Improvements in Packing for Steam Engines and other Machinery.
Year: 1891

page_text: Date of Application, 12th Feb., 1891
Complete Specification Left, 22nd Oct., 1891-Accepted, 28th Nov., 1891
PROVISIONAL SPECIFICATION.
Improvements in Packing for Steam Engines and other Machinery.
I, GEORGE FREDERICK REDFERN, of the firm of G. F. Redfern & Co., the
General Patent Office, No. 4 South Street, Finsbury, in the County of Middlesex
Patent Agents do hereby declare the nature of this invention (communicated to
me from abroad by Jules Armengaud Jeune of 23, Boulevard de Strasbourg, Paris,
in the Republic of France) to be as follows:-
This invention relates to packing for steam, hydraulic or any other machinery.
The improved packing comprises a core or filling of fibrous or other material
charged with a lubricant and in the form of a plait or rope or in some other suitable
form. This core is partly enveloped or sheathed in metal of a soft composition, such
as lead, the uncovered or perforated part when the packing is in use being next to
the wearing surface, so that the lubricant cannot be expressed in any other
direction than against the spindles, rod or ram as the case may be. In this respect
the improved packing differs from ordinary packing which allows the lubricant
to be squeezed out all round and to have vent where not required. The retention
of the lubricant is further secured by the edges of the sheathing coming in fine
wearing contact with the rams, rods or the like, the said edges preventing the
escape of any portions of the fibrous core, the abraiding and loss of which is so
common with ordinary packing. Furthermore the arrangement prevents the fibrous
packing (when used as a core) from picking up a metallic coating from the rods, or
rams, and thus prevent scoring or fluting.
Instead of partly sheathing the core as hereinbefore described the core may be
introduced into a tube of oval or square section the said tube being perforated or
grooved to allow the lubricant to be expelled by the pressure produced when
tightening the stuffing box gland.
7
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Packing for Steam Engines and other Machinery.
I, GEORGE FREDERICK REDFERN, of the firm of G. F. Redfern & Co., the
General Patent Office, No. 4, South Street, Finsbury, in the County of Middlesex,
Patent Agents, do hereby declare the nature of this invention (a communication
to me by Jules Armengaud Jeune, of 23, Boulevard de Strasbourg, Paris, in the
Republic of France) and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement :-
This invention relates to packing for steam hydraulic and other machinery.
When packing, as ordinarily employed, is compressed by tightening the packing-
gland or otherwise, the lubricant contained by the packing escapes therefrom at all
parts of the surface, so that a considerable portion of the said lubricant is wasted
by not coming into contact with the rod, ram or the like to be lubricated.
According to my invention I provide means whereby the lubricant cannot be
expressed from the packing in any other direction than towards the surface to be
lubricated, and to this end I enclose a core or filling of fibrous or other material
(in the form of a plait or rope or in some other suitable form) in a sheath or
envelope of soft metal or composition, the said envelope or sheath being open or
perforated on that side which is to lie next to the surface to be lubricated,
D

page_text: To enable my invention to be fully understood I will describe the same with
reference to the accompanying drawing, in which :-
Figure 1 is an elevation of a strip of packing constructed according to my
invention; and,
Figure 2 is a transverse section of the same :
Figure 3 is a sectional elevation of so much of a stuffing box, gland and rod
as is necessary to illustrate the application thereto of my improved packing; and,
Figure 4 is a view similar to Figure 3, but shewing the packing more or less
compressed within the stuffing-box :
Figures 5 and 6 are views similar to Figures 1 and 2 respectively of a. modified
form of packing.
a indicates a strip of fibrous packing of any ordinary or suitable construction,
and my envelope or sheath. As shewn in Figures 1 and 2 this sheath does not
When this
completely encircle the fibrous packing but is cut away upon one side.
packing is applied it is placed with the open side of the sheath towards the rod, as
shewn in Figure 1, so that, when the gland is tightened down, the lubricant
contained by the packing, in escaping, is bound to come into contact with the rod
to lubricate the same..
Instead of only partially encircling the fibrous packing, as shewn in Figures 1
and 2, the sheath may be formed to entirely encircle the packing, as shewn in
Figures 5 and 6, but in this case the side of the packing which is to be in contact
with the wearing surface is provided with a number of perforations such, for
instance, as shewn in Figure 5, or with a series of slots or openings of any other
suitable shape.
In Figures 1 and 2 the packing is shewn of circular shape, and in Figures 5 and 6
of oval shape, but it is to be understood that it may be of a square or other suitable
shape in transverse section.
In addition to the advantage hereinbefore referred to, namely, that of pre-
venting the escape of the lubricant except at one point, this invention has the
further advantage that it prevents the fibrous packing from picking up a metallic
coating from the rods or rams and thus prevents the scoring or fluting of the
latter.
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 packing for steam engines and other machinery comprising a fibrous core and
a sheath or envelope provided with an opening or series of openings through which
the lubricant contained by the said core can escape when the packing compressed,
'substantially as described.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.