Improvements in and connected with Stop Valves for Steam and other Fluids.
Year: 1890

page_text: Date of Application, 1st May, 1890
Complete Specification Left, 30th Jan., 1891-Accepted, 7th Mar., 1891
PROVISIONAL SPECIFICATION.
Improvements in and connected with Stop Valves for Steam and
other Fluids.
We, ARCHIBALD JEFFREY, and DAVID COCKBURN, of the firm of Archibald
Jeffrey and Company, of Shore, Alloa, in the County of Clackmannan, North
Britain, Engineers, do hereby declare the nature of this invention to be as follows,
that is to say :-
This invention comprises improved constructive details and combinations of
parts; and in carrying it out there is fitted in the lower part of a suitably
shaped valve box, a bottom valve seat of ordinary type, up through which
the steam or fluid passes when the valve is open, the steam or fluid passing on
from the valve box by a pipe fixed to one side. The valve is a disk valve
guided by means of a spindle on it or feathers working in the bottom seat,
and it is closed or opened by means of a spindle extending through a stuffing
box in the cover of the valve box, the outer end of the spindle being screwed
and working in a crosshead or yoke fixed to the cover. The spindle is not
fixed to the valve but enters down through a tubular part connected to the disk
of the valve by two small side bars. Below the tubular part a collar is fixed on
the spindle for lifting the valve by bearing up the tubular part when the spindle
is raised. The bottom end of the spindle with the collar on it has some play in
the space between the tubular part and the disk of the valve, so that the valve can
rise upon the spindle except when the spindle is screwed down into contact with
the disk and is holding the valve close on its bottom scat. Above the valve there
is a second seat which is movable but which is held down by the cover when the
cover is fixed in its place; and in certain circumstances hereinafter referred to the
valve can close against this upper seat, being free to rise on the spindle as already
stated. The tubular part attached to the valve is made with an external groove
in which are engaged the forked ends of a short lever fixed on a horizontal spindle
which is in a recess in one side of the valve box, and which recess is by preference
partly formed in a piece fixed to the side of the box. The horizontal spindle
passes out through a gland screwed into the side piece, and is made tight in the
gland by having formed on it a conical part bearing against the inner end of the
gland, a spring being applied to keep the parts in contact. Externally there is
fixed on the horizontal spindle a lever pressed or drawn downwards by a weight
or spring and another stronger spring or heavier weight is applied to tend to lift
the lever, but a disengaging device, which may be of any suitable kind is applied
to the stronger spring or weight, which can be thereby disconnected when required.
The disengaging device is connected by a cord or wire to a handle or handles in an
engine room or in any one or more places; and when required in an emergency or
for any purpose the stronger spring or weight can be thereby disengaged, and that
action will allow the downwardly operating weight or spring to act, and by turning
up the internal lever on the horizontal spindle to lift the valve and close it against
its upper seat. If from an accident there should be a large escape of steam by
the pipe leading from the valve box the increased current or rush of steam acting
on the valve will tend to automatically close it against its upper seat.
The
oppositely acting weights or springs may be proportioned or adjusted relatively
to each other so that an increase in the current of the steam or fluid above what is
considered a proper amount will cause the valve to close automatically.
Dated this Thirtieth day of April 1890.
EDMUND HUNT,
Applicants' Agent.

page_text: COMPLETE SPECIFICATION.
Improvements in and connected with Stop Valves for Steam and
other Fluids.
We, ARCHIBALD JEFFREY, and DAVID COCKBURN, of the firm of Archibald
Jeffrey and Company, of Shore, Alloa, in the County of Clackmannan, North
Britain, Engineers, 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, that is to say :—
This invention comprises improved constructive details and combinations of
parts; and apparatus made with the improvements is shown upon an accompanying
sheet of explanatory drawings, Figure, 1, heing a horizontal section and Figure, 2,
a vertical section.
In carrying out the invention according to the modification shown in the
drawings, there is fitted in the lower part of a suitably shaped valve box, A, a
bottom valve seat, B, of ordinary type, up through which the steam or fluid passes
(from a boiler for example) when the valve. C, is open as shown, the steam or fluid
passing on from the valve box by a pipe fixed to a flanged omlet, D, at one side.
The valve, C, is a disk valve gundel by means of a spindle on it, or it might be
feathers, working in the seat, B, and it is closed or opened by means of a spindle, E,
extending through a stulling box in the cover, F, of the valve box, A, the outer
end of the spindle being screwed and working in a crosshead or yoke, (i, fixed to
the cover. The spindle, E, is not fixed to the valve, C, but enters down through a
tubular part, H, connected to the disk of the valve by two side bars. Below the
tubular part, H, a collar or nut, J, is fixed on the spindle, E, for lifting the valve, C,
by bearing up the tubular part when the spindle is raised. The bottom end of the
spindle, E, with the collar, J, on it has some play in the space between the tubular
part, II, and the disk, C, of the valve, so that the valve can rise freely upon the
spindle except when the spindle is serowed down into contact with the disk and is
holding the valve close on its bottom seat, B. Above the valve, C, there is a
second seat, K, which is removable but is held down when the cover, F, is fixed
in its place by struts, L, which are by preference made of brass; and in certain
circumstances hereinafter referred to, the valve, C, can close up against this seat, K,
being free to rise on the spindle as already stated.
The tubular part, I, attached to the valve, C, is made with an external groove
in which engage the forked ends of a lever, M, fixed on a horizontal spindle, N,
which is in a recess in a piere, P', fixed to one side of the valve box, A. The
horizontal spindle, N, passes out through a gland in one end of the recess piece, P,
and is made tight in the gland by having formed on it a conical part, Q, bearing
on a conical surface formed in the gland, a spring, R, being applied to keep the
parts in contact. Externally there is fixed on the spindle, N, a lever, S, loaded
in a downward direction by a weight, T, or it might be a spring; and another
stronger spring, U, or it might be a heavier weight is applied to tend to lift the
lover, but a disengaging device, V, is applied to the stronger spring, U, (or weight)
which can be thereby disconnected when required. The disengaging piece, V, is
jointed upon the end of an arm, W, formed on the yoke, G, and is shaped so as in
the position in which it is shown to hold in a concave part of it a pin of a forked
link, X, connected to the spring, U. The piece, V, has attached to it n cord, Y,
or a wire which is to be led over guide pulleys to any appropriate part or parts
such as an engine room, and has one or more handles, so that when required in an
emergency or for any purpose the stronger spring, U, (or weight) can be disengaged
by means of the cord or wire, and that action will allow the downwardly operating
weight, T, or spring to act, and by turning up the internal lever, M, to lift the
valve, C, and close it against its upper scat, K.
If from an accident there should be a large escape of steam by the pipe leading
away from the valve box, A, the increased current or rush of steam acting on the

page_text: valve, C, will tend to automatically close it against its upper seat, K, even without
the spring, U, being disengaged. The oppositely acting weights or springs (T, U)
may be proportioned or adjusted relatively to each other so that an increase in the
current of the steam or fluid above what is considered a proper amount, will cause
the valve, C, to close automatically.
In the drawings the parts are shown in the positions in which they will be
generally employed, but they may be arranged to suit any desired direction of the
How of fluid, upwards, downwards, horizontally or at an inclination.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is :-
1. Combining the parts of and connected with stop valves for steam and other
fluids substantially in the improved manner herein before described and shown in
the accompanying drawings.
2. In connection with a stop valve capable of being closed on one seat by means
of a screw spindle against the current and of closing against another seat by the
action of excess of current, arranging a lever to act on the valve such lever being
acted on by adjustable oppositely-acting weights or springs one of which can be
disengaged by means of a cord or wire substantially as and for the purposes
hereinbefore described.
Dated this Twenty-ninth day of January 1891.
EDMUND HUNT,
Applicants' Agent.