Improvements in and connected with Metallic Packings for Stuffing Boxes.
Year: 1895

page_text: Date of Application, 26th Apr., 1895-Accepted, 1st June, 1895
COMPLETE SPECIFICATION.
Improvements in and connected with Metallic Packings for
Stuffing Boxes.
We, BBOTSON THOMPSON, of 13, Livingstone Street, Springhead, in the
County of York, and JOHN LIVERSEDGE, of 101, Balfour Street, Oldham, in
the County of Lancaster, Engine Fitters, 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 has for its object to provide a metallic packing which can be
readily applied to any existing stuffing boxes, which is simple in construction and
more durable and efficient than those heretofore in use.
And in order that our invention may be more fully understood we have caused
to be appended hereunto one sheet of drawings marked with letters of reference
indicating like parts in the various figures.
Figs. 1 & 5 are longitudinal sections, Figs. 2 & 6 cross sections at lines A-B
and CD of Figs. 1 & 5 respectively of our improved metallic packing and
modifications thereof as applied to a stuffing box.
Figs. 3 & 4 are a side view and an end view respectively of the metallic packing
rings removed from the stuffing box.
Fig. 7 is an end view of the spring device shown in Fig. 5, and
Fig. 8 an end view of a modification of the packing rings.
C
In carrying out our invention and referring to the figures generally we employ
in the stuffing box a a casing or box made in two parts b, b', and adapted to receive
one or more sets of metallic packing rings c, c, and a spring d (or springs) in
compression between the latter, the said casing or box being internally formed
with a bevelled shoulder or shoulders e, e', against which the metallic rings c & e¹
are forced by the spring d and which cause the rings & c¹ to contract and always
bear closely around the rod f as they wear and thus form always a tight joint.
The box b, b', is placed against the shoulder a¹ of the stuffing box a and is kept
in position therein by means of the gland a³ which may be loose or secured
thereto.
Referring to Figs. 1, 2, 3 & 4, according to one form of our invention we fit the
box part b to the part b' in bayonet-joint fashion by forming the former with an
annular groove g and two slots h and the latter with lugs i adapted to pass through
the said slots and on being partially turned to engage in the groove g.
The rings c, c', are made in sections, as shown in Figs. 3 & 4, and secured
together by such as pins k, a space being provided between the said sections so as
to allow of contraction and the ends made to overlap each other so as to cover the
said space.
A suitable number of the rings c, c', are bevelled on their periphery to fit the bevel
of the shoulders e, e', in the box a whilst the periphery of one or more of the said
rings are formed straight, as shown in Figs. 1 & 3. The spring d employed to
force the packing rings c, e¹, against the bevelled shoulders e, e¹, in this case is a
spiral one but may be of any other convenient shape in compression.
Referring to Figs. 5, 6 & 7, according to another form of our invention, we make
the box b, b¹, in two halves longitudinally which may be secured together by such
as pins m, the respective edges being formed to overlap each other, see Fig. 6.
In this case the thrust upon the rings c, c, is effected by a number of springs d
attached to a hoop or ring n, see Fig. 7, also formed in two parts.

page_text: This form of packing box b, 61, and springs d facilitate the placing of the same
onto the rod f, as the latter need not be removed from the piston.
In lieu of the sectional packing rings c, c¹, described, for small diameter of rods
they may be formed in eccentric fashion with an opening or a split o³, as shown in
Fig. 8.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim, is-
"In and connected with metallic packings for stuffing boxes."
1st. The general construction and combination of parts operating substantially
as and for the purpose set forth..
2nd. In combination with a stuffing box, a casing or box b, b, having internally
two bevelled shoulders e, el, adapted to receive two sets of metallic packing rings c.cl
under the influence of a spring d (or springs) in compression which serve to force
the said rings against the said bevelled shoulders and the latter to contract the said
rings radially, substantially as and for the purpose set forth.
Dated thi. 05th dow of Anvil 1805-
F. BOSSHARDT & Co.,
4, Corporation Street, Manchester, Agents to Applicants.