Year: 1888

page_text: Date of Application, 27th June, 1888
Complete Specification Left, 27th Mar., 1889
Complete Specification Accepted, 11th May, 1889
We WILLIAM NEWBOULD BAINES, of 6 Fenchurch Buildings, in the City of London,
Brass-founder, and ROBERT THOMPSON BAINES, of 40 Gaisford Street, Kentish Town,
in the County of Middlesex Engineer, do hereby declare the nature of this invention
to be as follows :-
Our invention relates to stop-valves of the kind- or class wherein two discs, plates
or valves are arranged to slide in contact with surfaces or valve-seats surrounding
the ways or passages in the valve-box or casing. and are provided with means for
operating them to open and close the stop-valve.
In our improved stop-valve we employ valves which are loosely held in a socket at
the inner end of the spindle or stem in such a manner that each valve has more or
Jess freedom of movement therein. We provide, moreover an inclined, conical or
wedge-shaped piece which is held, with a small lateral play or movement, in the
valve-box or casing between the valves, so that, when the said valves are moved
down to close the passage, they will be pressed or wedged tightly against their seats
by the said inclined, conical or wedge-shaped piece acting in conjunction with
inclined surfaces on the socket in which they are held, but can be released by a very
slight upward movement of the operating spindle.
Our said invention is conveniently and advantageously carried into practice as
follows, that is to say:-We form or fix on the inner or lower end of the operating
spindle or stem a socket with conical recesses into which conical valves having fint
working surfaces are so fitted that they have a small amount of play therein. We
provide a cone which is fitted loosely on a pin or stud extending upward from the
lower end of the valve-box or casing between the said valves. When the spindle is
operated to close the stop-valve, the conical valves are pressed downward against the
suid cone, which acts in conjunction with the conical surfaces of the socket, to wedge
the valves tightly against the valve-seats, the said cone and the socket adapting
themselves to any inequalities in the thickness of the said valves so that equal
pressure is applied to both valves to hold them against their seats. When the spindle
is operated to effect the opening of the stop-valve, the valves are released at the

page_text: commencement of the movement of the said spindle so that they can be easily raised
thereby. The said socket may extend either wholly or partially around the conical
parts of the said valves.
It is obvious that the valve-faces or the valve-seats may if desired be provided
with asbestos or other suitable packing.
Dated this 27th day of June 1888.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London,
Agents for the Applicants.
We, WILLIAM NEWBOULD BAINES, of G Fenchurch Buildings, in the City of London,
Brassfoundor and ROBERT THOMPSON BAINES, of 10 Ciaisford Street, Kentish Town,
in the County of Middlesex, 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 :-
Our invention relates to stop-valves of the kind or class wherein two discs, plates
or valves are arranged to slide in contact with surfaces or valve-seats surrounding
the ways or passages in the valve-hox or casing and are provided with means for
operating them to open and close the stop-valve.
Our said invention comprises novel means whereby the discs or valves, after they
have been moved by the turning of the operating spindle, to close the said ways or
passages, will be tightly pressed or wedged against their seats by the continued
rotation of tho said spindle, and will be released at the commencement of the move-
ment of the said spindle to open the said ways or passages, thus diminishing the
resistance to the movement of the said discs or valves.
In the accompanying drawing, we have shown how our said invention may be
conveniently and advantageously carried into practice.
Figure is a vertical longitudinal central section.
Figure 2 a central transverse section, and
Figure 3 a horizontal section on the lino z, z, Figure 1, showing one form of our
improved stop-valve.
Figure 4 is a front olovation.
Figure 5 a side elevation, and
Figure 6 a central transverse section of the socket or saddle hereinafter described.

page_text: Figure 8 an edge view, and
Figure 9 a central transverse section of one of the discs or valves.
Like letters indicate corresponding parts throughout the drawing.
a is the valve-box or casing which is formed with the ways or passages a¹, a².
b, are the discs or valves. c is a screw-spindle for operating the said discs or
valves; this spindle is passed through a stuffing-box in the valve-casing in tho usual
manner.
d is a socket or saddle which is formed with a nut in which works the screw-
spindle c. The discs or valves 6 are made with conical parts b¹ fitting into corre-
sponding recesses d¹ in the socket or saddle d, so that they have a small amount of
play or freedom of movement therein. e is a conical or wedge-shaped piece which
is secured to the bottom of the valve-casing a by means of a screw f, upon which the
said conical or wedge-shaped piece is free to turn.
When the spindle c is operated to close the stop-valve, the discs or valves b, after
they have closed the ways or passages a, a, are pressed downward against the
conical or wedge-shaped piece e, which acts in conjunction with the conical surfaces
of the socket or saddle d to wedge the said discs or valves tightly against their seats,
which surround the said ways or passages, the said conical or wedge-shaped pieco e
and the socket or saddle d adapting themselves to any inequalities in the thickness of
the said valves so that equal pressure is applied to both valves to hold them against
their seats. When the spindle is operated to effect the opening of the stop-valve, the
valves are released at the commencement of the movement of the said spindle, so
that they can be easily raised thereby. The said socket may extend either wholly or
partially around the conical parts of the said valves. The valve-faces and the faces of
the valve-seats may, if desired, be provided with asbestos or other suitable packing.
It is obvious that the construction of our improved stop-valve may be somewhat
modified without departing from the nature of our said invention. The cone or
wedge e is sometimes firmly fixed in the bottom of the casing a. We prefer to make
the said wedge in the form of a cone and to arrange the same as above described so
that it is free to turn and thus present different portions of its surface to the discs or
valves b. We do not, however, confine ourselves to the conical shape shown, as we
can, if desired, make the said wedge of other suitable form. We may, moreover,
substitute for the screw-spindle c other convenient dovices for operating the discs or
valves to open and close the ways or passages.
We are aware that straight-way stop-valves have been made with discs or valves
having on their inner sides inclined surfaces or wedges and so arranged that, in the
closing of the stop-valve, the movement of one disc or valve will be arrested by its
coming into contact with the bottom of the valve-casing, and the other disc or valve
continuing to move downward, the wedges on the back of the said discs or valves
will act in conjunction with each other to press the said discs or valves against their
seats. In such stop-valves, however, the discs or valves cannot be allowed to revolve
and therefore, when closed, are always in the same position relatively to their seats;
whereas in our improved stop-valve, the discs or valves, being loose in the socket or
saddle, can revolve and thus change their position relatively to their seats, so that
the faces of the said valves and seats will wear uniformly all around the same, thus
tending to maintain the fluid-tightness of the stop-valve. Moreover, in the said
stop-valves as heretofore constructed, the proper closing of the ways or passages is
liable to be prevented by the accumulation of deposits in the lower part of the
valve-casing; whereas, in our improved stop-valve, the discs or valves, by reason of
their formation, force their way into any deposits that may accumulate in the lower
part of the valve casing, so that such deposits do not interfere with the proper closing
of the stop-valve.
We are also aware that stop-valves have been constructed in which the discs or
valves are pressed against their seats by means of helical surfaces or transverse
screws, the said discs or valves, in their descent, being turned about their axes, by
stops formed on the valve-casing, to operate the said screws. In such stop-valves,

page_text: however, there is great liability to straining of the said transverse screws and con-
sequent injury to the threads thereof, and for this reason new or spare parts are
usually specially provided to replace worn or damaged ones. Moreover the discs or
valves do not, in closing, satisfactorily remove from their faces and those of the valvo-
sents any grit or other substance that may be deposited thereon while the stop-valve
is open whereas in our improved stop-valve, the discs or valves are always in rubbing
contact with their seats, therefore, in the closing of the stop-valve, any deposit upon
the faces of the discs or valves or upon those of the valve-seats will be effectually
removed.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we wish it understood
that we claim :—
First A stop-valve wherein the discs or valves are free to revolve in the socket
or saddle as above specified and will, after the closing of the ways or passages, be
forced against their seats by the continued movement of the spindle or other devico
for operating them, substantially as hereinbefore described.
Second-The improved stop-valve constructed substantially as described with
reference to the accompanying drawing.