
freedom of the packing ring.
On the accompanying sheet of drawings
Fig. 1 shews a section of a piston with a packing ring fitted according to my
invention and which is supposed to be for a vertical cylinder and Fig. 2 is a plan,
partly in section of the same.
Figs. 3, 4, 5, 6, 7 and 8 shew various sections of packing rings which may be
used in connection with my improvements.
Referring to Figs. 1 and 2, A. is the body of a piston having 6 arms. B is the
piston flange, C the "junk" ring secured to the body of piston by bolts D screwed
into nuts E screwed into the piston.
The packing ring F as shewn is formed of four segments each of which is bolted
to the other through flanges G forming a perfectly true circle and has flanges H
projecting inward from its main circle to form guides between the flange B and
the junk ring C with which they form steam tight joints but allow the packing
ring, which call a "floating" ring, freedom to accommodate itself horizontally
to any deviation caused by the piston rod being working "out of truth" from any
cause.
As wearing of the surface of the packing ring and of the walls of the cylinder
proceeds the diameter of the packing ring is adjusted thereto by thin liners
inserted between the flanges G a practically true circle being still formed by the
packing ring.
Fig. 3 shews another section of my improved floating packing ring F in which a
cavity is formed to receive a spring ring K acting to adjust itself to the walls of
the cylinder to a certain degree and further adjusted by expanding the main
packing ring by liners. In Figs. 4 and 5 two spring rings are shewn variously
disposed in cavities formed in the main packing ring and in each of these cases the
spring rings Kare sprung into the cavities by expanding them but in Fig. 6
the cavities being at top and bottom edges of the main ring the spring rings
are inserted before it is fitted into the position. In Fig. 7 the main ring is shewn
divided into two parts horizontally at X the spring ring being inserted before the
segments are bolted together.
<
My improved piston packing may also be used in conjunction with an ordinary
external spring packing ring tongued" at joint as shewn by Fig. 8 but set out,
without separate springs, by the expansion of the main ring.

page_text: Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1st. The improvements in piston packing rings consisting of a main ring con-
structed of a number of seginents bolted together and adjustable in diameter by
means of "liners" inserted between the joints of the segments, without the use of
springs to expand it, said packing ring being inserted between the flange and the
junk ring of the piston with steam tight edges but free to adjust itself to the walls
of the cylinder relatively to the centre line of the piston rod substantially as
described.
2nd. In combination with such a main packing ring the application of a spring
ring or rings inserted in a cavity or cavities formed in the outer circumference as
shewn in various forms by sections Figs. 3. 4. 5. 6. and 7 or an external "spring-
tongued" packing ring as shewn by Fig. 8.
Dated this 2nd day of August 1892.
T. J. DANSON, F. INST. P.A.,
Chartered Patent Agent, Newcastle-upon-Tyne, Agent for Applicant.