Improvements in the Manufacture of Packing for the Piston Rods of Steam Engines and other Analogous Purposes.
Year: 1891

page_text: Date of Application, 15th June, 1891-Accepted, 18th July, 1891
COMPLETE DIEUITIVATION.
Improvements in the Manufacture of Packing for the Piston Rods
of Steam Engines and other Analogous Purposes.
I SAMUEL TURNER of the firm of Turner Brothers of Spotland Rochdale in the
County of Lancaster Manufacturers do hereby declare the nature of this inven-
tion 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 the manufacture of steam packing for piston rods valve
spindles and the like in continuous lengths which can be cut and formed into rings
or otherwise employed for packing purposes.
The nature of my invention and the manner in which the same is to be per-
formed or carried into practical effect will be readily understood on reference to
the drawings hereunto annexed and the following explanation thereof.
According to my invention I propose to construct the packing by first rolling up
a cloth (composed of asbestos threads with one or more fine wires running through
each thread) into the form of a rope, or the cloth may be composed entirely of
asbestos yarn or of any other suitable fibrous material, but in either case, previously
to rolling up the cloth, I coat it with india rubber in the usual way to make it
adhesive.
I propose to make the packing rectangular in form or thereabouts, in the
following manner vizt.: by first making packings of a suitable size round in section
(see Fig. 1.) and then pressing them into a wedge shaped or triangular form
preferably a right angled triangle as shown at Fig. 2, so that when two or more
of these sections are placed together as shown at Figs. 3. 4. and 5 they assume a
rectangular form.
The whole is then surrounded with one or more layers of cloth (as shown at a)
made sufficiently adhesive to hold the same together for convenience of handling
and transit or the same may (if preferred) be surrounded with a wrapping or
platting of asbestos or other yarn, or metal wire or a combination of both, or of
any other suitable fibrous material.
I wish it to be understood that although I prefer to construct the wedge shaped
or triangular sections of rolled cloth as herein before described I do not desire to
confine myself to this method of manufacture as the same end may be obtained by
first platting braiding or twisting suitable strands into the form of a rope and then
pressing them into the required wedge shaped or triangular form.
By this improved mode of manufacture the triangular sections are so condensed
by pressing into shape that although they present a solid compact substance much
more capable of resisting the friction of the moving parts to be packed, yet by
reason of their triangular or wedge shaped form they are easily compressed from
a square into a flattened rectangular form of increased width as shown at Fig. 6 by
reason of their angular or wedge shaped sides sliding one upon the other during
the compression, and it will hence be obvious that very little pressure of the gland
nuts will form or mould the packing into the recess of the stuffing box, and keep it
in close contact with the piston rod, valve spindle or other moving part to be
packed.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
A packing made rectangular in form or thereabouts composed of two or more
1
11

page_text: woven rolled twisted or platted fibrous material surrounded by one or more layers
of cloth, or other binding material substantially as hereinbefore described and
illustrated by the drawings annexed.
Dated this 13th day of June 1891.
GEO. DAVIES & SON,
4, St. Ann's Square, Manchester, Agents for the Applicant.