Improvements in Engine Packing.
Year: 1891

page_text: Date of Application, 31st Oct., 1891
Complet: Specification Left, 2nd Aug., 1892-Accepted, 3rd Sept., .1892
PROVISIONAL SPECIFICATION.
Improvements in Engine Packing.
I, JAMES JOHNSON, Locomotive Superintendent, residing at 112, Leslie
Terrace, Aberdeen in the County of Aberdeen do hereby declare the nature of
this invention to be as follows:-
To provide an automatic steam-tight packing for the piston rods and valve
spindles of steam engines, which is done in this invention by arranging the stuffing-
box in such a manner that steam or water is introduced into a space in the stuffing-
box between two packing rings of soft metal, which are thereby pressed on to the
rod and against bevelled faces so that they are rendered steam tight.
A neck-ring or bush is fitted into one end of the stuffing-box having its inner
At the other end
end bevelled to receive a coned packing ring of soft metal.
of the stuffing-box a gland is fitted having its inner end bevelled in the same
as the neck-ring so as to receive a coned packing ring of soft
manner
metal also.
A spring is inserted between the packing rings to hold them in their proper
places.
こ
The space between the packing rings containing the spring forms a reservoir for
a lubricant and into which steam or water is brought from the boiler, or steam
from the steam-chest. The steam or water acting on the packing rings presses
them on to the rod and against the bevelled faces, and so they are rendered
steam tight.
The packing rings may be each in one piece or in segments; if the latter,
the segments are fitted together by a tongue and groove joint.
In the drawing which accompanys this Specification A is the stuffing-box;
B the piston rod or valve spindle; C the neck ring or bush; D and D coned
packing rings; E the gland; F the spring which keeps the packing rings in their
proper places; G the space between the packing rings forming a lubricant
or water is brought to the
reservoir; H the passage by which steam
stuffing-box.
.
L
October 1001
J. JOHNSON.
COMPLETE SPECIFICATION.
Improvements in Engine Packing.
I, JAMES JOHNSON, Locomotive Superintendent, formerly residing at 112 Leslie
Terrace, Aberdeen, but now of Beech Lodge, View Terrace, Rosemount, Aberdeen,
in the County of Aberdeen, 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 :-
The object of this invention is to provide improved automatic steam tight
packing for the piston rods and valve spindles of steam or fluid pressure engines.
For this purpose within a stuffing box through which the rod or spindle to be
packed works, is arranged packing rings of soft metal in such a manner that steam
or water under pressure can be introduced between them whereby they are forced
against conical or bevelled bearing surfaces pressed onto the piston rod or valve
spindle so as to form a fluid tight joint.
The packing rings are each coned or bevelled and fit close against the rod or
spindle after the manner of a sleeve. The said rings may be each in one piece or

page_text: :
:
in segments; in the latter case the segments are fitted together by a tongue and
groove or equivalent joint.
The stuffing box is fitted at one end with a neck ring or bush having its inner
end coned or bevelled to receive the coned portion of the corresponding packing
ring. At the other end of the stuffing box is a gland having its inner end or
sleeve similarly coned or bevelled to receive the coned portion of the other packing
ring. A spring is inserted between the packing rings to hold them in their proper
places.
The space between the inner ends of the packing rings into which steam or
water from the boiler, or steam from the steam-chest is introduced serves also as a
reservoir for lubricant.
The accompanying drawing is a longitudinal section of engine packing according
to this invention.
A is the stuffing box for a piston rod or valve spindle B. C Care packing
rings that may advantageously be of soft metal such as white metal. These rings
are each of conical form externally and are in the example shown each made in
segments dovetailed into each other as indicated in dotted lines. D is a neck ring
bush which may be of brass, and is coned internally to receive the coned portion
of the packing ring C. E is a gland or cover plate coned internally to receive the
coned portion of the packing ring C¹. F is a spring arranged between the packing
rings so as to keep them in place. The space G between the packing rings serves
as a lubricant reservoir. H is a passage by which steam or water under pressure
can be admitted to the interior of the stuffing box. I is a socket to which a
lubricator can be fixed. K is a ring of white metal onto which the neck ring beds
so as to form a tight joint.
The parts being arranged as shown, steam or water admitted to the interior of
the stuffing box under pressure, will act on the packing rings C C¹ and press them
onto the rod B and against the inner conical surfaces of the neck ring or bush D
and gland E respectively thereby forming a fluid tight packing.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. Engine packing wherein coned packing rings are arranged within a stuffing
box provided with an inlet for fluid under pressure and with conical or bevelled
bearing surfaces against which the packing rings can act, the arrangement being
such that when fluid under pressure is admitted to the stuffing box, the rings will
be pressed against a rod or spindle working through the stuffing box, and against
the conical bearing surfaces, and a fluid tight joint ensured substantially as
described.
2. My improved engine packing constructed arranged and operating substantially
as described. and:shown.
Dated this 30th day of July 1892.
J. JOHNSON.
W. Lloyd Wise,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.