Improvements in or connected with Packing Washers or Rings for Stuffing Boxes.
Year: 1891

page_text: Date of Application, 11th Mar., 1891-Accepted, 11th Apr., 1891
COMPLETE SPECIFICATION.
Improvements in or connected with Packing Washers or Rings for
Stuffing Boxes.
I, ELIAS MISSEL, Manufacturer, of Blumenstrasse, 8, Stuttgart, in the Kingdom
of Wurtemburg and German Empire, 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 packing washers or rings for stuffing boxes, which can
be placed in the stuffing boxes in various different ways and in such a manner as to
cause the washers or rings to lie closely round the rod and take the place of hemp
or metal packing.
.
The object of the invention hereinafter described is to provide a stuffing box
packing which is self lubricating, closes tightly on the rod being packed, is
extremely durable, and preserves the rod from being worn by friction. The pack-
ing can be used either with high or low pressure steam, or water pressure.
The annexed drawings shew the construction of a packing washer or ring accord-
ing to this invention.
Figure 1 shews the mode of laying up the material of which the washer or rings
are made.
Figure 2 is a sectional view of the packing washer or ring.
Figure 3 is a perspective view of the washer or ring.
A packing washer or ring according to this invention is constructed as follows:-
Round a mandril A of the exact diameter or thickness of the rod to be packed, a
greased belt or band of hemp, silk, cotton, or asbestos fibre B is wound, and this is
then overlaid with a specially prepared continuous strip of paper C, manufactured
from hemp, silk, cotton, or asbestos fibre. The diameter of the packing ring corre-
sponds to that of the stuffing box in which it is to be used.
The lubricant with which the ring is saturated and provided consists preferably
of tallow, tale, mica, and graphite. The tallow serves as the lubricant, the talc,
mica and graphite serve as the smoothing medium, and in consequence of this
property diminish the friction of the rod.
The packing ring thus produced is generally cut obliquely across at D in order
to be laid easily round the rod to be packed and pressed into the stuffing box.
When the ring is cut open the several paper layers C and strips B are held
together by means of thread E sewn through them, thus preventing the separation
of the parts.
The several rings of which the packing is composed are placed in the stuffing
box in such a manner as to have the cuts D opposite to one another. Then against
the upper and lower ring there is introduced, and tightly pressed, a hemp plat, for
the purpose of preventing a direct pressure of the gland and seat against the packing
rings. In this manner the packing rings lie quite tightly against the rod and are so
pressed together by the tightening up of the gland (which latter is rarely required)
that the edges of the paper are splayed and forced together. By this means the
grease is transmitted to the rod.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. A packing washer or ring for stuffing boxes, consisting of an inner greased
band of hemp, silk, cotton, or asbestos, over which is wound-until the desired
diameter is attained. -a continuous hand of absorbent naner made from hemn. silk

page_text: cotton, or asbestos fibre, prepared and saturated with a mixture of tallow, talc, mica.
and graphite, as set forth.
2. Packing washers or rings for stuffing boxes, constructed substantially as herein
described, and adapted to be placed in the stuffing box and packed up by the
tightening of the gland, as set forth.
Dated this 10th day of March 1891.
CHEESBROUGH & ROYSTON,
15, Water Street, Liverpool, Applicant's Patent Agents.