Improvements in Engine Packings.
Year: 1889

page_text: Date of Application, 28th Feb., 1889
Complete Specification Left, 28th Nov., 1889-Accepted, 28th Dec., 1889
PROVISIONAL SPECIFICATION.
Improvements in Engine Packings.
We, JOSEPH MOSELEY, Manufacturer, and BENJAMIN BLUNDSTONE, Manager, both
of Chapelfield Works, Ardwick, Manchester, in the County of Lancaster, do hereby
declare the nature of this invention to be as follows:-
This Invention relates to engine packings and it has for its objects to increase the
durability of the packing and to enable it better to resist the action. of high pressure
steam.
These Improvements consist in the incorporation or combination with the packing
of-metallic gauze or cloth which has first been corrugated.
This packing may be made up in any known or convenient manner but so that one
or more layers, plies, or thicknesses of the corrugated metallic gauze or cloth is or are
used in combination with the woven braided or other material of which the packing is
constructed.
-
Dated this 27th day of Webruary A n 1880
WILLIAM E. HEYS,
Agent for the Applicants.
COMPLETE SPECIFICATION.
Improvements in Engine Packings.
We, JOSEPH MOSELEY, Manufacturer, and BENJAMIN BLUNDSTONE, Manager, both
of the Chapelfield Works, Manchester, in the County of Lancaster, 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 relates to engine packings and these Improvements consist in the
combination and arrangement in the packing of a metallic gauze element in such a
manner as to preserve the flexibility and pliability of the packing whilst at the same
time the firmness and durability due to the metallic element are secured to the fullest
extent:
In order that our Invention may be more fully understood, we will proceed to
describe it with reference to the accompanying drawings in which Fig. 1 represents a
plain sheet of metallic gauze, Fig. 2 a similar sheet in preparation for use in the con-
struction of the packing and Figs. 3, 4, 5, 6, 7, and 8, various forms of packing
constructed according to this Invention.
In each of the Figures in which the parts are represented, a is the metallic gauze;
bis the outer layer or covering of the packing; is the layer or layers of fabric
used in combination with the metallic gauze; and d is a strip or core of indiarubber
or similar or suitable material.
"
The metallic gauze is first prepared by grooving, corrugating or indenting it by
rollers or other suitable means and by preference parallel either with the warp or with
the weft. The corrugated grooved or indented sheet of metallic gauze is then cut
diagonally or in. bias"
(as indicated in Fig. 9) into strips of such width as may be
required. These strips are used in the manufacture of the packing in addition to or
in substitution for some of the layers or plies of asbestos or other suitable fabric
ordinarily employed.
In the packing represented in Fig. 3 a strip of the corrugated indented or grooved
gauze cut from the sheet as herein before described is doubled with a strip of asbestos
or other similar and suitable fabric, and the double material is then folded and
refolded until the desired dimension is obtained. The packing is then enveloped in a

page_text: covering of a fabric 6, such as is ordinarily used for the purpose in the manufacture of
known packings.
In the packing represented in Fig. 4 alternate strips of suitable textile fabric and
of the prepared metallic gauze are cemented together in alternate layers. The strips
thus secured together may be surrounded on three sides by a covering of suitable
textile material so as to leave exposed the alternate edges of the metallic gauze and
textile material along one edge. As shewn in the drawing a strip of indiarubber d is
added to the composite strips before the covering 6 is cemented on.
In constructing the packing represented in Fig. 5 we may first double or cement
together a strip of the prepared metallic gauze and a similar strip of the textile fabric
and roll them together as represented in Fig. 8. This roll is then, by suitable dies or
by other known means, compressed into a square or prismatic form and the packing
is finally completed as hereinbefore described with reference to Fig. 4. In this form
of packing (Fig. 5), the prepared metallic gauze forms the outside of the roll and
when therefore the packing is finished, the metallic gauze is exposed on the wearing
surface as indicated at a in the Figure.
The packing illustrated by Figure 6 resembles that shewn in Fig. 3 except that a
strip of indiarubber d, is included therein.
The circular packings, Figs. 7 and 8, are made by rolling doubled strips of the
prepared metallic gauze and of suitable textile fabric together. As indicated in
Fig. 7, a core of indiarubber is included in the packing.
The prepared metallic gauze and the textile fabric may, when required, be
doubled" or secured together by cement or by other suitable means in a similar
manner to that at present adopted for securing the different layers together in similar
packings of ordinary construction.
It will be obvious that since the metallic gauze is so prepared that the corrugations
indentations and grooves are diagonal in the strips which are employed in the
construction, they will also be diagonal (or spiral if rolled) in the finished
packing.
It is preferred to make the corrugations grooves and indentations comparatively
small and close together. No precise dimensions need to be observed, but if the
corrugations are about half a millimeter deep and two millimeters apart for ordinary
packings, a very good result will be obtained. Other greater or lesser dimensions
may be used when desired, or for larger or smaller packings than the average.
The indentations made in the metallic gauxe may be so acute as to nearly or com-
pletely sever the gauze into tapes or ribbons. In this case we interrupt the acute
indentations at intervals so that the severed or nearly severed portions may be held
together at the points where the indentations are interrupted. A piece of metallic
gauze prepared with these acute indentations is represented in Fig. 9 where the
vertical broken lines represent the interrupted indentations and the diagonals represent
the lines along which the acutely indented gauze is cut into strips to be used in the
manufacture of the packing. The interruptions between the acute indentations are
at such frequent intervals that there shall be at least one such interruption in each line
of indentation, between each diagonal cut. When this precaution is taken the strip
severed from the sheet by any diagonal cut will be held together by the parts which are
not acutely indented or incised.
Owing to the corrugations grooves and indentations in the metallic gauze, packings
constructed according therewithashereinbefore described, are very pliable and durable,
and they are also more convenient in use than packings with wire cloth arranged
therein in the ordinary manner as plain sheets or strips.
The forms of the packings illustrated by the accompanying drawings are well known
and we therefore do not claim them apart from the arrangement therein and the herein-
before described combination therewith of the prepared metallic gauze. The types
illustrated are those of the packings at present most generally in use and they have
been selected for illustration for this reason only, but our Invention may be applied
to other forms and types of packing with equal advantage, and we desire it therefore

page_text: to be understood that we do not limit our Invention to the types and forms of packings
illustrated by the drawings.
Having now particularly described and ascertained the nature of our said Inven-
tion and in what manner the same is to be performed, we declare that what we
claim is:-
(1) In engine packings; the combination and arrangement with a layer or layers
of textile fabric of a layer or layers of metallic gauze prepared by being corrugated
indented or grooved and cut diagonally into strips substantially as hereinbefore
described with reference to the accompanying drawings.
(2) In engine packings; a layer or layers, ply or plies, of corrugated indented
or grooved metallic gauze arranged in the packing in such a manner that the corru-
gations indentations and grooves are in a spiral or diagonal direction substantially
as hereinbefore described with reference to the accompanying drawings.
Dated this 10th day of October A.D. 1889.
WILLIAM E. HEYS,
Agent for the Applicants.