Improvements in Metallic Packing for Steam and other Engines.
Year: 1893

page_text: Date of Application, 5th Aug., 1893-Accepted, 9th Sept., 1893
COMPLETE SPECIFICATION.
Improvements in Metallic Packing for Steam and other Engines.
I, WILLIAM WHYTE of 12 Lombard Street in the City and County of
Newcastle upon Tyne, Engineer, do hereby declare the nature of said invention
and in what manner the same is to be performed to be particularly described
and ascertained in and by the following statement :-
My invention relates to improvements in the construction of the rings, formning
the outer series of metallic packing, and has special reference to such metallic
packing as forms the subject of Whyte and Allan's Patent No. 14103 of 188; and
of my Patent No. 20086 of 1889, and is intended to facilitate the fitting together
and securing to each other the segments forming the outer rings.
The outer rings are preferably made in two segments, which are joined to each
other by dovetailed "dowels" formed upon or fitted into one of the segments and
fitting into corresponding dovetailed recesses in the other segment, the inner rings
being formed of two or more segments.
Referring to the accompanying sheet of drawings:
Fig. 1 is a plan of one outer ring consisting of two segments.
Fig. 2 is a section of one outer ring on the line X-X of Fig. 1, the dotted
lines shewing the successive inner and outer rings forming part of a series in a
stuffing box, packing a piston or valve rod.
Fig. 3 is a section on line Y-Y of Fig. 1.
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A is an outer ring formed of two segments joined by dovetailed "dowels" B
fitting corresponding recesses formed in the ring. The dowels" are shewn in two
forms, viz. either cast on one of the segments or, as is preferable, double ended
and separate from the ring one end being fixed in one of the segments by a pin C.
Steady pins D project into corresponding holes in the inner rings, or vice versa, to
prevent the rings turning round upon each other and to break the joints of the
inner and outer rings. In applying the packing the series of rings are built into
the form of a bush around the rod, the "neck-ring" first, then an outside ring, then
a pair of inside rings, and a pair of outside rings in succession and an outside ring
with a turn of soft packing next the gland in ordinary packing to complete the
necessary depth of the "bush" which is then inserted into the stuffing box and the
gland is screwed down.
In applying the packing in the various improved forms described and shewn in
Specification and drawings of Patent No. 20086 of 1889 to give elastic and
adjusting action the outer and inner rings are built into a "bush" around the rod
in a similar manner, the dovetailed "dowels" greatly facilitating the formation of
the outer rings into a circle around the rod and keeping the segments in position
till the packing is inserted in the stuffing box.
The inner rings are preferably made in 3 segments as described and illustrated
in Patent No. 14103 of 1885 and the outer rings in 2 segments as shewn on
Fig. 1.
Having now particularly described and ascertained the nature of said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
The construction and application of the outer rings of metallic packing with
dovetailed "dowels" at the joints of the segments to facilitate the formation of the
packing into a “bush" around the rod and its insertion into the stuffing box, or

page_text: into the enclosing case in what is called " floating" packing, substantially as
described and shewn.
Dated this 5th day of August 1892
T. J. DANSON, F. Inst. P.A.,
Chartered Patent Agent,
Newcastle-upon-Tyne, Agent for Applicant.