Improvements in Metallic Packings for Piston Rods and like Uses.
Year: 1897

page_text: Date of Application, 6th Feb., 1897-Accepted, 3rd Apr., 1897
COMPLETE SPECIFICATION.
Improvements in Metallic Packings for Piston Rods and like Uses.
I WILLIAM EDGAR PLUMMER of Soho Works, Thornton Road, Bradford, in the
County of York, Managing Director 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 improvements in connection with metallic packings for
piston or other reciprocating rods. In some packings of this class use is made of
a circular washer or plate, encircling and approximately fitting the rod, and moved
laterally or vertically by the latter in its vibrations. These washer or sliding plates
are often made of cast iron or other durable metal to withstand the wear engendered
by friction of the washer plates against the stationary parts of the packings. The
piston or other rod passes to and fro through the sliding plates, and may, under
present conditions, run in contact with the latter throughout the length of each stroke.
This is objectionable, as either the plates or the rod, or both, may become worn by
the consequent friction.
The object of this invention is to prevent these washer or sliding plates, from
touching the rod during its travel. The manner in which this is accomplished will be
seen by reference to the accompanying sheet of drawings whereon like letters refer to
similar parts.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 shews by a sectional view and a plan view one form of packing according to
my invention.
Figs. 2, 3 and 4, shew, by like views respectively other modifications of form of
packing to which the invention is applicable.
Referring to these figures, A is the piston rod, B is the packing material, either in
segments or rings, C is a ring encircling the packing material, and may be provided
with pockets for holding springs as shown, or may be a plain ring, if the spring is of
the class which encircles the packing material, having the ends united and so keeping
the packing rings or segments in contact with the reciprocating rod.
D is the washer or sliding plate, which in all cases is bored larger than the diameter
of the piston or other rod.
In Figure 1 the plate D is so arranged that it either wholly or partly rests
inside the ring C, which is made broader than the packing material B to permit this
arrangement.
In Figure 2, the ring C is made with a slight projection or lip f which is cast on
the spring pockets. The plate D rests inside this projection.
In Figure 3, the plate D is made with a hole through which passes a stout pin E,
the latter being securely fastened in the ring C.
In Figure 4 the plate D is made with a slight projection on its periphery G, which
projection rests outside the ring C.
It will be seen that if the rod vibrates, it will first move the packing material D
laterally or vertically as the case may be, and the latter will communicate its motion
to the ring C. The plate D being in each case, so connected with the ring C that
both must move together, the lateral or vertical motion is communicated to the said
plate before it can come in contact with the piston or other rod. It must be distinctly
understood that I do not confine myself exclusively to the precise arrangements
Din Q1

page_text: shown in the drawings for connecting the encircling rings or pieces and the washers
or sliding plates, as I may use other equivalent means for connecting the rings C to
the plates D, so that both may be constrained to move together for the purpose
indicated.
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
In a metallic packing, the combination and use with a sliding or floating washer
plate of an arrangement to prevent such plate coming in contact with the piston or
other reciprocating rod, substantially as herein shown and described.
11
1 1
WM. BROOKES & SON,
55 & 56 Chancery Lane, London, Agents for the Applicant.