Year: 1886

page_text: I, ISAAC GREENBURY of N° 6 The Arcade, in the City of Edinburgh, Jeweller,
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 :-
:-
My invention relates to lids or covers for sanitary vessels of the kind referred to
in the Specification of Letters Patent N° 2087 of 1885 granted to me and it has
for object improvements in the valve apparatus provided in connection therewith
whereby the syphoning out of the antiseptic or deodorising fluids contained in the
lids or covers is prevented and perfect action of the apparatus is ensured.
In the accompanying drawings which illustrate my invention figure 1 is a
vertical section of a slop pail in earthenware having a hollow lid adapted for
holding antiseptic or other fluid and provided with the improved valve apparatus
which is operated when desired to inject into the pail a quantity of the fluid.
Figure 2 is a sectional view of a similar lid as made in sheet metal and figure 3 is
a detailed view of the valve apparatus.
In a hollow knob A fitted to or forming part of the upper casing of the hollow lid
or cover B is fitted a hollow rubber ball or pump C through an orifice in the lower
end of which is fitted a plug D whose opposite end projects through the lower side
of the lid casing. In the plug D there are formed two ports or passages e and f.
The upper port e which is open to the interior of the ball communicates with a
lateral tube E, and the lower one f, is open to a tube F, which is in communication
by a small orifice g with the first mentioned tube E. At the extremity of the
tube E is a small inlet orifice h, opening to the liquid contained in the hollow lid B,
but which is normally closed by a small ball or lead shot i, serving as a valve, the
ball i, being retained at the end of the tube by a narrow neck j. In the under
tube F a valve seat is formed in a neck or compressed part of the tube and a
small ball or shot 7 fitted therein serves as a valve. The lower side of the lid
casing is dished upwards at its centre around the discharge orifice of the plug D
and the lateral tubes E, F, extend to the junction of the dished part with the main
portion of the lower casing of the lid so that the inlet orifice h is at or near the
point of greatest depth of the fluid in the casing.

page_text: In using the apparatus the ball C is compressed whereby the air contained in it
is expelled through the passage e, and pipes E, and F. On the ball being relaxed a
partial vacuum is created within it whereby a quantity of the liquid within the lid
is drawn into the tube E, and ball C through the inlet orifice h, the suction valve i
being raised by the inflowing liquid, and the valve being closed upon its seat c.
On again compressing the ball C the liquid is forced out of the tube E, through the
connecting orifice g to the tube F past the valve l and through the passage f into
the pail P or other receptacle, the passage f, terminating in a rose nipple by means
of which the fluid ejected through the apparatus is discharged as spray. Owing
to the dished formation of the lower side of the lid or cover the outlet orifice of
the passage fis at a higher level than the inlet h to the tube E, and syphoning out
of the contents of the hollow lid, which would not be prevented by the extremely
light valve closing said orifice, is avoided.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1. The combination of parts, constituting the improved valve apparatus for
effecting and controlling the discharge of the contents of hollow lids or covers for
sanitary vessels, substantially as hereinbefore described with reference to the
drawings annexed.
2. The combination of a hollow lid or cover of the dished formation herein before
described and valve apparatus for controlling the discharge of the contents of said
lid as and for the purpose set forth,