Year: 1887

page_text: 1, WILLIAM LOCKWOOD, Engineer, of Eagle Foundry, Lord Street, The Park,
Sheffield, in the County of York, do hereby declare the nature of the said Invention,
and in what manner the same is to be performed, to be particularly described and.
ascertained in and by the following statement:-
in
This Invention relates to certain improvements in and connected with valves used
pumps and in marine and other engines, the especial object of the Invention being
to obtain in an improved manner the maximum amount of exit or outlet area with a
minimum lift of the valve.
To this end the Invention consists essentially, in forming and adapting the valve
and its seating in such a manner, substantially as hereinafter described, as that when
the valve lifts, an exit or outlet is afforded both peripherally around the valve between
it and its peripheral seating, and centrally through the valve between the periphery
of a central outlet formed therein and a central seating or equivalent part adapted
thereto, the central outlet being so proportioned relatively to the peripheral outlet as
that the maximum desired amount of exit or outlet area is obtained with a greatly
reduced lift of the valve compared with that necessary to obtain a like outlet area in a
valve of an ordinary construction.
In carrying the Invention into effect I dispense with the stoke or central support
by which the lift of the valve is regulated and guided in existing arrangements of
valve mechanism so as to leave the central outlet as free as possible, and use in lieu
thereof for the said purposes means of the nature hereinafter referred to: but if
required the Invention inay be applied to valves constructed with such central
supports.
Such being the nature and object of the said Invention, I will now proceed to
describe the same more in detail, and in order that the Invention may be distinctly
understood I have hereunto annexed a sheet of Drawings illustrative thereof, and have
marked the same with Figures of reference corresponding with those in the following
explanation thereof; that is to say.
On the accompanying Drawings, Fig. 1, represents a transverse sectional illus-
tration of a valve and seating adapted in accordance with the present Invention,

page_text: showing the valve in its position of rest; Fig. 2, represents a like view showing the
valve in its lifted position: Fig. 3, is a perspective view of the arrangement illustrated
in Figs. 1, and, 2, showing the parts in the position indicated in Fig. 2, Fig. 4,
represents the Invention applied to an air-pump bucket, and Fig. 5, represents a
modification of the Invention.
1, represents the valve which may be made of a dished formation in cross section
as in the modification represented in Figures, 1, to, 4, or of a trough or V shape in
cross section as represented in Figure, 5, or of a tubular or flat formation in cross
section or of any other suitable forination which can be applied in the manner herein-
after described, and which valve in accordance with the present improvements, is
made or formed with a central outlet or exit opening, 2.
The seating of the valve is formed with a part, 3, adapted as a seating to the
peripheral edge of the valve, and with a part, 4, adapted as a seating to the central
outlet of the valve, so that provision is afforded when the valve lifts (see Figs. 2,
and 3) for the free escape of the water or fluid both peripherally between the valve
and its seating, 3, and centrally through the valve between the periphery of its central
outlet, 2, and its seating, 4.
The lift of the valve is regulated and guided by means of an annular rim, 5, which
is formed with three or more supports, 6, which are grooved or so otherwise formed
at their feet, 7, as to be capable of being applied and secured to a rim, 8, projecting
from the valve seating, by being lowered in peripheral recesses, 9, therein, and by
being sufficiently turned when in line with the said rim, 8, to engage therewith as
represented. The supports, 6, thus serve as guides to the periphery of the valve
causing it to rise equally at all parts, and the rim, 5, limits its rise.
The valve, 1, may, however, be guided by other suitable means not interfering with
or impeding the central outlet, such as by three or more vertical guide rods rising
from the cross bars, 10, hereinafter referred to, and passing through the valve at
equidistant points, between the central and peripheral edges of the valve. Or, when
the valve is used in a horizontal position, or as a safety valve, it may be normally
kept to its seating and returned thereto by a helical spring adapted between its outer
face and any convenient fixed part.
In the modification illustrated in Figure, 4, the valve is applied and used in a
reversed position to that represented in Figures 1, to, 3.
In adapting the Invention to an existing valve seating, the seating part, 4, may be
separate from the seating part, 3, and suitably adapted thereto removably or other-
wise, but when constructing a valve seating in accordance with the present improve-
ments it is preferred that the seating parts, 3, and, 4, should be formed together,
the seating, 4, being connected by cross bars, 10, or by other appropriate means to
the seating, 3.
The invention may, however, be adapted to an existing valve seating without
necessitating the application of an additional central seating thereto, by adapting the
central outlet, 2, of the valve, a spherical or other suitably shaped independent valve
piece, 11, as represented in Fig. 5, and in such a case other suitable guiding parts, 12,
spring from or are otherwise suitably adapted to the rim, 5, or to its supports, or to
any convenient fixed part, to serve as a guide and means of regulating the lift of the
said central valve piece, 11, and which lifts together with the valve, 1, until the latter
is arrested by its rim, 5, and then rises independently thereof, and so affords an
outlet through the said central opening, 2, in the valve, 1, as shown by the dotted
lines.
All the parts hereinbefore referred to may be made of any appropriate or suitable
metal or material.
Having now particularly described and ascertained the nature of my said Invention,
and in what manner the same is to be performed 1 declare that what I claim is:-
The Application to valves used in pumps and in marine and other engines of the
improvements herein before described, the same consisting:-
1. In forming and adapting the valve and its seating in such a manner substantially

page_text: as hereinbefore described as that when the valve lifts an exit or outlet is afforded both
peripherally around the valve between it and its peripheral seating, and centrally
through the valve between the periphery of a central outlet formed therein and a
central seating adapted thereto.
2. In forming and adapting the valve and its seating in combination with an
independent spherical or other suitably shaped central valve piece in such a manner
substantially as hereinbefore described as that when the valve and said valve piece
lift an exit or outlet is afforded both peripherally around the valve between it and its
peripheral seating, and centrally through the valve between the periphery of a central
outlet formed therein and the said valve piece which is adapted thereto.
3. The construction of such valves with a central through outlet adapted to operate
substantially as hereinbefore described.
4. The construction of the seatings of valves thus formed and adapted, with a
central part adapted as a seating to the central outlet of the valve substantially as
hereinbefore described.
5. The combination with valves formed and adapted with such a central through
outlet, of an independent spherical or other suitably shaped central valve piece adapted
thereto and operating therewith substantially as hereinbefore described.
6. The hereinbefore described improved means of regulating and guiding the lift of
a valve or valves formed, adapted, combined and operating substantially as bereinbefore
described.
DAY, DAVIES & HUNT,
321, High Holborn, London, W.C.,
Agents for the Applicant.