Improvements in Metallic Packing Ring for Engine Cylinders and the like.
Year: 1897

page_text: Date of Application, 13th Oct., 1897
Complete Specification Left, 12th July, 1898-Accepted, 13th Aug., 1898
PROVISIONAL SPECIFICATION.
Improvements in Metallic Packing Ring for Engine Cylinders and
the like.
I, WILHELM GMINDER, of 19, Mozart Strasse, Stuttgart, in the Kingdom of
Wurtemberg, and German Empire, Manufacturer, do hereby declare the nature
of this invention to be as follows:-
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Our invention relates to a metal packing for stuffing boxes with ridged surfaces
of soft metal.
This arrangement enables the otherwise hard smooth metal surfaces to apply
themselves to the walls of the stuffing boxes, as well as to the piston rod completely
steam tight, because the thin yielding metallic edges between the grooves are easily
pressed upon the surfaces to be rendered steam tight. Moreover the grooving pre-
sents the advantage, that the steam or the like, which is to be prevented from
passing is throttled in this passage from one ridge to another, the pressure thereby
is so diminished, that the outermost surfaces are only subjected to slight pressure.
The packing rings are in two parts and of triangular sections; they are pro-
vided with grooves at the outer edge, and may be provided if desirable with
triangular projections which serve to guide the adjustments of the multiple pack-
ing rings. The multiple rings have also a triangular section, they are provided
at the inner edge with grooves and so arranged that they are pressed steam tight
against the piston rod by means of the yielding of the stuffing box top in conse-
quence of the action of the wedge surfaces, whilst, the rings at the same time apply
themselves to the walls of the stuffing box.
The cores of the said rings are formed of cast-iron and the grooved surfaces of
soft metal. The latter are connected to the hard core by means of dovetailing, so
that when the wearing surfaces are destroyed they may be easily melted away and
replaced by a new soft metal ring.
The modification with still finer grooves has proved itself a great advantage in
practical use.
Improvements in Metallic Packing Ring for Engine Cylinders and
the like.
I, WILHELM GMINDER, of 19, Mozart Strasse, Stuttgart, in the Kingdom of
Wurtemberg, and German Empire, Manufacturer, do hereby declare the nature
Price 8

page_text: 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:—
My invention relates to a metal packing for stuffing boxes with ridged surfaces
of soft metal.
This arrangement enables the otherwise hard smooth metal surfaces to apply
themselves to the walls of the stuffing boxes, as well as to the piston rod completely
steam tight, because the thin yielding metallic edges between the grooves are easily
pressed upon the surfaces to be rendered steam tight. Moreover the grooving pre-
sents the advantage that the steam or the like, which is to be prevented from
passing is throttled in this passage from one ridge to another, the pressure thereby
is so diminished, that the outermost surfaces are only subjected to slight pressure.
The packing rings are formed in two parts, and have a triangular cross section.
They are provided with grooves r on the outer surface, and possess preferably, but
not invariably, the triangular projections 6 (Fig. 2) which latter serve as guides
in the adjustment of the divided rings c. The aforesaid rings c are also of
triangular section, and are provided at their inner side with the grooves r¹ and are
pressed steamtight against the piston rod, whilst the parts a are at the same time
pressed against the sides of the stuffing box.
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Referring to Figure 3 the parts a and c of the packing rings are preferably of
cast iron, and the grooved contact surfaces ƒ and g of soft metal. The latter are
dovetailed into the harder portions a and c. This enables the parts f and
worn out to be easily melted out and replaced by a new casting.
when
Figure 4 shews a modification provided with finer grooves, which has been found
of special use in practice.
-
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I declare that what I
claim is:-
1. The improved metallic packing for stuffing boxes consisting essentially of a
double ring of triangular section having at its outer surface a groove or grooves,
in combination with a double or multiple adjustable packing ring also of triangular
section, and provided at its inner surface with grooves substantially as described.
2. The improved metallic packing for stuffing boxes of steam engines and the
like, constructed substantially as described and illustrated in one modification in
Figures 1, 2, and 3, and in another modification in Figure 4 of the accompanying
drawings.
n
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W. P. THOMPSON & Co.,
322, High Holborn, London, W.C., Patent Agents for the Applicant.