Improvements in the Glands of Stuffing Boxes.
Year: 1891

page_text: Date of Application, 23rd Apr., 1891
Complete Specification Left, 8th Jan., 1892-Accepted, 13th Feb., 1892
PROVISIONAL SPECIFICATION.
Improvements in the Glands of Stuffing Boxes.
We, TANGYES LIMITED, of Cornwall Works Soho in the County of Stafford,
Engineers and JOHN NICHOLAS FLOYD of Cornwall Cottage Murdock Road,
Handsworth in the County of Stafford Mechanical Engineer do hereby declare the
nature of this invention to be as follows:-
The said invention consists of the improvements hereinafter described in
constructing the glands of stuffing boxes by which improvements the friction
and wear attendant on glands of the ordinary construction are wholly or in great
part avoided.
In order that the said invention may be the better understood we remark that
the gland of a stuffing box consists of a tubular part which enters the stuffing box
and which being pressed therein compresses the packing material in the said stuffing
box and produces a tight joint and a cross piece or follower surmounting the said
tubular part the said follower having near each end a hole through which holes the
screw bolts for pressing down the gland pass. The screw nuts working in the
screwed ends of the screw bolts bear on the follower and by tightening the said
Unless
nuts the gland is pressed with the required force into the stuffing box.
the screw nuts are made simultaneously to advance on their respective screw bolts
the gland is pressed obliquely in the stuffing box and friction and wear of the
parts result.
The said invention consists in making the gland in two parts one of the said
parts consisting of the tubular portion of the gland that is the part entering the
stuffing box and the other of the said parts consisting of the follower. The said
two parts of the gland are constructed as follows. The tubular part has a flange
at top and the follower has on its underside two projections situated at opposite
points of the circular opening at its middle. These projections are preferably
curved or rounded.
When
The improved gland is used as follows. The tubular part being placed in the
stuffing box the follower is placed upon it the projections on the underside of the
follower bearing at opposite points on the flange of the tubular part.
the screw nuts by which the follower is pressed down are tightened on the screw
bolts the pressure is transmitted through the projections on the underside of the
follower to the tubular part of the gland any obliquity in the follower produced by
the unequal advance of the screw nuts is unattended by obliquity in the tubular
part of the gland as occurs when the follower and tubular part are made in one
piece. If the projections on the underside of the follower have the figure of knife
edges the obliquity of the follower has no tendency at all to produce oblique motion
in the tubular part of the gland and if the said projections are rounded obliquity in
the follower produce a slight rolling of the projections on the flange of the tubular
part but the direct pressure of the follower on the tubular part of the gland is not
materially affected. Shallow recesses may be made in the flange of the tubular
part for the projections on the follower to engage in; but these recesses are not
essential.
:
The parts connecting the follower and tubular part of the gland may be
reversed; that is the projections may be made on the flange of the tubular part
and the recesses for the projections to engage in made in the underside of the
follower. The tubular part of the gland is made preferably of antifriction metal
or alloy.
W. T. WHITEMAN,
Agent for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in the Glands of Stuffing Boxes.
We, TANGYES LIMITED, of Cornwall Works, Soho, in the County of Stafford,
Engineers, and JOHN NICHOLAS FLOYD, of Cornwall Cottage, Murdock Road,
Handsworth, in the County of Stafford, Mechanical Engineer, do hereby declare
the nature of the said invention and in what manner the same is to be performed
to be particularly described and ascertained in and by the following statement :—
The said invention consists of the improvements hereinafter described in
constructing the glands of stuffing boxes, by which improvements the friction and
wear attendant on glands of the ordinary construction are wholly or in great
part avoided.
In order that the said invention may be the better understood we remark that
the gland of a stuffing box consists of a tubular part which enters the stuffing box
and which being pressed therein compresses the packing material in the said stuffing
box and produces a tight joint, and a cross piece or follower surmounting the said
tubular part the said follower having near each end a hole through which holes
the screw bolts for pressing down the gland pass. The screw nuts working on the
screwed ends of the screw bolts bear on the follower and by tightening the said
nuts the gland is pressed with the required force into the stuffing box. Unless the
screw nuts are made simultaneously to advance on their respective screw bolts
the gland is pressed obliquely in the stuffing box and friction and wear of the
parts result.
The said invention consists in making the gland in two parts, one of the said
parts consisting of the tubular portion of the gland, that is, the part entering the
stuffing box and the other of the said parts consisting of the follower. The said
two parts of the gland are constructed as follows. The tubular part has a flange
at top and the follower has on its underside two projections situated at opposite.
points of the circular opening at its middle. These projections are preferably
curved or rounded.
When
The improved gland is used as follows. The tubular part being placed in the
stuffing box, the follower is placed upon it the projections on the underside of the
follower bearing at opposite points on the flange of the tubular part.
the screw nuts by which the follower is pressed down are tightened on the screw
bolts the pressure is transmitted through the projections on the underside of the
follower to the tubular part of the gland, any obliquity in the follower produced by
the unequal advance of the screw nuts is unattended by obliquity in the tubular
part of the gland, as occurs when the follower and tubular part are made in one
piece. If the projections on the underside of the follower have the figure of knife
edges the obliquity of the follower has no tendency at all to produce oblique motion
in the tubular part of the gland; and if the said projections are rounded obliquity
in the follower produces a slight rolling of the projections on the flange of the
tubular part but the direct pressure of the follower on the tubular part of the
gland is not materially affected. Shallow recesses may be made in the flange
of the tubular part for the projections on the follower to engage in; but these
recesses are not essential.
The parts connecting the follower and tubular part of the gland may be
reversed; that is the projections may be made on the flange on the tubular
part and the recesses for the projections to engage in, made in the underside of the
follower but the separate parts of the gland may be made without projections,
that is to say, the follower is made flat on its underside and bears upon the flat
flange or flat top of the tubular part.
The tubular part of the gland is made preferably of antifriction metal or alloy.
Figure 1 of the accompanying drawing represents in vertical section, a stuffing
box the gland of which is constructed according to this invention;

page_text: Figure 2 represents a plan of the separate follower of the gland and
Figure 3 represents a plan of the separate tubular part of the gland.
The same letters of reference indicate the same parts in the several figures of
the drawing.
a is the fixed stuffing box containing the packing and b and c are the two parts
of the gland made separate from one another, being the separate tubular part of the
gland which enters the stuffing box and presses upon the packing therein and the
separate follower of the gland; d d are the screw bolts and d² 2 the screw nuts on
their upper ends by which the separate follower c is secured to and the tubular
part forced into the stuffing box a; e is the piston rod working in the stuffing
box. It will be seen by reference to the drawing that the tubular part of the
gland has a flange at top and the follower of the gland has on its underside two
projections, situated at opposite points of the circular opening at its middle.
These projections are preferably curved or rounded as seen in Figure 1.
The parts of the gland are arranged in the stuffing box in the following
manner.
b
The separate tubular part having been placed in the stuffing box a, the
follower " e is placed upon it, the projections of the follower bearing at opposite
points on the flange 62 of the tubular part and the holes at its ends passing over
the screwed tops of the screw bolts d d. The screw nuts d² are now placed upon
the screw bolts d d and tightened thereon so as to press down the follower c, the
pressure being transmitted through the projections on its underside to the
tubular part of the gland. It will be understood by an examination of the drawing
that any obliquity in the separate follower c, produced by the unequal advance of
the screw nuts d, d² is unattended by obliquity in the tubular part b, of the gland
as occurs when the follower and tubular part are made in one piece.
Figure 4 represents in vertical section a stuffing box constructed according to
this invention in which the projections on the underside of the separate follower of
the gland have the figure of knife edges and Figure 5 represents a plan of the
follower. A section through one of the knife edges of the follower is represented
in connection with Figure 4. The said knife edges on the underside of the
follower c and situated at opposite points of the circular opening in the middle
of the follower, are marked c³ and their position and shape are shown in the
drawing.
The flange b2 of the tubular part b may be provided with shallow recesses for the
knife edged projections of the follower to engage with.
When pressure is put upon the follower, its knife edge bearing parts c³ ³ advance
the tubular part in the stuffing box a without any oblique action on the said
tubular part; and if the knife edged bearing parts c³, be rounded, obliquity in
the follower produces a slight rolling of the said bearing parts or projections on the
flange of the tubular part of the gland, but the direct pressure of the follower is
not materially affected.
In the arrangement Figures 4 and 5 we have represented the follower c
provided on its underside and at opposite points with hooks, for engaging under
the flange on the top of the tubular part of the gland. By means of these
hooks the tubular part of the gland can be removed from the stuffing box at
the same time that the separate follower c is withdrawn from off the screw bolts.
When the follower is in its normal position on the top of the tubular part the
hooks f, have no action upon the said tubular part.
Figure 6 represents in vertical section a gland constructed according to a modifi-
cation of this invention.
Figure 7 represents a plan of the follower and
Figure 8 the tubular part of the gland.
In this modification the underside of the separate follower c is flat and the upper
side of the flange 6 of the tubular part b is provided with curved projections 6 at
opposite points (see Figure 8) for the flat follower c to bear upon. The action of

page_text: this arrangement is the same as those previously described and corresponding parts
are marked with the same letters of reference.
Figure 9 represents in vertical section another stuffing box constructed according
to this invention;
Figure 10 is a plan of the follower and Figure 11 is a plan of the tubular part of
the same.
In this stuffing box the two projections on the underside of the separate follower c
are flat instead of curved as in the arrangement Figures 1 and 2, the flat projections
of the follower Figures 9 and 10 bearing upon the Hat flange 62 of the tubular part b
of the gland. But the underside of the follower e and the upper side of the flange 12 of
the tubular part of the gland may be without projections; that is, a follower
flat on its underside as represented in Figure 6 may be used with a flat flange on
the tubular part as represented in Figure 1; or the tubular part of the gland may
be without a flange.
b
Having now particularly described and ascertained the nature of the said
invention and the manner in which the same is to be performed we declare that
we claim as the said invention of " Improvements in the glands of stuffing
'boxes" :-
the
Making the tubular part and the follower of the gland of separate parts for
purpose of preventing any obliquity in the follower being transmitted to the
tubular part of the gland substantially as hereinbefore described and illustrated in
the accompanying drawing; whether either the separate follower or the separate
tubular part be provided with projections or the follower and tubular part be flat.
or without projections on their bearing surfaces as before described.
Dated the Seventh day of January 1892.
TANGYES LIMITED,
W. J. Parkins, Secretary.
JOHN NICHOLAS FLOYD.