and for other Purposes.
Year: 1888

page_text: and for other Purposes.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, in the County of Middlesex 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 valves for air-compressors, which valves are also applicable
to other purposes where the valve is liable to "hammer."
In valves for air compressors, and for other purposes, where a heavy pressure comes
upon the back of the same, the valve after having been opened, and the power which
opened it released, the said valve necessarily flies to its seat under a great force, and
striking hard thereon, produces what is commonly called "hammer." The instan-
taneous closing of the valve is essential to its proper working, and to ensure such
instantaneous closing a spring is applied, the tendency of which is to yieldingly hold
the valve upon its seat. The result of such hammer is to injure or abrade the face of
the valve or valve-seat, so that these faces require frequent grinding or repair.
Again, this hammer produces a heavy jar upon the valve-case, such jar tending to
loosen the screw connections of the case, such as the cap by which the said case is
closed.
The seats of these valves are usually made removable from the valve case, to
facilitate such repairs.
In suction valves the hammer of the valve necessarily tends to throw the valve-seat
out of place.
In the more general construction of this class of valves, the valve is constructed
with a spindle concentric with its seat, which serves as a guide for the movement of

page_text: the valve. The end of the spindle opposite the valve is provided with a collar, and
usually with a screw nut against which the spring bears.
The hammer of the valve produces such a jar upon the stem that the nut is
frequently loosened. Various devices are employed to prevent this movable nut and
collar from disadjustment under such hammer.
Again, in the usual construction of this class of valves, the valve-seat-ring is made
separate from the case, but set therein, so that the valve may rest upon the seat so
introduced, the valve-seat being upon one side of the inlet or outlet passage, as the
case may be, and upon the opposite side of that passage a second ring is arranged in
the case, connected to the valve-seat ring, so as to form what is commonly called a
"valve-cage," the central tube for the guiding of the spindle being made an integral
part of the cage, it is therefore necessary that the collar on the end of the valve-stem
shall be removable in order to permit the introduction of the valve stem through the
guiding-tube.
The object of this invention is to construct the valve spindle with the before
mentioned collar as an integral part thereof, so as to avoid its displacement by
"hammer" and also to overcome the difficulties mentioned in the prior constructions.
In the accompanying drawings,
Figure 1 represents a vertical section showing the valve and its spindle in half
side view, the section cutting at right angles to the division of the guide ring and
tube.
Figure 2 is a side view of the valve seat ring showing it in half vertical section and
the guide ring and tube detached therefrom.
Figure 3 is a top view of the guide ring and its tube showing the division.
Figure 4 is a vertical central section of a globe valve embodying the invention, but
showing the valve seat ring with the guide ring above as undivided, and connected
with and so as to become an integral part of the valve-seat ring and valve, and without
the division of the guide ring as in the previous figures.
Figure 5 is a modification in the application of the cap.
In describing the invention, I will do so with reference to an inlet valve, as seen in
Figure 1, in which A represents the case, B the valve-seat, which is of ring-shape, and
supported in the case, and so that the valve C may rest upon the seat. D represents
the second ring of the valve cage, but instead of making the ring D and the valve-
seat-ring B integral the one with the other, the seat ring is made separate from the
other portion of the cage, as seen in Figure 2, and it is simply a ring seated in the
case, it being preferably of frustum or cone shape, and the bearing surface in the case
for the ring of corresponding shape. The interior of the case above the ring is of
larger diameter than the ring, open at the top, so that the ring may be introduced
from the top downward. The ring B stands below the inlet opening, and the second
ring D of the valve cage above the inlet opening.
The ring D is constructed with a central tube E as a guide for the valve spindle,
but this ring D is divided in the plane of its axis into two parts D and D¹, as
indicated in Figures 2 and 3, the line F indicating the division between the two
parts.
From the parts of the ring D wings G extend toward the ring B, and are
constructed with shoulders H to rest upon the valve-seat-ring, as seen in Figures 1
and 2, so that when the two parts D D¹ of the guide ring are in place, the wings
form a connection between the guide ring and the valve-seat-ring, and make the valve
cage.
The valve C is constructed with a valve-stem I, which extends through the
tubular guide E, but longer than that tube, so as to permit the requisite play of the
valve.
The end of the spindle opposite the valve is upset to form a collar J integral with
the spindle, and this collar is of larger diameter than the guide tube, so as to form a
bearing for the one end of a spring K, the other end of the spring K supported from
the guide-ring D below.

page_text: To introduce the cage and valve to place, the two parts of the guide portion of the
cage are set around the spindle, then the spring is worked onto the spindle over the
collar; this is easily done, because the spring is so elastic as to permit its convolu-
tions to be opened so as to work over the collar to its place under the collar, something
like the operation of a screw, the valve-seat-ring having also been placed on the
valve and against the shoulders of the respective wings. Thus assembled the cage and
valve are set into their place in the case, and the cap M applied.
Whenever it is necessary to remove the valve and its seat, as for the purpose of'
grinding or refacing the operation is reversed.
By making the spring bearing collar of the spindle an integral part of the spindle,
all possibility of disadjustment of the collar by the hammer of the valve is
avoided.
The upper end of the case is internally screw-threaded, and the cap M is corre-
spondingly screw-threaded so as to be screwed into the upper end of the case over the
spindle. The screw-threaded portion of the case is of larger diameter than the
external diameter of the ring D, so as to form an annular shoulder N upon the inside
of the case, and the ring D is constructed with a like shoulder O so that the lower
edge P of the cap stands over the said two shoulders, as clearly seen in Figure 1.
Upon the said two shoulders a packing ring R is arranged, preferably of soft metal,
such as copper, the width of the ring is less than the combined width of the two
shoulders, but so as to rest over and cover the joint between the two shoulders without
coming into contact with either side.
After the valve has been properly set in place, the packing ring R is introduced,
and then the cap screwed into the said packing ring to force it hard upon the
shoulders of the ring D and of the case; this operation brings the valve-seat-ring B
firmly into its seat and this done, the packing ring R not only securely closes the
joint from the valve chamber upward, but owing to the nature of the material of
which it is composed, it forms a non-conductor of "hammer" to the cap and case.
The whole resistance of the hammer comes upon the packing, and that being a non-
conductor the shock of such hammer upon the cap and case is very materially reduced
from what it would be with a bard metal connection between the valve and case, as in
the usual construction.
The shoulders NO are best made inclined to each other, so as to form a V-shaped
recess between the case and the disc in which the packing will rest. This V-shaped
recess insures the proper concentric location of the packing, and also insures a firm
contact between the packing and the two shoulders. The ring D is also best made
with an annular lip $ extending up from its shoulder O inside the cap, so as to
extend the recess between the ring and case to a point above the lower edge of the
cap, this is particularly desirable, as in many cases a soft packing is used temporarily
or otherwise such say as wicking, then the groove formed by the lip S affords a con-
venient receptacle for the introduction of the wicking, the lip serving to retain the
packing in place.
While such soft packing as wicking may be used, it is intended that it shall only
be temporarily used, and as a substitute for the soft metal packing, as occasion may
require, during repairs or otherwise.
In case of repairs required upon the valve seat it is only necessary to remove the
cap M, when the cage with the valve may be readily withdrawn from the case the
repairs made, and the cage with the valve returned.
This construction permits the screwing of the cap directly into the case, so that
the cap itself serves as the means of packing and supporting the valve-case, thereby
simplifying the construction to a very great extent.
The principal object of making the packing ring narrower than the width of the
recess in which it stands, is to prevent the sides of the ring from being forced into
contact with the adjacent sides of the case and cage, which if permitted would make
it difficult to remove the cage from the case.
In Figure 4 the invention is shown as applied to a globe valve, the same letters
indicating the same parts. In this case the valve seat is formed as a part of the cage,

page_text: but there is the same packing, and the same direct action of the cap upon the packing-
to secure the joint and hold the valve-seat-cage in its place.
The bearing between the valve-seat-ring and the case is illustrated as of conical
shape, and this is preferred, but the bearing may be in the form of a square shoulder,
as indicated in broken lines Figure 1.
Instead of screwing the cap into the inside of the case, and which is preferred,
the cap may be screwed onto the outside of the case-as indicated in broken lines,
Figure 1, but the same flange on the cap is retained, so as to bring the cap to bear.
directly upon the packing.
The non-conducting soft metal ring R upon the shoulders, may be employed in
connection with an indirect support from the cap instead of a direct connection, as
illustrated in Figure 5, where a ring like the flange P is introduced into the case, and
the cap bolted to the case with adjusting screws through the cap and the ring. This
modification simply illustrates that the invention is not to be understood as limited to
the bearing of the cap directly upon the packing ring.
:
The invention is represented as with a spring arranged to operate upon the valve,
in some cases this is unnecessary, and may be omitted without departing from the
spirit of this invention.
The construction of the cage and the packing may be applied to the valve without
the employment of the divided upper portion of the cage the valve-seat-ring B being
made an integral part of the cage; this construction is illustrated in figure 4, this
part of the invention is therefore not to be understood as limited to making the valve-
seat-ring detached from the upper portion of the cage.
The packing of the cage may be employed where the spindle is provided with a nut
and collar at its upper end instead of making the collar as an integral part thereof;.
this modification is illustrated in figure 5.
The invention has been described with special reference to inlet valves of air-
compressors, but the illustration which has been made will be sufficient to enable
others skilled in the art to apply the invention to other valves in which the cage is
employed.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed as communicated to me
by my foreign correspondent I declare that what I claim is :-
First. In a valve the combination of a case, a valve-seat-ring supported in said
case, a guide-ring distant from but concentric with the said valve-seat-ring the said
guide-ring constructed with a central concentric guide-tube, and wings extending to
the valve-seat-ring, the said wings forming a connection between the valve-seat-ring
and the guide-tube ring, the said guide-ring and tube divided longitudinally in the
plane of the axis, combined with a valve adapted to rest upon the said seat-ring and
constructed with a spindle extending therefrom through said divided guide, the said
spindle constructed at its other end with a collar as an integral part thereof, but of
larger diameter than the diameter of the guide, substantially as described.
Second. In a valve the combination of a case, a valve-seat-ring supported in said
case, a guide-ring distant from, but concentric with the said valve-seat-ring, the said
guide-ring constructed with a central concentric guide-tube, and wings extending to
the valve-seat-ring the said wings forming a connection between the valve-seat-ring
and the guide-tube-ring, the said guide-ring and tube divided longitudinally in the
plane of the axis, combined with a valve adapted to rest upon the said seat-ring, and
constructed with a spindle extending therefrom through said divided guide, the said
spindle constructed at its other end with a collar as an integral part thereof, but of
larger diameter than the diameter of the guide, and a spring around the spindle
between said guide-ring and said collar substantially as described.
Third. In a valve the combination of the case, the cage within the case composed
of a valve-seat-ring, and a ring above it, the said ring above the valve-seat-ring and
the adjacent side of the case constructed with annular shoulders as N C, the case
extended above its shoulder N, with a cap M corresponding to the case and constructed

page_text: with a flange P extending within the case and over said two shoulders N C of the
case and cage, with a metal packing R between the flange of the cap and the said two
shoulders, and with a valve supported within the cage, substantially as described.
Fourth. The combination of the case A the valve-seat-ring B and the ring D
connected to form a valve-cage, the valve-seat constructed to take a bearing in the
case, the said ring D and case constructed respectively with annular shoulders N C,
the said shoulders being inclined to each other so as to form a V shaped groove, a
cap M screw-threaded on to the case, and constructed with a flange P extending within
the case over the said shaped groove formed by the shoulders NC, and a packing ring R
concentrically over the joint between the said two shoulders, and between said
shoulders and the flange of the cap with a valve supported in said cage substantially
as described.
Fifth. The combination of the case A the valve-seat-ring B and
a ring D
connected to form a valve cage, the said valve-seat-ring supported upon a bearing in
the case, said ring D and case constructed with shoulders NC and the ring D with a
lip S above its shoulder the case, lip, and shoulders forming a concentric groove
around the upper end of the cage, a cap adapted to be screwed on to the case, and
constructed with a flange P within the case, adapted to enter said groove with a
packing ring R of soft metal, concentrically within said groove, but less in width
than the width of the groove substantially as and for the purpose described.
Sixth. The combination of a valve-case A, a valve-seat cage composed of the seat
ring B and the ring D connected thereto and constructed to form a guide for the
valve spindle, the said cage also constructed to take a bearing within the case, the
said ring D and case constructed with the shoulders NC respectively a concentric
packing ring arranged to take a bearing on both of said shoulders, a flange within the
case constructed to take a forcible bearing upon said packing above said shoulders but
without bearing contact with the said cage other than through said packing, and with
a valve arranged in said cage, substantially as and for the purpose described.
Seventh. The combination of a case A the cage within the case composed of the
valve seat ring B, and the ring D connected thereto, and constructed to form a guide
for the valve spindle, the said cage supported on a bearing in the case, with a cap, the
cap and case being constructed with corresponding screw-threads, and a packing
directly between the cap and the said cage, and without contact between the said cap
and the said cage except through the said packing, substantially as described.
Dated this ash d
Nombor 1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C.,
Agents for the Applicant.