Year: 1885

page_text: I Sir WILLIAM VAVASOUR, Baronet, of Poultry Chambers in the City of London
do hereby declare the nature of this Invention to be as follows:-
My invention refers to a valve or vent apparatus which is operated by the action
of the liquid rising in a vessel in which the valve or vent apparatus is placed.
According to my invention I prefer to make the valve proper of cup shape having
a spindle of triangular or other convenient section, the latter being free to rise and
fall in for example a cylindrical case and which is in communication with the
atmosphere by a passage or passages. The valve spindle being, for example, of
triangular shape and the passage through which it works round, when the spindle
is down air can pass down into the vessel, to which the valve is applied, between
the spindle and the wall of the aperture in which the spindle moves.
The top
surface of the valve is fitted with a washer so that when the valve is up to its
seating it keeps the joint tight and air cannot enter. The cup shape of the valve
is preferred because the air confined therein, as the liquid rises, becomes compressed
and the pressure thereby obtained tends to keep the valve up to its seating.
Valves constructed in this manner are particularly applicable to my self acting
measuring tap for which I have applied for a patent dated 22nd January 1885
No 943 but it is applicable to other apparatus.

page_text: I, Sir WILLIAM VAVASOUR, Baronet of Poultry Chambers, in the City of London
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 refers to a valve or vent apparatus which is operated by the action
of liquid rising in a vessel in which the valve or vent apparatus is placed.
And in order that my invention may be clearly understood I will particularly
describe same with reference to the accompanying drawings.
Figure 1 being a vertical section of my improved self-acting valve; Figure 2 a
plan of same, and Figure 3 a perspective view of the valve proper.
According to my invention I make the valve proper 7 of cup shape having a
spindle of triangular or other convenient section, the latter being free to rise and
fall in, for example, a cylindrical aperture or case and which is in communi-
cation with the atmosphere by a passage or passages. The valve spindle 1* being
for example of triangular shape and the passage through which it works round,
when the spindle is down, air can pass down into the vessel, to which the valve
is applied, namely between the spindle and the wall of the aperture in which
the spindle moves and is guided. The top surface of the valve is made with a
surface to suit the seating above, or is fitted with a washer so that when the
valve is up to its seating, the valve face or washer keeps the joint tight,
entirely closing the aperture 13, and air cannot enter. The cup shape of the valve
is preferred because the air confined therein, as the liquid rises, becomes compressed
and the pressure thereby obtained tends to keep the valve firmly up to its seating.
Valves constructed in this manner are particularly applicable to my measuring
tap for which I have obtained Letters Patent dated 22nd January 1885 N° 943,
but it is applicable to other apparatus, and according to the size, almost any power
can be exerted, in closing any sized air aperture or air exit that may be required,
and it is particularly adaptable to closed cisterns or other objects containing
liquid.
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
In self-acting valves or vent apparatus, the cup shaped valve, provided with
spindle of triangular or other section for guidance of the valve, the said valve being
operated by the action of rising liquid substantially as and for the purposes herein
set forth. -