IMPROVEMENTS IN METALLIC PACKING FOR PISTON ROD AND OTHER STUFFING BOXES FOR STEAM ENGINES AND FOR THE MANUFACTURING THEREOF
Year: 1885

page_text: We WILLIAM WHYTE of 7 Wentworth Place in the City and County of
Newcastle upon Tyne Consulting Engineer and JAMES ALLAN of 22 Regent Street
South Shields in the County of Durham Marine Engineer do hereby declare the
nature of our invention for IMPROVEMENTS IN METALLIC PACKING FOR PISTON ROD
AND OTHER STUFFING BOXES FOR STEAM ENGINES AND FOR THE MANUFACTURING
THEREOF to be as follows:-
This our invention consists of semi-annular rings of antifriction metal, made in
four sections each; two sections forming a ring, the cross-section of which is a
right angle-The two sections forming the outside part have their base and outer
periphery at right angles to each other-The ends of these sections are dovetailed
so that when the two sections are put together they lock-The two sections
forming the inner part have their base and inner periphery at right angles to each
other and each section is a little less than a semicircle to permit of lateral adjust-
ment as the metal wears-In the centre of each section a feather or key is formed
on the hypotenuse, which fits into a corresponding groove in the hypotenuse of
the outer part-Suitable pins and holes are formed at the base of each section to
secure them in their proper position, so that the open ends of the sections will be
at their greatest distance from each other-The whole of the series of rings can
then be built in the form of a bush in the following manner :-Next the neck ring
is placed an inside ring, then the corresponding outside ring is fitted; on that
follows the base of the next outside ring, then two inside, and two outside rings
alternately till the required depth is filled, and then a turn of soft packing is
placed next the gland for more effective service.
The improvement in manufacturing the packing consists in moulding the
segments in steel or other suitable metallic dies, to the required shape instead of
the present process of moulding machining and finishing.

page_text: Our construction of packing has the following advantages over all others;
First, the steam cannot work the ends of the inside turns in a line with each
other and so leak, the feathers and pins preventing this-They also act as a guide
for packing the gland.
The outside ring ends being dovetailed, holds the whole of the packing together,
thus greatly facilitating the packing and unpacking of glands.
The advantages in our moulding process are:-First, no machinery is required,
each segment being cut and finished in the die instead of moulding, casting,
turning, and cutting as at present practised.
Dated thin Somantranth das of Naramban 198K

page_text: improvements in Metallic Packing for Piston and other Stuffing
Boxes for Steam Engines, and for the Manufacturing thereof.
WILLIAM WHYTE of Number 7 Wentworth Place in the City and County of
Newcastle upon Tyne Consulting Engineer and JAMES ALLAN of Number 22 Regent
Street, South Shields in the County of Durham Marine Engineer do hereby declare
the nature of our invention for IMPROVEMENTS IN METALLIC PACKING &C. and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement :-
This our Invention consists of semi-annular rings of anti-friction metal.made in
four sections each, two sections forming a ring the cross section of which is a right
angle-The two sections forming the outside part have their base and outer
periphery at right angles to each other the ends of these sections are dovetailed so
that when the two sections are put together they lock, the two sections forming
the inner part have their base and inner periphery at right angles to each other,
and each section is a little less than a semicircle to permit of lateral adjustment as
the metal wears-In the centre of each section a feather or key is formed on the
hypotenuse which fits into a corresponding groove in the hypotenuse of the outer
part-Suitable pins and holes are formed at the base of each section to secure
them in their proper position so that the open ends of the sections will be at their
greatest distance from each other, the whole of the series of rings can then be
built in the form of a bush in the following manner, next the neck ring is placed
an inside ring then the corresponding outside ring fitted on that follows the
base of the next outside ring, then two inside and two outside rings alternately till
the required depth is filled, then a turn of soft packing is placed next the gland for
more effective service.
'Since the foregoing Provisional Specification was lodged we have made the
following improvement, namely, instead (as previously described) of cutting the
inner ring in two parts it is now cut in three, sufficient being cut out of each of
the three parts to allow of a much greater lateral adjustment to the rod without
leaving an open space for the steam to escape by; this is done by making each
inside end of the segments angled to such a degree that as the inside circumference
of the ring wears, the angled ends will be worn off, and thus prevent the ends
from jambing.
A further description may be seen by reference to the accompanying Drawings,
Figures 1. 2. 3. 4. 5, 6. 7 and 8.
Figure 1, represents the plan of an inside ring cut in two and a piece cut out to
allow for wear.
Figure 2, is a section of the above.
Figure 3, represents the plan of an outside ring showing the dovetailed ends.
Figure 4, represents a section of the above.

page_text: Figure 5, represents the plan of an inside ring showing the improved method of
cutting the ring in three.
Figure 6, represents a section of the above, showing the position of pins.
Figure 7, represents the plan of an outside ring showing the position of pins
and holes.
Figure 8, represents a section of the above.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is;-
(1) The introduction of pins and feathers as above described.
(2) The dovetailing of the ends of the outside rings as above described.
(3) The cutting of the inside rings in three parts as above described.