Improvements in Valve Packing.
Year: 1891

page_text: Date of Application, 24th Feb., 1891
Complete Specification Left, 28th Oct., 1891-Accepted, 28th Nov., 1891
PROVISIONAL SPECIFICATION.
Improvements in Valve Packing.
I RUDOLF JAGENBURG of Rydboholm, Sweden, Engineer, do hereby declare
the nature of this invention to be as follows:-
In ordinary valves as hitherto constructed, the "packing" is effected by grinding
the metal surfaces one against another. This has the disadvantage, that the
smallest quantity of dirt that may get between the valve surfaces occasions a
faulty packing of the valve, so that an absolutely perfect packing in ordinary
valves is scarcely ever to be met with. In order to make the valve again
secure, it must be ground again, which takes much time and trouble, and in
many cases necessitates the unscrewing of the entire valve.
All these evils are avoided by adapting either to the face of the valve, or to
the valve seat, an elastic cushion which is protected by a covering of thin, soft
metal wrapped round the same.
In carrying out the invention, the valve is provided with a soft elastic cushion of
asbestos, lead, or other suitable material. The cushion is furnished with a
covering made of thin soft metal, the rim or edge of which takes into a groove
turned in the face of the valve.
This covering will be secured by means of a nut, which will press it against the
cushion. When the valve is properly screwed down, the cushion with its covering
comes closely against the valve seat, and makes a thoroughly steam tight joint, even
though a small amount of dirt or grit may have got between, as it will become
embedded in the cushion by reason of the yielding-nature of the latter.
The cushion and its covering may also be ring-shaped, and both inserted in an
annular recess formed in the face of the valve; or the ring-shaped cushion and
covering may be adapted to the valve seat.
In adapting the invention to slide valves, the cushion and its covering are
arranged in the faces of the valve seat.
Valves with packing of this kind maintain their efficiency much longer than the
ordinary valves, and possess the advantage that the cushion, when worn out, can be
taken off by any workman and replaced by a new one.
Dated this 24th day of February 1891.
FAKIALA
201
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Valve Packing.
I RUDOLF JAGENBURG of Rydboholm, Sweden, 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 :--
In ordinary valves as hitherto constructed, the "packing" is effected by grinding
the metal surfaces one against another. This has the disadvantage that the smallest
quantity of dirt that may get between the valve surfaces, occasions a faulty packing
of the valve, so that an absolutely perfect packing in ordinary valves is scarcely
ever to be met with. In order to make the valve again secure, it must be reground,
which takes much time and trouble, and in many cases necessitates the unscrewing
of the entire valve.
All these evils are avoided by adapting either to the face of the valve, or to the
valve seat, an elastic cushion, which is protected by a covering of thin soft metal

page_text: wrapped round the same.
The cushion itself consists either of asbestos or lead, or
if the valve is not to be subjected to any great heat, of india rubber and other
materials.
In the accompanying drawing are, shown valves provided, with cushions of the
kind named.
In the valve shown at Fig.1, the valve seat is provided with a soft elastic
cushion A of asbestos.or lead. The cushions is.furnished with a covering B made
of thin soft metal, the rim.or edge of which takes into a groove D turned in the
face of the valve. This covering will be secured by means of a nut E, which will
press it against the cushion and the valve face C, so that no steam will be able to
find its way between C and D. When the valve is properly screwed down, the
cushion with its covering B comes against the valve seat, and makes a thoroughly
steam-tight joint, even though a small amount of dirt or grit may have got between,
as it will become embedded in the cushion by reason of the yielding nature of the
latter.
In Fig. 2, the cushion A. and its covering B are shown as, ring-shaped, and are
inserted in an annular recess formed in the face C of the valve.
In Fig. 3, the cushion A and covering B are also ring-shaped, but are adapted
to the valve scat.
Fig. 4 shows a screw-down slide valve, in which the cushion A and its
covering B are arranged in the faces of the inlet and outlet openings forming the
valve seat.
Valves with packing of this kind maintain their efficiency much longer than the
ordinary valves, and possess the advantage, that the cushion, when worn, out, can
be taken off by any workman and replaced by a new one.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what. I
claim is
A. valve packing consisting of a soft elastic cushion A, of asbestos, lead, india
rubber, or other material, adapted to the valve face, or arranged in a recess of the
same, or upon the valve seat, and of a covering B, of thin soft metal, for protecting
the cushion, the edges of which covering take into grooves turned in the face of
the valve, or in the valve seat, as shown and described.
Dated this 28th day of October 1891.
NEWTON SUN
Agents for the Applicant.