An Improved Packing for Pistons, Spindles, and other Working Rods.
Year: 1892

page_text: Date of Application, 10th May, 1892
Complete Specification Left, 10th Feb., 1893-Accepted, 29th Apr., 1893
PROVISIONAL SPECIFICATION.
An Improved Packing for Pistons, Spindles, and other
Working Rods.
I JOHN SMITH 11 Lordship Lane Dulwich in the County of Surrey, Engineer
do hereby declare the nature of this invention to be as follows:-
My improved packing for preventing the passing of steam or liquid consists of
metallic wire or chain either linked or open of a suitable depth and thickness
with a backing of asbestos or any other suitable compressible material. The wire
or chain is made preferably (but not necessarily) at an oblique angle to the moving
body and is so arranged on the backing of asbestos or other compressible material
that the surface is in immediate contact with the moving body and is held up, or-
forced, to it by a screw down or any other suitable means for compressing the.
material forming the backing.
1000
COMPLETE SPECIFICATION.
An Improved Packing for Pistons, Spindles, and other
Working Rods.
I JOHN SMITH of 11 Lordship Lane, East Dulwich, London, 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:-
My improved packing to prevent the passing of steam or liquid consists of
metallic wire or chain either linked or open of a suitable depth or thickness with a.
backing of asbestos or any other suitable compressible material.
The wire or chain is made preferably (but not necessarily) at an oblique angle.
to the moving body and is so arranged on the backing of asbestos or other com-
pressible material that its surface is in immediate contact with the moving body
and is held up or forced to it by a screw-down or any other suitable means of
compressing the material forming the backing.
In order that my invention may be readily carried into effect, I have appended
a sheet of drawings containing perspective views of four modifications of my
improvements.
In Figs. 1 and 2 a are copper or soft metal wires secured to or bedded in an.
asbestos or other suitable backing b. The wires are bent into a zig-zag or
corrugated form with transverse axes at right angles to (as in Fig. 1) or diagonal
to (as in Fig. 2) the longitudinal axis of the packing. The wire a may be in a
continuous piece or in sections.
In Fig. 3 a metallic chain c is used instead of a wire.
In Fig. 4 pieces of wire are attached to the face of the backing with the zig-zaga
or corrugations running across the face of the backing b.
The said wire or chains are held in position until they become sufficiently
embedded by use, by means of wire stitches d or when sections are used, by
bending the ends at right angles to the body and forcing such ends into the
backing.
Amongst other advantages of my packing are, that in wear the metal becomes
embedded in the backing, and that as the asbestos, textile, fibrous, or other suitable.
material wears more rapidly than the metal, the said material is forced forward by
pressure of the gland so as to maintain equal contact with the moving part.

page_text: Although a square backing alone is shown, it will be obvious that a round or
otherwise-shaped backing may be used.
Having now particularly described and ascertained. the nature of my said
invention, and in what manner the same is to be performed I declare that what I
claim is:-
The combination of wire or chain with a suitable backing, substantially in the
manner and for the purpose set forth.
ليم
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