Improvements in Valves.
Year: 1894

page_text: Date of Application, 27th Feb., 1894-Accepted, 5th May, 1894
COMPLETE SPECIFICATION.
Improvements in Valves.
I, HARVEY HALLOCK BURRITT, of No. 83 Walnut Street, City of Newark,
County of Essex, and State of New Jersey, United States of America, Mechanical:
Engineer, do hereby declare the nature of my invention and in what manner the.
same is to be performed, to be particularly described and ascertained in and by
the following statement :-
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This invention has for its object to provide a valve in which, by a slight move->
ment after the valve is closed, the valve discs are brought to firmly bear against
their valve seats, whereby the valve is securely closed.
The invention consists in the general construction of valve herein set forth, and
also in certain novel arrangements and combinations of parts, such as will be
hereinafter more fully set forth and finally embodied in the clauses of the claim.
In the drawings herewith accompanying,
Figure 1 is an end view of my improved form of valve, Figure 2 is a longitudinal
vertical section of the same; and Figure 3 is a horizontal section of the valve,
taken on line 3-3 in said Figure 2.
Figure 4 is a view of one side of one of the valve discs, and Figure 5 is a vertical.
section of the same, taken on line 5-5 in said Figure 4.
Figure 6 is a side view of a yoke or cross-bar used in connection with the valve
discs in my present form of construction of valve, Figure 7 is a top view of the
same, and Figure 8 an end view of said yoke or cross-bar.
Similar letters of reference are employed in each of the above described views
to indicate corresponding parts.
In said drawings, a represents the valve case provided in the top with a suitable
opening a upon which is secured in any convenient manner a hollow cap b,
having a perforation 6', which is suitably enlarged, as at 2, and as will be clearly:
seen fron Figure 2.
In said perforation or opening of the cap bis rotatively arranged a valve.
stem c provided on its lower portion with a screw-threaded portion c. On said.
valve stem and loosely arranged in said enlarged portion of said opening or
perforation b', is an enlargement or collar c* formed integral with said valve stem,
or said enlargement or collar may be made in the form of a ring which is
slipped upon the stem c and then secured thereto in any convenient manner, as
will be understood.
b
Secured to said cap 6 by means of suitable bolts d, see Figure 1, is a perforated
plate d' provided with the usual form of stuffing box d, through which projects
the end of the valve stem for raising or lowering the valve discs and thereby
opening or closing the valve.
Said plate d' which is secured to the top of said hollow cap b, forms with said
enlarged portion 6 of the opening ', a chamber in which said collar on the
valve stem is retained, but is free to rotate therein. This allows of the valve
stem c to be freely turned in either direction, but prevents the stem from moving
upward or downward and holds the stem at all times in its proper position.
On the lower end of said screw-threaded valve stem c, I have arranged a screw-
threaded nut provided with a square or angular flange f¹.
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page_text: In said valve casing a, as will be seen from Figures 2 and 3, are arranged the
valve discs e and e', each of which is formed on its inner surface with the inwardly
projecting flange e³, substantially as illustrated more especially in Figure 4. Said
flanges are provided at the bottom with the grooved portions and at the top with
the grooved portions e* and the recessed portions e, which portions e³ and e', when
the said valve discs are in position in the valve case, form openings for the valve
atem c, while the flange f¹ on the sleeve f fits into the recessed portions, which
prevents said sleeve from turning with the screw c, and, when the valve stem is
turned, said sleeve which moves up and down upon the screw-thread of the
said stem, causes the valve discs and e' to be raised or lowered, as the case
may be.
Each valve disc is provided with a suitable ring es, of non-corrosive metal, which
forms the face of the disc, said rings.e coming in close contact with rings a² in said
valve case, as will be clearly seen from Figure 3.
Each valve disc e and e' is provided with suitable lugs e' which incline toward
the bottom, as will be evident from Figures 2 and 5, and are hollowed to form an
oblong recess in each, as shown more especially in Figure 4.
Arranged between said valve discs e and e¹ is a yoke or cross bar g, as clearly
shown in Figure 3, and said yoke or cross-bar is provided with a central longitudinal
ribg having a centrally arranged opening or hole, as shown in Figure 7.
Near both ends of said rib g¹ are oppositely projecting arms g' from which
extend longitudinally with said rib g' suitable supports g³. Between said arms g³
and the collar g' formed around said central opening in said yoke or cross-bar
arranged the inclined webs or portions g³, as clearly shown in the plan view in
Figure 7, and as indicated in dotted outline in Figure 8.
are
In said valve case are two oppositely placed lugs or ears a* and a', as clearly
shown in Figures 1 and 3, and the purpose of which will be more clearly described
hereinafter.
Loosely and movably arranged in said oblong recesses in said lugs e and riding
on the said inclined webs 98 of said yoke or cross-bar y, are small balls or rollers h
as indicated in dotted outline in Figures 1 and 2, which balls or rollers are made of
any suitable hard metal, and may be tempered and copper-plated to prevent them
from rusting.
The operation of the device is as follows :-
:-
When the valve is closed, as is clearly shown in Figure 2, said supports g of the
cross-bar or yoke 9 rest upon the lugs or ears a³ and a' in the valve casing, while
the balls or rollers h are tightly wedged in between the inclined webs g of the said
cross bar or yoke and the recesses e in each disc e and e. Now, when the valve
stem is turned to raise the valve discs, said sleeve ƒ moves upwardly on the
screw-thread c¹, whereby said plates are raised, and by bringing the edges e of the
herein above mentioned flanges e in contact with the lower edges of the support g
on the bar or yoke g, the latter is raised with the discs e and e¹ to a position within
the chambered cap b, which permits a free passage for the water or other liquid to
be conveyed through the valve, as will be clearly understood. When the valve
stem is turned to close the valve, said discs e and e¹ and also the yoke or bar g
move downwardly, and when the discs have been lowered to such a point that they
nearly close the openings a' and a in the valve case a, the supports g³ on said bar
or yoke will come in contact with the lugs a' and a* in the valve case, thus holding
said bar or yoke in this position.
At the same time the discs are permitted to travel still further in their downward
course, but said balls or rollers in the oblong recesses will ride on said inclined
webs g of the bar or yoke g, whereby said valve discs.e and e¹ are forced forwardly
in opposite directions, causing their facing rings e to closely. bind against the rings a³
in the valve casing a, whereby the valve is firmly closed.:
Of course it will be evident that I can dispense with the use of said balls or
rollers h, in which case the inclined lugs will ride directly upon the inclined

page_text: webs g, as will be clearly understood; but I prefer to use the balls or rollers h, as
in that case there is less friction and the parts are less liable to rust and stick when
the valve has not been used for some time.
It will thus be seen that the mechanism is extremely simple and not liable to get
out of order and the several parts can be easily removed for repairs, when
necessary.
Of course it will be evident that certain changes in the arrangement and com-
binations of parts may be made without departing from the scope of my invention,
and I therefore do not wish to limit my invention to the exact form and construction
of valve herein shown.
The mechanism herein shown and described is especially well adapted for different
classes of valves and especially gate valves, and is also well adapted for the use
of valves in hydrants.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what 1
claim is :-
1. In a valve, the combination, with the chamber thereof, of the two-part valve,
consisting of valve discs e and e', each provided with a pair of downwardly inclining
lugs having oblong recesses therein, balls or rollers in said recesses, and a bar or
yoke between said discs, said bar or yoke having a central opening formed by a
collar g, longitudinally arranged ribs extending on opposite sides from said collar,
and a pair of inclined webs g on each side of said ribs, against which said balls or
rollers ride, substantially as and for the purposes set forth.
2. In a valve, the combination, with the chamber thereof, of the two-part valve
discs e and e¹, each provided with a pair of downwardly inclining lugs having
oblong recesses therein, balls or rollers in said recesses, and a yoke or bar between
said valve discs, having inclined ribs against which said balls or rollers ride,
substantially as and for the purposes set forth.
3. In a valve, in combination, with the valve case, provided with oppositely
placed lugs or ears a³ and a*, a screw-threaded valve stem, a pair of valve discs,
a yoke or bar between said discs adapted to be supported by said lugs or ears a³
and a', when the valve is closed, and said bar or yoke being adapted to be raised
by said discs when the valve is being opened, and means on said bar or yoke and
said valve discs for forcing said valve discs forward in opposite directions when the
valve is nearly closed, said means consisting essentially of inclined lugs on said
valve discs, having oblong recesses, balls or rollers in said recesses, and inclined
webs on said bar or yoke, against which said balls or rollers ride, substantially as
and for the purposes set forth.
4. The herein described valve, comprising therein a valve casing a, a chambered
cap b, a screw-threaded stem c, a sleeve of having a flange f¹, valve discs e and e
engaging with said flanged sleeve and adapted to be raised thereby when said
valve stem is turned, and means connected with said valve-discs for forcing said
discs forward in opposite directions when the valve is nearly closed, said means
consisting essentially of inclined lugs on said valve discs, having oblong recesses,
balls or rollers in said recesses, and a bar or yoke 9 having inclined webs against
which said balls or rollers ride, substantially as and for the purposes set forth.
5. The herein described valve, comprising therein a valve casing a, a chambered
cap b, a screw-threaded stem c, a sleeve f having a flange f¹, lugs as and a* in
said valve casing, valve discs e and e' engaging with said flanged sleeve / adapted
to be raised thereby when said valve stem is turned, a yoke or bar between said
valve discs adapted to be supported by said lugs a' and a', when the valve is closed
and said bar or yoke being adapted to be raised by said dises when the valve is
being opened, and means on said bar or yoke and on said valve discs for forcing
said valve discs forward in opposite directions when the valve is nearly closed, said
means consisting essentially of inclined lugs on said valve discs, having oblong

page_text: recesses, balls or rollers in said recesses, and inclined webs on said bar or yoke,
against which said balls or rollers ride, substantially as and for the purposes set
forth.
Dated this 15th day of December 1893.
HARVEY HALLOCK BURRITT.
Haseltine, Lake & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.