Improvements in and Connected with Packing for Stuffing. Boxes..
Year: 1889

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Date of Application,. 9th Jan, 1889: 17
328
Complete Specification Left, 26th June, 1889-Accepted, 3rd Aug. 1889
PROVISIONAL SPECIFICATION.
Improvements in and Connected with Packing for Stuffing. Boxes..
1 GEORGE AYLWIN of 24 Argyle Road, Brighton in the County of Sussex,
Engineer do hereby declare the nature of this invention to be as follows
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This Invention consists of a packing of one metal bush in halves, a. brass bush
in halves and one metal ring.
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In the accompanying drawing is represented a section of the packing made in
accordance with the Invention:*
1.
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The metal bush is enclosed in the brass bush and the metal ring encircles the
neck ring.
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144
The metal bush is fitted at the inner end of the stuffing box to the neck ring. The
curve at the outer end of the metal bush is of the same degree as the curve of the neck
ring and the bevel on the outside of the metal bush is made to fit the chamfer of the
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brass bush: s
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The halves of the metal bush are let together as wear requires, and are kept in
position by the brass bush.
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The brass bush' 'A is made to support the metal bush B'by the curve inside of
the brass bush being similar to the outer end of the metal bush, and the chamfer
of the brass bush fitting over the bevel'of the metal büsh.
The two halves of the brass bush are held together by dovetail keys. C at the
outer end.
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The 'diameter of the inner end of the brass bush is one-eighth of an inch greater
than the diameter of the outer end; this difference is owing to the presence of a collar
half-an-inch wide which causes the bush to fit the stuffing box at that end.
The diameter of the greater part of the brass bush, that" part from the collar
to the outer end, being one-eighth of an inch smaller in diameter than tho stuffing
box, will allow the required freedom of movement for the travel of piston rod, valve
spindle or pump ram, this freedom of movement is to prevent the destruction of the
packing.
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The metal ring D that encircles the neck ring is to prevent any steam passing
around the neck 'ring to the stuffing box, "and" is supported by the outer edges of
the metal bush, until the metal bush by wear gets below it; then the brass bush will
support it.
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The ordinary gland is used, and is only rounded off at the end which, enters the
stuffing box. The brass bush being slightly bevelled at its end allows the gland, only
to press on a small portion of the brass busli tliereby allowing the required freedom of
movement of the packing to suit any deviation in the travel of piston rod, valve
spindle, or pump ram.
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COMPLETE SPECIFICATION..
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Improvements in and Connected with Packing for Stuffing Boxes.
I GEORGE AYLWIN of No. 24 Argyle Road, Brighton, in the County. of Sussex,
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 :-
This Invention consists of a packing of one metal bush in halves, a brass bush
whole or in halves, and one metal ring.

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In order that the Invention may be clearly understood, reference is made to the
accompanying drawings which form part of this Specification and in which :-
Fig. 1 is a sectional view of the packing shewing the brass bush A whole.
Fig. 2 is a sectional view of the packing shewing the brass bush A in halves, and
connected by the use of dovetail keys, C.
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The metal bush B is fitted at the inner end to the metal ring D. The curves
at the ends of the metal bush are of similar curvature, and the bevel on the outside of
the metal bush is made to fit the chamfer of the brass bush, and the perpendicular
distance between the two lines on which the bevel falls, is equal to the radius of the
circle, of which the curve of the inner end of the metal bush forms a part.
The halves of the metal bush are let together as wear requires, and are kept in
position by the brass bush.
The brass bush A is made to support the metal bush B by the curve inside
of the brass bush being similar to the curve of the outer end of the metal bush.
The brass bush can either be used whole as shewn in Fig. 1 or in halves, when used
in' halves they are held together by two dovetail keys, C, as shewn in Fig. 2.
When the rod requires support from the packing, the outer diameter of the
inner end of the brass bush is made greater than the. diameter of the outer end, this
difference is caused by the presence of a collar, f, as shown, which causes the bush
to fit the stuffing box at that part. Freedom of movement is allowed to the packing
in the stuffing box to suit any deviation in the travel of the rod, and also to prevent
the destruction of the packing.
The brass bush A can be used either with or without the Collar, f, and when it is
required, the collar is cut out with the bush.
The metal ring D. Figs. 1 and 2 is in halves, and the inner end being flat it is
pressed against the surface of the neck ring which is also made flat.
This metal ring does part of the work usually done by an ordinary neck ring,
for as the metal bush is pressed into the hollowed out part of the metal ring it is
pressed tightly against the sides of the stuffing box.
The ordinary gland is 'used, the only alteration required is that the part which
presses on the brass bush should be rounded off.
The drawings show a hollow part, a, between the metal bush and the brass bush,
also a hollow part, c, under the metal ring, and a groove b cut in the metal bush ;
these hollow parts and the groove are to allow room for expansion to the metal
bush, and to allow the metal bush to bulge outwards at those parts when overpressed
by the brass bush.
The packing is easily accessible, and allows for re-adjustment or replacement in
a short time; and the friction by wear and tear, caused by the ordinary packing
will be reduced to a minimum.
As to the variety of metal used, I find by experiment that a mixture of 20 lbs.
of lead and from lb. to 1 lb. of antimony gives the most satisfactory results, but
1 do not wish to confine myself to these proportions as they will vary according
to the requirements of the pressure of steam used.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
(1) The brass bush, whole or in halves, substantially as and for the purposes
described.
(2) The metal bush in halves substantially as and for the purposes described.
(3) The metal ring, in. halves substantially as and for the purposes described.
(4) The manufacture and use of the packing hereinbefore described and illustrated
in the accompanying drawings.
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1000
THOMAS H. MELLOR,
110, St. James's Street, Brighton, Agent for the Applicant.