Year: 1899

page_text: Date of Application, 10th May, 1899
Complete Specification Left, 9th Feb., 1900-Accepted, 17th Mar., 1900
I, EDMOND TESSIER, of 54, Rue de la Bastille, Nantes (Loire-Inférieure), in the
Republic of France, do hereby declare the nature of this invention to be as
follows:-
My invention has for its object a stuffing box which can oscillate and move in
a box or recess in the cylinder cover or the like to which the stuffing box is fitted in
such a manner that it can follow any movements which the piston rod may have due
to imperfect erection or to the slight displacement of the theoretical axis of the said
rod through wear.
My stuffing box comprises chiefly a box or casing which is independent of the
usual box or recess formed in the cylinder cover or the like and which is provided
with a collar of suitable shape; this collar rests, similarly to a valve upon its
seat, upon a movable ring of metal, for example brass, antifriction metal or any
other suitable material, which ring can move laterally in such a manner that
the stuffing box takes its support upon this seating and can oscillate upon it
whilst at the same time making a tight contact, producing a hermetic joint and
preventing any loss of steam or other fluid under pressure through the said stuffing
box.
In order that there shall always be good contact between the circular collar or
ring of the stuffing box and the metal or other ring upon which it rests I may
employ a spring where the stuffing box is to be fitted to a machine the operation
of which will necessitate the employment of a pressure lower than that of the
atmosphere.
In carrying out the invention I advantageously form in the cylinder cover or
the like a box or recess, the diameter of which, with respect to that of the piston
rod, is larger than is usual. The length or depth of this recess, however, is less
than is usual, my improved oscillating stuffing box on account of its movability
ensuring a hermetic joint between the piston and the packing of the stuffing box
with a much less length or depth than that of ordinary stuffing boxes.
The circular hole formed in the cylinder cover provides sufficient play to permit
of the free movement and displacement of the rod.
The inner end of the stuffing box is fitted as closely as possible upon the piston
rod and in the opposite end of the said box there is inserted a ring: the packing
designed to ensure tightness of the joint is held and compressed between the inner
end or bottom of the stuffing box and the said ring.
The stuffing box is provided at about the middle of its length with a circular
collar or ring, the lower face of which (that is to say, the face which is farthest
from the cylinder) is rounded so that it can be applied against a ring of metal or
other suitable material, the upper face of which can be either concave or convex
according as the face of the collar is convex or concave so that the two parts can
it together to form a tight joint.
The movable ring rests upon a socket ring which is fitted upon or into the box
or recess in the evlinder cover or the like. This socket ring is rigidly connected

page_text: to a ring or the like which is applied against the face of the cylinder box and is
fixed in position by means of studs and nuts.
The gland of the stuffing box is pressed against the packing by means of nuts
or studs screwed into a flange screwed upon the outside of the box. A spring can, if
desired, be arranged between the flange and the socket ring for ensuring a good
contact between the collar and the ring upon which it rests. Instead of employing
the above described method of securing the gland in position I can employ a
cap which is screwed upon the stuffing box and is applied against the gland so that
the latter is tightened up by screwing up the cap.
My oscillating stuffing box can be easily applied to apparatus in general
requiring stuffing boxes and also to existing stuffing boxes and I can greatly reduce
the dimensions of stuffing boxes where desirable.
As hereinbefore mentioned the collar acts in conjunction with the movable ring,
and the socket ring as a valve, upon its seat only having a certain movement and
the contact being rendered tight by the pressure exerted by the fluid contained
in the cylinder, the stuffing box can-oscillate or move slightly between the collar
and the movable ring which acts as a pivot so that the stuffing box yields to
irregularities in the motion of the piston rod.
Dated the 10th day of May 1899.
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.
I, EDMOND TESSIER, of 54, Rue de la Bastille, Nantes (Loire-Inférieure), in the
Republic of France, 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 invention has for its object a stuffing box which can oscillate and move in
a box or recess in the cylinder cover or the like to which the stuffing box is fitted in
such a manner that it can follow any movements which the piston rod may have due
to imperfect erection or to the slight displacement of the theoretical axis of the said
rod through wear.
My stuffing box comprises chiefly a box or casing which is independent of the
usual box or recess formed in the cylinder cover or the like and which is provided
with a collar of suitable shape; this collar rests, similarly to a valve upon its
seat, upon a movable ring of metal, for example brass, antifriction metal or any
other suitable material, which ring can move laterally in such a manner that
the stuffing box takes its support upon this seating and can oscillate upon it
whilst at the same time making a tight contact, producing a hermetic joint and
preventing any loss of steam or other fluid under pressure through the said stuffing
box.
In order that there shall always be good contact between the circular collar or
ring of the stuffing box and the metal or other ring upon which it rests I may
employ a spring, particularly in cases where the stuffing box is to be fitted to
a machine the operation of which will necessitate the employment of a pressure
lower than that of the atmosphere.
To enable my invention to be fully understood I will describe how it can be
carried into practice by reference to the accompanying drawing, in which
Figure is a vertical section of a stuffing box constructed according to my inven
tion, and

page_text: Figure 2 is a similar view illustrating a modification.
In these two figures the right and left hand sides are different, each arrangement
constituting a modification.
Figures 3 and 4 are vertical sections illustrating two other arrangements with
spring.
In carrying out the invention as shewn in Figures 1, 2 and 4 I advantageously
form in the cylinder cover A or the like a box or recess B, the diameter of which,
with respect to that of the piston rod, is larger than is usual. The length or
depth of this recess, however, is less than is usual, my improved oscillating stuffing
box on account of its movability ensuring a hermetic joint between the piston
rod and the packing of the stuffing box with a much less length or depth than
that of ordinary stuffing boxes.
The circular hole o.formed in the cylinder cover provides sufficient play to permit
of the free oscillation and displacement of the rod.
The inner enda of the stuffing box C is fitted as closely as possible upon the
piston rod, and in the opposite end of the said box there is inserted a ring D;
the packing designed to ensure tightness of the joint is held and compressed
between the inner end or bottom a of the stuffing box and the ring D. (It is
not shewn in the drawing.)
The stuffing box C is provided at about the middle of its length (as shewn in
Figures 1 and 2) or nearer the inner end or bottom of the cylinder cover (as
shewn in Figures 3 and 4) with a circular collar or ring the lower face of which
(that is to say, the face which is farthest from the cylinder) is rounded so that
it can be applied against a ring e of metal or other suitable material, the upper
face of which can be either concave or convex according as the face of the collar b
is convex, or concave so that the two parts can fit together to form a tight joint."
The movable ring e rests upon a socket ring E.which is fitted upon the box
or recess B of the cylinder cover (Figures 2 and 4) or on the bottom of the
cylinder (Figure 3). This socket ring is provided with a flange with which it.
bears against the flat edge of the box or recess or against the bottom of the
cylinder it is secured by means of studs e screwed into the metal of the bottom
of the cylinder or of the plate and upon which the nuts are screwed.
The gland of the stuffing box is pressed against the packing by means of
studs screwed into the flange of the stuffing box C (as shewn at the right
hand side of Figures 1 and 2 and Figures 3 and 4) and of nuts . The flange l
of the box C is not cast therewith in order to allow the introduction of the movable
ringe of the socket ring E as well as of the spring r. This spring (which can be
dispensed with if required) serves to ensure a good contact between the circular
collar and the ringe upon which it rests. The flange his screw threaded
internally and screws over the screw threaded end of the stuffing box C.
Instead of employing the above described method of securing the gland in
position I can employ that illustrated at the left hand side of Figures 1 and 2
and which consists of a cap F which is screwed upon the stuffing box Cand is
applied against the gland D so that the latter is tightened up by screwing up
the cap.
In certain kinds of steam engines, especially in condensing engines, it may
happen that the casing of the stuffing box becomes drawn towards the interior of
the cylinder and to a slight degree leaves its seat which would give rise to a loss
of steam.
In order to obviate this objection I arrange a suitable number of springs
(Figure 3) in suitable recesses k. the object of which is to draw the casing of the
stuffing box C outwards or to keep it to its seat so as to preserve a perfectly
hermetical and tight joint between the collar and the ring c.
Figure 4 shews a modification in which one or more circular springs 7 are
employed placed in suitable recesses k; or they may be simply placed between
the two flanges E and h.
As hereinbefore mentioned the collar acts in conjunction with the movable

page_text: ringe and the socket ring or flange E like a yalve upon its seat having only a
limited movement, the contact being rendered tight by the pressure exerted by
the fluid contained in the cylinder; the stuffing box can slightly oscillate or move
between the collar and the movable ring which acts as a pivot so that the stuffing
box yields to irregularities in the motion of the piston rod.
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 herein described oscillating stuffing box comprising in the interior of the
box or recess formed in the cylinder cover an independent stuffing box which bears
by means of a collar upon a movable ring and upon a socket, similarly to a valve
upon its seat, and which ensures a hermetic joint whilst at the same time per-
mitting of the movement of the stuffing box, an external spring being sometimes
employed acting behind the nut or the flange of the stuffing box for preventing
the latter from being drawn inside and giving rise to a loss of steam, substantially
as set forth.
ת .
CT1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London,
Agents for the Applicant.