Improvements in Metallic Packing for Piston Rods, Valve Rods, and the like.
Year: 1898

page_text: Date of Application, 1st Dec., 1898
Complete Specification Left, 31st Aug., 1899-Accepted, 21st Oct., 1899
Date of Application, 1st Dec., 1898
Complete Specification Left, 31st Aug., 1899-Accepted, 21st Oct., 1899
PROVISIONAL SPECIFICATION.
!
Improvements in Metallic Packing for Piston Rods, Valve Rods,
and the like.
We, ANDREW SHAW, of 87, Greenwood Terrace, St. Margaret's Road, Bradford,
in the County of York, Engineer, and ASA BLAND, of 34, Clayton Heights, near
Bradford, aforesaid, Engineer, do hereby declare the nature of this invention
to be as follows:-
This invention refers to improvements in metallic packing for piston rods,
valve rods, and the like, our improved packing being especially applicable for
packing Corliss valve spindles, though it may be applied to the packing of any
other form of rod.
In constructing a packing according to our invention we employ a suitable
form of outer casing against the inner side of one end of which we place an
annular ring with a spherical or curved face which engages a corresponding face
on the casing so as to form a ball and socket joint which permits the packing
to adjust itself to irregularities in the lie of the rod. Against the straight face
of the inner side of the ball ring we place a cup surrounding the rod and being
hollowed out in a conical or wedge shaped manner so as to receive three or any
suitable number of packing rings. The inner conical surface of the cap may be
of any suitable taper.
In metallic packings of this description as previously constructed the inner
face of the cup has been bevilled at its end and the face of the packing ring
working against same has been bevilled to correspond. This method of construc-
tion has been found objectionable and according to our invention we construct
the inner face of the cup at right angles with the rod and the face of the packing
ring working against same is made to correspond. The opposite face of this
first packing ring is made bevilled and the adjoining face of the second packing
ring is bevilled to correspond. Any suitable angle of bevil may be employed.
This arrangement of a cup with a flat face at the end and a bevilled packing
ring is a great advantage, as, if the rings are wearing away too fast they can be
removed and new ones substituted and the angle of the bevil may be altered as
required without necessitating a new cup as has previously been the case which
is a great saving of time and expense.
The packing rings are split so as to allow them to fit tightly against the rod
and cup, the joints of the rings being arranged so as not to come opposite each
other and pins are employed to prevent the rotation of the rings by friction
with each other.
86
The packing rings are pressed down the conical cup by means of a suitable
following ring" acted upon by springs as is customary.
Our invention also comprises certain improvements relating to the spring holder.
We employ primarily an annular ring encircling the rod and provided with two
or more bevilled slots into which are adapted to enter two or more corresponding
projections formed on the rear of the spring holder proper. The spring holder
is made in two halves and is secured to the annular ring by means of screws, which
on being tightened up force the projections on the spring holder into the bevilled

page_text: slots in the annular ring and thus bind or secure the spring holder to the rod.
The face of the spring holder is provided with two or more pins or projections
adapted to enter and slide in recesses formed in the "following ring." The conical
cup before mentioned is provided with pins which enter and slide in longitudinal
slots or recesses on the "following ring," and the outer packing ring is pinned
to the "following ring" so that when the spring holder, which is clamped or
secured to the rod, rotates with said rod as is the case with Corliss valve spindles,
then the whole packing rotates inside the casing, and bearing against the inner
flat face of the ball ring.
If desired, the spring holder, instead of being attached to a slotted annular
ring as described, may be formed in two halves or in sections and clamped to the
rod by means of a strong spring, or the spring holder may be made whole and
secured to the rod by means of a key.
Another part of our invention relates to the method of constructing the block
plates against which the springs act to force the packing blocks against the rod,
and between which the blocks are inserted. Our invention consists in forming
said block plates in the form of an annular L ring. The said ring may be pro-
vided with pockets if desired for the springs to rest in. The meeting edges of
these annular rings, when placed in position, may be provided with claws or
projections to prevent rotation. The second course of packing blocks in this form
of packing may consist of two blocks semicircular in shape instead of employing
four blocks as hitherto. By forming the block plates in the form of annular
rings the inrush of steam forcing the blocks against the rod is broken, the
inrush of steam into the casing having hitherto caused uneven wear of the blocks.
Another part of our invention refers to the method of packing described and
shewn in the Specification of Letters Patent No. 15922 of 1898 granted to Asa
Bland, one of the present applicants, and our invention consists in forming the
disc therein described to receive two packing blocks, but the blocks in this case
cach encircle one half of the rod instead of a section of said rod as hitherto. This
form of packing may be made in two or any number of chambers as found
necessary to efficiently prevent leakage of steam.
The from of spring we prefer to employ in our improved methods of packing
is what is known as a "
vulture" spring, that is, a spring in which the coils grow
gradually smaller so that on compression the spring closes up flat, but any ordinary
form of spiral spring may be employed if desired.
Dated this 30th day of Novemba
1000
TASKER & CROSSLEY,
Patent Agents, Halifax,
Agents for Applicants.
Improvements in Metallic Packing for Piston Rods, Valve Rods,
and the like.
We, ANDREW SHAW, of 87, Grenwood Terrace, St. Margaret's Road, Bradford,
in the County of York, Engineer, and .ASA BLAND, of 34, Clayton Heights, near
Bradford, aforesaid, 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:-
This invention relates to improvements in metallic packing for piston rods,
valve rods, and the like. In constructing a packing according to our invention
we employ a suitable form of outer casing against the inner side of one end of
which we place an annular ring with a spherical or curved face, which engages

page_text: a corresponding face on the casing, so as to form a ball and socket joint which
permits the packing to adjust itself to irregularities in the movement of the
rod. Against the straight face of the inner side of the ball ring we place a cup
surrounding the rod, and being hollowed out in a conical or wedged shaped
manner so as to receive three or any suitable number of packing rings. The
inner conical surface of the cup may be of any suitable taper. In metallic
packings of this description as previously constructed, the inner face of the cup
has been bevilled at its end and the face of the packing ring working against
same has been bevilled to correspond. This method of construction has been
found objectionable, and according to our invention we construct the inner face
of the cup at right angles with the rod, and the face of the packing ring working
against same is made to correspond. Any suitable angle of bevil may be
employed.
This arrangement of a cup with a flat face at the end and a bevilled packing
ring or rings is a great advantage as if the rings are wearing away too fast they
can be removed and new ones substituted and the angle of the bevil may be altered
as required without necessitating a new cup as has previously been the case which
is a great saving of time and expense.
The packing rings are split so as to allow them to fit tightly against the rod
and cup, the joints of the rings being arranged so as not to come opposite each
other and pins are employed to prevent the rotation of the rings by friction with
each other. The packing rings are pressed down the conical cup by means of
a suitable following ring acted upon by springs as is customary. Another part
of our invention relates to the method of constructing the block plates against
which the springs act to force the packing blocks against the rod, and between
which the blocks are inserted. Our invention consists in forming said block
plates in the form of an L ring. The said ring may be provided with pockets
if desired for the springs to rest in. By forming the block plates in the form
of annular rings the inrush of steam forcing the blocks against the rods is
broken, the inrush of steam into the casing having hitherto caused uneven wear
of the blocks. A further advantage gained by the employment of these block
plates is that there is no danger of their coming into contact with the rod, as
they are supported by the blocks and springs.
In the accompanying drawings illustrating our invention Fig. 1 is sectional
elevation of our improved cup and packing rings, and Fig. 2. is end view of same.
Figs. 3, 4, and 5 are sectional elevations shewing different forms of packing to
which our invention may be applied. Fig. 6 is sectional elevation of a metallic
packing shewing the application of our rings for holding the packing blocks.
Fig. 7 shews a front view of an L ring with the blocks and springs for forcing
said blocks against the rod, and Fig. 8 is side view of Fig. 7.
Referring to the drawings, 1 represents our improved cup; having a flat or
straight base 1 at right angles with the axis of the rod. This cup is adapted
to receive three packing rings 2, 3, and 4 although any higher number may be
employed if desired and to suit requirements. The ring 2 is made with the face
engaging the inner end surface of the cup, straight to correspond with the said
inner end face, and the opposite face of said ring 2 is bevilled preferably at about
right angles to the inner conical surface of the cup. The angle of the conical
surface of the cup, and the angle of bevil given to the rings may vary to suit
requirements 15 to 20 degrees being found a convenient angle for the taper
of the cup. The inner face of the packing ring 3 is bevilled to correspond with
the outer face of the ring 2, against which it works, and the opposing or outer
face of the ring 3 is made straight or at right angles to the axis of the rod. The
formation of a cup with the inner end face at right angles with the axis of the
rod, and the employment of packing rings bevilled in the manner described is
a great advantage as if the rings are wearing away too fast or vice versa, they can
be removed and new rings with a different angle of bevil may be substituted with-
out necessitating a new cup as has previously been the case. The rings are split

page_text: as. shewn at 21, 3, and 4; in Fig. 2, so as to make tight joints with, the cup and
rod, and the cut portions are arranged to come across each other as shewn....If
found necessary pins may be employed to prevent rotation of the rings by friction
one with another. Fig. 3 shews one form of application of our improved cup
and packing rings. In this form of packing the rings are pressed down the cup
by means of a following ring 7 acted upon by a spiral spring 8 in the ordinary
manner. To allow for irregularities in the movement of the rod, we employ a
ring 9 against one flat face of which the cup 1 bears, the opposite face of said
ring being partly spherical or curved, and working against a corresponding
hollowed out face on the inner side of the casing 10. This ball ring, as we term
it, permits the packing to adjust itself to any irregular movement of the rod.
Fig. 4 shews an arrangement of packing in which two cups and sets of rings are
employed, a spiral spring 11 acting to press the rings down the cups, and tending
to force the cups apart against the rings 9 and 12. Fig. 5 shews another arrange-
ment, in which two extra packing rings 5 and 6 are employed. The outer face
of the ring 6 is bevilled as shewn and the following ring 7 is bevilled in a similar
manner. The angle of bevil may vary as found desirable. In this case an extra
following ring 13 is inserted and small spiral springs 14 carried in recesses in
a spring holder 15 are employed to press the rings down the cup. Fig. 6 shews
an arrangement of metallic packing having applied thereto our rings 16 for
holding the packing blocks 17. In the arrangement shewn two of these L, rings
with their packing blocks are employed with their open faces abutting, a ring 18
being employed between the said L rings to prevent the springs 19 (of which
any suitable number may be employed) which force the packing blocks 17
against the rod from getting displaced. The L rings are pressed together and
against the spherical ring 8 by following ring 7 and springs 14.
こ Fig. shews a front view of one ring 16. The said ring is formed with
pockets 1¹ for the reception of the springs 19. Fig. 8 is a side view of the ring 16.
It will be understood that we do not claim the arrangements of packing herein
described and shewn in the drawings except in so much as expressly set forth
in the claims hereunto attached, and further we would have it understood that
our invention may be applied to any suitable form of packing and in any
convenient manner and that the same may be altered in detail without departing
from the scope of our invention.
Having now particularly described and ascertained the nature of our said
invention, and in what manner the same is to be performed, we declare that what
we claim is:-
(1) In metallic packings for piston rods, valve rods, and the like the combination
with a conical cup such as 1, having its inner end face at right angles to the axis
of the rod, of packing rings such as 2 and 3 with their meeting faces suitably
bevilled, all arranged and constructed substantially as shewn in the drawings
and herein described.
(2) In metallic packings for piston rods, valve rods, and the like the employ-
ment of an ring or rings to receive the packing blocks and having pockets
to receive the springs by which said blocks are forced against the rods, sub-
stantially as herein shewn and described.
Dated this 30th day of August 1899.
TASKER & CROSSLEY,
Patent Agents, Halifax, Agents for Applicants.