IMPROVEMENTS IN VALVES AND COCKS
Year: 1878

page_text: LETTERS PATENT to Herbert John Haddan, of the Firm of Herbert and
Company, Solicitors of Patents, of 67, Strand, in the City of Westminster,
Civil Engineer, for the Invention of "IMPROVEMENTS IN VALVES AND COCKS."
A communication from abroad by James Powell, of Cincinnati, in the State of
Ohio, in the United States of America.
Sealed the 6th December 1878, and dated the 22nd October 1878.
COMPLETE SPECIFICATION filed by the said Herbert John Haddan at the
Office of the Commissioners of Patents on the 22nd October 1878.
HERBERT JOHN HADDAN, of the Firm of Herbert and Company, Solicitors of
Patents, of 67, Strand, in the City of Westminster, Civil Engineer. "IMPROVE-
MENTS IN VALVES AND COCKS." A communication from abroad by James Powell,
of Cincinnati, in the State of Ohio, in the United States of America.
The improvements relate to that class of cocks commonly known as "globe valves,"
and consist,-
-
First. In combining the clements of a screw stem guided to an axial position
relatively to the valve seat, with an ordinary loose disc or flexibly attached valve.
Second. The Invention further consists in the provision of a locking device,
whereby such valve disc, when worn unequally, can for the time being be rigidly
united with its stem, for the purpose of being ground or reground to its seat through
the instrumentality of said stem; also, in securing such discs to the stem for
regrinding, whereby the loose disc valves are locked through the medium of said
stem.
Third. The Invention further consists in the arrangement of loose disc valves
with guiding devices, which co-act constantly around the stem to maintain both
valve and stem in a truly axial position in relation to the seats, whether in the
loose or rigid condition of the valve; also, in a provision below the beveled or
seating portion of the said dise valve of a prolongation or extension which snugly
fits the straight walls of the opening in such cocks, and thus serves both to guide

page_text: the disc and regulate the passage of fluids through said opening, while, at the same
time, said extension prevents undue wear of the parts in the act of opening or
closing the cock, or any lateral play of the screw stem within its nut through the
instrumentality of the body neck and the downward extension or prolongation of
said valve, maintaining said stem in an axial position at all times.
1
The Invention further consists in an arrangement of a loose guide collar and
its accessories for the convenient and accurate grinding and regrinding of the
valve.
The Invention consists also in a peculiar arrangement and construction of the
valve disc and locking device for regrinding.
In one form of the regrinding globe valves the valve stem is provided with fixed
wings or guides for retaining said stem in an axial position with respect to the seat
while being reground, but in a modification of the improvement, in its preferred
form, these guide wings consist of projections from a loose or moveable collar
surrounding the threaded part of the valve stem, thus enabling cocks embracing
any principle to be made in the ordinary manner, without fixed guides on the
stem, and yet have the advantage of the application of guiding facilities to said
stem, and for the purpose of grinding the valve proper to its seat in the body of
the cock.
Globe valves made on the improved plan may be readily repacked under full
pressure at any moment, whether the valve be in its closed or in its extreme open
position.
In the annexed Drawings,--
Fig. 1 is an axial section of a globe valve embodying the improvements.
Fig. 2 is an axial section of the valve proper, at right angles to the above.
Fig. 3 shows by side elevation a modification of the improvements; Fig. 4 is a
horizontal section of said section at the line X-X.
Fig. 5 is a partially-sectionized side elevation of a modified form of the globe
valve; Fig. 6 is a perspective view of the loose guide collar of said valve.
Fig. 7 is a transverse section of a modification of the collar.
Fig. 8 is an axial section showing the manner of facing the collar against the cap
preparatory to repacking the stufling box.
Fig. 9 represents the improvements as applied to a check valve.
The body A of the cock has a neck B with a smooth cylindrical interior b, which
extends downward into said body A to insure greater length of bearing for the
wing guides F. The aforesaid neck has a screw-threaded exterior b', which exterior
receives the interiorly screw-threaded hub or screw nut C, c, that is surmounted
with a customary stuffing box D). The valve stem E is provided with guide wings
or bearings F adapted to fit and slide within the cylindrical interior of the neck.
The lower end of stem E is so constructed that a shoulder or enlargement is formed
by means of a ring G sprung or forced into an encircling groove e near the lower
end of said stem, which ring engages with the interior shoulder of plug H, and
thus prevents said plug slipping off said stem E. Plug His screwed into the
recessed and screw-threaded back of the valve proper or disc I just so far as, while
permitting free vibration of the disc with reference to the stem and unobstructed
rotation of the latter, to at the same time preserve the disc from any undue looseness
or lateral play. The under side of this plug is chambered out of sufficient capacity
to enclose the ring G. Stem E terminates in a swell el, which, when said stem is
depressed, bears solidly upon the upper side or back of the disc.
The plug H has a notch or cavity J, which, when it is desired to so unite the
stem and valve as that they shall revolve together, receives the tongue of lock
piece K, which piece has a slot to receive a set screw L, by which means said
piece K is secured either in or out of lock with the valve. This lock piece K tapers
downward, and is of such width as just to fill the space between two of the guide
wings, in order to compel the simultaneous and equal rotation of the stem and disc
when they are locked together.
When it is desired to grind the valve to its seat the hub or nut C is unscrewed

page_text: and the valve is momentarily withdrawn; the set screw L being then loosened, so
ns to allow tongue k of lock piece K to drop into the cavity J of the valve, the said
screw is again tightened; sand, powdered glass, or other suitable abradent being
then applied, the stem, with its now rigid valve, is restored to its place, and is
rotated alternately to the right and left with a downward pressure, the hub C
meanwhile remaining loose. The grinding having been accomplished the valve and
stem are withdrawn once more and the lock piece K restored to its upper or inactive
position; the stem, with its now loose disc, is then returned to its place in the
body, and, finally, the hub C being screwed home again the valve is at once ready
for use.
The improvements are not confined to the precise arrangement here selected for
illustration, as a lock piece, substantially as above, may be employed in various
ways; for example, the guide wings may form part of a loose collar F' (see Figs. 3
and 4), which collar may have a tongue K¹ permanently occupying a suitable cavity
in the valve, thus compelling the guides F to constantly co-act with said valve disc,
as though it were in one piece with the nut or plug H. In this form tho locking
and unlocking are accomplished by simply tightening and loosening the set
screw L', the point of said set screw entering a circumferential groove in the stem E,
serving in this form the twofold purpose of tightening, as above, and (being
Blackened) of holding.collar H to its place when out of lock.
The valve I has a downward cylindrical prolongation or extension i below its
bevelled portion, which prolongation, snugly fitting the straight walls of the cylin-
drical passage Al, serves the purpose of more effectually guiding said valve in the
act of grinding than it dependence were had on the wings F alone, and is intended
to displace wings on the sole of the valve, and in addition to the office as performed
by said wings to enable the passageway of the valve to be more readily controlled
by the operator in the act of opening or closing the same. This peculiar con-
struction of the valve dise also prevents in a great measure the cutting or wearing
action on the valve or seat by deflecting the currents of fluid when said valve disc
approaches or recedes from its seat.
In the modified form of the Invention, as shown in Fig. 5, the globe valve or
cock has the customary neck B with a smooth cylindrical interior N of larger
diameter than the contiguous interior of the globe chamber, so as to present a
ledge or shoulder n for support in its lowest position of the guide collar, herein-
after described; and said neck has a screw-threaded exterior n¹, which exterior
receives the interiorly screw-threaded hub, cap, or chamber C, said hub being sur-
mounted with a customary stuffing box D. Valve stem E is threaded in the
ordinary manner as far down as the fixed collar O.
In addition to the above I provide a loose guide piece or collar P, whose cylin-
drical orifice p is adapted to slide or revolve freely over the threaded portion of
valve stem E, while at the same time the periphery of the wings p', which radiato
from said collar, is adapted to fit and slide snugly within the cylindrical interior N
of neck B, which interior may be extended downwardly, the same as seen in
Fig. 1.
In the preferred form of the above the fixed collar O is is surmounted by a raised
rim or seat o, which, in the elevated condition of the valve, fits and occupies an
annular depression or gutter 2" on the under side of loose collar P, and the said
loose collar is itself surmounted with a raised rim or seat p, which, when the
valve is elevated, occupies an annular gutter c in the under side of hub or cap C.
The valve I has a prolongation or extension i, similar to the prolongation shown
in Figs. 2 and 3, and for the same purpose. Said valve I is chambered out on top
to receive the lower swell of screw stem E, and is provided with a lock pin R,
which, when the valve is in its normal condition, works in a circumferential groove
near the lower end of said stem E, so as to retain the valve in place without effecting
its capacity for independent oscillation and rotation.
When it is desired to grind valve I to its seat the cap C is temporally unscrewed,
and the valve and stem being withdrawn lock pin R is screwed down into a

page_text: suitable countersink in the circumferential groove of stem E, so as without impairing
the free oscillation of the valve to oblige it to revolve in unison with said stem in
the operation of grinding. A suitable abradent being now applied the loose
collar P is adjusted to its place in the neck B, and thus becomes a guide, through
which stem E revolves, and by which said stem is retained in a truly axial position
while the valve is being ground. The grinding having been effected lock pin R is
disengaged from the countersink of the circumferential groove so as to allow valve I
to revolve upon stem E.
Should it be necessary to repack stuffing box D.while the cock is in use, or while
a full head of fluid is passing through the same, the operator has merely to screw
stem E back to its fullest extent, or until fixed collar O is brought in contact with
loose collar P, and the latter forced up against the inner end of cap C, so as to
secure a perfectly tight joint, which having been done, the gland D may be removed
to receive the packing in the usual manner.
The loose collar may, instead of the winged piece P, consist of a circular ring or
plate, or it may be a simple cross bar dropped into vertical grooves in the neck of
the cock, as in Fig. 7, or the fixed collar O may bear at once in the depression of
cap C in the elevated position of stem E, as represented in Fig. 8. The groove e in
the hub C may be dispensed with, if desired, as a tight joint can be obtained by
simply forcing the fixed collar O tightly against the flat under surface of loose collar
P and hub C. In case lock pin R on set screw L should at any time become lost,
or detached, an auxiliary cavity or pin hole is drilled through the plug H or valvo
dise I, and the stem E, as indicated by dotted lines in Fig. 5, for the reception of a
pin, nail, or peg, or other convenient device, which may be driven in for the time
being, so as to couple stem E and disc I together for the purpose of grinding the
latter to its seat. It is obvious that all of these improvements relating to a guided
valve and stem will apply to a check valve as well as to the ordinary globe valve
or cock, in which case the valve proper and its stem are cast in one piece, and the
cap C is closed at its upper end, as seen in Fig. 9, sufficient space being left between
the stem and cap to permit the automatic lift of the valve. In regrinding this
check valve, cap C is first unscrewed from the body or shell A, and stem E is then
rotated so as to grind the valve to its seat. This rotation or reciprocating rotation
may be effected by inserting a screwdriver in a suitable nick or slot in the upper
end of stem E, or by the application of a wrench or other implement to said stem,
the loose collar F remaining in the neck so as to maintain stem E in an axial
position with reference to said neek, while the regrinding is being accomplished.
1. In combination with a screw stem of a globe valve or cock, a loose disc valve,
constructed substantially as described, so as to be capable of being locked for the
purpose of grinding.
2. In the described combination with a valve stem provided with a self-adjusting
valve, the locking piece Ķ or its equivalent, adapted to operate as set forth.
3. In combination with the lock pin K or its equivalent, the plug or hub H of a
loose disc valve having an opening or cavity J for the purpose of locking said disc
in the act of grinding.
4. In the described combination, the following elements, to wit, a valve stem
having guides for preserving its axial position when released from the screw cap;
a self-adjusting valve, and the tongued and adjustable piece K adapted to enter the
cavity J in the valve, and to be secured either in or out of lock, substantially as
and for the purpose set forth.
5. In combination with a screw stem adapted to maintain an axial position in
the neck of a globe cock, a loose disc valve so constructed as to be guided at its
lower end, substantially as stated.
6. The described downward prolongation 6 of the interior wall of the neck B of

page_text: a globe valve or cock, in combination with a screw stem adapted to be guided
within the same, as and for the purpose explained.
7. The described cylindrical prolongation or extension of a valve disc, for the
purpose of guiding said disc and controlling the passage of fluids, and to prevent
undue wear of the parts, substantially as set forth.
S. The loose collar or guiding plate P, supported by the globe valve neck N,
substantially as herein described.
9. The packing collar O in combination with a loose disc valve, and the hub C as
herein described.
10. The valve I and valve stem E, in combination with the supported guide
plate P, for the purpose herein described.
11. The described loose disc. valve I, with the lock pin R passing through the
body of said valve, in combination with the screw stem E, as and for the purpose
set forth.
12. The described loose disc valve I, lock pin R, stem E, fast collar O, and loose
collar P, combined as set forth.
13. The valve I, loose guide plate P, body neck n, n', screw stem E, and handle
T combined, substantially as herein described.
14. A slot, or perforation, or cavity, or other receptacle made in the valve I and
in the lower part of stem E to receive any device wherewith said members I and E
may be temporarily coupled together for regrinding, substantially as described.
15. A check valve consisting of shell A, valve I, stem E, loose collar or plate F
and closed cap C, as herein described.
16. The spring collar G in combination with screw stom E, valve I, and plug H
of a globe cock, for the purpose described.
17. The combination in a globe cock of a lockable loose valve I, valve seat M,
screw stein E, and handle T, for the purpose set forth.
18. The described loose collar or guide plate F' located within the neck of a
globe valve, substantially as set forth.
In witness whereof, I, the said Herbert John Haddan, have hereunto set my
hand and seal, this Twenty-second day of October, A.D. 1878.
IT T HANDAN
H. J. HADDAN. (..)